LG LX-D2560A Service Manual page 18

I 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
23 © 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(-)
SW:68(+)67(-) CEN:62(+)61(-)
SL:59(+)58(-) SR:52(+)51(-)
YES
OK
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.
- 3-5 -
NO
Replace the related
NO
Replace the related
NO
Replace the related
NO
Troubleshooting
NO
Check resistance
output of each LINE
part
part
part
Refer to DVD