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Old 5th July 2012, 05:02 PM   #21
m4ick is offline m4ick  United States
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On IC103 in DCV I read:

1. -8.1V
2. -0.7v
3. 0.00v
4. -15V
5. -8.2
6. -8.2
7. -8.2
8. +15V

I replaced it due to excessive DC but I still have DC on all of those pins except 3 which is tied to secondary CT.

Is this IC defective again or could something else be driving -8V to it?

This is the IC that directly feeds pin 1 of the driver board.
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Old 5th July 2012, 08:18 PM   #22
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Confirm that the master/slave switch is working properly. Testing the connections between the components on the board (the ones connected to the switch) will be the most reliable way to test.
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Old 6th July 2012, 04:19 PM   #23
m4ick is offline m4ick  United States
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Yes, I get continuity on all the right connections and they switch with the switch
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Old 6th July 2012, 07:01 PM   #24
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Do you have any DC voltage (more than a few millivolts) across the speaker terminals?
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Old 11th July 2012, 06:17 PM   #25
m4ick is offline m4ick  United States
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0v across the speaker terminals, no outputs are installed.
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Old 12th July 2012, 02:09 AM   #26
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Was the op-amp that you replaced a new op-amp of the same part number?

Did you take the measurements with no input signal?
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Old 15th July 2012, 02:17 PM   #27
m4ick is offline m4ick  United States
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It was the same part from another clone amp that had signal at the driver board.

Measurements were taken with input signal, there is no input signal on that IC.
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Old 15th July 2012, 11:24 PM   #28
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Are you sure that it's IC103 and not IC106 (pin 7) that's driving pin 1 of the driver board (pin 1 of the driver board being nearest the RCA inputs)?
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