Yamaha C-4 input selector - diyAudio
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Old 11th October 2007, 11:25 PM   #1
diyAudio Member
Join Date: Nov 2005
Location: Chicago
Default Yamaha C-4 input selector

The input selector on my Yamaha NS Series C-4 preamp has gone bad. The sound breaks up or fails altogether. Rotating through the inputs sometimes fixes the problem, but it always comes back.

I have no idea how to find the replacement part number, or a source for the part, since I don't think Yamaha makes them any more. Can anyone help me?

If I can't get the Yamaha part, does anyone know another rotary selector that would do the job just as well? Looks are not a consideration.

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Old 12th October 2007, 02:57 AM   #2
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Join Date: Mar 2001
Location: Brazil
It may all depend on how many positions and decks the Yamaha uses.

I like the Grayhill selectors, and I use them. Contacts should be at least solid silver.
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Old 12th October 2007, 06:34 AM   #3
Bigred is offline Bigred  Canada
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Join Date: Jul 2007
Are you sure its actually worn/gone bad or maybe just in need of a blast of deoxit?
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Old 12th October 2007, 07:50 PM   #4
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Location: Chicago
It's been cleaned twice. It has 5 positions.

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Old 13th October 2007, 09:58 PM   #5
KBK is offline KBK  Canada
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Join Date: Dec 2003
Location: The Wilds Of Canada
I've owned two of them. Once I pulled the switch out and re-clamped the solder points.

They are the usual kind of alps brand custom parts, they cannot be easily replaced by anything.

If any of you have ever taken apart a alps black beauty pot or the like, the failure point can sometimes be that the solder pins are 'clamped' to the plastic film substrate, which is alot like a little circuit board. the connection point is merely a press tight lug contact. So they sometimes need to be re-pressed. the switch needs to be pulled for this effort. There are no guarantees on this fix. As well, the contacts on the switch proper are done the same way and can be similarly fixed.
"Extraordinary claims require extraordinary evidence." - Carl Sagan. Sometimes the claims aren't extraordinary. Sometimes the weakness of men's minds are the culprit. Mass mentality has nothing to do with obviousness or truths.
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Old 19th October 2007, 07:34 PM   #6
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Location: Chicago
I was afraid of that. Any idea how I can find the part number and maybe track down a replacement?

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