Samsung SCM-7270 Service Manual page 21

Troubleshooting
6-2-2 Malfunction of Audio Output
Malfunction of Audio output
Yes
No
Check voltage of NIC05
Replace NIC05
Yes
No
Check waveform of NIC9282
Check NIC9282 soldring conditon
pins 19,20
Yes
Replace NIC9270
No
Check waveform of NIC9270
Check NIC9270 soldering condition
pins 9,12
Yes
No
Replace NIC9270
Check waveform of NIC9270
Check NIC9270 soldering condition
pins 2,19
Yes
Check Amp. operation
Samsung Electronics 6-5