I have here a defect PG ZPA 0.5. Power supply is OK, when I removed the 4 diodes for the high voltage supply, amp powers up and the idle current is ca. 2A. Red LED's in the amp in both channels are burning (OK, think so)
Measured all the fusible resistors, one replaced, others are OK. Output devices measures OK, drivers also..
When putting back the diodes I still have a shortcircuit....
Question:
What is the normal idle current, I read 750mA, but that seems very low for this big amplifier. I'm testing with a 6A power supply.
Any ideas or experience with reparing?
Rob.
Measured all the fusible resistors, one replaced, others are OK. Output devices measures OK, drivers also..
When putting back the diodes I still have a shortcircuit....
Question:
What is the normal idle current, I read 750mA, but that seems very low for this big amplifier. I'm testing with a 6A power supply.
Any ideas or experience with reparing?
Rob.