LG 32PC5RV-TD (CHASSIS:PP78F) Service Manual ▷ View online
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TROUBLESHOOTING
1. No power
(1) Symptom
1) Minute discharge does not occur at module.
2) Front LED does not activate.
2) Front LED does not activate.
(2) Press check
Plug in the power cord
Start Check
No
Yes
Is the power cord
plugged in?
plugged in?
Connect the cable.
Plasma(CN1)
Plasma(CN1)
No
Yes
Are the line filter and
PSU connected?
PSU connected?
Replace the fuse.
No
Yes
Is the correct fuse for
the PSU in place?
Plasma(F101)
Connect the 15pin cable.
Next remove all cables connected to the PSU and
switch the AV voltage to manual.
If the ST-by 5V does not operate, replace the PSU.
switch the AV voltage to manual.
If the ST-by 5V does not operate, replace the PSU.
No
Yes
Is the PSU and 15pin
cable connected to the
VSC board?
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2. Protect mode
(1) Symptom
1) After lighting once it does not discharge minutely from the module.
2) The relay falls.(there is an audible “Click”.)
3) The color of the front LED turns from green to red.
2) The relay falls.(there is an audible “Click”.)
3) The color of the front LED turns from green to red.
(2) Follow check
Is the Power Board
normal ?
Replace Power Board.
Is the output the normal Low/High
voltage except for the Stand-by 5V?
voltage except for the Stand-by 5V?
Yes
No
No
Are all the connectors
normal?
Replace the connector.
Replace the fuse.
Replace the Y-Board.
After checking each connector does
is operate correctly?
is operate correctly?
Yes
No
No
Is the Y-Board
normal?
Is the
appropriate
fuse (FS2,FS1) on the
Y-B/D?
Is the output voltage
normal after removing the
P1 connector of the Y-B/D?
normal after removing the
P1 connector of the Y-B/D?
Yes
No
No
Is the X- Board
normal?
Is the
output voltage normal
after removing the P11, P12,
P13 connector of
the X-B/D?
After removing the P12 and the output
voltage is normal : Replace the Right X-B/D
After removing the P11, P13 and the output
voltage is normal : Replace the Left X-B/D
voltage is normal : Replace the Right X-B/D
After removing the P11, P13 and the output
voltage is normal : Replace the Left X-B/D
No
Yes
Start Check
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3. No Raster
(1) Symptom
1) No OSD or image are displayed on the screen.
2) The front LED remains green.
2) The front LED remains green.
(2) Follow check
Check the PDP Module
Replace the
Power board.
Power board.
Does
minute discharge
at Module?
Is the inverter
/VaVs on?
Is output the normal
Low/High voltage except
for the Stand-by 5V?
Low/High voltage except
for the Stand-by 5V?
Yes
No
No
Is the output for the
IC500 normal?
Replace the VSC.
No
Yes
Start Check
4. In the case an unusual display in RF mode.
Check the power.(L1103)
Is the
video output of the
Tuner normal? (Check
TU400_Pin13)
Is the
input voltage
normal?(Check
Pin3)
Is the I2C communication normal?
(Check Pin9, Pin10)
(Check Pin9, Pin10)
Yes
No
Yes
Is the LVDS
Pattern connected?
Yes
Change the IC(IC500)
Connect again
the Pattern.
No
No
Check the Tuner.
No
A
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5. In the case of an unusual display in rear AV mode.
Is video input of
the A/V jack normal?
(Check R113)
Yes
Sam as Block A
Check the input source.
No
6. In the case of an unusual display in component 1 mode.
Is the video
input of the A/V jack
normal? (Check R235,
R236,R250)
Yes
Change the IC(IC500)
Check the input source.
No
7. In the case of an unusual display in component 2 mode.
Yes
Change the IC(IC500)
Check the input source.
No
Is the video
input of the A/V Jack
normal? (Check R243,
R244, R245)
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