LG 32LT75/76 Service Manual page 15

2. Protect Mode
(1) Symptom
1) After lighting up once, it does not discharge
minutely from module.
2) The rely falls.(there is an audible "click")
3) The color of the front LED turns from green to red.
(2) Procedure check
Is the Power Board
normal ?
Yes
Is the each connector
normal?
Yes
Is the VSC
Board normal?
3. No Raster
(1) Symptom
1) No OSD and image occur at screen.
2) It maintains the condition where the front LED is green.
(2) Procedure check
Does minute
discharge at Module?
Yes
Is the LVDC cable
normal?
Yes
Is the IC700(FLI8548)
Output normal?
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Only for training and service purposes
No
Is the output Low/High voltage normal
except for Stand-by 5V?
No
After connecting each connector do
they operate normally?
No
Is the output voltage normal after
removing P900, P901 of VSC Board?
No
Is the inverter on?
YES
Check the LCD Module
No
Reconnect the LVDS
cable in P1901
No
Replace the VSC.
No
Yes
Yes
No
Is the voltage (P900 5pin
on VSC) 0V or Low?
YES
Replace VSC board.
Is it ok?
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Replace the Power Board.
Replace the connector.
If it operates normally after removing the
P900, P901 : Replace the VSC Board
No
Is the Low/High output voltage
normal except for stand-by 5V?
No
Replace the Power
board
LGE Internal Use Only
YES