Samsung LHU30BS, 305TPLUS service manual No Power Main

4-2 No Power (Main)

Does proper DC 6V		No
appear at Pin 1 of
CN601?
	Yes
When Pin 1 of IC601 is DC 6V		No
does proper DC 3.3V appear at
Pin 3 of IC601?
	Yes

4 Troubleshooting

Check Function ass'y.

Check the FP801S at SMPS board

and related circuit

Check IC601 and related circuit.

X-200 oscillate Properly?		No
(Where pin 9 of IC200)
	Yes
		No
Dose proper DC3.3V appear at
pin 34 of IC200
	Yes
		No
Dose proper +18V_Panel at pin
9-12 of CN401
	Yes
		No
Dose proper +24V_IN at
pin 14-16 of CN600
	Yes
Check LCD Panel and replace LCD
Panel

Check X200, IC200 and related

circuit.

Check IC200 and related circuit.

Check IC401 and related circuit

Check +24 output of the SMPS and

related circuit

4-3