Fantastic video that brought my dead display back to life after years of frustration (lost the remote). Such an amazing amp even after all these years. Such an easy and quick fix. Many thanks.
This is the best repair video I have seem, clear in focus video, great schematic details and a pleasure to watch. Great help. Maybe you should take up a TH-cam career.
I remember this piece. I recommended it allot. Allot of fine value for your money. Nice production work here. Unlike others I see with out of focus cameras. Dirty O scopes etc. Your work area is clean and professional. Great!
What an amazing job, your expertise made it look so easy--backed up by years of experience and "deliberate practice" as we educators call purposeful practice activities.
You make it seem so easy, I am very impressed with the quality of this video. Very clear and instructive video taking the mystery out of electronics repair. It is not for the fainthearted, but a great inspiration to those of us that have equipment with issues, and nowhere to get them fixed except by ourselves. I have a couple of Yamaha AV receivers, the RX-V367 with a memory issue, and a DSP-AZ2 that does work fine for now. The memory issue on the RX-V367 might be fixable. Thank you!
Like others have mentioned, awesome video. The display on my DSP-A1 has been slowly going out over the last few years and now has completely gone out. Looks like a nice weekend project and a brushup on soldering is in order. I will take the advice of another poster and try using a smaller soldering tip as well as heating the pins and base when soldering. I sure don't want to have to take this monster apart any more than i have to. This beast weighs a ton. Thanks for the excellent video.
Working on my A1 today to fix the display that goes off once the amp warms up. The board shows cracks in the solder on the power pins and some of the top row letter pins. Soldering later today. Your video has been invaluable and reassuring when a unit like this is in pieces. Many Thanks,
What a fantastic job done by this tidy technician unbelievable, for me I can't even think about it. Great crystal clear video. I still have yamaha dsp ax-ax1 it didn't give me any technical problem so far. Thanks to the audio nature and I appreciate for your video.
Well that indeed was a great video, my own DSP-A1 started to play up the same way just two days ago, at least I can get the parts first before diving into the unit with many screws !, well done sir :) that was a great help to keep my yamaha DSP-A1 working, Philip from England UK
Professionally made video! Very nice work. :) I have the AX1 amp that had similar problems. Apart from the cap I also needed to change the relays that turns L, R and center on/off. Seems like they oxidized internally. The AX1 also have "infinity" volume-knob and input selector using rotary encoders. The lube for the shafts inside the encoders smears out over time and makes bad contact, leading to very awkward behavior of the volume and input selector knobs. You can carefully pry them open, clean the contacts and put together. Still in love with this old amp and nice to be able to keep it going some time more. Good to see other people also think so.
Thanks for the info. After two years of trouble free operation, my center channel has started to drop off every once and a while, and my input selector knob no longer works (have to use the remote). I might need to make a sequel.
Thank you sooo much for a fantastic high quality video tutorial, I have the same problem with my display and have a full set of maintenance manuals, so I am now much wiser with its issue and will tackle this when I'm not tackling my children :)
A highly professional made video. It was a joy to watch, even though my DSP-A1 does not have these problems. I bought it when it just came out in 1998. Oh well there is one issue: Sometimes the left front channel will remain silent, but after on/off it usually comes up. Did not happen often enough to make me investigate the issue. The Yamaha was expensive to buy, but there was hardly ever any other Hifi component that is of such long lasting satisfaction to me.
Awesome video! I myself found a Yamaha RX-V2090 on craigslist for $10 bucks listed as "Turns on,no sound,selling for parts" So I took a shot at it and figured it was just a fuse that was blown but before I did that,I googled the "no sound " issue and it brought me to your video and listened very carefully to what you were saying.Then when you said these magic words at 12:38 "feed in a signal via the Main in connectors" . I did that and sound came out the main front speaker connections in the rear and the headphone jack! Being that i am not a fan of surround sound or pro logic stuff,I am very happy to use my yamaha as a Power Amp! And i'm also thinking that the IC Chip in my Yamaha is blown,eventually i will take it to a shop to get replaced,but in the meantime i'm enjoying it as a Power Amp feeding it with a Carver Preamplifier. Thank You Very much for posting your video,Very Helpful
I purchased my A1 back in 1998 when I was in the Air Force stationed in the UK, it has the same problem with the display, I put it away and bought cheaper Yamaha receiver from Yamaha, and have been using it for a while, I took the DSP A1 back out and hooked it up to my speakers and I forgot how good this amplifier really is, I won't be able to fix the display on my own as my fingers do not bend very good anymore so I will take it to a stereo repair shop and show them the video and see how much will cost to fix it. this amplifier weighs a ton compared to the other Yamaha receivers I have and the sound with the bass is amazing with surround aound. Thank you for posting this video.
I have 2 of these. Both had display problems and 1 also has muted Left and Right front channels that at first was sporadic but eventually became constant. I was able to fix the display only problem by re-soldering all the contacts, but the one with the muted sound problem is just like your DSP-A1 problem. Now I am almost sure it is the same exact problem. Thank you for a truly excellent and professional Video. Very helpful.
Thank you!!! My display would turn off after a couple minutes when turned on and not come back on until it was off for awhile. Soldering all the points on the display fixed the problem. Your video was great in helping me disassemble the cabinet.
Fantastic video ! Great job... I ran across this by accident. I am an original DSP-A1 owner and still enjoy it. Odds are my display has some pixels missing.
Fascinating video. You are a gifted artist and I thoroughly enjoyed watching you work on this beautiful piece of audio gear ! I have one of these units and perhaps I could send it to you for service?
Oh hell yes, they are. Bring your checkbook or bank manager. A cool $43,000 for the full analog setup. Yamaha HiFi is back! www.theabsolutesound.com/articles/yamaha-c-5000-preamplifier-m-5000-power-amp-ns-5000-loudspeaker-gt-5000-turntable
Thank You for this video! Your explanation of the function board chip damage saved me a trip to my service tech. I replaced the SuperCap and the IC and got my amp up and running again. I also had the same display problem but had my tech do that repair but hadn't found this video back then.
Thanks to this I had the courage to remove the volume knob to manipulate the LED to work. I thought it was in the knob itself, connected to a wire. Much easier than I thought. Now the only tiny problem I had with mine is fixed 😀 A tiny issue but I like everything working perfectly on my gear!
I've just sold my 1 to my to brother. Bought it in 1999.For £2000.It was used for movies and music for 22 years . .Everything worked perfectly even the display. It was hooked up to 8 jbl control 1s and some 12inch Yamaha sub.I let the hole lot go for £350 pounds.It now sits in a man cave.It looks a nightmare if it goes wrong.You've got some serious patience repairing that.Great video.
First off, I would like to compliment you on both your craftsmanship and video skills. Very impressive. I have a DSP A1 that has virtually the same issues. I bought mine new approx 18 years ago and have really enjoyed it. I'd like to know if you would be interested in repairing another one, for a fee of course. I recently upgraded to the Yamaha RX-V777BT, but just can't bring myself to throw my old DSP A1 away. Assuming you are in the US. If not, can you tell me how I would go about finding a knowledgeable party to do this type of work. I find folks that talk the talk all day long but when it comes to walking the walk, they can't come through with results.
I did, but it seems simple and daunting. I have had this unit since 98, and I am planning on using it again, for stereo sound. Glad i came across your video. If i may, I would ask some questions in the future. THank you
Nice video. For me, about 50 screws later, I found the memory capacitor on my ancient DSP AX-1 (C175) it had just started to leak its electrolyte, so a lucky save. One bonus of the AX-1 is that Yamaha put a conformal coating on the FUNCTION PCB, so it should be less prone to the capacitor out-gassing and leaking. Mine was hilariously dusty inside, gave it a good clean, it's never had one in the 17 or so years I've owned it :P Looks like new now. I've got four AV amps, I just can't bring myself to get rid of them when I buy a new one. Yamaha all the way, such beautiful construction and attention to detail and that clear, non-tiring sound that keeps me coming back to Yamaha.
@@florinflorin3308 apart from the memory capacitor leak problem, the other two major problems are the input board detecting inputs when there aren't any and the speaker relay contacts failing. Take an RCA jack and whilst playing music put the jack in the pre-amp in sockets on the back, the main left and right are the obvious two, you'll need to plug them in and out quite a bit to clear the problem. The relays need the entire amp taking apart, so do the memory capacitor at the same time...
Thank you Bughunter for this video, my Yamaha dsp a1 unit was bought in 1999 at a cost of P58,000.00, sure a lot of money back then, now i have just fix the display, but i think there is still problem on its memory since it does not rest on its previous configuration as it is being shutdown and restarted anew. You have to reset again the users choice of setting. Surely this video will help a lot in restoring the full glory of this amp/processor for good.
Good video! I gave my sister this amp many years ago and it developed exactly the same issues. I did not replace the audio switch, I just removed the cap and cleaned the corrosion between the pins that caused the problem with the lower display (thus not needing to remove the IC) Many early boards with super capacitor storage suffer from electrolyte leakage which causes corrosion and eats PCB tracks :-(
Beautiful work! Clean and professional! I don’t have professional knowledge off electronics but just a hobby. I have an Yamaha a590 and i have some problems with it but that’s another storry!
Good video but just some things to note, when soldering things like this, don’t use a monster sized soldering iron tip like that, it’s much better to use a chisel tip that’s no more than 3mm across, also to me, it looked like you weren’t applying enough heat to the display pins, you must touch and heat up both the pin and the soldering pad in the PCB, then apply solder, the way you did it you might have dry solder joints in the future, the chip socket is a good touch, that’s what I use to make future replacement easy, an easier way to remove pins left behind af you cut them is to heat up the joint and pull out the pin with some tweezers, easy to clean up the pad that way, oh and on the super cap and the chip, you never made mention to be careful of polarity, it’s very important to install theses things the correct way around.
When soldering on my Yamaha receiver PCB the tracks would lift with very little heat. He may guarding against this. The solder joints may not be as solid and well formed, but they are likely making good contact enough to ensure contact while a little more heat might cause the track to lift and break off.
I just want to say thanks for the great video. I had the same display problem and would never attempted this without seeing someone else do it. While I was very nervous and my soldering skills are amateurish I did have success. I saved a few hundred bucks from the rip off electronics store I reckon.
After viewing this a few time I'm just about to tear down my broken A1 to remove the the display to hopefully fix my other A1 that has been gradually loosing the display over the last 6 months, it was working fun with only a couple segments missing but then it started going off completely from switch on but coming back after a while, I figured it was coming back on after a bit of heat caused the solider joint to expand enough to complete the circuit? But now it refuses to come on. I intend to fully re soldier the other display then swap it into the working unit, do you think I'm doing the right thing ? Could the display fault be caused anywhere else but the display board ? Thanks for posting the video.
Great video presentation! Maybe you might have some input to help me with my DSP-A2070. I've searched high and low with no success. The center channel is full of static and seems to be putting out a peaked level (or at least significantly higher than the rest of the channels). To test, I disconnected all speakers, set it to a ProLogic mode, played some music, and connected the speaker to each of the various outputs. Static comes from center only. I then pulled the channel bridges and routed the center output to one of the main inputs, and sure enough, static. So, it seems to be something with the DSP chip or something else internally. So, I've been trying to figure out how to do a factory reset or otherwise a way to reset the DSP. Any help is greatly appreciated.
Using this excellent video, I fixed the display issue. When I connected my speakers to it, the Left channel did not work. Wha??!!! Both channels worked beforehand. Ugh......
Very impressive !! This is really a great video with very helpful information. Thank you. I do have a Denon AVR 1611 that has the same problem that you have repair in your Yamaha. I mean that some user setting are lost after unplug the unit. This does not happened when the unit is in standby. Do you know something about Denon servicing? Do you know if there is some service manual available for this denon as per your Yamaha? Thank you in advance!!
Hello bughunter great video. I've a dsp-ax1 with other issues and so does a chap whom also commented with similar issues. I have mentioned if I find the route cause then I would assist him with his amp also with a video etc. Basically it had the memory capacitor issue which was a fairly straight forward fix. Took longer to get the part. The main issue I'm having is the front board command buttons don't function which also doesn't let me activate the main speaker relays a+b. The design is different to the A1 you have. it was the slightly boosted version so the chip you replaced is elsewhere or could be different altogether. are you able to help at all with this? amp is too good to scrap and dismantle for parts.
Bought one on ebay... Had it on 5 minutes and the display went out. Fixed that by fixing the cracked solder joints... But the only way it outputs audio is by having an DSP effect on. If I want a through signal DTS/Dolby digital, no audio. The center channel is out too. Can this be related to the IC5 on the function board? I may just return this one back to the guy I bought it from. Plus it smells like it was in a restaurant or something. I wanted one of these for years. I may try another one. The remote I bought for it doesn't work with it either... As it didn't include one.
would it be possible to get the control board schematic, I can't seem to find one, I did a full search on the net and all I found was a partial schematic minus the control board (cpu)! thanks
I have an ax1, mine forgets settings, so I suspect a similar issue. Mine has a different problem, only the right hand channel is sometimes silent until a loud sound comes on, then it works ok.
Really nice vid !! Unfortunately my DSP-A1 has another problem: is shutting down when he likes, sometimes after 10 mins or 5 mins ... Even that bad that it sometimes shuts down after 2 seconds. I tried to put the receiver on with NO speakers connected and it was shutting down after 2 secs again. Brought it to a repair center and guess what: it is playing since 2 days now without any failure ! Any clue which component to check please ? Thanks for your help !!!
Hi, Ive got this same amp thats doing auto protect after about 2 seconds, with no self diag on the display. The service manual suggests the issue is with the power stage, Im getting 230v (uk) volts going in but about half the correct volts from the transformer to the PSU. Any suggestions you might have on where to loos for issues would be great, cheers!
@bughunter Can you (or anyone else) advise re: sourcing the 47000 microfarad capacitor please? That particular component seems to be obsolete now (extensive online searches). Is there some alternative component I could use instead (which would fit onto the circuit board ok)? Thx.
Great video! Thank your for shareing... Just have a question for you, I did the same thing, I ordered two analog switches for to replace the IC5 / IC4..( LC78213 - the sub number on the surface of the swich is different than original ) . Just please, if you can help me to understand, why the volume level went a bit down?When I turn the volume knob in to the usual position, the sound seems to me to be a bit down than before... I replaced also the supercapacitor ( 0.047F ) Thank you!
Hi, thanks for your tutorial. Since you are very experienced with DSP A1 I have a question for you. My DSP A1 yesterday had one of the two surround channel mute. Today also the other surround channel won't work. I tried to force them setting the "Party" mode (all 5 channels on) and increasing the volume. Magically both the surround channel started playing again after a "crack" sound. What can I do to fix this "cold working" problem? Thank you in advance.
Hi Great video!!.....very detailed and well explained.....I have an RX-Z7 and the their are various pixels that are out on the display. I just purchased the correct display board from Yamaha but for some reason it does not have the amber coating on the glass (It's just clear) compared to the original that has this coating so I would lose the amber display look for a white display. Not sure if I want to do that. To further complicate matters all the pins on the original display would probably have to be cut out and all the holes de-soldered so the new on can be installed. I already removed the front panel and have the display circuit board out. I came across your video showing that the display pin joints crack. Could that be causing some of the pixels not to light? I hope so because that would be an easy fix just to go over all the solder joints like you did in the video than to replace the whole display. I have not checked the pins out yet but the unit is 10 years old so that could be the problem. What are the chances of the display being bad compared to the solder joints being cracked.? Thanks in advance!
Hi...is it possible to convert the voltage,from 110 volts to 220 volts,at some internal selector or changing some wires at transformer ? There no external voltagem selector . Thanks
Very nice video and u are so smart can fig out the problem by ur own, I have a Yamaha RX-V2095 almost same as ur Yamaha DSP-A1, now having issues when I switch the unit on and I turn the Vol up to 10% no sound out but if I increase the vol more than 30% the sound come out from all speakers it happens randomly, one thing I noticed about when sound restored I can hear the sound comes a bit weak start with and back to normal normal peak in 2secs , is anything I can do about it? I love this AMP I wish I can keep it forever.
Hallo, i got a question. I know this Video is 4 years old now. But i have an DSP A1 and i dont want to throw it away, and no one could figure out what the problem with this amplifer is. I only got 2 speakers connected and only use the stereo mode. But after playing 1 hour the volume drops ( The same level as i would rech if i press the mute button ) ... and then it goes up and down... like i would press mute and unmute several times a minute... maybe you got an fix or an idea .. if you see this message :) Thank you
Very informative video very professional Yamaha would not like you fixing a old model they would prefer you throw away and purchase a new unit .I have noticed these high end unit are problematic because so many boards are crammed in a small space and expensive to repair .
Fantastic video that brought my dead display back to life after years of frustration (lost the remote). Such an amazing amp even after all these years. Such an easy and quick fix. Many thanks.
This is the best repair video I have seem, clear in focus video, great schematic details and a pleasure to watch. Great help. Maybe you should take up a TH-cam career.
. . . and not only for an audio device, but for any kind of repairs. This is how a repair video should be done. Professional.
Best electronic repair video....ever. Technical explanation and editing work just perfect.
I remember this piece. I recommended it allot. Allot of fine value for your money. Nice production work here. Unlike others I see with out of focus cameras. Dirty O scopes etc. Your work area is clean and professional. Great!
What an amazing job, your expertise made it look so easy--backed up by years of experience and "deliberate practice" as we educators call purposeful practice activities.
You made it sound so simple and with minimal if any test equipment. Well done.
You make it seem so easy, I am very impressed with the quality of this video. Very clear and instructive video taking the mystery out of electronics repair. It is not for the fainthearted, but a great inspiration to those of us that have equipment with issues, and nowhere to get them fixed except by ourselves.
I have a couple of Yamaha AV receivers, the RX-V367 with a memory issue, and a DSP-AZ2 that does work fine for now. The memory issue on the RX-V367 might be fixable. Thank you!
Like others have mentioned, awesome video. The display on my DSP-A1 has been slowly going out over the last few years and now has completely gone out. Looks like a nice weekend project and a brushup on soldering is in order. I will take the advice of another poster and try using a smaller soldering tip as well as heating the pins and base when soldering. I sure don't want to have to take this monster apart any more than i have to. This beast weighs a ton. Thanks for the excellent video.
Working on my A1 today to fix the display that goes off once the amp warms up. The board shows cracks in the solder on the power pins and some of the top row letter pins. Soldering later today. Your video has been invaluable and reassuring when a unit like this is in pieces. Many Thanks,
Dude i started collecting amplfiers and av receivers, i LOVED your video! Kudos for your patience and skill!
What a fantastic job done by this tidy technician unbelievable, for me I can't even think about it. Great crystal clear video. I still have yamaha dsp ax-ax1 it didn't give me any technical problem so far. Thanks to the audio nature and I appreciate for your video.
Well that indeed was a great video, my own DSP-A1 started to play up the same way just two days ago, at least I can get the parts first before diving into the unit with many screws !, well done sir :) that was a great help to keep my yamaha DSP-A1 working,
Philip from England UK
Professionally made video! Very nice work. :)
I have the AX1 amp that had similar problems. Apart from the cap I also needed to change the relays that turns L, R and center on/off. Seems like they oxidized internally. The AX1 also have "infinity" volume-knob and input selector using rotary encoders. The lube for the shafts inside the encoders smears out over time and makes bad contact, leading to very awkward behavior of the volume and input selector knobs. You can carefully pry them open, clean the contacts and put together.
Still in love with this old amp and nice to be able to keep it going some time more. Good to see other people also think so.
Thanks for the info. After two years of trouble free operation, my center channel has started to drop off every once and a while, and my input selector knob no longer works (have to use the remote). I might need to make a sequel.
Nice job! You obviously know what you’re doing. It was a pleasure to watch this excellent presentation. Thanks.
Thank you sooo much for a fantastic high quality video tutorial, I have the same problem with my display and have a full set of maintenance manuals, so I am now much wiser with its issue and will tackle this when I'm not tackling my children :)
A highly professional made video. It was a joy to watch, even though my DSP-A1 does not have these problems. I bought it when it just came out in 1998. Oh well there is one issue: Sometimes the left front channel will remain silent, but after on/off it usually comes up. Did not happen often enough to make me investigate the issue.
The Yamaha was expensive to buy, but there was hardly ever any other Hifi component that is of such long lasting satisfaction to me.
Brilliant video. So very helpful and a you're a superb fault finder. Really helpful to bring my beloved Yamaha DSP-A1 back to life. Thank you sir!
Awesome video! I myself found a Yamaha RX-V2090 on craigslist for $10 bucks listed as "Turns on,no sound,selling for parts"
So I took a shot at it and figured it was just a fuse that was blown but before I did that,I googled the "no sound " issue and it brought me to your video and listened very carefully to what you were saying.Then when you said these magic words at 12:38 "feed in a signal via the Main in connectors" . I did that and sound came out the main front speaker connections in the rear and the headphone jack! Being that i am not a fan of surround sound or pro logic stuff,I am very happy to use my yamaha as a Power Amp! And i'm also thinking that the IC Chip in my Yamaha is blown,eventually i will take it to a shop to get replaced,but in the meantime i'm enjoying it as a Power Amp feeding it with a Carver Preamplifier. Thank You Very much for posting your video,Very Helpful
I purchased my A1 back in 1998 when I was in the Air Force stationed in the UK, it has the same problem with the display, I put it away and bought cheaper Yamaha receiver from Yamaha, and have been using it for a while, I took the DSP A1 back out and hooked it up to my speakers and I forgot how good this amplifier really is, I won't be able to fix the display on my own as my fingers do not bend very good anymore so I will take it to a stereo repair shop and show them the video and see how much will cost to fix it. this amplifier weighs a ton compared to the other Yamaha receivers I have and the sound with the bass is amazing with surround aound. Thank you for posting this video.
I have 2 of these. Both had display problems and 1 also has muted Left and Right front channels that at first was sporadic but eventually became constant. I was able to fix the display only problem by re-soldering all the contacts, but the one with the muted sound problem is just like your DSP-A1 problem. Now I am almost sure it is the same exact problem. Thank you for a truly excellent and professional Video. Very helpful.
Beautifully done. The video and the repair.
Thank you!!! My display would turn off after a couple minutes when turned on and not come back on until it was off for awhile. Soldering all the points on the display fixed the problem. Your video was great in helping me disassemble the cabinet.
Fantastic video ! Great job... I ran across this by accident. I am an original DSP-A1 owner and still enjoy it. Odds are my display has some pixels missing.
Fascinating video. You are a gifted artist and I thoroughly enjoyed watching you work on this beautiful piece of audio gear ! I have one of these units and perhaps I could send it to you for service?
Just amazingly well put together video. Thank you. Great diagnostics too!
what a beautifully built machine! they arent made like this anymore
Oh hell yes, they are. Bring your checkbook or bank manager. A cool $43,000 for the full analog setup. Yamaha HiFi is back! www.theabsolutesound.com/articles/yamaha-c-5000-preamplifier-m-5000-power-amp-ns-5000-loudspeaker-gt-5000-turntable
Thank You for this video! Your explanation of the function board chip damage saved me a trip to my service tech. I replaced the SuperCap and the IC and got my amp up and running again. I also had the same display problem but had my tech do that repair but hadn't found this video back then.
Thanks to this I had the courage to remove the volume knob to manipulate the LED to work. I thought it was in the knob itself, connected to a wire. Much easier than I thought. Now the only tiny problem I had with mine is fixed 😀 A tiny issue but I like everything working perfectly on my gear!
Amazing.
My Technitian managed to save my 1998 Unit from death.
My unit had the same problem, after changing the IC, it came back to life.
Thank you
That is one beautiful piece of kit. Great rescue. Definitely a amplifier worth preserving.
I've just sold my 1 to my to brother. Bought it in 1999.For £2000.It was used for movies and music for 22 years . .Everything worked perfectly even the display. It was hooked up to 8 jbl control 1s and some 12inch Yamaha sub.I let the hole lot go for £350 pounds.It now sits in a man cave.It looks a nightmare if it goes wrong.You've got some serious patience repairing that.Great video.
First off, I would like to compliment you on both your craftsmanship and video skills. Very impressive.
I have a DSP A1 that has virtually the same issues. I bought mine new approx 18 years ago and have really enjoyed it.
I'd like to know if you would be interested in repairing another one, for a fee of course.
I recently upgraded to the Yamaha RX-V777BT, but just can't bring myself to throw my old DSP A1 away.
Assuming you are in the US.
If not, can you tell me how I would go about finding a knowledgeable party to do this type of work.
I find folks that talk the talk all day long but when it comes to walking the walk, they can't come through with results.
Best repair video on youtube. Thankyou
I did, but it seems simple and daunting. I have had this unit since 98, and I am planning on using it again, for stereo sound. Glad i came across your video. If i may, I would ask some questions in the future. THank you
such a beautiful looking amp
Nice video. For me, about 50 screws later, I found the memory capacitor on my ancient DSP AX-1 (C175) it had just started to leak its electrolyte, so a lucky save. One bonus of the AX-1 is that Yamaha put a conformal coating on the FUNCTION PCB, so it should be less prone to the capacitor out-gassing and leaking. Mine was hilariously dusty inside, gave it a good clean, it's never had one in the 17 or so years I've owned it :P Looks like new now. I've got four AV amps, I just can't bring myself to get rid of them when I buy a new one. Yamaha all the way, such beautiful construction and attention to detail and that clear, non-tiring sound that keeps me coming back to Yamaha.
Hi ! I have a dsp ax1 as well and the sound starts after is turn up two half! Do you have any idea what could be the problem
@@florinflorin3308 apart from the memory capacitor leak problem, the other two major problems are the input board detecting inputs when there aren't any and the speaker relay contacts failing. Take an RCA jack and whilst playing music put the jack in the pre-amp in sockets on the back, the main left and right are the obvious two, you'll need to plug them in and out quite a bit to clear the problem. The relays need the entire amp taking apart, so do the memory capacitor at the same time...
The sound of this Yamaha (DSP A2) is awesome. I have one since 1996 and working!!!
Same here
Excellent repair video in it's detail!
Watched full video and i wanna say, its very nice video editing :) would like to see more repairing videos.
Thanks. Now I just need something else to repair. :)
Thank you Bughunter for this video, my Yamaha dsp a1 unit was bought in 1999 at a cost of P58,000.00, sure a lot of money back then, now i have just fix the display, but i think there is still problem on its memory since it does not rest on its previous configuration as it is being shutdown and restarted anew. You have to reset again the users choice of setting. Surely this video will help a lot in restoring the full glory of this amp/processor for good.
You're welcome. Hope it helps. If you have any questions, you can post here... BH
Good video! I gave my sister this amp many years ago and it developed exactly the same issues. I did not replace the audio switch, I just removed the cap and cleaned the corrosion between the pins that caused the problem with the lower display (thus not needing to remove the IC) Many early boards with super capacitor storage suffer from electrolyte leakage which causes corrosion and eats PCB tracks :-(
I never thought of just trying to clean the corrosion. I'll keep that in mind that next time I do this sort of thing.
Thank for sharing. This is beautiful amplifier and it worth to bring it back to life.
Good repair not many people can have this skill to do dsp is one of the top range in the 90s
Beautiful work! Clean and professional! I don’t have professional knowledge off electronics but just a hobby. I have an Yamaha a590 and i have some problems with it but that’s another storry!
Thank you so much for this excellent tutorial.
Great Job Man!
SUPERB VIDEO in all respects... Crystal clear commentary and schematics.
BRAVE, BRAVO, BRAVO !!!
Very good video and very clear presentation and well explained.👏 It helps me indeed with my Dsp-a1.
Pleasure to watch you great video crystal clear explanation PROFI .Thank you for your video.
This is was fascinating. A big thank you for this.
Good video but just some things to note, when soldering things like this, don’t use a monster sized soldering iron tip like that, it’s much better to use a chisel tip that’s no more than 3mm across, also to me, it looked like you weren’t applying enough heat to the display pins, you must touch and heat up both the pin and the soldering pad in the PCB, then apply solder, the way you did it you might have dry solder joints in the future, the chip socket is a good touch, that’s what I use to make future replacement easy, an easier way to remove pins left behind af you cut them is to heat up the joint and pull out the pin with some tweezers, easy to clean up the pad that way, oh and on the super cap and the chip, you never made mention to be careful of polarity, it’s very important to install theses things the correct way around.
When soldering on my Yamaha receiver PCB the tracks would lift with very little heat. He may guarding against this. The solder joints may not be as solid and well formed, but they are likely making good contact enough to ensure contact while a little more heat might cause the track to lift and break off.
Wow that video is soooo well made !
thank you sir, nice video
Excellent job and great video!
Awesome video and repair.
Thank you very much for this information I haven't got audio problems but got display and c21 issues
You are my hero!
Proud A1 owner, Austria
Awesome video! I have was losing my center channel off and on and now its gone completely. Any pointers as to what I should look at first?
I just want to say thanks for the great video. I had the same display problem and would never attempted this without seeing someone else do it.
While I was very nervous and my soldering skills are amateurish I did have success. I saved a few hundred bucks from the rip off electronics store I reckon.
beautiful amplifier
Beautiful video. But 1 question. Do we need to take the dsp board out of the panel ? I am planning to just solder the thing while still in the panel.
After viewing this a few time I'm just about to tear down my broken A1 to remove the the display to hopefully fix my other A1 that has been gradually loosing the display over the last 6 months, it was working fun with only a couple segments missing but then it started going off completely from switch on but coming back after a while, I figured it was coming back on after a bit of heat caused the solider joint to expand enough to complete the circuit? But now it refuses to come on. I intend to fully re soldier the other display then swap it into the working unit, do you think I'm doing the right thing ? Could the display fault be caused anywhere else but the display board ? Thanks for posting the video.
Great video presentation! Maybe you might have some input to help me with my DSP-A2070. I've searched high and low with no success. The center channel is full of static and seems to be putting out a peaked level (or at least significantly higher than the rest of the channels). To test, I disconnected all speakers, set it to a ProLogic mode, played some music, and connected the speaker to each of the various outputs. Static comes from center only. I then pulled the channel bridges and routed the center output to one of the main inputs, and sure enough, static. So, it seems to be something with the DSP chip or something else internally. So, I've been trying to figure out how to do a factory reset or otherwise a way to reset the DSP. Any help is greatly appreciated.
Very good and well done rapair video, thanks.
Great video - does yamaha give out the service manual if you ask? Or is there another way of obtaining it?
Amazing Video..I have the RX-V3000 ..very similar ..switches on and immeadiatly off any ideas???
Using this excellent video, I fixed the display issue. When I connected my speakers to it, the Left channel did not work. Wha??!!! Both channels worked beforehand. Ugh......
Very nice video, very nice explanation e very nice music!!! congratulations!!!!!
Very impressive !! This is really a great video with very helpful information. Thank you. I do have a Denon AVR 1611 that has the same problem that you have repair in your Yamaha. I mean that some user setting are lost after unplug the unit. This does not happened when the unit is in standby. Do you know something about Denon servicing? Do you know if there is some service manual available for this denon as per your Yamaha? Thank you in advance!!
Hello bughunter great video. I've a dsp-ax1 with other issues and so does a chap whom also commented with similar issues. I have mentioned if I find the route cause then I would assist him with his amp also with a video etc. Basically it had the memory capacitor issue which was a fairly straight forward fix. Took longer to get the part. The main issue I'm having is the front board command buttons don't function which also doesn't let me activate the main speaker relays a+b. The design is different to the A1 you have. it was the slightly boosted version so the chip you replaced is elsewhere or could be different altogether. are you able to help at all with this? amp is too good to scrap and dismantle for parts.
Thank you for beautiful video.
Very Clever !! Great Job Thx for share it
Nice video, great execution of the job, I was looking for a socket for LC78213 (30 pin) but it is difficult to find, do you have any advice?
Good work
Bought one on ebay... Had it on 5 minutes and the display went out. Fixed that by fixing the cracked solder joints... But the only way it outputs audio is by having an DSP effect on. If I want a through signal DTS/Dolby digital, no audio. The center channel is out too. Can this be related to the IC5 on the function board? I may just return this one back to the guy I bought it from. Plus it smells like it was in a restaurant or something. I wanted one of these for years. I may try another one. The remote I bought for it doesn't work with it either... As it didn't include one.
would it be possible to get the control board schematic, I can't seem to find one, I did a full search on the net and all I found was a partial schematic minus the control board (cpu)! thanks
Excellent video, thank you
I have an ax1, mine forgets settings, so I suspect a similar issue.
Mine has a different problem, only the right hand channel is sometimes silent until a loud sound comes on, then it works ok.
Brilliant!. Now i know what i need to do. thx.
Видео шикарное. Спасибо!!!
согласен!
Hi, I have a Yamaha RX V667 av receiver with a busted fm coax connector is there a way to repair this myself?
I sometimes hear the rustling in one of the channels. what it can be. thanks.
Magnificent !!
What speakers do you recommend for this unit?
please tell me where you find the schematic of your device?
Really nice vid !! Unfortunately my DSP-A1 has another problem: is shutting down when he likes, sometimes after 10 mins or 5 mins ... Even that bad that it sometimes shuts down after 2 seconds. I tried to put the receiver on with NO speakers connected and it was shutting down after 2 secs again. Brought it to a repair center and guess what: it is playing since 2 days now without any failure ! Any clue which component to check please ? Thanks for your help !!!
Hi, Ive got this same amp thats doing auto protect after about 2 seconds, with no self diag on the display. The service manual suggests the issue is with the power stage, Im getting 230v (uk) volts going in but about half the correct volts from the transformer to the PSU. Any suggestions you might have on where to loos for issues would be great, cheers!
@bughunter Can you (or anyone else) advise re: sourcing the 47000 microfarad capacitor please? That particular component seems to be obsolete now (extensive online searches). Is there some alternative component I could use instead (which would fit onto the circuit board ok)? Thx.
Wow, great work!!!
Great video! Thank your for shareing...
Just have a question for you, I did the same thing, I ordered two analog switches for to replace the IC5 / IC4..( LC78213 - the sub number on the surface of the swich is different than original ) .
Just please, if you can help me to understand, why the volume level went a bit down?When I turn the volume knob in to the usual position, the sound seems to me to be a bit down than before...
I replaced also the supercapacitor ( 0.047F )
Thank you!
Hi, thanks for your tutorial. Since you are very experienced with DSP A1 I have a question for you. My DSP A1 yesterday had one of the two surround channel mute. Today also the other surround channel won't work. I tried to force them setting the "Party" mode (all 5 channels on) and increasing the volume. Magically both the surround channel started playing again after a "crack" sound.
What can I do to fix this "cold working" problem? Thank you in advance.
Hi Great video!!.....very detailed and well explained.....I have an RX-Z7 and the their are various pixels that are out on the display. I just purchased the correct display board from Yamaha but for some reason it does not have the amber coating on the glass (It's just clear) compared to the original that has this coating so I would lose the amber display look for a white display. Not sure if I want to do that. To further complicate matters all the pins on the original display would probably have to be cut out and all the holes de-soldered so the new on can be installed. I already removed the front panel and have the display circuit board out. I came across your video showing that the display pin joints crack. Could that be causing some of the pixels not to light? I hope so because that would be an easy fix just to go over all the solder joints like you did in the video than to replace the whole display. I have not checked the pins out yet but the unit is 10 years old so that could be the problem. What are the chances of the display being bad compared to the solder joints being cracked.? Thanks in advance!
Very informative and educational. Very detailed and precise. I learned a lot of shit
Do you know where I can buy a replacement display..?
awesome, thank you !
I have a similar problem , Surround sound works normally , But without effect almost no sound The problem is whether it will be in this chip ?? Thanks
Hi...is it possible to convert the voltage,from 110 volts to 220 volts,at some internal selector or changing some wires at transformer ?
There no external voltagem selector .
Thanks
Very nice video and u are so smart can fig out the problem by ur own, I have a Yamaha RX-V2095 almost same as ur Yamaha DSP-A1, now having issues when I switch the unit on and I turn the Vol up to 10% no sound out but if I increase the vol more than 30% the sound come out from all speakers it happens randomly, one thing I noticed about when sound restored I can hear the sound comes a bit weak start with and back to normal normal peak in 2secs , is anything I can do about it? I love this AMP I wish I can keep it forever.
Hallo, i got a question. I know this Video is 4 years old now. But i have an DSP A1 and i dont want to throw it away, and no one could figure out what the problem with this amplifer is. I only got 2 speakers connected and only use the stereo mode. But after playing 1 hour the volume drops ( The same level as i would rech if i press the mute button ) ... and then it goes up and down... like i would press mute and unmute several times a minute... maybe you got an fix or an idea .. if you see this message :) Thank you
Bello come lo smonta YAMAHA DSP A1 🔝🔝🔝🔝🔝🔝
Very informative video very professional Yamaha would not like you fixing a old model they would prefer you throw away and purchase a new unit .I have noticed these high end unit are problematic because so many boards are crammed in a small space and expensive to repair .
Great job pal!!!