LG LF-U850D User Manual

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TUNER FUNCTION
IC601 (BU4052)2,15PIN INPUT WAVEFORM CHECK
NORMAL OPERATION
U-COM (IC301)83PIN,84PIN COMMUNICATION
CHECK.
Refer to TUNER Troubleshooting and check power (2PIN12Vcheck)
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
TUNER MODULE (TU601) OPERATION 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 STATUS CHECK
NO
REPLACE FAULTY PARTS

LG LF-U850D Specifications

General

Brand	LG
Model	LF-U850D
Category	Stereo System
Language	English