Post a photo of the board. Different revisions of the same model can have different boards.
12v computer supply... Sometimes. Some are too sensitive to the inrush current of some amplifiers.
Have you checked the fuses and confirmed that you had consistent 12v+ across the B+ and ground terminals as the amp tried to power up?
12v computer supply... Sometimes. Some are too sensitive to the inrush current of some amplifiers.
Have you checked the fuses and confirmed that you had consistent 12v+ across the B+ and ground terminals as the amp tried to power up?
The amp is powering up if you have positive and negative rail voltage.
If the LED isn't lit, it may be defective or have a broken lead.
Confirm that you read 120 ohms between the primary ground and the non-bridging speaker terminals.
Confirm that you read 0 ohms between the RCA shields and the non-bridging speaker terminals.
No RCAs plugged in and no power applied for either test
If the LED isn't lit, it may be defective or have a broken lead.
Confirm that you read 120 ohms between the primary ground and the non-bridging speaker terminals.
Confirm that you read 0 ohms between the RCA shields and the non-bridging speaker terminals.
No RCAs plugged in and no power applied for either test
Take a break if you wish or shall we keep going? What to test to ensure correct operation?
Negative voltage on the 7905? Measure with the black probe on the ground terminal of the regulator.
If this amp uses sil-pad material, it's best not to reassemble without adding heatsink compound to the transistors.
You need to clamp all semiconductors to the heatsink before testing for more than a few seconds at a time. You can test to confirm that the amp is producing audio out of the sink but only briefly, constantly monitoring the temperature of all components that would normally be clamped to the heatsink (including those under the board).
If this amp uses sil-pad material, it's best not to reassemble without adding heatsink compound to the transistors.
You need to clamp all semiconductors to the heatsink before testing for more than a few seconds at a time. You can test to confirm that the amp is producing audio out of the sink but only briefly, constantly monitoring the temperature of all components that would normally be clamped to the heatsink (including those under the board).
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