Samsung Electronics
4-3
Troubleshooting
4-1-2 No Output
Check Signal
at FIC1 (R2S15904) on MAIN PCB
(Pin 26, 27 → 1KHz)
Yes
No
Check Signal
in MAIN PCB FIC2
(Pin 1, 7 → 1KHz)
Yes
No Output
No
OUTPUT CHECK
PARTS OPEN/SHORT
Check Mode on
AAIC1 (Pin 23)
(L: Mute, H: Normal)
REPLACE AAIC1
MICOM UIC1
Pin 47 (L: Normal, H: Mute)
Pin 48 (H: Normal, L: Mute)
Low
High
Check Voltage on
AAC6 (+22V or +15V)
AAC7 (-22V or -15V)
SMPS CHECK
No
Yes
Refer to wave pattern
image of Fig. 4-1.
Refer to wave pattern
image of Fig. 4-1.
Summary of Contents for MM-DA25
Page 34: ...Samsung Electronics 6 3 PCB Diagram 6 2 MIC PCB Top 1 2 MCON11 UJ2 ...
Page 36: ...Samsung Electronics 6 5 PCB Diagram 6 3 MIC PCB Bottom MCON11 UJ2 ...
Page 37: ...6 6 Samsung Electronics PCB Diagram 1 2 6 4 FRONT PCB Top MCW1 VFD1 UJ11 ...
Page 39: ...6 8 Samsung Electronics PCB Diagram 6 5 FRONT PCB Bottom MCW1 VFD1 UJ11 UIC2 HIC2 MIC1 ...
Page 43: ...6 12 Samsung Electronics PCB Diagram 6 7 1 Test Point Wave Form TP1 TP2 ...
Page 46: ...Samsung Electronics 6 15 PCB Diagram 6 9 MPEG PCB Bottom MIC1 BIC4 DIC3 VIC1 IC4 IC3 IC2 ...
Page 47: ...6 16 Samsung Electronics PCB Diagram 1 6 10 SMPS PCB Top CON3 IC1 ...
Page 49: ...6 18 Samsung Electronics PCB Diagram 6 11 SMPS PCB Bottom CON3 ...