im working on this amp it had shorted outputs and some damage to the preamp section.. had a opamp the blew up and replaced voltage regulators.
the issue im having now is not getting any audio. i have both pos and neg rail voltage. i have positive 12v and negative 12v for the voltage regulators.
when i probe the speaker terminal with black probe on ground terminal i show the negative rail voltage on both positive and negative speaker terminals.
any ideas?
the issue im having now is not getting any audio. i have both pos and neg rail voltage. i have positive 12v and negative 12v for the voltage regulators.
when i probe the speaker terminal with black probe on ground terminal i show the negative rail voltage on both positive and negative speaker terminals.
any ideas?
1. -14.73
2. 0
3. -22.96
4. -23.45
5. 0
6. -11.83
7. 0
8. -20.45
9. -19.53
10. -23.35
11. -19.50
12. 0
13. -20.43
14. -20.40
2. 0
3. -22.96
4. -23.45
5. 0
6. -11.83
7. 0
8. -20.45
9. -19.53
10. -23.35
11. -19.50
12. 0
13. -20.43
14. -20.40
1. -14.80
2. 0
3. -22.96
4. -23.46
5. 0
6. -11.82
7. 0
8. -20.67
9. -19.70
10. -23.21
11. -19.66
12. 0
13. -20.62
14. -20.62
2. 0
3. -22.96
4. -23.46
5. 0
6. -11.82
7. 0
8. -20.67
9. -19.70
10. -23.21
11. -19.66
12. 0
13. -20.62
14. -20.62
You should have +12 volts on Pin 1 of the LM361. Pin 6 is correct. If you have +12 volts out of the positive voltage regulator, there may be something blocking the +12 volts to the LM361 or to that side of the board which U102,U105 & Q105 also use the +12 volt supply.
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