With everything back together last night, things were going well with full power (no dim bulb). Played a few songs, then played things at half volume and into the 2nd song, relay clicked and shut off speakers. Heatsink was quite hot. Let things cool down 10 minutes and music played fine at lower volumes. Did not try and crank it up again.
This morning, I pulled and tested all 8 outputs and they appear to pass DVM tests. (and explain why I can still play music)
So I went back to check voltages and the DC Balance Adjustment (points 4 left & 17 right) are no longer steady at 0, but fluctuating wildly on both channels between -.3V and +.3V.
Idle Current (points 2 & 6 on left and 15 & 19 on right) are both fairly steady around 35 mV, (I had them set at 50mV yesterday).
Again, music is playing fine on both channels at low volume.
Supply voltages at points 10 and 14 coming from Power Supply Circuit Assembly (where I replaced the 15 caps) is -50V and +50V (should be -60V and +60V).
I'll go back and start checking other transistor voltages on the PA board. Anything else I should check?
