Synchro-bias
New ClassA
clear on the CD and Phono, havent adjusted yet, i think it must be underbiased since no heat ( trimmers were put at minimum).... might take time to heat up . DC offset is best at zero that means left channel droppping to 05 .4mv was better than the right at 1.3mv
The problem is only the left channel is working with PHONO, was sure when i checked the phono was showing continuity, hope there hasnt been any transistor blow out in the short, or maybe opamp ? or adapter or dry joint at best i hope, most liklely is i had to repair a trace but was sure it was fine,
As for bias maybe run a bit to get warm, turn off then power up wait about 10 and do adjustment or wait 1min if already warm
The problem is only the left channel is working with PHONO, was sure when i checked the phono was showing continuity, hope there hasnt been any transistor blow out in the short, or maybe opamp ? or adapter or dry joint at best i hope, most liklely is i had to repair a trace but was sure it was fine,
As for bias maybe run a bit to get warm, turn off then power up wait about 10 and do adjustment or wait 1min if already warm
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