LG LMS-K3960V, Service Manual

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- 2-5 -
P7905 9PIN 3.3V check
X601 12.288MHz operation
check
IC604 PS9829
86 PIN CLK input check
IC100 78KOKF2
21
➞
PWM_CLK
22
➞
PWM_DATA
23
➞
PWM_REST
output check
IC604 PS9829 DATA input
check
78 PIN
➞
DATA
79 PIN
➞
CLK
96 PIN
➞
REST
PWM MODULATOR output
check
FL:75(+)74(-)FR:71(+)70(-)
SW:68(+)67(-)CEN:62(+)61
(-) SL:59(+)58(-)SR:52(+)51(-)
normal
IC604 PS9829 VDD PIN
Power check
(3.10.22.29.39.47.56.65.72.
87. 94)
Refer to SMPS
Troubleshooting
relevant parts check X604
12.288MHz
normal
R668(470
Ω
) output check
normal
LINE resistance check
DATA:R671 CLK:R670
RST:R665
normal
DVD ASS`Y PS9829 commu-
nication status check(P7403)
IC604 PS9829 DATA input check
normal
IC604 PS9829 parts check
relevant parts
replacement
relevant parts
replacement
relevant parts
replacement
Refer to DVD
Troubleshooting
Check each line
resistance check
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
■
PWM ALTERATION PART CHECK