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Old 10th November 2018, 04:19 AM   #51
Perry Babin is offline Perry Babin  United States
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Join Date: Nov 2003
Location: Louisiana
I was hoping that someone with a diagram would help. I'm working from generic knowledge so I can't be of much help.

The DC on the op-amps in the preamp section is odd. The output of IC4 seems to agree with the input so the op-amp looks OK. The high voltage on IC5 is odd. I'd expect it to be near 0v on all inputs and outputs (not referring to thew PS pins).
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Old 10th November 2018, 05:06 AM   #52
Basshead1989 is offline Basshead1989  United States
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Join Date: Aug 2017
Location: Ohio
Ok Perry I appreciate you trying to help me. Maybe Ppalli
Will chime in from other audison post I've read he seems to know quite a bit about these amps. But if anything changes I will post it ASAP thanks again Perry..
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Old 12th November 2018, 07:37 AM   #53
ppalli is offline ppalli  Italy
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Join Date: Jun 2005
Location: marche
Hi,
about IC4 and IC5, as you can see from the diagram, IC5 is a buffer (pin6 and 7 together), so it is impossible that pin7 has a voltage other than pin6
Regarding IC4, if the problem is IC5 or 'before' IC5, the defect propagates to all opamps, including IC4.
My advice is to check the indicated resistors, close to RCA J3 and then remove IC10 and IC6 (input opamp) and check again the voltages on IC5 and IC4
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