It may be a 3-layer board and may have burned traces on an inner layer.
The IC may be bad as well. What's the DC Voltage on pin 16 of the 3525?
The IC may be bad as well. What's the DC Voltage on pin 16 of the 3525?
So I had was reading the 3525 backwards so the readings I gave you were incorrect. I corrected the issue and retested everything.
Dc voltage on all CORRECT pins are
3525
Pin 11- 9.48
Pin 12- 9.73
Pin 13- 9.78
Pin 14- 9.48
Resistance between pin 12 and blown trace = 0 Resistance.
all measurements done without connecting pin 12 to ground terminal.
I apologize for my stupidity.
Dc voltage on all CORRECT pins are
3525
Pin 11- 9.48
Pin 12- 9.73
Pin 13- 9.78
Pin 14- 9.48
Resistance between pin 12 and blown trace = 0 Resistance.
all measurements done without connecting pin 12 to ground terminal.
I apologize for my stupidity.
Pin 12 must be connected to ground.
Pin 16 voltage (and others after reconnecting pin 12 to ground)?
Pin 16 voltage (and others after reconnecting pin 12 to ground)?
After grounding pin 12, amplifier turns off, applying power to remote does not turn amplifier on.
Pin 11, .007
Pin12, .001
Pin13, 12.49
Pin14, .008
Resistance between pin 12 and trace 0
Pin 11, .007
Pin12, .001
Pin13, 12.49
Pin14, .008
Resistance between pin 12 and trace 0
See if you can find a PNP transistor (possibly an MPSA56) with its collector connected to pin 15.
Confirm that the remote terminal has 0v when only B+ and ground are connected.
When your meter alternately on HZ and %, what are the readings on those two modes on pins 11 and 14?
Confirm that the remote terminal has 0v when only B+ and ground are connected.
When your meter alternately on HZ and %, what are the readings on those two modes on pins 11 and 14?
Q2 (mpsa06) collector connects to pin 15
Remote terminal has 0 volts with B+ and G connected
Pin11, Dc-.007v, Hz 0.000, % 000.0
Pin14, Dc-.009v, Hz 0.000, % 000.0
Remote terminal has 0 volts with B+ and G connected
Pin11, Dc-.007v, Hz 0.000, % 000.0
Pin14, Dc-.009v, Hz 0.000, % 000.0
Copy and paste the following list and fill in the blanks. If there is no blank space after the colon, add one between the colon and the numbers you enter. It makes it much easier to read. Before doing this, make sure that pins 13 and 15 are at about 12v and pin 12 is at 0v.
DC voltage?
Pin 1:
Pin 2:
Pin 3:
Pin 4:
Pin 5:
Pin 6:
Pin 7:
Pin 8:
Pin 9:
Pin 10:
Pin 11:
Pin 12:
Pin 13:
Pin 14:
Pin 15:
Pin 16:
DC voltage?
Pin 1:
Pin 2:
Pin 3:
Pin 4:
Pin 5:
Pin 6:
Pin 7:
Pin 8:
Pin 9:
Pin 10:
Pin 11:
Pin 12:
Pin 13:
Pin 14:
Pin 15:
Pin 16:
DC voltage?
Pin 1: .112
Pin 2: 5.145
Pin 3: .017
Pin 4: .427
Pin 5: 2.028
Pin 6: 3.770
Pin 7: 1.967
Pin 8: .007
Pin 9: 6.027
Pin 10: .001
Pin 11: .007
Pin 12: .001
Pin 13: 12.45
Pin 14: .008
Pin 15: 12.45
Pin 16: 5.159
Pin 1: .112
Pin 2: 5.145
Pin 3: .017
Pin 4: .427
Pin 5: 2.028
Pin 6: 3.770
Pin 7: 1.967
Pin 8: .007
Pin 9: 6.027
Pin 10: .001
Pin 11: .007
Pin 12: .001
Pin 13: 12.45
Pin 14: .008
Pin 15: 12.45
Pin 16: 5.159
There is a capacitor connected between pin 8 and ground. Pull it and see if the voltage on that pin increases.