LG OM7560 Service Manual page 43

ELECTRICAL TROUBLESHOOTING GUIDE
No LED
YES
Is Vcc (DVCC_3.3V)
supplied to IC103?
YES
Is LED_5V & F_LED_12V is normal?
YES
Check or replace IC931.
No VFD
YES
VFD_12V is normal?
YES
DVCC_5V & 3.3V is normal?
YES
VFD_CLK, STB, DO is normal?
YES
Check or replace VFD.
NO
Check or replace IC505
NO
Check or replace IC207, Q210 & Q209.
NO
Check or replace Q209, Q210.
NO
Check or replace Q204 & Q205, IC505.
NO
Check or replace R808, R811, R814.
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