LG CJS45F Service Manual

No 12 V
Is Vcc (15 V)
supplied to IC931?
Check or replace D935.
YES
YES
NO
IC931 pin4 “H”?
Check P-CTRL “H” signal from MCU.
YES
NO
Check or replace IC931.
No VFD
YES
D931 normal?
ZD931 normal?
Q300 / Q301 normal?
Check or replace D931.
Check or replace ZD931.
Check or replace Q300 / Q301.
YES
YES
YES
NO
NO
NO
Check or replace VFD.
3-19
ELECTRICAL TROUBLESHOOTING GUIDE
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LG CJS45F Specifications

General

Brand	LG
Model	CJS45F
Category	Stereo System
Language	English