LG MCV903 Series Service Manual

3-13
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Check IC604
PS9830 VDD
PIN power(3,10,
22,29,39,47,56,65,
72,87,94)
Check the power of both
terminals of R667 120 Ω
Check the power at both
terminals of FB607
Check the both terminals
of R118 100 Ω HIGH
Replace the
related
Replace the
related
YES
YES YES
Check the
X601 12.288MHz
operation
NO
YES
Check the
IC604 PS9829 86
PIN(12.288MHz)
CLK input
Check
the IC604 87,86
PIN power 1.6V
operation
YES
Check X601
12.288MHz
Check
IC505 output power
3 3V
IC505
POWER CONT
HIGH
NO
Replace the
related part
NO
Replace the
related part
NO
NO
Check IC100
83 PIN POWER
CONT HIGH
NO
NO
NO
YES
YES
OK
OK
YES
YES
YES
OK
YES
OK
Check
the IC505 output
power
YES
YES
YES
IC100
87F5NC8A
79 → PWM_CLK
80 → PWM_DATA
3 → PWM_REST
Check the
output
REST check
YES
Replace the
related part
NO
Replace the
related part
Check the
communication
waveform of both
terminals of R670
CLK ,R671
DATA
Check
the output waveform
at both terminals of
R665
NO
YES
OK
YES
OK
YES
OK
REST
PWM_DATA
PWM_CLK
NO

LG MCV903 Series Specifications

General

Brand	LG
Model	MCV903 Series
Category	Stereo System
Language	English