That changes things... to some degree. I was mistaken about the type of board. I assumed that there was a 21844 under one of the heatsinks.
The attached circuit is likely what you have.
Do you see any transistors near the shunt resistors?
The attached circuit is likely what you have.
Do you see any transistors near the shunt resistors?
Attachments
Look for narrow traces leading away from the shunts. If there are any, do they lead to a group of components that include a transistor. You're looking for the equivalent of Q288 on the AQ1200 diagram.
Look for this for both sets of shunt resistors. In the AQ1200 diagram, they show only one circuit/shunt-group but sometimes, there are two independent circuits.
Look for this for both sets of shunt resistors. In the AQ1200 diagram, they show only one circuit/shunt-group but sometimes, there are two independent circuits.
Can you easily replace the resistor on the driver board?
Leave those transistors out of the circuit, for now.
Leave those transistors out of the circuit, for now.
If you replace it, does the amp go into protect with those two transistors out of the amp?
I'm assuming that those are the transistors on the shunt resistors.
I'm assuming that those are the transistors on the shunt resistors.