Checkpoints By Error Mode - Samsung MAX-G55 Service Manual

Troubleshooting
4-1 Checkpoints by Error Mode
4-1-1 No Power
No Power
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 FCN1
Pin 26, 27, 28.
Yes
2
Check reset circuit in
MAIN PCB X-TAL1, UQ1
part ok?
Yes
Replace MICOM IC
4-2
 Refer to wave pattern
image of Fig. 4-1.
No
No
No
No
 Refer to wave pattern
image of Fig. 4-2.
Check MAIN PCB
IC1P102 Pin 3: 5.6V
Yes
Check MAIN PCB
Q1P110 Pin 3: High
Check or replace
PT02 (VFD+: Pin 6,
VFD-: Pin 7, -VP: Pin 10)
Replace X-TAL1, UQ1 parts
No
Replace IC1P101
(1203-004520)
No
Check POWER_ON
Signal Line
Samsung Electronics