Hi all,
I'm having an issue with my Marantz PM8000. In short, the amp went dead silent all of a sudden. When I power it on, everything seems to work as expected. The LEDs on the front panel turn on, and I can hear a relay clicking. Only the speaker output relay is not switching. It doesn't matter if I use the A or B speaker output, the result is the same.
I'm no expert but I find it highly unlikely that both relays (A and B output) fail at the same time. I'm assuming something else is wrong here. I've been measuring 24V DC on both sides of the relay coil. Also there seems to be a small DC voltage (about 0.2, 0.3) on one side of the relays that I think should not be there. That's measured between the relay and the 220R-0.25W (3151 in the schematic) resistor.
Any ideas how to debug this any further?
All help would be greatly appreciated...
I'm having an issue with my Marantz PM8000. In short, the amp went dead silent all of a sudden. When I power it on, everything seems to work as expected. The LEDs on the front panel turn on, and I can hear a relay clicking. Only the speaker output relay is not switching. It doesn't matter if I use the A or B speaker output, the result is the same.
I'm no expert but I find it highly unlikely that both relays (A and B output) fail at the same time. I'm assuming something else is wrong here. I've been measuring 24V DC on both sides of the relay coil. Also there seems to be a small DC voltage (about 0.2, 0.3) on one side of the relays that I think should not be there. That's measured between the relay and the 220R-0.25W (3151 in the schematic) resistor.
Any ideas how to debug this any further?
All help would be greatly appreciated...