LG CMS2521F Service Manual

8. LCD DISPLAY CHECK
LCD abnormal
Check SMPS part.
Normal.
YES
NO
NO
Check R310 ~ R312.
Check CON301 flat film wire.
Check chip bead FB313.
NO
NO
YES
YES
YES
YES
YES
Check IC301
Pin1 “LCD-CS”,Pin3 “LCD-WR”
Pin4 “LCD-DATA”
signal.
Check
CON301 Pin4 “VFD_CLK”,
Pin3 “VFD_DATA”, Pin2 “VFD_STB”
signal.
Check
IC301 Pin7 VCC
(3.3V).
Check
CON301 Pin9.
IC301
normal?
Replace IC301.
NO
3-10
ELECTRICAL TROUBLESHOOTING GUIDE

LG CMS2521F Specifications

General

Brand	LG
Model	CMS2521F
Category	Stereo System
Language	English