Is DC voltage making it beyond the remote connector? They often have bad connections.
Is the driver IC producing pulses when you apply remote?
If no drive pulses, the voltages on all terminals of the LM339 would be helpful.
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:
Is the driver IC producing pulses when you apply remote?
If no drive pulses, the voltages on all terminals of the LM339 would be helpful.
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:
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