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Chuck[_20_] Chuck[_20_] is offline
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Default Harman Kardon Citation 17 Pre-Amp One Channel Intermittent

On Fri, 23 Mar 2018 14:36:28 -0700 (PDT), wrote:

On Friday, March 23, 2018 at 9:54:12 AM UTC-5, wrote:
On Friday, March 23, 2018 at 10:43:08 AM UTC-4, wrote:
Check the tape monitor(s) first.


I will.

Peter Wieck
Melrose Park, PA


It also appears that the hi cut and low cut switches can cause a complete loss of signal.

Remember since there is no big noise there is no DC involved. It also appears that some of the boards are plug in, all of those connections could be bad.

For the switches, worjk them very slowly to find out if in the out or in position they lose it at any time. Also, wiggle the PC boards very slowly and see if you can duplicate the problem that way.

Going fast doesn't get it sometimes. Also when you clean them, after some vigorous action, then go very slowly looking for any cutout or even distortion.

I found an elusive source of intermittent distortion in one channel of a Yamaha receiver by turning the function switch very slowly, and this was after it had supposedly been cleaned already by someone else. And this was not the first time that going very slowly revealed an elusive intermittent. Fast action and brute force are not the best course of action here.


FYI Yamaha had a whole year of amps and receivers with intermittent
source select switches in the 1990s which couldn't be repaired by
cleaning. They were made by Alps and had to be replaced.

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