LG LF-U850D User Manual

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AUX FUNCTION
IC601 (BU4052)4,11PIN INPUT WAVEFORM CHECK
NORMAL OPERATION
U-COM (IC301)83PIN,84PIN COMMUNICATION CHECK.
MAIN PCB PATTERN DISCONNECTION CHECK
IC601 (BU4052)16PINVDD,8PIN VSS POWER
CHECK
REPLACE APPROPRIATE PARTS
YES
YES
YES
YES
NORMAL
REPLACE APPROPRIATE PARTS
YES
YES
NORMAL
NORMAL
IC602 (MC4580) 4PIN VSS,8PIN VDD POWER
CHECK.
REFER TO SMPS
TROUBLESHOOTING
JK601 CONTACT STATUS CHECK
YES
IC602 (MC4580) 2,6PIN INPUT WAVEFORM CHECK
YES
NO
NO
IC601 (BU4052)3,13PIN OUTPUT WAVEFORM
CHECK
YES
NO
YES
FRONT CN304 MAIN PCB PN302 FFC
WIRE contact and assembly
NO
REPLACE FAULTY PARTS

LG LF-U850D Specifications

General

Brand	LG
Model	LF-U850D
Category	Stereo System
Language	English