LG LAC-M0510, Service Manual

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- 2-2 -
YES
YES
YES
YES
YES
YES
(2) LCD LIGHT ABNORNAL.
Any Key power on.
(without DISC)
Do display LCD then light?
Check voltage in the power supply
circuitry.
Power supply circuitry defective.
Q371,Q372,IC403
• Reset circuit defective.
IC201 Surrounding circuit
defective.
• IC401 pin89 defective.
X401, X422, C412,
C413, C415, C416.
Q260, PN401 front
PCB pattern defective.
IC401, Pin66, 67, 87
front PCB pattern defective.
IC901, Surrounding circuit
PCB pattern defective.
Is u-com IC401 reset circuit
normal? Pin88
Is u-com IC401 keyin Pin9, 37, 51,
52, 64 5volt input?
Is u-com IC401 Pin 66,67,87
output waveform normal?
Is IC901 Com1, Com2, Com3
output waveform normal?
Display LCD connector defective.
Is u-com IC401X1, X2 terminal
Pin38,39,41,42 input?
OSC : 12.5MHz
OSC : 32.768kHz
NO
NO
NO
NO
NO
NO
NO