LG HT552TH, Service Manual

Page: 10 / 62

2-2
2. FRONT CIRCUIT (1/2)
YES
YES YES
YES
YES
YES
YES
NO NO
Reconnect it.
(Refer to notice *1)
Tuner off the red led? Check if the PN301 is ok?
NO
NO
NO
Refer to smps part.
Check pattern and
resoldering
Is digitron on normally?
Check if all buttons
are ok?
Check if the front
power is ok?(*2)
Check if the DIS301
is ok?
NO
1
Check if the
remotecontrol is ok?
NO
2
Power on.
Front b/d ok.
*1 : When it is needed to reconnected FFC cable into PN301
Short 1pin of PN103 with 18pin of CN901 in amp part
*2 : PN603 Pins.
PIN1 : -35 VKK
PIN2 : -30 FL+
PIN3 : -33 FL-
PIN7 : +5V
PIN13 : +5VA