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advice needed: restoring 47-1230 - FM & AM now works!!!! :D (uncertain about SW)
#12

I can't seem to find DeOxit locally here in Canada. I have a co-worker that says an electronics store near his place might have some, otherwise I'll order, I might have found canadian supplier that would ship to here.

In the meanwhile, I have purchased another contact cleaner, thinking It'll be a start. It does work wonder on the volume pot.

But I realised the PB/BC/SW/FM switch is a beast on its own!
It is not a single casing with 4 contacts, but rather a mecanism, leading to a rod that includes a series of sets of switches.

from that top knob:
[Image: http://i146.photobucket.com/albums/r253/...0_9255.jpg]

to that shaft:
[Image: http://i146.photobucket.com/albums/r253/...0_9257.jpg]

here's one end inside the chassis:
[Image: http://i146.photobucket.com/albums/r253/...0_9260.jpg]

[Image: http://i146.photobucket.com/albums/r253/...0_9263.jpg]

another end of the chassis:
[Image: http://i146.photobucket.com/albums/r253/...0_9266.jpg]

In essence, there's like 4 sets of switches in there. I fail to see why pushing the knob gets better contact under those conditions. I wonder if it might be related to a wire I changed, leading to a lesser quality connection? I'll have to give it a try, after I change my e-caps. After cleaning and letting evaporate for about an hour, the result wasn't as expected and all is still as it was. "better luck next time"

On a better note, I received my caps!
[Image: http://i146.photobucket.com/albums/r253/...0_9274.jpg]

Overtime aside, I might have time to do that before easter.
So I have 22mF 450V as a replacement for the 20mF & 25mF e-caps.

-Mars


Messages In This Thread
Re: advice needed bringing this 47-1230 to its former glory - by Marsupial - 04-18-2011, 09:58 PM



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