Sansui's are truly the best! I am the 2nd owner of a G7700 model and I would not trade it for any other vintage receiver in the world. I have tried over 40 receivers and although found certain Akai receivers to also perform extremely well but this Sansui is got power and the sound is clear and it works well with some huge speakers. I maintain all my vintage electronics on my own and what I have learned over the years is when it sounds good do not touch it inside. The usual maintenance includes cleaning the pots and switches and checking for any burn light. The caps and transistors do not go bad so easily on these units. Keep it dust free and at room temperature and you will have a great sounding unit for decades to come. How do you know if you have bad caps ? You can take a peak inside and check for any leaks but usually if you know your receiver you will know it sounds and could detect right the way that the caps need replacement, other than that none vintage receivers need any cap or transistors replaced, I know this is debate with certain technicians some say replace them but what for? the parts made back then were made to last these days not so sure! Enjoy the sound if you own one of these!
@@coyote5.02 I am guessing the receiver belonged to an old man who passed away and then his relatives threw away his stuff instead of taking care of them or giving them to good hands.
Thank you for sharing with us this beautiful receiver. I own a Sansui 717 with the matching tuner that I bought new in the 70. I still enjoy listening to my favourite musics with those pieces of equipment.
I bought a Sansui 2000 receiver at the PX in Korea in 1969. I was on a remote mountaintop radio site and ran a pair of speakers from the Quonset hut up to our radio shack so we could listen while working. One night a thunder storm rolled through (seeing lightning coming up the side of a mountain WILL make you a believer). That blew an output fuse and that is never a good thing, I pulled it apart and found at least one output TO-3 had shorted. I wrote Sanui in Japan explaining what happened and asked them to let me know how much it would cost to buy a pair of output, drivers, and a schematic so i could send them a check for the parts. About a week later i got a smallbox with all the parts, a service manual a phone number in Japan to call if I had any problems fixing the unit. I was very happy with level of service they provided me. I just went through a 1978 2300 Sanyo receiver for a buddy. He got it off Ebay and paid more than I think it was worth but it was in A-1 condition, the wood case and front panel was in perfect shape. One ST-078 power output was blown and i replaced a few suspect electrolytics in the power supply and cleaned all the controls. These old receivers sound great when you restore them and build quality is very good compared to what you see these days
16:30 When I saw that reddish orange glow of that switch arcing, I thought boy, that 12voltvids scrolling signboard looks just like flames as it shines through the chassis. Come to find it was a fire! Holy Crap! Magic smoke indeed, LOL
I absolutely love this thing! I don't know how am I going to pay for it but some day I'm gonna get one of these This is how a stereo should look like and sound like.
That high-end vintage stereo receiver is *45 years old,* and the IF is *still* spot on. I'm amazed you didn't have to realign it! They don't make stuff like that anymore!
WoW...nice! I got decent oldies (70's), a BLACK (rare)Marantz 2385 and a Fisher _Quadraphonic_ 4 channel Receiver, cool feature is the joystick on the front panel you can swing the channels around the room... Used to work @ a Vintage Stereo Repair Shop, mainly McIntosh, Marantz, H.H Scott, etc also sold Magnaplaner speakers (flat), got those receivers from non-pickup and notified
I see these going for 2 grand. I was offered 1000 for it about 9 years ago and I laughed at the guy that wanted to buy it from me. He did give me 500 for a technics slp50 which he turned around and sold for 700 the next week at his vintage stereo shop. Kicking myself for selling that cd player. It had been a 4000 cd player when new.
@@12voltvids It is very very similar in various visual ways to Sony of the time. Vertical boards, enclosed tuning capactor, color and styling of boards, tuning string and mechanism, heat sink, lamps. It is quite obvious one of them was chasing the other, or they did so mutually. Even the bar A.M. antenna they both had going on just like that. Same speaker terminal styles, same style FM connectors, same 5 pin DIN - I mean I guess it was more than just these 2 companies and it was the times, but still! Your video made me look at STR-7065 and see about it more than I knew already. heh heh Any tricks for getting the tuning string unstuck? I never use radio but would be nice to make it rock well again anyway. It gets stuck at a certain spot or two, and you can see that it is in the part right exactly behind the dial itself, on one of the wheels. I am thinking to clean the string itself along with the wheels with a dry paper towel. I don't really know though.
Remember these old receivers are really simple compared to modern stuff. Vacuum tubes even simpler. You'll find a few TH-cam channels where techs specialize in tube gear and don't venture much into solid state. Why, because they are very simple. High voltage but really simple and easy to understand. Early solid state are also relatively simple too.
Thanks for sharing! I also have one which I bought brand new in 1978. Purchased at Sun Stereo in Berkeley Ca. for $399! Used to have a set of Sansui SPX-7500 but had to sell. Recently bought a set of Sansui SP-X9. Have always loved the sound of this receiver! Mine is running hot so need to do some repairs. Thanks and enjoy!!
Purchased one of these back in 77 while stationed in West Germany. Best receiver ever. Left it at my mom's house after being shipped to Korea, MY MOM GAVE IT AWAY. I wonder if that is my old one. You nevet know.
Love the comment "...these things go for stupid amounts of money". I have a few vintage pieces and can relate. I've, so far, avoided that part of the hobby by choosing to stay away from the popular, well known high wattage pieces. The pieces I now own seemed to have found me rather than me finding them - although I do find myself to be on the lookout for stuff all the time. I grew up with my dad owning a lot of Sansui gear as well as a killer Sony deck and one of the first Mission CD players... This video was excellent!!!. I really enjoy all the details and your very down to earth, straightforward approach. You have the knowledge base to cut through all of the audiophile nonsense out there from people that get wrapped up in the craziness of marginally if even noticeably better performance claims for crazy amounts of money by listening to people who haven't got the necessary technical knowledge to discern fact from fiction. Anyways - I always learn something valuable from your videos. Great stuff!!!
You don't need to spends bug bucks to to get good sound. Aydiophools on the other hand i have found are many times old guys (older then I am) with too much money and ears well past their prime.
I believe that you have a 9090 there. The 9090db had a problematic board for dolby that had islets for the double sided board. The solution is to add a wire jumper in each islet. I own two 9090's not DB's with the same light issues and had to just wire the dial lights on all the time contacts too burned. I ran a service center for Sansui at the time when these were new.
@@12voltvids yours has jacks on the back to plug in a Dolby Unit. There's not a dolby board in there. The selectors on the front simply activates those jacks.
@@ChartRecordsFan No that is for the 4 channel Dolby FM board. There is a seperate button that activates that. In the out position it is Dolby FM and press that switch and it activates those jacks on the back. It's for the front channel return. The rear channel went to a seperate amplifier.
We used to do that at the shop too. People would bring things in approve the estimate and then once it was repaired it would sit in the shop for a month or two before they come to collect it. We would phone literally every two days to remind people to come and get their VCR or their stereo and some would just leave things sit. So we started charging a storage fee. I think it was 20 bucks a week that's what we charged and that got people in to pick their stuff up.
I have the Sansui AUG 99x which I bought in 1987, love it. Will never get rid of it. Do not know what will happen to it when I am dead in 30 or 40 more years. I hope my equipment goes to someone with some damn common sense and not sell it. What I am hating right now is the issue of Right-to-Repair. If this was how electronic companies back then performed business our equipment would never have been made. Can you imagine that? Such beautiful equipment with amazing sound not being alive today.
I had a early 80's Sansui receiver I was given it from my uncle,my grandparents bought it for him new, anyways in the late 90's it got knocked out by lightning that is why I now have a Kenwood vr505, which I really like but if my Sansui hadn't gotten damaged I'd still be using it..
I'm also an old consumer electronics technician. I've been at it since the 70's. Done TV repair and allocated the audio duties in most of the shops as well as my own shop when I had it. I've worked on many Sansui's. Mainly the G series as memory serves. The Drive Board Shield should be replaced (if possible) because it serves two important functions. First and foremost it gives the drive board physical integrity. The socket in which it's placed can lose electrical contact intermittently. If the socket becomes cracked, or the drive board is stressed in any fashion, this may cause the amplifier to fail catastrophically. The socket has been known to become brittle due to age and heat which further exacerbates the issue. Second it serves to shield the small signal section from RFI as well as 60 HZ issues. As good insurance all the small electrolytic capacitors on the drive should be replaced while it's out. Avoid pulling and pushing it back in too many times because of the above mentioned issues.
Well i don't have it. I don't recall if it was on when i got the amp or not. I think not. I only know if its existence from servicing other amps the same. I was not the first to get into this. The first was a shop that gave a huge estimate. It was then brought to me and I repaired. I believe I was trying to get 200 for it all in and the owner bitched and complained (through my cousin that brought it to me) so we agreed that I would keep it. Glad i did.
@@12voltvids I thought as much. As long as it's not bumped around too much, and there isn't any kind noise induced, I'm sure it'll be okay. I should look around for these old units. I had no idea they sold for the kind of money you mentioned. I enjoy your channel. It brings back memories.
The best time to buy these was in the late 80's people were dumping all this 70's hifi stuff at garage and this was long before ebay and the internet came along, I paid $20 for this receiver at a garage sale.I had so much 70' stereo gear my house literally looked like a hi-fi store. In total, I don't think I ever spent more than $1K on all the gear I bought.
A coworker mentioned the controls on his old receiver were crackling, and audio would cut out randomly on each channel... would I be able to repair? He mentioned it had a 120/240 V switch inside. I really wondered why that would matter, or why he would know. Anyway, I said sure bring it in, and I'll clean the controls in a few minutes, and you can take it home. Days later, on the back seat of his car, buried within a half a dozen couch pillows was a Sansui G-9000 that looked like the day it was made!! That car could have rolled ten times, and his Sansui would have been unscathed. Once I took the cover off, I told him there was no way I could do this in a few minutes as I had first mentioned. I took it home, dismantled to pieces on the bench, and cleaned and checked everything. Not a mark on it anywhere. 10/10 condition and operation. I was simply astounded how well he looked after it. Then I learned an amazing part of the story (and why he knew about the voltage switch). He had purchased it new in Montreal, maybe around 1977, shortly after immigrating from Nigeria. In 1986, he returned to Nigeria to deal with family matters, and brought the Sansui G-9000 to Nigeria, where it had to be operated on 240 V. He told me when he returned to Canada, the only thing he brought back was the Sansui G-9000 ! Amazing this receiver did a return trip from Canada to Nigeria, and there is not a nick or scratch or bent control shaft... nothing. He has since retired, but he still tells me how happy he is with his beloved receiver working properly.
Sansui 9090 DB receiver Pioneer CT-F750 cassette deck Kenwood GE 1000 Graphic Equalizer Technic SL-DL1 Linear Arm turntable. (Needs work) Bose 301 small speakers Sony SS 870 speakers All bought in Okinawa at the Kadena Air Base exchange in 1978. The 301s wore out years ago. Currently running 501s. The turntable needs the drive wheel replaced. And I wish I could find a good tech to clean the controls properly on the 9090. Have to wiggle and jiggle sometimes for popping or drop off. But not too much. I just last weekend got the Sony speakers back from a friend who had held them for me for 40 years. They are so big, I didn’t really (still don’t) have the room. But she is remodeling so I had to go get them. Today I played some Pink Floyd and Fleetwood Mac for my 10 year old granddaughter. She hadn’t heard them before. I use an old iPad with a cracked screen as my music input in the auxiliary. With Amazon music. She HEARD them today. The Sansui and the Sonys were rocking! All these years later, the quality is still there. You don’t see gear like this anymore. I didn’t know what I was buying. Just bought more than I could afford. The exchange would have factory reps there to talk up the gear. Guess I did alright.
Now that's a beauty for sure! Always loved the good analog tuners too. May have to eventually track one down myself. Not this one due to price, but I also wouldn't need that much power
The 6060 is worth a look, & really, the 9090....awesome unit, but do you really need all that power...my 6060 ...got the looks, sound & cranks loud enough when the neighbors aren't home 👍
@William Schwartz yeah, I had no idea there were that many different Sansui series of receivers, I gather the 881, 771, 661 models are largely overlooked but as good 👍
I’m commenting early but I know you don’t believe in total recaps but....this unit certainly does deserve all new fresh capacitors!! Ok back to the video. Very excited lol!
Actually it doesn't. Sounds fantastic. Recapping is overrated by serviceman hungry to make money, uneducated amateurs that believe everything they read on the internet and DIY that have no idea what they are doing. I could make a ton of money just changing out capacitors. When they are leaking or esr has gone up then yes but all the ones I tested measured as good as a new one, and I checked others off camera. They all tested good. The listening test proves that they are fine as the sound is punchy and crisp.
When I first clicked on the vid, I thought boy I hope he isn't going to just shotgun replace the caps in this. So glad you didn't. I own 4 G 9000s and theyall work fine after all these years.....I just rotate then in service through the years. Nothing sounds better! Great vid.
Anybody can change caps and amateurs do because they don't understand how they work. The reason a capacitor fails is either because it wasn't manufactured properly, or damaged during install or was run beyond its rated voltage or frequency. Caps made in the late 80s and throughout the early 90s were problematic due to chemistry changes to make them more environmentally friendly. In the early 2000s many power supplies failed due to designers using caps too close to their rated voltages causing them to overheat. I tested many of these, even though i only showed on camera measuring 3, I did Infact check several others and they were all well within spec so i left them alone for now. The sound is very clear and punchy. Changing to modern caps will definately change the sound and not necessarily for the better because newer caps will have different chemestry which will impact sound. I did a recap job years ago on a big marantz amp. Client supplied expensive audiophile caps and paid me 100 to change. A few days later he returned and paid me 100 to put the originals back because he didn't like the sound. Felt the then 40 year old caps sounded more natural and that was what he was accoustomed to. So I made 200 for doing nothing basically.
Wow that's a loverly amp/tuner :-D The power transformer is just massive, what a monster :-D A possible mod to save the lighting switch could be a mosfet and a couple of resistors to switch the lights and save the switch. Worth thinking about dave.
@@12voltvids Yes leds would be a good improvement, but they are rather directional. i sanded some leds to scatter the light in my mates tensi (akai), sanding made a hell of a difference. I added a regulator and preset so he could adjust the lights to his spec. He was stunned by the lighting quality, i was just happy to help a good frend.
One thing I find one these Sanui's from this era are the fusible resistors. All mainly in the power amp section, find that they just go open , or grossly out of tolerance. Working on a 9090 right now with one channel humming , to find R 30 (390 ohm ) open . Then found R39 and 40 (10 ohm) open , checked the rest of the fusible resistors , and out of spec. And recently did a AU-117 , 14 resistors where bad , and all the transistors were good on both units.
my 1977 Sansui 9090db and my Technics SB 7000-A speakers still works but it needs love I have done my own cleaning control pots my patients aren't as used to be I need to get it done by me or another mabe my brother he said we could but distance is a factor and so money is too thats why techs like you haven't touch it since the 1990's when one fixed new volume pot new driver board all new heat sink transistors back when prices was doable, can't imagine a full restoration to do that 2grand to pay off tech efforts specially dolby section mines been to many new years eve parties its been on the road as much as Willie Nelson 9090 and my Technics SB 7000'a speakers that i'm very proud of , metric size not quite 15inch big sound Ted Nugent had bunch at some live venue saw the pictures 40 if memory is right 20 left 20 more right still haven't found same picture hifi magazine in late 1970's another magazine had John Belushi had copy of my whole rig in his apt. made me even prouder new I had a killer system.., you got lucky getting yours even cheaper than mine was a christmas sale 1977
Friend, thanks you for indication. I have one 9090 with the same problem. In Brazil, professionals who understand these devices are rare. There are the "curious ones". Will be one repair make by myself. Again, thank you.
These old designs are really not that complicated. Tube gear even easier. Once digital gets involved they can get really complex. Even i shy away from those.
A Sansui 9090DB was the first set I ever heard rock n roll through. It belonged to my Uncle and now I own it. I've had it serviced once, but the old heads that know how to do this have since retired. So I went searching and found this. Thank you from the bottom of my heart.
Yes I have long since retired from the service business as well. Left in 2003 asbi could see the way the industry was headed and didn't want to be the last one out. Got our when i we're still young enough to retrain and go into a second career that the phone company. I'm now getting close to retirement from that career and I just tinker with electronics now to keep the mind Sharp and I'll continue as long as I can for as long as people still want me to fix their stuff.
Years ago, my friend sent this Sansui 9090 to the local agent for repair. What happened was unbelievable, the agent had "lost" his set and was given a 6060 in return. The 6060 had a bottom cover which was a sheet of aluminium with no holes. The set was not working as well. I guessed that the service guy was up to some monkey business eyeing the 9090.
I got a kenwood kr 3010 from 1979 to 80 from German ebay spares or repair its had a drop at some point i reckon ,bass pot shaft is slightly bent as is the shaft for tuning dial not to bad biggest problem is the volume pot is damaged its not smooth at all and needs replacement as it is damaged i will remove and try and see if i can take apart and sort it .this unit is only 27 watt per a channel but sounds good i bought as parts to fix my dads amplifier receiver but got confused somewhere along the line wrong make and model but it is to good a little work and i will keep it .Your sansui looks like a nice unit quite a powerful receiver .
Dave....This receiver sounds awesome. I’ve seen Sansui stuff listed on eBay and never heard of ‘em. I am in the midst of wanting to get a retro stereo system w/ a graphic EQ....looking to go a little nutty and do two pairs of speakers & two pair of subs.
@@12voltvids I would said same thing but a nice pair really rocks the house I picked up a pair of klipsch not top of the line but ok in my book amazon $150 apiece
Sansui's GOLD era .... What a tank. I have a a Seven model (before this series) and .... construction is NO EXPENSE, chasis is all copper plated inside. The only thing this amps need to be taken care off is fresh caps ans inspect for corroded components because the infamous glue of death (more on the 717).
i have two sx 1280's and one sx 1980. the first 1280 my dad bought in 1997 for $50 from a guy he did a job for. the 2nd 1280 i got from ebay about 8yrs ago for $750 came with the box & is in excellent condition. only thing that was missing was the owners manual. the 1980 i got from ebay about 4yrs ago for $700 it was a little beat up and was missing some knobs and one of the bass controls were broken off. i probably have about 8 or 900 in it after buying the parts for it which is still a good deal. also some of the heat sink fins are broken off. trying to figure out how to fix them.
i have one that i brought in japan 1978 in the air force....stopped working 5 years ago, still powers up ,but no sound,it was king of stereo wars on base
Recently picked up one of these and the speakers also. Had the same problems with the switch contacts. Thank you for this video! I am getting a little static from the volume control. Any suggestions as to what I can do to remedy that?
I had a Sansui 4-channel in 2007 I bought from a record store for $50 and got it home and noticed there was no headphone jack ! I wish I would have noticed that before I bought it, but $50 wasn't to terrible for it. The thing is, I only got $25 for it on eBay, so I ended up losing $25 on it. I'm sure it would be worth at least $300 or more today.
Don't be so sure about that. eBay is a money laundering site. These vintage amps you see selling for big dollars mostly don't even exist. It is a way for organized crime to move money around and create a paper trail so it shows as clean money. The fees that eBay and PayPal charge is the cost of doing business. Looks like legitament sales transaction when on fact they were shipping bricks or books around in boxes to complete the illusion that something valuable was shipped. It gets the public thinking that these old stereo components are super valuable and people post them and wonder why they don't sell for the huge dollars that shows in model sales history. There was a documentary done about 6 of so years ago showing how they do it. Anyway that is why your receiver gets no bites when sales history shows multiple units if same model selling for a few grand. I see people put stuff up on Facebook at redecules prices initially and then they start dropping the price till someone finally bites. The dhr1000 that i bought for 50 initially was listed at 500. The betacam SX i picked up for 100 was initially listed at 1000 then 500 then 300 i offered 100 he wanted 250 I said 100 is max i am going and got it for 100. Then it turned out to be a pal camera. Had i known that i would have offered 25.00!
13:08: Lol, Not to "ME" they don't.....But almost Everything is high now for vintage receivers. That's why I'm glad we had a Goodwill Electronics recycle store here that I still have receivers I only paid $15 and $25 for, until they figured out what people were doing selling them for higher prices and they jacked up the prices on everything. Either way, they're long gone now and I lucked out keeping a couple of them I still use 10 years later
Yes I have noticed. Last good deal i got was a Samsung sv5000 multi system converting VCR for 25.00. I haven't been in there for a long time. I really should check them out. I go through Facebook marketplace looking for interesting things. Just bought a betacam sp broadcast VTR for a good price.
These old receivers were far better built than todays firmware driven models. Other than worn switches and pots, and dried out capacitors they are very reliable. At least you can repair them without a lot of expensive surface mount rework gear. As a young electronics tech in the early 70's, i learnt how to fault find on these receivers. They were expensive to buy in the 70's now they are very expensive if you can find a fully working one.
@@12voltvids I would keep it, i made the mistake of selling a load of classic hi-fi when i moved home in 2013, i got very little for it, now the same items are selling for many times more.
You can find an un-serviced one for 1000 to 1500, add 100 for shipping then at least 600+ for a recap at minimum plus a couple more shippings back and forth to the repair man. About 2000+ to get a nice working one on your shelf.
Generally they do not need recapping. 45 years ago electrolytic caps were really made well. They took a dive in the late 80s and into the 90s when the environmental standards and rohs guidelines came into play. These old ones were over spec. 80 volt caps running at 61v. By the 80s they were putting in 64 caps and driving them to within a volt of the limit. Sure I could replace them all, but what will that accomplish when it sounds as good as it does. It will change the sound, no doubt about that but make it better? Not necessarily because modern caps are totally different spec than the originals. If it ain't broke then leave it alone.
@@12voltvids It depends on the unit. I've been through several Sansui G/AU units & some were obviously treated better than others. I repaired a G5500 a while ago (blown outputs) that had been shelved many years ago. ALL the caps in it were fine. OTOH, I went through an AU717 & almost every ecap on the drivers & main PS board were bad, & 2/4 main filter caps were testing >20% low. Another one was cracked/leaking at the + terminal but, ironically, tested within 10%, lol. Then there's the whole glue thing, but that's another story...... I enjoy your videos.......always seem to pick up something from them.....thanks.
Have been recapping vintage gear for years....Think Mundorf, Nichicon KA, Elna Silmic II, Nichicon Muse......It makes a huge difference, especially after a couple of weeks of listening. Caps dry out over time especially after 40 + years.
When they dry out the esr goes up. They all measure good. Some day I will do it but it sounds fantastic. I had it running all day today at good volume and everything sounds fantastic. I have plenty of equipment that is over 40 years old and full of old caps and it all works perfect. Thanking them all because they might fail is a huge waste of time and money.
@@12voltvids It's possible 40+ year old Caps still function.....but Wow with New/Modern Audio caps, selected properly, sound way better. Try it out you may change your mind Dave
@@Sans_Solo_ some day i will do it. It sounds so good as it sits I can't really imagine it sounding any better. You haven't heard this one on the big window shakers. I did a recap on my luxman hybrid and to be totally honest i was hard pressed to hear the difference. It did fix the phono preamp, those ones were bad for sure but the others I can't say i can hear a difference. Judging by how good this currently sounds I am betting that i won't hear a big improvement. I am sure there will be changes in sound especially is the tone control circuits as that is where most of the caps are, which really won't make a difference because I run the tone circuits switched out with the bypass switch's on. I don't even use the loudness switch. With the big speakers I have they have so much low end as it is.
As the Saying goes - and I hear my dad keep saying this { If it aint broke DON'T Fix it } But wow You really have a beauty there and Sounds Better than the receivers today... Of course now you have to say that right after I just typed it -LOL
I have a bunch of Sansui gear including AU888, 331, 101, TU-555 and a QS-1 Quad decoder. Nothing as nice as this 9090DB. Even though I have all this stuff, I spend my time listening to youtube on a Lepai 2020, lol.
I have the black beast. The AU-9500. I brought it home from overseas in 1976, never been touched. Works fine no problem what so ever. Been thinking that i should have someone look it over. Any thoughts ???
I got one of these given to me by an older lady that wanted some stuff cleared out. It is pretty dusty and a little more scratched up. Guess it was a good deal for free.
@@kevinnelson9588 protection light means DC on outputs. Check drivers and output trabsistors. Good luck. Mine was like that when I got it. 8 output trabsistors 4 drivers and several resistors.
I’ve got about 7 of these and about 5 of their DB brethren. However, I think it needs to be noted that they’re value will only go as high as a budget deal will go. So here’s the example. In today’s age, if you’re looking for a well built high wattage receiver, you’re looking at around maybe 1-3k. At this point it’s a far budget friendly investment if you spent around 800-1500$ on a 9090 depending on who or where you buy it from 🤷♂️ the price per watt is definitely better than buying the new Chinese made equipment. And let’s not even talk about the ridiculous prices Mcintosh sells their 60-120 watt receivers for. At that point you’re paying for the brand rather than a fine piece of equipment. 😒
I was given a Sansui qrx9001, no sound in left channel in 2 channel mode. all lights work . Only gets source in tape 2 input, not in aux. lot's of static. Not sure I want to sink a ton of $$ in it, only to have more problems down the line, however the sound I get from the right channel is very good. Suggestions?
I believe these capacitors age like a fine wine. Unless there are some definitely bad, I leave them alone. I did a total recap once and I regretted it.
Hi, quick question. I have a kenwood integrated amplifier with 125 watts per channel in 8 ohms, 350 watts power consumption and 110v. I use an AC voltage regulator rated at 500 watts max. I noticed when loudness is turned on with the amplifier and the volume control is at 8 oclock I hear distortion. I hear the woofer popping, my speakers are rated at 6.3 ohms 150 watts and 88db sensitivity. My question is, does the low power ac voltage regulator causes the distortion? I hope you can answer this. Thanks in advance!
Hello, I have the identical receiver every once in a while in FM tuner it will start making a clicking noice canceling out the sound like as if it was out of tune but works fine in all other modes, any thoughts?
Got a Sansui G-8700DB which is 160 watts per channel, similar story, shorted outputs both channels, 6 burned up resistors on the driver boards which go so hot the solder melted and the resistors wires popped out of the board. driver transistors cooked, slow start 3.9 ohm power resistor open, huge project.The owner bailed and said keep it. Ordered the ON semicondutor T03 outputs from Mouser, but need to find replacements for the drivers. 2SC2238B-LB O,Y and 2SA968B-LB O.Y Finding modern suitable replacements for the drivers is the last hitch holding this project up. Would you know that would replace these? That is the hardest thing about working on this old transistor gear is devices that are not made anymore. Tube gear is so much easier.
That's the problem now with solid state gear. Old semis are no longer made and you can't sub many. Small signal transistor yes but power transistors no.
I heard that you had used different transitors, for your repair. I am doing the same thing on one that I repairing. Did you have to do anything to the bias settings? Thanks for your help.
The outputs were original. 3 of the 4 drivers were also original types. One was subbed because obviously the supplier didn't have the original. I got my dates wrong too. I thought i got this in the 90s but my wife showed me a picture of it set up in our old place and we lived there 88 to 93 so i got this a few years before i thought. She remembers the fight i had over being paid as it was a cousin that brought it to me for his friend. I used it through to about 93 than it was packed away and not run much after then.
@@12voltvids I have the same memory shifts, lol, I check with the former missus, on things going back that far.The onkyo tx-4500 was my first, it is long gone. Enjoy your work, thanks for getting back to me, David.
No it doesn't. Sounds great. Been down that road. Did a full recap years ago. Customer supplied audiophool grade caps. Every one changes. Sounded good to me but client was unhappy and had me reinstall all the old caps and wouldn't pay me for the rework. All new caps have a totally different sound that people that are used to the old sound don't like.
Thanks for sharing. I have a Sansui 9090 that i purchased in July 1976. Purchased it with my first cost of living check from Chrysler. Have not used it in 30 years. Had some kick ass parties with ohm F speakers back then. Tried playing it a few years ago , but it was a no go. Recommend anywhere to have it checked out here in Macomb Michigan?
No have no idea where to get it serviced. Mine came to me dead. All outputs blown. Replaced all outputs and driver transistors. Got in a debate as to how much he was going to pay. I put about 125 in parts into it and the bill was 200 total. Owner wanted to take it and pay me later. I said nope, cash and carry only. Said he needed time to get the funds. I said on 25bs month storage fee. A year later he shows up with 200 and said back to him 25 a month is 300 plus the 200 for the repair. Now it's 500. He said he thought i was joking when i said that. I asked if he thought the bank was joking on the interest they were charging for the parts I had to buy to fix it? Told him it now it goes up 50 a month so he better pay up if he wanted it back. He abandoned it.
@@12voltvids I don`t blame you one bit. You had to put your time , money and effort into it. Now you can enjoy it any time you want. Cash on Delivery. 👍
@@jomama7458 well it was my cousin that brought it to me back in the 80s when it was still relatively young. It didn't belong to him, it was a guy he was sharing a house with. So he didn't have the cash and I wasn't about to release it till I was paid. As far as i know it was from HOT distributers. This cousin was the "black sheep" of the family. Only related by marriage. He was my uncle's second wife's son. Hung out with bikers and such and had a party house. Didn't want to take it to a shop if you catch my drift. Anyway i didn't ask, didn't want to know. All I do know is i put 12 transistors, and a few resistors in it to get it running. It's got plenty of power but it really doesn't sound that good. None of those amps sound good. They all have really high distortion by today's standards and it's the nasty odd harmonic distortion that makes all these amps sound pretty harsh. I'm a tube guy, I like the warm sound of a tube amp. My technics suv9 destroys this one as far as sound goes. This sansui has distortion rating 0.1% my Technics is 0.003. Tube amp is probably closer to 1% but that's even order which is pleasing to the ear. The difference is even order is always an octive higher. Play an A and the distortion is also an A the next and subsequent octives up so the sound blends in and just makes the instrument sound bigger, more like the human ear responds to sound. Odd order harmonics you play an a and the harmonic is a f# or some other note that clashes and just sounds nasty. For big power i use a crest vs900. Now you are talking serious power. 450 per channel into 4 ohms 230 into 8 ohms. I play vinyl through the sansui because vinyl doesnt sound that good to begin with.
@@12voltvids Oh no doubt there were better stereo receivers back in the day. I was very happy with this one back in my much younger days. The fm stations came in loud and clear but the vinyl was only so so at best. Still have them all boxed up also. Pack rat i guess. Also the old Philips 212 turntable. Will still try to get the old set up going again with my newer Yamaha speakers and drive my wife nuts. lol. Good chatting with you.
Are they generally problematic? Was looking to get on but after watching your video I'll probably stick with the smaller recievers, less parts to go wrong?
No these are not problematic receivers. I got this one back in the '80s. It came to me from a black sheep cousin. You know every family has one of those right! My cousin not blood but through marriage brought me this receiver it was his roommates. all the outputs were blown drivers were blown bunch of resistors burned up because the guy obviously had shorted speakers or something and cranked it to 12 and roasted everything inside. I rebuilt the unit for him all new transistors couple of resistors drivers got it all working perfect and when it came time to get paid my cousin was like yeah I'll take it to him and collect your money. I said no you give me the money first and then you can have it you're not taking it until I get paid because I don't know what's going to happen he could blow it up again and then say it didn't work and then say I'm not going to pay for it after he's got it so until I'm paid for it it stays here. Guess what I never got paid for it and I got to keep it. I've had several offers to purchase this receiver over the years mobile guy offered me $600 I laughed highball guy offered me $1,700 I said no thanks I'm going to hang on to it. Someday someone will come along and make me an offer that I can't resist and then just then maybe I'll part with it. But then I don't need the money so it would have to be a pretty generous offer even though I don't put much value in the unit I do know what people pay for these things so if I'm going to sell it I'm going to get what people will pay for it I'm not going to give it away.
So my audiophile buddy has just passed to me his "2006 fully restored" 990 Blackface he paid a King's Ransom for a couple years ago (peak ROVID lockdown).. He cannot find any technician willing to risk their wallet to work on it!!! (this is how crazy this Vintage kit ownership thing has become). He's been using it regularly but it now intermittently cuts out on one channel! So i've opened the thing being so damned careful as in setting it out on its own workspace of a really big wood worker bench & bringing my test gear to it... The 1st thing i find is the abomination of what that 2006 restoration was.... The thing's full of soldering iron melted insulation/exposed conductors wires & every pcb solder join has been resoldered BUT there's now WAAAY too much solder on just about every join.... Oh & i'm not happy looking at the state of the Protector Circuit board.... chop sticking the base of the relay & yep... bad sounds. Wish me luck on this nightmare.... incidentally i'm trying to understand how the unit you have here was so blown up, the protector circuit is pretty good for the era so what did someone do?
I have no idea what was done but it was blown up real good. It was brought to me in late 80s and the repair I believe was about 200 and the guy that owned it wanted to negotiate the price. I wouldn't negioate so it was abandoned.
Hi Dave I have a problem of my sansui if the press auto no ca catch signal but mono or manual have a signal what is the problem?thank you for your reply
I have no idea what was done to blow this one up before. Valves don't care about open circuit. It's the output transformer that cares. Crank up a valve amp with no load and watch your output transformer short.
I would have at least verified the idle bias and DC offset after all the years and for video demonstration purposes. It would have been interesting to know how much any of that has drifted if at all??
It shouldn't have drifted much if any. Resistors typically don't change their resistance except for one carbon ones when they get hot and this was past the carbon resistor era. I have been enjoying the receiver today in my living room. So much so I might not even get up to shoot a video. Wonderful sound. These caps, 45 years old probably sound as good today as they did when the receiver left the factory. Funny, I turn on the jazz and within a few minutes my 4 legged furry friends join me and just chill out.
@@12voltvids you gotta check the voltages so you can see if your electronic passive components are on the brink of failing. These particular models can stay in operational mode even if the drift is high before the protect clicks on.
@@savagedick1462 no DC offset on the outputs. That was checked previously. One of these days it will be fully overhauled but it really isn't in use as i have much better sounding more powerful system.
Even tho I’ll never pay more than a thousand dollars for that cos back in a days in the 70’s that’s only $150 dollars only fulls will pay more than a thousand dollars now a days.I rather have the money.
I mentioned this earlier. 12Volt deleted my comment. lol. Somebody doesnt like being corrected. You, however, are correct. This is NOT the 9090DB as he stated in the opening. Good catch.
Those old receiver amps are such beasts ,I absolutely love the craftsmanship !
Sansui's are truly the best! I am the 2nd owner of a G7700 model and I would not trade it for any other vintage receiver in the world. I have tried over 40 receivers and although found certain Akai receivers to also perform extremely well but this Sansui is got power and the sound is clear and it works well with some huge speakers. I maintain all my vintage electronics on my own and what I have learned over the years is when it sounds good do not touch it inside. The usual maintenance includes cleaning the pots and switches and checking for any burn light. The caps and transistors do not go bad so easily on these units. Keep it dust free and at room temperature and you will have a great sounding unit for decades to come. How do you know if you have bad caps ? You can take a peak inside and check for any leaks but usually if you know your receiver you will know it sounds and could detect right the way that the caps need replacement, other than that none vintage receivers need any cap or transistors replaced, I know this is debate with certain technicians some say replace them but what for? the parts made back then were made to last these days not so sure! Enjoy the sound if you own one of these!
In my country someone found this exact model in the trash, took it home and it worked out of the box! Just unbelievable...
Είχα βρει ένα Sharp GF 777 και ένα TEAC Elcaset AL 700 σε καθάρισμα αποθήκης. Δουλέψανε απευθείας.
Τι πράγματα πετάνε ρε φίλε...
That happen when the people have toO much Money in pockets and no brain in his skull
Probably some dumb kid or young adult that doesn’t know any better.
@@coyote5.02 I am guessing the receiver belonged to an old man who passed away and then his relatives threw away his stuff instead of taking care of them or giving them to good hands.
I found one too at a trash, mine works but the glass and wood all broken.
I remember all these receivers in all of the electronic stores!! Great stereo sound and quality!! Great video, Dave !
It's like getting an old 70's muscle car going 🔥👍
A 1970 LS6 Chevelle...
@@scrappy7571 that's a big block yeah ? 👍
@@lancecooper4646 450 firebreathing horsepower big block lol
@@scrappy7571 stop it, you're getting me excited, Sansui 9090's & Big Block Chevelles....I'm gunna pop my circuit breaker 🔥😈
Thank you for sharing with us this beautiful receiver. I own a Sansui 717 with the matching tuner that I bought new in the 70. I still enjoy listening to my favourite musics with those pieces of equipment.
Set this one up today in living room. Sounds fantastic. I do have a fairly good set of technics speakers. Sb7000 with huge woofers.
I bought a Sansui 2000 receiver at the PX in Korea in 1969. I was on a remote mountaintop radio site and ran a pair of speakers from the Quonset hut up to our radio shack so we could listen while working. One night a thunder storm rolled through (seeing lightning coming up the side of a mountain WILL make you a believer). That blew an output fuse and that is never a good thing, I pulled it apart and found at least one output TO-3 had shorted. I wrote Sanui in Japan explaining what happened and asked them to let me know how much it would cost to buy a pair of output, drivers, and a schematic so i could send them a check for the parts. About a week later i got a smallbox with all the parts, a service manual a phone number in Japan to call if I had any problems fixing the unit. I was very happy with level of service they provided me.
I just went through a 1978 2300 Sanyo receiver for a buddy. He got it off Ebay and paid more than I think it was worth but it was in A-1 condition, the wood case and front panel was in perfect shape. One ST-078 power output was blown and i replaced a few suspect electrolytics in the power supply and cleaned all the controls.
These old receivers sound great when you restore them and build quality is very good compared to what you see these days
Thank you for not uselessly rec(r)apping this beautiful unit
I think mine needs a cleaning, too. Watching your video made me realize I could do it myself. Thank you 🙏
I have a 771 I’ve loved for years and today I brought home a 9090 I can’t wait to get it set up.
16:30 When I saw that reddish orange glow of that switch arcing, I thought boy, that 12voltvids scrolling signboard looks just like flames as it shines through the chassis. Come to find it was a fire! Holy Crap! Magic smoke indeed, LOL
This! Exactly!
I absolutely love this thing! I don't know how am I going to pay for it but some day I'm gonna get one of these This is how a stereo should look like and sound like.
That high-end vintage stereo receiver is *45 years old,* and the IF is *still* spot on. I'm amazed you didn't have to realign it! They don't make stuff like that anymore!
Yup and all the capacitors i tested have lower esr than many new ones.
WoW...nice! I got decent oldies (70's), a BLACK (rare)Marantz 2385 and a Fisher _Quadraphonic_ 4 channel Receiver, cool feature is the joystick on the front panel you can swing the channels around the room... Used to work @ a Vintage Stereo Repair Shop, mainly McIntosh, Marantz, H.H Scott, etc also sold Magnaplaner speakers (flat), got those receivers from non-pickup and notified
Man she's a beauty! 👍🏾 I would love to have this in my HiFi audio setup.
I see these going for 2 grand. I was offered 1000 for it about 9 years ago and I laughed at the guy that wanted to buy it from me. He did give me 500 for a technics slp50 which he turned around and sold for 700 the next week at his vintage stereo shop. Kicking myself for selling that cd player. It had been a 4000 cd player when new.
@@12voltvids It is very very similar in various visual ways to Sony of the time. Vertical boards, enclosed tuning capactor, color and styling of boards, tuning string and mechanism, heat sink, lamps. It is quite obvious one of them was chasing the other, or they did so mutually. Even the bar A.M. antenna they both had going on just like that. Same speaker terminal styles, same style FM connectors, same 5 pin DIN - I mean I guess it was more than just these 2 companies and it was the times, but still! Your video made me look at STR-7065 and see about it more than I knew already. heh heh Any tricks for getting the tuning string unstuck? I never use radio but would be nice to make it rock well again anyway. It gets stuck at a certain spot or two, and you can see that it is in the part right exactly behind the dial itself, on one of the wheels. I am thinking to clean the string itself along with the wheels with a dry paper towel. I don't really know though.
Thank you for sharing this video you really know your work wish I could find someone to trust to go through my 9090 Sansui.
Remember these old receivers are really simple compared to modern stuff. Vacuum tubes even simpler. You'll find a few TH-cam channels where techs specialize in tube gear and don't venture much into solid state. Why, because they are very simple. High voltage but really simple and easy to understand. Early solid state are also relatively simple too.
Thanks for sharing!
I also have one which I bought brand new in 1978.
Purchased at Sun Stereo in Berkeley Ca. for $399!
Used to have a set of Sansui SPX-7500 but had to sell.
Recently bought a set of Sansui SP-X9.
Have always loved the sound of this receiver!
Mine is running hot so need to do some repairs.
Thanks and enjoy!!
Mine runs pretty warm too it's biased a little bit hot but hey that improves the sound
Purchased one of these back in 77 while stationed in West Germany. Best receiver ever. Left it at my mom's house after being shipped to Korea, MY MOM GAVE IT AWAY. I wonder if that is my old one. You nevet know.
Love the comment "...these things go for stupid amounts of money". I have a few vintage pieces and can relate. I've, so far, avoided that part of the hobby by choosing to stay away from the popular, well known high wattage pieces. The pieces I now own seemed to have found me rather than me finding them - although I do find myself to be on the lookout for stuff all the time. I grew up with my dad owning a lot of Sansui gear as well as a killer Sony deck and one of the first Mission CD players... This video was excellent!!!. I really enjoy all the details and your very down to earth, straightforward approach. You have the knowledge base to cut through all of the audiophile nonsense out there from people that get wrapped up in the craziness of marginally if even noticeably better performance claims for crazy amounts of money by listening to people who haven't got the necessary technical knowledge to discern fact from fiction. Anyways - I always learn something valuable from your videos. Great stuff!!!
You don't need to spends bug bucks to to get good sound. Aydiophools on the other hand i have found are many times old guys (older then I am) with too much money and ears well past their prime.
I believe that you have a 9090 there. The 9090db had a problematic board for dolby that had islets for the double sided board. The solution is to add a wire jumper in each islet. I own two 9090's not DB's with the same light issues and had to just wire the dial lights on all the time contacts too burned. I ran a service center for Sansui at the time when these were new.
Could be. I was always under the impression that the db model had Dolby FM, which this does.
@@12voltvids yours has jacks on the back to plug in a Dolby Unit. There's not a dolby board in there. The selectors on the front simply activates those jacks.
@@ChartRecordsFan
No that is for the 4 channel Dolby FM board. There is a seperate button that activates that. In the out position it is Dolby FM and press that switch and it activates those jacks on the back. It's for the front channel return. The rear channel went to a seperate amplifier.
@@12voltvids look at pages 19 and 23 of the operators manual. It explains the Dolby/4 ch connections and switches.
@@ChartRecordsFan don't have and don't feel like looking it up. I just turn it on and listen.
I recently restored an AU 717 and AU 517. I had a 7070 back in the 70s hooked up to Infinity Qb speakers. Love those 1970s Sansui electronics
Had a Kenwood KR-9600 for years.....very good receiver too @160watts per ch. Sound was excellent (very good tuner)
Worked on one not too long ago. Had a shorted main cap. Definitely a beast.
Nice, I have the black edition 990db, sounds great!!! perfect working condition!
saw that they made them for Europe recently .
We enjoy that so often you can inject some humour into the vid.s you share! Cheers! B.
Beautiful !!
I like that policy you have. "Every month you leave it, it goes up by 50 bucks."🤣👍
We used to do that at the shop too. People would bring things in approve the estimate and then once it was repaired it would sit in the shop for a month or two before they come to collect it. We would phone literally every two days to remind people to come and get their VCR or their stereo and some would just leave things sit. So we started charging a storage fee. I think it was 20 bucks a week that's what we charged and that got people in to pick their stuff up.
I'm sure he couldn't afford to spend several hours repairing soldering and buying new parts testing everything and then just give away his work..
I have the Sansui AUG 99x which I bought in 1987, love it. Will never get rid of it. Do not know what will happen to it when I am dead in 30 or 40 more years. I hope my equipment goes to someone with some damn common sense and not sell it. What I am hating right now is the issue of Right-to-Repair. If this was how electronic companies back then performed business our equipment would never have been made. Can you imagine that? Such beautiful equipment with amazing sound not being alive today.
I had a early 80's Sansui receiver I was given it from my uncle,my grandparents bought it for him new, anyways in the late 90's it got knocked out by lightning that is why I now have a Kenwood vr505, which I really like but if my Sansui hadn't gotten damaged I'd still be using it..
I'm also an old consumer electronics technician. I've been at it since the 70's. Done TV repair and allocated the audio duties in most of the shops as well as my own shop when I had it. I've worked on many Sansui's. Mainly the G series as memory serves. The Drive Board Shield should be replaced (if possible) because it serves two important functions. First and foremost it gives the drive board physical integrity. The socket in which it's placed can lose electrical contact intermittently. If the socket becomes cracked, or the drive board is stressed in any fashion, this may cause the amplifier to fail catastrophically. The socket has been known to become brittle due to age and heat which further exacerbates the issue. Second it serves to shield the small signal section from RFI as well as 60 HZ issues. As good insurance all the small electrolytic capacitors on the drive should be replaced while it's out. Avoid pulling and pushing it back in too many times because of the above mentioned issues.
Well i don't have it. I don't recall if it was on when i got the amp or not. I think not. I only know if its existence from servicing other amps the same. I was not the first to get into this. The first was a shop that gave a huge estimate. It was then brought to me and I repaired. I believe I was trying to get 200 for it all in and the owner bitched and complained (through my cousin that brought it to me) so we agreed that I would keep it. Glad i did.
@@12voltvids I thought as much. As long as it's not bumped around too much, and there isn't any kind noise induced, I'm sure it'll be okay. I should look around for these old units. I had no idea they sold for the kind of money you mentioned. I enjoy your channel. It brings back memories.
The best time to buy these was in the late 80's people were dumping all this 70's hifi stuff at garage and this was long before ebay and the internet came along, I paid $20 for this receiver at a garage sale.I had so much 70' stereo gear my house literally looked like a hi-fi store. In total, I don't think I ever spent more than $1K on all the gear I bought.
I bought all mine in the late 90's early 2000's before the craziness...
A coworker mentioned the controls on his old receiver were crackling, and audio would cut out randomly on each channel... would I be able to repair? He mentioned it had a 120/240 V switch inside. I really wondered why that would matter, or why he would know. Anyway, I said sure bring it in, and I'll clean the controls in a few minutes, and you can take it home. Days later, on the back seat of his car, buried within a half a dozen couch pillows was a Sansui G-9000 that looked like the day it was made!! That car could have rolled ten times, and his Sansui would have been unscathed. Once I took the cover off, I told him there was no way I could do this in a few minutes as I had first mentioned. I took it home, dismantled to pieces on the bench, and cleaned and checked everything. Not a mark on it anywhere. 10/10 condition and operation. I was simply astounded how well he looked after it. Then I learned an amazing part of the story (and why he knew about the voltage switch). He had purchased it new in Montreal, maybe around 1977, shortly after immigrating from Nigeria. In 1986, he returned to Nigeria to deal with family matters, and brought the Sansui G-9000 to Nigeria, where it had to be operated on 240 V. He told me when he returned to Canada, the only thing he brought back was the Sansui G-9000 ! Amazing this receiver did a return trip from Canada to Nigeria, and there is not a nick or scratch or bent control shaft... nothing. He has since retired, but he still tells me how happy he is with his beloved receiver working properly.
My oldest brother had a Sansui 9090DB and a pair of Technics SB-7000A's back in 1977 when I was 13 years old. I've been hooked on HiFi ever since.
that sounds like me to a tee very cool just like mine
Sansui 9090 DB receiver
Pioneer CT-F750 cassette deck
Kenwood GE 1000 Graphic Equalizer
Technic SL-DL1 Linear Arm turntable. (Needs work)
Bose 301 small speakers
Sony SS 870 speakers
All bought in Okinawa at the Kadena Air Base exchange in 1978. The 301s wore out years ago. Currently running 501s. The turntable needs the drive wheel replaced. And I wish I could find a good tech to clean the controls properly on the 9090. Have to wiggle and jiggle sometimes for popping or drop off. But not too much.
I just last weekend got the Sony speakers back from a friend who had held them for me for 40 years. They are so big, I didn’t really (still don’t) have the room. But she is remodeling so I had to go get them.
Today I played some Pink Floyd and Fleetwood Mac for my 10 year old granddaughter. She hadn’t heard them before. I use an old iPad with a cracked screen as my music input in the auxiliary. With Amazon music.
She HEARD them today. The Sansui and the Sonys were rocking!
All these years later, the quality is still there. You don’t see gear like this anymore. I didn’t know what I was buying. Just bought more than I could afford. The exchange would have factory reps there to talk up the gear. Guess I did alright.
50 us in Uk, Europe and Australia. A good friend of mine has a large Trio / Kenwood Tuner-amp bought by his father in 1971
Now that's a beauty for sure! Always loved the good analog tuners too. May have to eventually track one down myself.
Not this one due to price, but I also wouldn't need that much power
The 6060 is worth a look, & really, the 9090....awesome unit, but do you really need all that power...my 6060 ...got the looks, sound & cranks loud enough when the neighbors aren't home 👍
@William Schwartz classicreceivers.com/category/receivers/sansui
@William Schwartz yeah, I had no idea there were that many different Sansui series of receivers, I gather the 881, 771, 661 models are largely overlooked but as good 👍
I’m commenting early but I know you don’t believe in total recaps but....this unit certainly does deserve all new fresh capacitors!! Ok back to the video. Very excited lol!
Actually it doesn't. Sounds fantastic.
Recapping is overrated by serviceman hungry to make money, uneducated amateurs that believe everything they read on the internet and DIY that have no idea what they are doing. I could make a ton of money just changing out capacitors. When they are leaking or esr has gone up then yes but all the ones I tested measured as good as a new one, and I checked others off camera. They all tested good. The listening test proves that they are fine as the sound is punchy and crisp.
When I first clicked on the vid, I thought boy I hope he isn't going to just shotgun replace the caps in this. So glad you didn't. I own 4 G 9000s and theyall work fine after all these years.....I just rotate then in service through the years. Nothing sounds better! Great vid.
Anybody can change caps and amateurs do because they don't understand how they work. The reason a capacitor fails is either because it wasn't manufactured properly, or damaged during install or was run beyond its rated voltage or frequency. Caps made in the late 80s and throughout the early 90s were problematic due to chemistry changes to make them more environmentally friendly. In the early 2000s many power supplies failed due to designers using caps too close to their rated voltages causing them to overheat. I tested many of these, even though i only showed on camera measuring 3, I did Infact check several others and they were all well within spec so i left them alone for now. The sound is very clear and punchy. Changing to modern caps will definately change the sound and not necessarily for the better because newer caps will have different chemestry which will impact sound. I did a recap job years ago on a big marantz amp. Client supplied expensive audiophile caps and paid me 100 to change. A few days later he returned and paid me 100 to put the originals back because he didn't like the sound. Felt the then 40 year old caps sounded more natural and that was what he was accoustomed to. So I made 200 for doing nothing basically.
Wow that's a loverly amp/tuner :-D
The power transformer is just massive, what a monster :-D
A possible mod to save the lighting switch could be a mosfet and a couple of resistors to switch the lights and save the switch.
Worth thinking about dave.
Well now that i have tensioned the contact it should be good for awhile. Led lights would also reduce the current through it.
@@12voltvids Yes leds would be a good improvement, but they are rather directional.
i sanded some leds to scatter the light in my mates tensi (akai), sanding made a hell of a difference.
I added a regulator and preset so he could adjust the lights to his spec.
He was stunned by the lighting quality, i was just happy to help a good frend.
@@zx8401ztv use led filaments, problem solved
Very nice Sansui
Very Good , Greetings from Poland.
Thanks just fixed my 9090 dB i thought it had dolby disease. Just needed pots cleaned the ones way in the back .
Please hang on to this receiver, keep it in the family!
good machine good sound
One thing I find one these Sanui's from this era are the fusible resistors. All mainly in the power amp section, find that they just go open , or grossly out of tolerance. Working on a 9090 right now with one channel humming , to find R 30 (390 ohm ) open . Then found R39 and 40 (10 ohm) open , checked the rest of the fusible resistors , and out of spec. And recently did a AU-117 , 14 resistors where bad , and all the transistors were good on both units.
my 1977 Sansui 9090db and my Technics SB 7000-A speakers still works but it needs love I have done my own cleaning control pots my patients aren't as used to be I need to get it done by me or another mabe my brother he said we could but distance is a factor and so money is too thats why techs like you haven't touch it since the 1990's when one fixed new volume pot new driver board all new heat sink transistors back when prices was doable, can't imagine a full restoration to do that 2grand to pay off tech efforts specially dolby section mines been to many new years eve parties its been on the road as much as Willie Nelson 9090 and my Technics SB 7000'a speakers that i'm very proud of , metric size not quite 15inch big sound Ted Nugent had bunch at some live venue saw the pictures 40 if memory is right 20 left 20 more right still haven't found same picture hifi magazine in late 1970's another magazine had John Belushi had copy of my whole rig in his apt. made me even prouder new I had a killer system.., you got lucky getting yours even cheaper than mine was a christmas sale 1977
Friend, thanks you for indication. I have one 9090 with the same problem.
In Brazil, professionals who understand these devices are rare. There are the "curious ones".
Will be one repair make by myself.
Again, thank you.
These old designs are really not that complicated. Tube gear even easier. Once digital gets involved they can get really complex. Even i shy away from those.
A Sansui 9090DB was the first set I ever heard rock n roll through. It belonged to my Uncle and now I own it. I've had it serviced once, but the old heads that know how to do this have since retired. So I went searching and found this. Thank you from the bottom of my heart.
Yes I have long since retired from the service business as well. Left in 2003 asbi could see the way the industry was headed and didn't want to be the last one out. Got our when i we're still young enough to retrain and go into a second career that the phone company. I'm now getting close to retirement from that career and I just tinker with electronics now to keep the mind Sharp and I'll continue as long as I can for as long as people still want me to fix their stuff.
WOW man......keep that baby alive and in your arsenal of toys!!!!!!
Years ago, my friend sent this Sansui 9090 to the local agent for repair. What happened was unbelievable, the agent had "lost" his set and was given a 6060 in return. The 6060 had a bottom cover which was a sheet of aluminium with no holes. The set was not working as well. I guessed that the service guy was up to some monkey business eyeing the 9090.
Worked on a 9090db a few years ago. Gave me a back-ache moving it around on the bench.
Well, it does weigh in about 55 lbs
I got a kenwood kr 3010 from 1979 to 80 from German ebay spares or repair its had a drop at some point i reckon ,bass pot shaft is slightly bent as is the shaft for tuning dial not to bad biggest problem is the volume pot is damaged its not smooth at all and needs replacement as it is damaged i will remove and try and see if i can take apart and sort it .this unit is only 27 watt per a channel but sounds good i bought as parts to fix my dads amplifier receiver but got confused somewhere along the line wrong make and model but it is to good a little work and i will keep it .Your sansui looks like a nice unit quite a powerful receiver .
Dave....This receiver sounds awesome. I’ve seen Sansui stuff listed on eBay and never heard of ‘em. I am in the midst of wanting to get a retro stereo system w/ a graphic EQ....looking to go a little nutty and do two pairs of speakers & two pair of subs.
Skip the subs. Just get good speakers
@@12voltvids I would said same thing but a nice pair really rocks the house I picked up a pair of klipsch not top of the line but ok in my book amazon $150 apiece
Sansui's GOLD era .... What a tank. I have a a Seven model (before this series) and .... construction is NO EXPENSE, chasis is all copper plated inside. The only thing this amps need to be taken care off is fresh caps ans inspect for corroded components because the infamous glue of death (more on the 717).
So Sansui also had problems with the glue just like Teac?
I have the seven and the 5500 like them both, the 5500 is rated at 42 watts per.
Cheers
i have two sx 1280's and one sx 1980. the first 1280 my dad bought in 1997 for $50 from a guy he did a job for. the 2nd 1280 i got from ebay about 8yrs ago for $750 came with the box & is in excellent condition. only thing that was missing was the owners manual. the 1980 i got from ebay about 4yrs ago for $700 it was a little beat up and was missing some knobs and one of the bass controls were broken off. i probably have about 8 or 900 in it after buying the parts for it which is still a good deal. also some of the heat sink fins are broken off. trying to figure out how to fix them.
i have one that i brought in japan 1978 in the air force....stopped working 5 years ago, still powers up ,but no sound,it was king of stereo wars on base
Recently picked up one of these and the speakers also. Had the same problems with the switch contacts. Thank you for this video! I am getting a little static from the volume control. Any suggestions as to what I can do to remedy that?
I had a Sansui 4-channel in 2007 I bought from a record store for $50 and got it home and noticed there was no headphone jack ! I wish I would have noticed that before I bought it, but $50 wasn't to terrible for it. The thing is, I only got $25 for it on eBay, so I ended up losing $25 on it. I'm sure it would be worth at least $300 or more today.
Don't be so sure about that. eBay is a money laundering site. These vintage amps you see selling for big dollars mostly don't even exist. It is a way for organized crime to move money around and create a paper trail so it shows as clean money. The fees that eBay and PayPal charge is the cost of doing business. Looks like legitament sales transaction when on fact they were shipping bricks or books around in boxes to complete the illusion that something valuable was shipped.
It gets the public thinking that these old stereo components are super valuable and people post them and wonder why they don't sell for the huge dollars that shows in model sales history. There was a documentary done about 6 of so years ago showing how they do it. Anyway that is why your receiver gets no bites when sales history shows multiple units if same model selling for a few grand. I see people put stuff up on Facebook at redecules prices initially and then they start dropping the price till someone finally bites. The dhr1000 that i bought for 50 initially was listed at 500. The betacam SX i picked up for 100 was initially listed at 1000 then 500 then 300 i offered 100 he wanted 250 I said 100 is max i am going and got it for 100. Then it turned out to be a pal camera. Had i known that i would have offered 25.00!
13:08: Lol, Not to "ME" they don't.....But almost Everything is high now for vintage receivers. That's why I'm glad we had a Goodwill Electronics recycle store here that I still have receivers I only paid $15 and $25 for, until they figured out what people were doing selling them for higher prices and they jacked up the prices on everything. Either way, they're long gone now and I lucked out keeping a couple of them I still use 10 years later
Yes I have noticed. Last good deal i got was a Samsung sv5000 multi system converting VCR for 25.00. I haven't been in there for a long time. I really should check them out. I go through Facebook marketplace looking for interesting things. Just bought a betacam sp broadcast VTR for a good price.
These old receivers were far better built than todays firmware driven models.
Other than worn switches and pots, and dried out capacitors they are very reliable.
At least you can repair them without a lot of expensive surface mount rework gear.
As a young electronics tech in the early 70's, i learnt how to fault find on these receivers.
They were expensive to buy in the 70's now they are very expensive if you can find a
fully working one.
I know how expensive they are today and i have turned down an offer of 1800 for it.
@@12voltvids I would keep it, i made the mistake of selling a load of classic hi-fi when i moved home in 2013, i got very little for it, now the same items are selling for many times more.
You can find an un-serviced one for 1000 to 1500, add 100 for shipping then at least 600+ for a recap at minimum plus a couple more shippings back and forth to the repair man. About 2000+ to get a nice working one on your shelf.
Generally they do not need recapping. 45 years ago electrolytic caps were really made well. They took a dive in the late 80s and into the 90s when the environmental standards and rohs guidelines came into play. These old ones were over spec. 80 volt caps running at 61v. By the 80s they were putting in 64 caps and driving them to within a volt of the limit. Sure I could replace them all, but what will that accomplish when it sounds as good as it does. It will change the sound, no doubt about that but make it better? Not necessarily because modern caps are totally different spec than the originals. If it ain't broke then leave it alone.
@@12voltvids It depends on the unit. I've been through several Sansui G/AU units & some were obviously treated better than others. I repaired a G5500 a while ago (blown outputs) that had been shelved many years ago. ALL the caps in it were fine. OTOH, I went through an AU717 & almost every ecap on the drivers & main PS board were bad, & 2/4 main filter caps were testing >20% low. Another one was cracked/leaking at the + terminal but, ironically, tested within 10%, lol. Then there's the whole glue thing, but that's another story......
I enjoy your videos.......always seem to pick up something from them.....thanks.
Have been recapping vintage gear for years....Think Mundorf, Nichicon KA, Elna Silmic II, Nichicon Muse......It makes a huge difference, especially after a couple of weeks of listening. Caps dry out over time especially after 40 + years.
When they dry out the esr goes up. They all measure good. Some day I will do it but it sounds fantastic. I had it running all day today at good volume and everything sounds fantastic. I have plenty of equipment that is over 40 years old and full of old caps and it all works perfect. Thanking them all because they might fail is a huge waste of time and money.
@@12voltvids It's possible 40+ year old Caps still function.....but Wow with New/Modern Audio caps, selected properly, sound way better. Try it out you may change your mind Dave
@@Sans_Solo_ some day i will do it. It sounds so good as it sits I can't really imagine it sounding any better. You haven't heard this one on the big window shakers.
I did a recap on my luxman hybrid and to be totally honest i was hard pressed to hear the difference. It did fix the phono preamp, those ones were bad for sure but the others I can't say i can hear a difference. Judging by how good this currently sounds I am betting that i won't hear a big improvement. I am sure there will be changes in sound especially is the tone control circuits as that is where most of the caps are, which really won't make a difference because I run the tone circuits switched out with the bypass switch's on. I don't even use the loudness switch. With the big speakers I have they have so much low end as it is.
@@12voltvids If you change the caps someone will be upset that you destroyed originality of it, or you used the wrong brand.
@@marka1986
Ya mean if i put in Chinese caps?!
As the Saying goes - and I hear my dad keep saying this { If it aint broke DON'T Fix it } But wow You really have a beauty there and Sounds Better than the receivers today... Of course now you have to say that right after I just typed it -LOL
Thanks for this vedio. i have an old tube radio how can i test these tubes to detect the faulty one
I have a bunch of Sansui gear including AU888, 331, 101, TU-555 and a QS-1 Quad decoder. Nothing as nice as this 9090DB. Even though I have all this stuff, I spend my time listening to youtube on a Lepai 2020, lol.
I have the black beast. The AU-9500. I brought it home from overseas in 1976, never been touched. Works fine
no problem what so ever. Been thinking that i should have someone look it over. Any thoughts ???
I got one of these given to me by an older lady that wanted some stuff cleared out. It is pretty dusty and a little more scratched up. Guess it was a good deal for free.
Not a bad receiver. People pay way too much for them.
@12voltvids unfortunately, I hooked it up and it has a flashing protect light. I'm gonna have to hit the forums and see what to do.
@@kevinnelson9588 protection light means DC on outputs. Check drivers and output trabsistors. Good luck. Mine was like that when I got it. 8 output trabsistors 4 drivers and several resistors.
I’ve got about 7 of these and about 5 of their DB brethren. However, I think it needs to be noted that they’re value will only go as high as a budget deal will go. So here’s the example. In today’s age, if you’re looking for a well built high wattage receiver, you’re looking at around maybe 1-3k. At this point it’s a far budget friendly investment if you spent around 800-1500$ on a 9090 depending on who or where you buy it from 🤷♂️ the price per watt is definitely better than buying the new Chinese made equipment. And let’s not even talk about the ridiculous prices Mcintosh sells their 60-120 watt receivers for. At that point you’re paying for the brand rather than a fine piece of equipment. 😒
I was given a Sansui qrx9001, no sound in left channel in 2 channel mode. all lights work . Only gets source in tape 2 input, not in aux. lot's of static. Not sure I want to sink a ton of $$ in it, only to have more problems down the line, however the sound I get from the right channel is very good. Suggestions?
I like Sansui receivers.
I have the seven and the 5500
I believe these capacitors age like a fine wine. Unless there are some definitely bad, I leave them alone. I did a total recap once and I regretted it.
That's what i say. If it ain't broke don't fix it. I did the same and swapped them back to the original.
Hi, quick question. I have a kenwood integrated amplifier with 125 watts per channel in 8 ohms, 350 watts power consumption and 110v. I use an AC voltage regulator rated at 500 watts max. I noticed when loudness is turned on with the amplifier and the volume control is at 8 oclock I hear distortion. I hear the woofer popping, my speakers are rated at 6.3 ohms 150 watts and 88db sensitivity. My question is, does the low power ac voltage regulator causes the distortion? I hope you can answer this. Thanks in advance!
Hello, I have the identical receiver every once in a while in FM tuner it will start making a clicking noice canceling out the sound like as if it was out of tune but works fine in all other modes, any thoughts?
I GOT ONE IN MY BASEMENT AND PAID $460 NEW BACK IN 1976, OR 77.
Got a Sansui G-8700DB which is 160 watts per channel, similar story, shorted outputs both channels, 6 burned up resistors on the driver boards which go so hot the solder melted and the resistors wires popped out of the board. driver transistors cooked, slow start 3.9 ohm power resistor open, huge project.The owner bailed and said keep it. Ordered the ON semicondutor T03 outputs from Mouser, but need to find replacements for the drivers. 2SC2238B-LB O,Y and 2SA968B-LB O.Y Finding modern suitable replacements for the drivers is the last hitch holding this project up. Would you know that would replace these? That is the hardest thing about working on this old transistor gear is devices that are not made anymore. Tube gear is so much easier.
That's the problem now with solid state gear. Old semis are no longer made and you can't sub many. Small signal transistor yes but power transistors no.
I heard that you had used different transitors, for your repair. I am doing the same thing on one that I repairing. Did you have to do anything to the bias settings? Thanks for your help.
The outputs were original. 3 of the 4 drivers were also original types. One was subbed because obviously the supplier didn't have the original. I got my dates wrong too. I thought i got this in the 90s but my wife showed me a picture of it set up in our old place and we lived there 88 to 93 so i got this a few years before i thought. She remembers the fight i had over being paid as it was a cousin that brought it to me for his friend. I used it through to about 93 than it was packed away and not run much after then.
@@12voltvids I have the same memory shifts, lol, I check with the former missus, on things going back that far.The onkyo tx-4500 was my first, it is long gone. Enjoy your work, thanks for getting back to me, David.
I have an 8080 and the function selector switch won't lock into my FM function. I was wondering if you have any ideas for me. Thanks
It need full recapping, a proper tech would change the caps etc.
No it doesn't. Sounds great. Been down that road. Did a full recap years ago. Customer supplied audiophool grade caps. Every one changes. Sounded good to me but client was unhappy and had me reinstall all the old caps and wouldn't pay me for the rework. All new caps have a totally different sound that people that are used to the old sound don't like.
Full recap sounds great.
Take a couple hours and lightly sand and refinsh the lid and give it a polish.
Hi there! I have Pioneer SX 737 which makes a lot of notice from left side Chanel, what could be the problem
Cool...
Thanks for sharing. I have a Sansui 9090 that i purchased in July 1976. Purchased it with my first cost of living check from Chrysler. Have not used it in 30 years. Had some kick ass parties with ohm F speakers back then. Tried playing it a few years ago , but it was a no go. Recommend anywhere to have it checked out here in Macomb Michigan?
No have no idea where to get it serviced. Mine came to me dead. All outputs blown. Replaced all outputs and driver transistors. Got in a debate as to how much he was going to pay. I put about 125 in parts into it and the bill was 200 total. Owner wanted to take it and pay me later. I said nope, cash and carry only. Said he needed time to get the funds. I said on 25bs month storage fee. A year later he shows up with 200 and said back to him 25 a month is 300 plus the 200 for the repair. Now it's 500. He said he thought i was joking when i said that. I asked if he thought the bank was joking on the interest they were charging for the parts I had to buy to fix it? Told him it now it goes up 50 a month so he better pay up if he wanted it back. He abandoned it.
@@12voltvids I don`t blame you one bit. You had to put your time , money and effort into it. Now you can enjoy it any time you want. Cash on Delivery. 👍
@@jomama7458 well it was my cousin that brought it to me back in the 80s when it was still relatively young. It didn't belong to him, it was a guy he was sharing a house with. So he didn't have the cash and I wasn't about to release it till I was paid. As far as i know it was from HOT distributers. This cousin was the "black sheep" of the family. Only related by marriage. He was my uncle's second wife's son. Hung out with bikers and such and had a party house. Didn't want to take it to a shop if you catch my drift. Anyway i didn't ask, didn't want to know. All I do know is i put 12 transistors, and a few resistors in it to get it running. It's got plenty of power but it really doesn't sound that good. None of those amps sound good. They all have really high distortion by today's standards and it's the nasty odd harmonic distortion that makes all these amps sound pretty harsh. I'm a tube guy, I like the warm sound of a tube amp. My technics suv9 destroys this one as far as sound goes. This sansui has distortion rating 0.1% my Technics is 0.003. Tube amp is probably closer to 1% but that's even order which is pleasing to the ear. The difference is even order is always an octive higher. Play an A and the distortion is also an A the next and subsequent octives up so the sound blends in and just makes the instrument sound bigger, more like the human ear responds to sound. Odd order harmonics you play an a and the harmonic is a f# or some other note that clashes and just sounds nasty. For big power i use a crest vs900. Now you are talking serious power. 450 per channel into 4 ohms 230 into 8 ohms. I play vinyl through the sansui because vinyl doesnt sound that good to begin with.
@@12voltvids Oh no doubt there were better stereo receivers back in the day. I was very happy with this one back in my much younger days. The fm stations came in loud and clear but the vinyl was only so so at best. Still have them all boxed up also. Pack rat i guess. Also the old Philips 212 turntable. Will still try to get the old set up going again with my newer Yamaha speakers and drive my wife nuts. lol. Good chatting with you.
What would be a few causes for my FM/AM isn’t working
Are they generally problematic? Was looking to get on but after watching your video I'll probably stick with the smaller recievers, less parts to go wrong?
No these are not problematic receivers. I got this one back in the '80s. It came to me from a black sheep cousin. You know every family has one of those right! My cousin not blood but through marriage brought me this receiver it was his roommates. all the outputs were blown drivers were blown bunch of resistors burned up because the guy obviously had shorted speakers or something and cranked it to 12 and roasted everything inside. I rebuilt the unit for him all new transistors couple of resistors drivers got it all working perfect and when it came time to get paid my cousin was like yeah I'll take it to him and collect your money. I said no you give me the money first and then you can have it you're not taking it until I get paid because I don't know what's going to happen he could blow it up again and then say it didn't work and then say I'm not going to pay for it after he's got it so until I'm paid for it it stays here. Guess what I never got paid for it and I got to keep it. I've had several offers to purchase this receiver over the years mobile guy offered me $600 I laughed highball guy offered me $1,700 I said no thanks I'm going to hang on to it. Someday someone will come along and make me an offer that I can't resist and then just then maybe I'll part with it. But then I don't need the money so it would have to be a pretty generous offer even though I don't put much value in the unit I do know what people pay for these things so if I'm going to sell it I'm going to get what people will pay for it I'm not going to give it away.
So my audiophile buddy has just passed to me his "2006 fully restored" 990 Blackface he paid a King's Ransom for a couple years ago (peak ROVID lockdown).. He cannot find any technician willing to risk their wallet to work on it!!! (this is how crazy this Vintage kit ownership thing has become). He's been using it regularly but it now intermittently cuts out on one channel! So i've opened the thing being so damned careful as in setting it out on its own workspace of a really big wood worker bench & bringing my test gear to it... The 1st thing i find is the abomination of what that 2006 restoration was.... The thing's full of soldering iron melted insulation/exposed conductors wires & every pcb solder join has been resoldered BUT there's now WAAAY too much solder on just about every join.... Oh & i'm not happy looking at the state of the Protector Circuit board.... chop sticking the base of the relay & yep... bad sounds. Wish me luck on this nightmare.... incidentally i'm trying to understand how the unit you have here was so blown up, the protector circuit is pretty good for the era so what did someone do?
I have no idea what was done but it was blown up real good. It was brought to me in late 80s and the repair I believe was about 200 and the guy that owned it wanted to negotiate the price. I wouldn't negioate so it was abandoned.
Hi Dave I have a problem of my sansui if the press auto no ca catch signal but mono or manual have a signal what is the problem?thank you for your reply
i would change all the bulbs to led to ease the load on that old control switch
Leds just don't look the same.
Would a short be the reason for the transistors to have been blown? Is it valves that don't like an open circuit.
I have no idea what was done to blow this one up before.
Valves don't care about open circuit. It's the output transformer that cares. Crank up a valve amp with no load and watch your output transformer short.
Just before the smoke I thought I swear I've just saw some sparks or small flame at the top
Changing that meter bulb is a real bitch.
That's why i didn't change it.
Worship the Woodgrain!
Can you service mine it's also the 9090db ? My switches have a lot of static and a light bulb is burnt
I would have at least verified the idle bias and DC offset after all the years and for video demonstration purposes. It would have been interesting to know how much any of that has drifted if at all??
It shouldn't have drifted much if any. Resistors typically don't change their resistance except for one carbon ones when they get hot and this was past the carbon resistor era. I have been enjoying the receiver today in my living room. So much so I might not even get up to shoot a video. Wonderful sound. These caps, 45 years old probably sound as good today as they did when the receiver left the factory. Funny, I turn on the jazz and within a few minutes my 4 legged furry friends join me and just chill out.
@@12voltvids you gotta check the voltages so you can see if your electronic passive components are on the brink of failing. These particular models can stay in operational mode even if the drift is high before the protect clicks on.
@@savagedick1462 no DC offset on the outputs. That was checked previously. One of these days it will be fully overhauled but it really isn't in use as i have much better sounding more powerful system.
hey my friend. i have a denon 2802 avr. it needs an upgrade and no sound coming out the speakers. are you willing to work on it?
Even tho I’ll never pay more than a thousand dollars for that cos back in a days in the 70’s that’s only $150 dollars only fulls will pay more than a thousand dollars now a days.I rather have the money.
Sansui 9090 dB + JBL L-100 Century ( 1977 ).
I like watching repair vids, but I have no idea what this does, can someone explain like im 5 what this item is? :)
Vintage receiver Maranz Pioneer
That's not a Sansui 9090DB, It's right infont of you maked 9090.
I mentioned this earlier. 12Volt deleted my comment. lol. Somebody doesnt like being corrected. You, however, are correct. This is NOT the 9090DB as he stated in the opening. Good catch.
these weren't even available here when they were made. we only had soviet stuff here.
Hi.I have a question I have a sansui 8080db in the circuit board R43 burning? I replace a twice and still burning.
Look for a shorted component in the area.