This circuit use IC TDA1004A to main operation .IC is very nice and durable if used properly and correctly, by the way supply the correct voltage , don’t supply more voltage than 20 volts, because it can damage the IC. This circuit suitable for subwoofer speakers, but this amplifier is mono.See schematic and troubleshooting below :
- Supply voltage.
- IC Damaged or installation inverted.
- Component damaged .
- Installation components inverted.
- Line break PCB.
- Input not connected or input connect to ground.
- Output speaker not connected.