Pwm Modulation Part - LG FB162-A0U Service Manual

6. PWM MODULATION PART

Check P7905 9PIN 3.3V
YES
Check IC604 PS9829 VDD
PIN power (3,10,22,29,39,47,
56,65,72,87,94) Check X601
2PIN 3.3V
YES
Check if X601 12.288MHz is
working.
YES
Check IC604 PS9829
86 PIN CLK input
YES
Check output of IC100
78KOKF2
21 © PWM_CLK
22 © PWM_DATA
43 © PWM_REST
YES
Check IC604 PS9829 DATA
input
78 PIN © DATA
79 PIN © CLK
96 PIN © REST
YES
Check PWM MODULATOR
output
FL:75(+)74(-) FR:71(+)70(-)
YES
OK
LGE Internal Use Only
NO
Refer to SMPS
Troubleshooting
NO
Check the related part of
X601
YES
OK
NO
Check R668(470Ω) output
YES
OK
Check resistance output of
NO
LINE
DATA: R671
CLK: R670
RST: R665
YES
OK
NO Check DVD ASS`Y PS9829
communication condition (P7403)
YES
Check IC604 PS9829 DATA input
YES
OK
NO
Check IC604 PS9829 part.
4-6
NO
Replace the related
NO
Replace the related
NO
Replace the related
NO
Troubleshooting
NO
Check resistance
output of each LINE
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
part
part
part
Refer to DVD