Would any of those caps you changed affect tweeter performance? I just scooped a pair and already know the caps need changing.
@HomeTheatre1019 ай бұрын
Update: New electrolytic caps improved them drastically! ✅🍿
@jameselrick66987 ай бұрын
Could you possibly send me a guide on how to replace the electrolytic caps. I just recently got some TF700's and wanted to get it recapped as it's been sitting for a long while in a studio. Thanks!@@HomeTheatre101
@DanielFoley75 Жыл бұрын
I recently found an old JVC-400 receiver for cheap. Everything was working when I got it. The other day the LCD screen went dark. I am handy at refurbishing electronics but this one is complex. Is this a common problem? Any idea on how to troubleshoot and repair?
@Disabled-adventures2 жыл бұрын
i dont get why you dont show the work part, you just show after its back together, which i get why , you need a camera man or some way of holding the camera, cool vid otherwise. im really green and want to learn
@sebamariano2 жыл бұрын
I have a receiver that turns on and does not emit sound, if I increase the volume with the control it makes pac at each touch. I have no idea about electronics, but I was researching and it has transistors 2SB1429 first in green and 2SD2155 in black, I'm afraid they are burnt and are no longer available.
@gozzyfranco14902 жыл бұрын
Hi I have a JVC RX-6010V is no audio or signal.. Then another DENON AVR-1000 GOES PROTECTED..HOW TOreset it.
@TSUTENKAKU0072 жыл бұрын
I have the same preamplifier. I decided not to modify with different part. This preamplifier was made back to deliver certain tonal characteristic back when it was made with the parts available that period. If anyone changes parts, that particular sound charateristic will be gone for good. I know by upgrading with today's higher quality parts will make the preamp sounds much more sharp, clear, precise and overall better but that's not the original sound the originally creator intended back then. The only part I will consider modifying is upgrading the power supply with better rectifier and 3 cans of electrolytic capacitors for safety reason.
@deadmusik99692 жыл бұрын
I have a JVC AK300 where the right channel intermittently going in and out, any ideas? It will self correct if i turn the volume up or in a couple hours it will turn on the right channel, not even the VU meter shows any output, is it in my pre amp section?
@hermitsgrotto38122 жыл бұрын
Thanks .
@rogerhelland74243 жыл бұрын
Were any of the capacitors marked wrong on the 2220 amp board?
@01sapphireGTS3 жыл бұрын
Hello OldTechFan: What sonically changed with the capacitor upgrade? What is the "best" capacitor to use for the "best" change/upgrade? I see people use Russian paper-and-oil caps is guitars and guitar amps, etc. There has to be a Holy Grail cap for speaker crossovers. Thank you in advance.
@abhiv55143 жыл бұрын
That volume controller/pot looks brand new. i need one for 2220B, where did you get those?
@abhiv55142 жыл бұрын
I bought one on ebay.
@roberte.andrews46213 жыл бұрын
How about 42 years without repairs? My Marantz has been just idling, diving a pair of very efficient speakers to concert levels (1 watt input=102 decibels @ 1 meter) Dust-off and de-oxide controls is all I've done and, oh yes, LED display lights to reduce internal heat and reduce power consumption. I'll keep you in mind, should I experience trouble. Knock on wood! Good video, though.
3 жыл бұрын
there should be AAAhM an algorithm AAHMMM to erase AAAHM many AAAHMM times the AAAHMM you AAAHMM AAAAHM say!
@CybershamanX3 жыл бұрын
(2:45) You can also see one of the infamous DCM aluminum core inductor coils here. Seems that aluminum does indeed have some slight ferrous properties. Just enough that Steve E. and crew would use it when an air core wasn't enough, but an iron core would have been way too much.
@CybershamanX3 жыл бұрын
Yeah, they sure went nuts with that adhesive! I'm currently rebuilding two Time Window 1A crossovers which I will be mounting in shadowboxes so you can admire the engineering. The thing is, I have to use the original inductor coils because I think they were hand wound. It would be impossible to find ones off the shelf that would match exactly. But, man, that glue! Fortunately, the 1A crossovers aren't as crowded as the TF-700s were. It pops right off with a knife. I guess they saved a lot of labor by gluing every damn thing together (which they couldn't really do with the backs of the 700s), but it sure makes DCM speakers a PAIN to work on. Again, thanks for uploading this! :)
@CybershamanX3 жыл бұрын
(4:17) It depends on what kind of driver it's connected to. If they used a different one later on that is probably what warranted the value change. Steve Eberbach and company pretty much flew by the seats of their pants back then, so it would be interesting to see if they swapped out a driver for a different one. Time Windows come to mind, when Phillips stopped making speaker drivers and they switched to Vifa (now Peerless/Tymphany). However, it's likely you won't notice such a small difference without actually measuring the frequency response, so it's all good. :) I had these exact speakers in the late 80s and even had the backs off. Very cool to see the inside again. Thanks for posting! :)
@sleepyoctopus3 жыл бұрын
Any change of providing an update to your project? I'd love to see the restoration.
@johnhifivintage45394 жыл бұрын
Hi,nice job! have a problem with my amp...can you help? tanks kzfaq.info/get/bejne/nbWTZ5xev9bFdnU.html
@roberte.andrews46214 жыл бұрын
It saves a lot of time and expense to consult the factory repair manual. Some of these circuits are Saul Marantz's patented designs and don't respond to DIY treatment. Good luck!
@delphygeorge33184 жыл бұрын
U have jvc spair parts avalible
@delphygeorge33184 жыл бұрын
Jvc home theater spair parts avalible
@bshef34244 жыл бұрын
sweeeeeeeeet.......found a 2215b that needs exactly this same treatment...thanks for sharing!
@johnlewis98954 жыл бұрын
wondering what to use for transistor replacements for both the drivers on the main baord and the transistors on the preamp and phono boards. I have 2220 and am doing the caps and transistors
@gulbynas4 жыл бұрын
What could be wrong with my marantz ? You can see on video how it's acting cutting off sound kzfaq.info/get/bejne/mtRonZOkrLS-lGQ.html
@BurtBowers5 жыл бұрын
I have a jvc digital stereo receiver R-X220LR I am getting no sound at all now was getting sound from one side little from other side speaker though now none, I rebuilt the speakers so it is not speakers wonder if you know what it could be? I had opened it up & blew all the dust out of it that collected through the years bought this new back in 1983 I believe with matching dual deck cassett recorder I yet have the manuals to them though doesnt give me any trouble shooting tips what can be?
@Michael-w8v5 жыл бұрын
I have Marantz 2220 that I recently restored. Painful to work on amplifier.
@highcastle15 жыл бұрын
Why do service guys on KZfaq always talk in slow motion like they're doing Mr. Rogers?
@johnstark53245 жыл бұрын
Oh yeah, 2SC458! Akai reel to reels are famous for those!
@josephsilva74165 жыл бұрын
The part #r755 burn up in front of the temp sensor.do you know what cause it?
@zoltank21255 жыл бұрын
No more updates on the status of this project ?
@victorcoss26006 жыл бұрын
Mine originally didn't have compound on the transistors, it had pads, do I remove the pads and apply thermal compound?
@Lenny86792056 жыл бұрын
Where did you get the led's for the dial lamp replacement, my 2220B needs them. part # ? Thanks.
@desertronix6936 жыл бұрын
I love my TF600’s,they sound just flawlessly!
@mr.recruiterp3583 Жыл бұрын
As mine do!
@robjones873310 ай бұрын
Love my 600's as well 🙂 they are weird and wonderful
@frankkniseley99513 ай бұрын
I still have my DCM TF 600's I bought new in 92... They still Rock
@judges696 жыл бұрын
Wish you would of gone into more details.
@OldTechFan6 жыл бұрын
Tell me what you would have liked me to detail. I always appreciate the feedback. Thanks
@harveyjones42656 жыл бұрын
judges69 @ elvis
@harveyjones42656 жыл бұрын
judges69 - y elvis in
@harveyjones42656 жыл бұрын
' wayne
@harveyjones42656 жыл бұрын
0
@mattwassum86946 жыл бұрын
A question, I just recapped the amp board on my 2220b. It powers up but if I turn up volume past 1/4 the protect relay trips out.i used the ELNA Silmic ll because I was assured they are low leakage? What did you use on your low leakage caps.
@OldTechFan6 жыл бұрын
Yes they are low leakage and suitable for your application. Often times after a recap other problems get uncovered. First double check your work and make sure all caps are in with correct polarity. Next I would check your supply voltages. If those are good I would suspect high dc offset due to aging differential pairs or even driver or pre driver transistors. A service manual is going to be needed and can be downloaded from the internet. Good luck.
@OldTechFan6 жыл бұрын
Also check your idle current. And as in my video make sure the bias diode is alive and does not have a bad connection.
@mustaffa754 жыл бұрын
@@OldTechFan how can I get in touch with you?
@jlsagely68926 жыл бұрын
It belonged to your Dad? I wouldn’t sell it. But that’s just me....
@OldTechFan6 жыл бұрын
I’m not selling it. I am restoring it for him.
@jlsagely68926 жыл бұрын
Ahhhh, my bad. When referred to him as “the owner”, it sounded like you meant a 3rd party. It is just gorgeous. Have fun. I’m very jealous.
@brianpezzolla97854 жыл бұрын
OldTechFan where are you located? I’m in Southern California with my dad’s old C22 that needs similar attention. If you’re close, would love to chat.
@TroyPalenski Жыл бұрын
@@brianpezzolla9785 This guy apparently doesn't get back with people poor channel to say the least..
@Joe-ud8qd6 жыл бұрын
what would cause all the lights to go out at once on a JVC rx-6020v receiver still plays just no lights
@Lenny86792056 жыл бұрын
Where did you find new electrolytic cans? I have 2 JVC's that need 6800uf @56 volt.Thanks.
@transam7906 жыл бұрын
I have a 2230 that needs attention. Do you have a website and pricing?
@frankgeeraerts62436 жыл бұрын
Nice job !
@frankgeeraerts62436 жыл бұрын
Very good advise .............polarity of capacitors hahaha , yes i've seen these errors ! Do the same and work in steps and control after every work . These amps sound fine with a job well done ............i heard to often restored ( good old ) amplifiers sound bad after a recap with inadequate or huge oversized caps. The output capacitors if still good , i leave them to preserve the original sound . ( they are not under the same stress as the filter capacitors and often age well .) Thanks for sharing ....
@earthlycreature87726 жыл бұрын
Great Video. My JVC RX-707 has similar problems. Changed one of the channel's two transistors but can't find the manufacture and part number of that white "cased" resistor of 3 Watt 0.22 Ohm you show testing on your video and need your support. Thanks, Danish
@MercedesE63S-AMG6 жыл бұрын
We have a jvc rx -309tn with just 2 stock speakers on it at work in the shop. Well one day we came in and the tweeters work on both speakers but the woofers that are in the same boxes do not. So speakers have no bass just tremble. Have any clue what could be wrong?
@OldTechFan6 жыл бұрын
Sounds more like a speaker issue to me. Maybe a fault in the tone circuit.
@robertopereira4037 жыл бұрын
Dear Sir. Please, do you have the front door hinges on the JVC RX-1050? Or do you know who you are? Thanks. Roberto from Brazil.
@anthonydc37147 жыл бұрын
Hi, I was wondering if you used mica insulators on the MJ21193G/MJ21194G output transistors. Or did you use silicon insulators? Thanks
@JohnLeaf7 жыл бұрын
i wannna see this baby playing
@TheHoss41456 жыл бұрын
"This baby" LOL...
@edsal24977 жыл бұрын
Hello I have a jvc RX805 vtn similar to the one you are fixing. I have it since 1993 a long long time.. but recently stop working. I replaced the fuze 3 times but as soon as I power the fuze burns. I was told to change the capacitors, but I am not shure what capacitors the power suply capacitors or the capacitors for the audio section? I'd appreciate if you can give me a tip. Thanks
@OldTechFan7 жыл бұрын
My bets are on shorted output transistors. Capacitors rarely cause dead shorts that blow fuses like that in solid state gear. Could also be bad power supply regulator or diode.
@edsal24977 жыл бұрын
Thank you verry much for your awnser. I will check diodes and the output transistors.
@MasterNiva7 жыл бұрын
So did you replace the fiter capacitors?
@brig.43987 жыл бұрын
Well at least you got a discount, I have argued with my local Goodwill to give me a discount on stuff that doesn't work. They just say oh well if something doesn't work bring it back and exchange it. I tried to explain I'd take it as is and try to repair it. At least the store makes a little money instead of it getting tossed into the recycle bin.