I rebuilt the power supply board, usual suspects on the amplifier boards, recapped and replaced a couple of transistors on the protection board a few years ago.
Worked fine for a long time but it started dropping out a couple of weeks ago and now the relay does not engage at all.
The voltages on the protection board listed in the service manual are spot on.
But, power supply voltages have wandered a bit. Pins 10 and 14 are 60 volts,
15 is 27.5, 13 is 38, 11 is 24.95, 9 is 13.77
All seem a little high. Line voltage is 121 so it's not that.
Would 60 volts on the rail throw the protection circuit off ?
Any suggestions ?
Worked fine for a long time but it started dropping out a couple of weeks ago and now the relay does not engage at all.
The voltages on the protection board listed in the service manual are spot on.
But, power supply voltages have wandered a bit. Pins 10 and 14 are 60 volts,
15 is 27.5, 13 is 38, 11 is 24.95, 9 is 13.77
All seem a little high. Line voltage is 121 so it's not that.
Would 60 volts on the rail throw the protection circuit off ?
Any suggestions ?