I'm looking for a schematic and any info for an 8 Channel Delco amplifier from an older Peterbuilt heavy truck. I think it may be the same as the older GM Monsoon systems used. It's an 8 channel amplifier with built in crossovers. It uses eight Delco 82452 chip amps. This one won't power up and the head unit is displaying "Check Amp Fuse".
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Online there was some speculation that the ICs (for monsoon) were the TDA7396.
Is the IC in the photo burned out?
Is the IC in the photo burned out?
The IC in the photo looks physically fine, the camera just made it look bad. The TDA7306 does seem to look very similar. This whole system uses 2 ohm speakers.
I'm curious how the amplifier communicates with the head unit. It doesn't use the standard remote trigger wire to turn on. It has three "data" wires that connect with the head unit, the amp and a remote control unit in the bunk of the truck. I assume the bunk controls would be similar to rear seat audio controls in a GM vehicle. Modern Delphi and Aptiv head units plug right into these systems but instantly show the "Check Amp Fuse" message so I assume the communication protocal has changed. Normally we just disconnect the "Data" plug on the head unit and the message goes away. Obviously the bunk controls stop operating but the amplifier still powers on.
I'm curious how the amplifier communicates with the head unit. It doesn't use the standard remote trigger wire to turn on. It has three "data" wires that connect with the head unit, the amp and a remote control unit in the bunk of the truck. I assume the bunk controls would be similar to rear seat audio controls in a GM vehicle. Modern Delphi and Aptiv head units plug right into these systems but instantly show the "Check Amp Fuse" message so I assume the communication protocal has changed. Normally we just disconnect the "Data" plug on the head unit and the message goes away. Obviously the bunk controls stop operating but the amplifier still powers on.
I can't answer the question about the error message. If you want to try to determine if any of the ICs is defective, measure the resistance from each of the speaker output terminals of the IC (5 and 7) to the positive supply (pin 3/9) and ground (pin 6). All should read the same and none should read near 0 ohms to + supply or ground.
