Tip & How-To about Miscellaneous
ROTEL RA 980BX
Fault: No output from left channel. The right channel is working fine.
Added some photos and circuit for reference
While testing the amp noticed that the left channel is giving switch on off thump while powering ON and OFF the amplifier. It happens when there is DC voltage flow through the speakers. It shouldn't be there. And the thump is there only on the left channel. While testing the amplifier section found that all the transistors where idling at mentioned voltage. All Base pins where around +/- 0.5volt. and the output is almost 0.012mvdc.
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Posted by Electro... on
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