Quote:
Originally Posted by PJL
As suggested earlier this would be my suggestion:
1. Disconnect all of the 4 output transistors.
2. Replace the dead 2N2147.
3. Clip the DMM set for volts across the collector and emitter of the 2N2147.
4. Switch on just for maybe 5 seconds and note the voltage reading.
5. If the measurement is around 10V, repeat the test on the other channel
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I'm getting 6v between the collector and emitter on the left channel (2N2148)
and 12v between the collector and emitter on the right channel (2N2147)