Samsung CL21K40MQGXXAZ Service Manual page 41

Troubleshooting
5. MSP3425G-B8(Audio Processor) Diagnosis
This receives the signal from the Audio Processor (TDA9377PS/N3) and outputs the signal in TDA9377PS/N3
- Power supply : 12.5V
- Check for input defects : B+8V, A+5V
- Check for output defects : DACM_R,DACM_L
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