Samsung MM-G25 Service Manual page 65

4-1-2 No Output
No Output
Check all function
(CD/DVD, Tuner, AUX).
Check MAIN PCB
FIC1 R2S15904 input and
output signal
Check MAIN PCB
AIC1 Pin 23: Low Mute; High Normal
FIC1 Pin 24: 9V
Check MAIN PCB
PT01 Pin 9: -24V and
Pin 10: +24V
Replace AAIC1
Samsung Electronics
Yes
All function fail
Yes
Input fine but output fail
1 / 2
 Refer to wave pattern
Yes
image of Fig. 4-3-1
and Fig. 4-3-2.
Yes
No
Only CD/DVD/USB
No
Check AUX signal input and signal
Input signal fail
No
Pin 44: Low Normal, High Mute
No
Troubleshooting
Check MPEG PCB
pattern
Check MICOM IC "UIC1"
Check SMPS stage
(All power source check)
4-5