I have an American Bass amp here where the power was cycling between power and protect. When I first attach remote power, the relays would engage, and then click out. Then the amp would cycle between power and protect about every 2 seconds.
When I test between the main ground and the secondary ground, RCA shield, or inductors I get 1.49vdc pulses with the amp cycling.
I removed the output driver card. This in turn stopped the cycling. The amp powers up. Pulls no excessive current. PS waves look good. All voltages are present.
When I tested the pads where the driver card attaches, all the voltages look fine. However, when I touch the red probe to pads 3 or 6 of the first bank of the pads for the left side of the driver card, the amp will protect. It shows the voltage then into protect. A reset of the remote, amps back to normal. Its only doing this on the left side bank of pads. When I test the right side pads it doesn't protect...
Any ideas? I'm lost. Never had this happen before.
When I test between the main ground and the secondary ground, RCA shield, or inductors I get 1.49vdc pulses with the amp cycling.
I removed the output driver card. This in turn stopped the cycling. The amp powers up. Pulls no excessive current. PS waves look good. All voltages are present.
When I tested the pads where the driver card attaches, all the voltages look fine. However, when I touch the red probe to pads 3 or 6 of the first bank of the pads for the left side of the driver card, the amp will protect. It shows the voltage then into protect. A reset of the remote, amps back to normal. Its only doing this on the left side bank of pads. When I test the right side pads it doesn't protect...
Any ideas? I'm lost. Never had this happen before.