One channel of the power amp in my band's Studiomaster Powerhouse version 908E has blow up and I require some help, please?
Having spent several hours replacing almost all of the faulty transistors and diodes, I managed to get the power amp working, however the amp is still showing and imbalance with 0.5v dc across the speaker terminals and I can't seem to trace the problem.
I attach a copy of the circuit with DC voltage measurements taken from the working channel (in BLUE) and reading (in RED) taken from the faulty channel.
Any guidance would be appreciated.
Regards
Geoff.
Having spent several hours replacing almost all of the faulty transistors and diodes, I managed to get the power amp working, however the amp is still showing and imbalance with 0.5v dc across the speaker terminals and I can't seem to trace the problem.
I attach a copy of the circuit with DC voltage measurements taken from the working channel (in BLUE) and reading (in RED) taken from the faulty channel.
Any guidance would be appreciated.
Regards
Geoff.
Attachments
-
1.2 MB Views: 13