Read LG 32LC4D (CHASSIS:LT73A) Service Manual online
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2. Protect mode
(1) Symptom
1) After lighting once it does not discharge minutely
from module.
2) The relay falls.(There is an audible “Click”.)
3) The color of the front LED turns from green to red.
3) The color of the front LED turns from green to red.
(2) Check following
Is the Power Board
normal ?
Replace Power Board.
Is output the normality Low/High
voltage except Stand-by 5V?
voltage except Stand-by 5V?
Yes
No
No
Are the
each connector
normal?
Replace the connector.
After remove P900 normal operation,
replace VSC Board.
replace VSC Board.
After Checking each connector does
is operate corretly?
is operate corretly?
Yes
No
No
Is the VSC-Board
normal?
Is the output voltage normal after
remove P900, P901 of VSC-B/D?
remove P900, P901 of VSC-B/D?
No
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) Check following
Check the LCD Module
Replace the
Power board.
Power board.
Does
minute discharge
at Module?
Is the inverter on?
Is output the normality
Low/High voltage
except Stand-by 5V?
Low/High voltage
except Stand-by 5V?
Yes
No
No
Is the LVDS cable
normal?
Yes
Is the
IC700(FLI8548)
output normal?
Reconnect the LVDS cable in P800.
No
Replace the VSC.
No
Yes
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