I always keep my 3 disc Kenwood mini HiFi filled with CDs and cassettes. It helps to prevent dust accumulating on the lens and the tape path, it will accumulate on top of the discs and cassettes instead. It's even worse than this JVC in this regard, because the CD player is on the bottom, and the whole case is full of vents. It has billions of hours in its CD player and still going strong since 1997. It needed a full disassembly - cleaning - lubricating twice, and changing the belts once. I can hear it will need a full recap soon, as the keyboard and display scanning can be heard in the audio, and also motor noise when I change between tracks. I will do it, because I like it, it has great sentimental value to me, and it also sounds good, it has a quite beefy 70+70W RMS output with discrete transistors (I measured 63W without clipping on 8 ohms dummy load, but the output is rated for 6 ohms). The PSU is very underrated, both the transformer and the filter caps. If I crank it up, the +/-50V drops to around +/-30V ! I might do a PSU mod on it, too. It has room for a much bigger transformer and filter caps. If I will go that way, I will probably add a standby PSU, because it uses the big main transformer in standby, it has a whopping 18W standby consumption. A good part of it is probably the heater of the huge VFD, but I guess with a small standby transformer I will be able to drop it to around 5W. The transformer has quite high losses, it is warm even when idle. I will also need to change the output transistors to higher current - higher Pd ones, because the output is probably designed around the weak power supply. If the rails won't drop from +/-50 to +/-30 under load, the original 6A transistors will not be enough. I'm guessing the output power will reach 100W RMS per channel at 6ohms with a solid +/-50V rail. The original transistors are Sanken 2SB1624 - 2SD2493 (110V 6A 60W), the replacements will be Sanken 2SB1647 - 2SD2560 (150V 15A 130W) , they should handle it, but I might reduce the supply voltage to +/-40V just to have some safety margin. A solid +/-40V is still much better than the very weak +/-50V. I will test it with a temporary transformer and a variac, to find out how it performs with different supply voltages, before I order the final transformer. The heatsink is huge, but I will add a silent, temperature controlled fan.
Always interesting to see you work on these old units. Find out what's RIP and if they're worth repairing or even if they are good for parts to bring other units back to life.
Hello another great repair job I was wondering if you can tell me the second and third cd artists you have great taste in music wishing you a very happy and healthy new year and be safe and careful with the virus and the weather all the best jon
I bet it has zero hours. I know the one I bought my kids when they were young never used tapes. Just the CD player. I bet my old one the belts are toast in too. Haven't used it for years but the speakers from it are the ones i use in the shop as bench test speakers.
Yeah these systems are cheepo. Amazing how many brands put their name on cheeeeep units like these. Like you say.... "junk." Made to toss and not to fix most of the time. Cheers! 🍻 -AL
How long does media last on a R or RW CD. Is a USB stick play media well ? What is the longest lasting media for storage outside a SSD drive. Haven't heard there lifespan, the Solid state drives/SSD. Nice job getting the JVC to work, you seem to have worked on a lot of VHS /DVD players ect. I like the older receivers the best. Can play the media into the AUX jacks. The amps on the older stereos are good.** Now all the tube fanatics will say, the tube amps are the best, that's a whole other chapter.
It''s a very headache component system. the CD Mech is having some serious problems on the Rotary Encoder (responsible for Disc Changer and elevated lens mech.) cleaning that part would be better again.
No, the problem is the spindle is bent. The switches do cause issues but this clamping correctly and the disk is wobbling due to bent shaft. Needs new spindle motor.
@@12voltvids i know I already watch the whole video but my point is that compo and the rest of them are a huge pain. Btw nice video. Also a junk compo that's not worth a dollar to fix because it always problematic.
@@12voltvids for the meantime I have so many compo headunits on my workbench and I don't know exactly if i can fix them in working order. So I stack them as a spare parts as well. 😁
Says a lot about what you think about something when you disassemble it with power tools. lmao Did you do any technician service, professionally, like, hired, on any post-2000's tech?
You have a problem with cordless screwdrivers? Got news for you we all used them in the business. No i don't work in the business anymore. I say good riddance. I trained on plasma TV in early 2000s but never really got to put it to practice as I got out before any required service. Not interested in working on modern stuff. Very complex and specialized equipment required. I have been offered a job at one of the few remaining vintage audio shops, a big one at that but i declined. For starters if i were to accept they would most certainly demand my TH-cam channels removal and forbid me to work on side jobs. Just like my current employer. I am not permitted to do side jobs in networking or security systems as that is what i do at my day job. That would be a conflict of interest.
I can't seem to find any of your videos or comments on TH-cam itself. Did you block me or something? I commented on the cordless drill because I was taught to never use power tools when opening anything that *could* be frail or liable to break, that's all. I didn't mean any passive-aggressiveness if that's how you took it. I can see the rest of your comment until you start on about plasma TV's. I don't know if it's a problem on your end or mine, but I can't see any of your responses or videos. Videos are only findable via Google itself.
@@KlonoaTorqueBow no you are not blocked. I see your connect and respond. This was not a drill I use. It is a cordless screw gun and the torque is limited. For really tight screws I have to do that by hand and i have broken a few, by ✋.
@@12voltvids Oh, we have one of those torque-adjustable screw guns at work. Now I see what you mean. Do you think if someone dropped a plasma off and paid like 1300 CAD for the repair that you'd be able to fix it? Hypothetical question, we threw ours out ages ago.
Relaxing Watching ya going through that poor JVC. All the best have a good one.
I was thinking about the tape motor as well, you have taught me well lol.
Some of the main pcbs might be good for part pinching.
I always keep my 3 disc Kenwood mini HiFi filled with CDs and cassettes. It helps to prevent dust accumulating on the lens and the tape path, it will accumulate on top of the discs and cassettes instead. It's even worse than this JVC in this regard, because the CD player is on the bottom, and the whole case is full of vents. It has billions of hours in its CD player and still going strong since 1997. It needed a full disassembly - cleaning - lubricating twice, and changing the belts once. I can hear it will need a full recap soon, as the keyboard and display scanning can be heard in the audio, and also motor noise when I change between tracks. I will do it, because I like it, it has great sentimental value to me, and it also sounds good, it has a quite beefy 70+70W RMS output with discrete transistors (I measured 63W without clipping on 8 ohms dummy load, but the output is rated for 6 ohms).
The PSU is very underrated, both the transformer and the filter caps. If I crank it up, the +/-50V drops to around +/-30V ! I might do a PSU mod on it, too. It has room for a much bigger transformer and filter caps. If I will go that way, I will probably add a standby PSU, because it uses the big main transformer in standby, it has a whopping 18W standby consumption. A good part of it is probably the heater of the huge VFD, but I guess with a small standby transformer I will be able to drop it to around 5W. The transformer has quite high losses, it is warm even when idle.
I will also need to change the output transistors to higher current - higher Pd ones, because the output is probably designed around the weak power supply. If the rails won't drop from +/-50 to +/-30 under load, the original 6A transistors will not be enough. I'm guessing the output power will reach 100W RMS per channel at 6ohms with a solid +/-50V rail. The original transistors are Sanken 2SB1624 - 2SD2493 (110V 6A 60W), the replacements will be Sanken 2SB1647 - 2SD2560 (150V 15A 130W) , they should handle it, but I might reduce the supply voltage to +/-40V just to have some safety margin. A solid +/-40V is still much better than the very weak +/-50V. I will test it with a temporary transformer and a variac, to find out how it performs with different supply voltages, before I order the final transformer. The heatsink is huge, but I will add a silent, temperature controlled fan.
Always interesting to see you work on these old units. Find out what's RIP and if they're worth repairing or even if they are good for parts to bring other units back to life.
Your video's knowledge good tec tips
Hello another great repair job I was wondering if you can tell me the second and third cd artists you have great taste in music wishing you a very happy and healthy new year and be safe and careful with the virus and the weather all the best jon
The tape transport motor most be ZERO hours ready to pull out.
I bet it has zero hours. I know the one I bought my kids when they were young never used tapes. Just the CD player. I bet my old one the belts are toast in too. Haven't used it for years but the speakers from it are the ones i use in the shop as bench test speakers.
Are the JVC 3 Head direct drive capstan cassette decks junk as well?
Those decks were higher quality than this one
JVC knew how to do decks both budget and high end.
The DD-9 is stellar
Yeah these systems are cheepo.
Amazing how many brands put their name
on cheeeeep units like these. Like you
say.... "junk." Made to toss and not to
fix most of the time. Cheers! 🍻 -AL
How long does media last on a R or RW CD. Is a USB stick play media well ? What is the longest lasting media for storage outside a SSD drive. Haven't heard there lifespan, the Solid state drives/SSD. Nice job getting the JVC to work, you seem to have worked on a lot of VHS /DVD players ect. I like the older receivers the best. Can play the media into the AUX jacks.
The amps on the older stereos are good.** Now all the tube fanatics will say, the tube amps are the best, that's a whole other chapter.
It''s a very headache component system. the CD Mech is having some serious problems on the Rotary Encoder (responsible for Disc Changer and elevated lens mech.) cleaning that part would be better again.
No, the problem is the spindle is bent. The switches do cause issues but this clamping correctly and the disk is wobbling due to bent shaft. Needs new spindle motor.
@@12voltvids i know I already watch the whole video but my point is that compo and the rest of them are a huge pain. Btw nice video. Also a junk compo that's not worth a dollar to fix because it always problematic.
@@JaypiTechPHOfficial that's right. I have one if those piece if junk units. Guess what? It's broken too. I use the speakers as my test speakers.
@@12voltvids for the meantime I have so many compo headunits on my workbench and I don't know exactly if i can fix them in working order. So I stack them as a spare parts as well. 😁
What a weird CD loading mechanism
blood spiders love your videos
I heard Lyle lovett
AC motor more reliable compared to the DC, Motor.
Bearings wear evenly in both AC and DC motors.
These CD player now a days not using any more.they Will now using memory card.is It success full what our idea?
I still use CDs in my 200 disc changers to listen to. But I also use memory cards in my car in my portable radio etc.
🤓👏👍👍👍👍
Says a lot about what you think about something when you disassemble it with power tools. lmao
Did you do any technician service, professionally, like, hired, on any post-2000's tech?
You have a problem with cordless screwdrivers? Got news for you we all used them in the business.
No i don't work in the business anymore. I say good riddance. I trained on plasma TV in early 2000s but never really got to put it to practice as I got out before any required service. Not interested in working on modern stuff. Very complex and specialized equipment required. I have been offered a job at one of the few remaining vintage audio shops, a big one at that but i declined. For starters if i were to accept they would most certainly demand my TH-cam channels removal and forbid me to work on side jobs. Just like my current employer. I am not permitted to do side jobs in networking or security systems as that is what i do at my day job. That would be a conflict of interest.
I can't seem to find any of your videos or comments on TH-cam itself. Did you block me or something?
I commented on the cordless drill because I was taught to never use power tools when opening anything that *could* be frail or liable to break, that's all. I didn't mean any passive-aggressiveness if that's how you took it. I can see the rest of your comment until you start on about plasma TV's. I don't know if it's a problem on your end or mine, but I can't see any of your responses or videos. Videos are only findable via Google itself.
@@KlonoaTorqueBow no you are not blocked. I see your connect and respond. This was not a drill I use. It is a cordless screw gun and the torque is limited. For really tight screws I have to do that by hand and i have broken a few, by ✋.
@@12voltvids Nevermind, it was just my cookies and cache not being cleaned in like four years. I can see your comments and videos now.
@@12voltvids Oh, we have one of those torque-adjustable screw guns at work. Now I see what you mean.
Do you think if someone dropped a plasma off and paid like 1300 CAD for the repair that you'd be able to fix it? Hypothetical question, we threw ours out ages ago.
Repairable but not worth it. It's a shame but nothing lasts forever.
These go for 20 bucks at the 2nd hand store.
@@12voltvids yeah I know they aren't worth much of anything these days. Still enjoy watching and listening to you from the UK 👍