LG HT552TH Service Manual page 10

2. FRONT CIRCUIT (1/2)
Power on.
YES
Tuner off the red led?
YES
Is digitron on normally?
YES
Check if all buttons
are ok?
YES
Check if the
remotecontrol is ok?
YES
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
NO
Check if the PN301 is ok?
NO
Check if the front
power is ok?(*2)
NO
1
NO
2
Check if the DIS301
is ok?
NO
YES
NO
YES
NO
2-2
Reconnect it.
(Refer to notice *1)
Refer to smps part.
Check pattern and
resoldering