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Kenwood KA-88 Receiver issue.. It's a doozy

I know this isn't a "request" per se, but this website doesn't exactly have a structured forum like VE does.

I have a 1989 Kenwood KA-88 that was handed down to me from my late grandmother years ago. When I was going through my early 20's and at the party stage of my life, we had some people over, and someone who was way too intoxicated to be near my equipment spilled their beer on top of my stereo unit. I of course was absolutely livid, as this not only wasn't the first thing he spilled all night, but the fact that this unit means SO much to me... You get the picture.

Fast forward about 5 years, and now I have a Stereo unit that works fine other than the fader. I believe there is corrosion in the unit causing the right side to crackle in and out, and generally the only solution to HOPEFULLY get it to rectify itself is to spin the fader back and forth really fast between left and right channels.

Now, my question is, is there anything that I can do, short of taking this to a very pricey repair center, to fix this? Any pointers would be extremely helpful, as my intent is to bring this head unit back to a healthy (and beer free) life.



Re: Kenwood KA-88 Receiver issue.. It's a doozy

when I was told about WD 40 I didn't believe it either I don't think I know everything about electronics but when someone suggests a new idea I do not run them down unless I try the suggestion first, if you got the guts to actually try a new idea you will be surprised to find that it does work, I spent 20 years operating a 50,000 watt AM transmitter as well as repairing all kinds of electronic equipment, I was told by a fellow tech that I knew and respected, I have used it on my own vintage stereo equipment, not only is it better than contact cleaner it lasts longer, I did mine over 5 years ago and it still is working good, I havn't tried it on switch contacts yet but it does work on volume, balance, bass and treble controls, I only offered a cheap solution its up to you to try it or not. but if you do, please report back your findings,
for the ones that condemn it without trying it, it is your loss not mine.

Re: Kenwood KA-88 Receiver issue.. It's a doozy

Contact cleaner and canned air did the trick. The inside was filthy, but it's much better now and the dials have never felt smoother.

Recaptcha's picture

Re: Kenwood KA-88 Receiver issue.. It's a doozy

I am glad the contact cleaner worked! It usually does. Make sure to keep all beverages away from the stereo!

Never ever use WD-40 on electronics ever. EVER!

Re: Kenwood KA-88 Receiver issue.. It's a doozy

if the contact cleaner doesn't work and before replacing the control try just a little squirt of WD 40, you can get it at most hardware stores and is cheaper than contact cleaner, I use it on my 70's Hitachi component stereo and it works better and lasts longer than contact cleaner, I assume you can get it inside the control, if the control is a slider squirt it in the front, if it is sealed, there is a way to get it also, just post here if you have a question.

Re: Kenwood KA-88 Receiver issue.. It's a doozy

Re: Stone Cat's use of WD40:
WD40 has no business around home electronics.
I would never recommend to others the use of such garbage.

Re: Kenwood KA-88 Receiver issue.. It's a doozy

it is hilarious seeing the comments on here by people who think they know it all, yet are unwilling to try a new idea, their minds are locked shut like a steel trap, too bad they miss out on things that actually work, do any of you have the guts to try WD 40 and would you give an honest report? I didn't say soak the unit in WD 40 just give it a very quick spurt, very little goes a long way, I have been working in electronics for over 40 years, my advertising was by word of mouth only and I have always been busy. how many of you can say that?

Re: Kenwood KA-88 Receiver issue.. It's a doozy

Personally, I have seen some controls that were damaged by WD-40; it soaks into the phenolic insulator and causes it to come apart. Does this happen every time? No, but why risk it? There are plenty of products that were actually made for this application. BTW--I've been an electronic technician for 45 years.

Re: Kenwood KA-88 Receiver issue.. It's a doozy

today's contact cleaners do not work as good as the old ones, they remove the chemicals that worked because of environmental concerns so if you were left with the choice of throwing the unit in the garbage or trying WD 40 what would you do, I have an old Sony 8 track, turntable component stereo on the bench right now, the 8 track was seized and the turntable seized so hard I had to soak the spindle with a little fluid film, the turntable now spins freely and the 8 track only needs a new belt, should I have just thrown it in the garbage? no, the reward for getting it going is the satisfaction of knowing you can do it, I think you have had that feeling many times, it looks like you and I are about the same age, I have over 1000 tubes still in their boxes as well as 14 or 15 old tube radios, and very old test gear sitting around because I like to look at them now and again, I wish you only the best, have a very, very Merry Christmas

Re: Kenwood KA-88 Receiver issue.. It's a doozy

it is hilarious seeing the comments on here by people who think they know it all, yet are unwilling to try a new idea, their minds are locked shut like a steel trap, too bad they miss out on things that actually work, do any of you have the guts to try WD 40 and would you give an honest report? I didn't say soak the unit in WD 40 just give it a very quick spurt, very little goes a long way, I have been working in electronics for over 40 years, my advertising was by word of mouth only and I have always been busy. how many of you can say that?

Re: Kenwood KA-88 Receiver issue.. It's a doozy

Agreed. It's amazing how many people think WD-40 will solve any problem. Maybe they're too lazy to buy the right product.

Re: Kenwood KA-88 Receiver issue.. It's a doozy

Yeah, reading up on it, the chemicals/oils in WD-40 tend to do more harm than good, and if you're trying to make your stereo live for another couple decades, you would NOT spray that inside of it, or any other electronics for that matter.

That being said, is this guy talking about specialty wd-40 contact cleaner?
See:
https://www.mscdirect.com/browse/tnpla/82218686?cid=ppc-google-New+-+Lubricants%2C+Coolants+%26+Fluids+-+PLA_sIqMxYEx8___164110813908_c_S&mkwid=sIqMxYEx8|dc&pcrid=164110813908&rd=k&product_id=82218686&gclid=CjwKCAiAjanRBRByEiwAKGyjZeMvP7dPmpnpkq9dm9ZKYMNIpME8PMftofoYNgSGv26T5NzCY1sWixoCgW0QAvD_BwE

Recaptcha's picture

Re: Kenwood KA-88 Receiver issue.. It's a doozy

Probably not. He referred to contact cleaner as not working, and that was contact cleaner, just with a name that more people would trust.

I would steer clear, which type did you use? Blue Shower?

Re: Kenwood KA-88 Receiver issue.. It's a doozy

CRC I believe. It was the walmart brand. Sprayed it on every dirty surface and pot and switch, let it air out for 4 hours, then put it all back together and worked like new.

Recaptcha's picture

Re: Kenwood KA-88 Receiver issue.. It's a doozy

That's the way to do it! Contact cleaner will corrode some plastics, so always stay away from spraying heavily on the outside. "Electronics Duster" I guess is more for that kinda thing, although I have never used it.

Recaptcha's picture

Re: Kenwood KA-88 Receiver issue.. It's a doozy

By fader, I assume you mean volume control. I am glad to see that your unit is working otherwise. An accident like what happened to it is usually fatal.

1. A little contact cleaner always helps. Take contact cleaner and spray in the volume knob. Make sure to do this from inside the unit. just spraying the outside will not work. Find the actual pot, the dial that solders to the board, and make sure to spray so the cleaner will get inside the pot. Try not to get on any of the unit's finish. I recommend 'Blue Shower'.

2. Ok, so you should verify the solder joints where the volume fader connects to the board. Making sure it is not corroded from the beer. Also, check for other corrosion. Sometimes, what seems like a volume knob, is really not. Make sure the solder joints that connect from the pot to the board are not broken, ruptured, or cold.

3. Replace Volume dial. Find replacement and re-solder.

Hope this helps!