This 120w line amplifier had a distorted output..
So off with the top and take a look time...
Now, for those of us who repair audio system will know line voltages amps are different from the bog standard amplifier has they are transformer coupled with 80v 100v and common to 4 ohm and 8 ohm tappings.
This one had a shorted output transistor plus a few other bits and bobs..
After a bit of tracing out with the trusty scope round the input circuits showed a knackerd op-amp also.
But in the end she was back to working order..
So off with the top and take a look time...
Now, for those of us who repair audio system will know line voltages amps are different from the bog standard amplifier has they are transformer coupled with 80v 100v and common to 4 ohm and 8 ohm tappings.
This one had a shorted output transistor plus a few other bits and bobs..
After a bit of tracing out with the trusty scope round the input circuits showed a knackerd op-amp also.
But in the end she was back to working order..
