Read LG 42PM4M-WA (CHASSIS:PM75A) Service Manual online
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TROUBLE SHOOTING GUIDE
1. No Power
(1) Symptom
1) Does not minute discharge at module.
2) Non does not come into the front LED.
2) Non does not come into the front LED.
(2) Procedure check
Check the
Power Board
Power Board
No Power
(Power Indicator OFF)
Check the
Power Board
Power Board
Check the P103
(ST_5V)
Check the P103
(PWR_ON OFF)
Yes
Check the X801
(19.66MHz)
1. Check the IC101
2. Check the All Vcc of IC101
2. Check the All Vcc of IC101
Yes
Check the IC306
(/SYS_RESET)
YES(HIGH)
YES(HIGH)
No(low)
No(low)
Check the X801
No
Check the
Reset IC
Reset IC
No(low)
Plug in the
power cord
power cord
Connect the
cable.(EL11)
Yes
Is the power cord
plugged in?
plugged in?
Yes
Are the line filter and
PSU connected?
PSU connected?
Yes
Is the correct fuse for
the PSU in place?
Plasma(F101)
After remove all cables connected to
PSU(except the CN101), authorizes the AC
voltage marking on manual.
When ST-by 5V does not operate, replace the PSU
PSU(except the CN101), authorizes the AC
voltage marking on manual.
When ST-by 5V does not operate, replace the PSU
Yes
Is the PSU and
13pin cable connected
to the VSC board?
No
No
Replace the
fuse
fuse
No
Connect the
13pin cable.
13pin cable.
No
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