Thanks to all.

Thanks to all.

Posted by K-Bob (A) on April 5, 2015 at 20:51:03

In Reply to: Extremely low volume on old receiver posted by K-Bob on April 4, 2015 at 17:33:14:

It turned out to indeed be the tape monitor switch. It went bad somehow.
It is completely sealed so I was unable to get cleaner into it.
I got the schematic and looked at the switch layout with plans to jump the switch to force it into the "source" position. In experimenting with it I found two pins to jump that made the switch operate normally.

I am the first to admit that this kind of work is not my forte and I have trouble reading schematics, so I cannot explain how soldering a jumper between those two adjacent pins made the switch work again. By all rights it shouldn't have. Anyway, it is working normally again. Hurray!

I did no other work besides blowing the dust out of it and looking for swollen caps. I did not clean any other switches or the tuner since everything is working fine. Btw, I just use Radio Shack contact and control cleaner, which I used to clear up a problem with the selector switch on my Rotel pre just before I started on the Pioneer.

Thanks again guys, I'm glad to heave the old Pioneer back in the bedroom.

--

Mucking around the low-end since 1986.

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Follow Ups Full Thread

Topic - Extremely low volume on old receiver - K-Bob 17:33:14 04/04/15 (17)

RE: Extremely low volume on old receiver - rickl 13:23:54 04/06/15 (0)

Thanks to all. - K-Bob 20:51:03 04/05/15 (10)

Great job - airtime 06:51:26 04/07/15 (1)

RE: Great job - K-Bob 09:10:20 04/07/15 (0)

RE: Thanks to all. - Crazy Dave 09:19:53 04/06/15 (0)

brute force -- but effective - mhardy6647 06:36:48 04/06/15 (6)

sealed enough - K-Bob 10:26:33 04/06/15 (5)

I have read that you can low speed drill them. ... - Crazy Dave 07:24:36 04/08/15 (4)

RE: I have read that you can low speed drill them. ... - K-Bob 08:01:58 04/08/15 (3)

RE: I have read that you can low speed drill them. ... - Crazy Dave 08:35:59 04/09/15 (2)

Think I know why it worked - K-Bob 12:10:46 04/09/15 (1)

RE: Think I know why it worked - Crazy Dave 09:42:14 04/10/15 (0)

if you haven't -- clean all pots, switches, and controls - mhardy6647 08:08:23 04/05/15 (0)

RE: Extremely low volume on old receiver - Garth1 05:50:44 04/05/15 (0)

RE: Extremely low volume on old receiver - Eli Duttman 18:23:07 04/04/15 (2)

Fixed, thanks. - K-Bob 12:15:15 04/09/15 (0)

RE: Extremely low volume on old receiver - K-Bob 22:23:02 04/04/15 (0)

Follow Ups

Thanks to all. - K-Bob 20:51:03 04/05/15 (10)

Great job - airtime 06:51:26 04/07/15 (1)

RE: Great job - K-Bob 09:10:20 04/07/15 (0)

RE: Thanks to all. - Crazy Dave 09:19:53 04/06/15 (0)

brute force -- but effective - mhardy6647 06:36:48 04/06/15 (6)

sealed enough - K-Bob 10:26:33 04/06/15 (5)

I have read that you can low speed drill them. ... - Crazy Dave 07:24:36 04/08/15 (4)

RE: I have read that you can low speed drill them. ... - K-Bob 08:01:58 04/08/15 (3)

RE: I have read that you can low speed drill them. ... - Crazy Dave 08:35:59 04/09/15 (2)

Think I know why it worked - K-Bob 12:10:46 04/09/15 (1)

RE: Think I know why it worked - Crazy Dave 09:42:14 04/10/15 (0)

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