Checkpoints By Error Mode - Samsung MM-G25 Service Manual

Troubleshooting
4-1 Checkpoints by Error Mode
4-1-1 No Power
No Power
 Refer to wave pattern
image of Fig. 4-1.
1
Check MAIN PCB UIC1
Pin 14, 40, 55 and
89: 5V
Yes
Check MAIN PCB
UIC1 Pin 3: 5V (High)
Yes
Check VFD Voltage
in MAIN PCB FCW1
Pin 7, 9, 10 and 11
Yes
2
Check reset circuit in
MAIN PCB X-TAL1, UQ1
part ok?
Yes
 Refer to wave pattern
image of Fig. 4-2.
Replace MICOM IC
4-2
All manuals and user guides at all-guides.com
No
IC1P102 Pin 2: 5.6V
No
Q1P105 Pin 3: High
No
No
Replace X-TAL1, UQ1 parts
Check MAIN PCB
Yes
Check MAIN PCB
Check or replace
PT01 (-VP: Pin 13,
+VP: Pin 14)
No
Replace IC1P101
(1203-004520)
No
Replace IC1P101
(1203-004520)
Samsung Electronics