When the secondary coil of a power transformer provides 44V to each side of a bridge rectifier relative to the ground, i.e. 88V total, and I measure +53V and -63V after the rectifier on the filtering electrolytic capacitors, and those voltages have no visible pulsations, what can explain the elevated -63V?
The schematics calls for +-51V, so +53V is slightly over, but not a major concern, while -63V is considerable overvoltage.
Pretty much as in this diagram:
The rectifier in question is RBV-602 and the caps are 10,000uF 71V.
I would expect -63V pulses if there was no cap, but why with a cap?