I have a P1000 that came in For repair due to not producing audio. I took the amp apart and checked the gate of output with my scope and noticed a small square wave was present on pad. I then checked the drain and realized it had 0 volts. I checked the power supply and it is functioning properly with nice square waves on gate and drain. I placed my multimeter probes on the center of the rectifiers and read 0 volts. The outter legs of rectifiers have nice square waves on them. I’ve repaired a couple of these but never seen them without rail voltage.
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With my multimeter in diode setting I’m getting .4 to .5 dc on CR1000-1005. And the 17volt regulators are the same. I think these are all the regulators for the power supply section.
CR1004 and CR1005 are all that apply for the rails.
How can you have 80+v of drive on the outer legs and nothing on the center legs?
What multimeter and scope are you using?
How can you have 80+v of drive on the outer legs and nothing on the center legs?
What multimeter and scope are you using?
That multimeter has liited bandwidth but should see some voltage on the outer terminals of the rectifiers. What is the CA voltage on the outer legs of each rectifier?
I don't see how you don't have 90v DC between the center terminals of CR1004 and CR1005. Maybe someone else can help.
I don’t neither. I have a T1500 and so check it and it has rail voltage on rectifiers and drain pad on outputs.