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How do I clean these switches?

mattstech

mattstech

New Member
For the past week I've been restoring this very beautiful Yamaha CA-600. Cleaned pots, replaced some caps that have drifted off in value, centered bias... etc. etc. It sounds very nice now.

Now, I really need some help with these 3 switches. I know where the contacts are, but it's impossible to get to them using electrical contact cleaner (DeOxit fader) and I really don't wish to take them apart for fear of breaking them in the process.

from inside:
IMG_0315.JPG
Outside: (probably not needed but I'll throw it in anyway)
IMG_0316.JPG
Is there some way to clean them?
Any help is greatly appreciated!
 
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Hello mattstech, welcome to AK. I think the nylon part of the switch moves front to back. Check by flipping the switch and see if it moves if it does then shoot Deoxit Into the channels of the switch and operate the switch. Hopefully that will clean the switch. Repeat as necessary.
 
NAD80 said:
Hello mattstech, welcome to AK. I think the nylon part of the switch moves front to back. Check by flipping the switch and see if it moves if it does then shoot Deoxit Into the channels of the switch and operate the switch. Hopefully that will clean the switch. Repeat as necessary.
Click to expand...
Thanks. The part of the switch that moves is the orange plastic. I've tried shooting DeOxit through those two little "rail-guides", It's improved only slightly but I'm not able to get ALL of the contacts inside the switch using this method.
 
KingBubba said:
Following with Caig Gold or Shield will seal the clean switches and keep you from having to clean them again soon.
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I live in Canada and unfortunately Caig products are very hard to get here. Had to pay almost $80 to get a small can of DeOxit Fader imported :(
 
Get rid of those 4 small blue/black tantalum 1µf/35v caps.
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The last 600 I worked on had issues that caused real nasty "pops". Bad enough to trigger the protect relay. It was one of those vary caps on that board.
 
avionic said:
The last 600 I worked on had issues that caused real nasty "pops". Bad enough to trigger the protect relay. It was one of those vary caps on that board.
Click to expand...
Had the same issue on this one as soon as I brought it home, But moving the coupling switch around back a few times seemed to have stopped this, and it's never returned since I've cleaned the switch. I'll be replacing those tantalums with above stated electrolytic caps asap when I head to B&E electronics tomorrow
Electrolytic:
http://www.be-electronics.com/product_p/1uf63vtw.htm
Tantalum:
http://www.be-electronics.com/product_p/1uf35v tant.htm


Also, How do I disassemble these switches?
 
They need to be unsoldered and removed from the board.. I'll see if I can find some photos.
 
partsconnexion has the D5 on sale for 14 USbucks a can. I didn't go further to see how much shipping would be within Canada. But maybe there are some other things you could use from them, they have some nice stuff available and have a nice package arrive. Wonder if the shipping and the exchange rate would make that a $40 purchase for you?
 
I would drop the switches into an ultrasonic cleaner, but I have a couple. Is this an option, i.e. know anyone?
 
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