Read LG 32LB75 / 32LB76 (CHASSIS:LD73C) Service Manual online
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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.
3) The color of the front LED turns from green to red.
(2) Procedure check
Is the Power
Board normal ?
Replace the Power Board.
Is the output Low/High voltage normal
except for Stand-by 5V?
Yes
No
No
Is the each
connector normal?
Replace the connector.
After connecting each connector do
they operate normally?
No
Yes
Yes
Is the VSC
Board normal?
Is the output voltage normal after
removing P900, P901 of VSC Board?
If it operates normally after removing the
P900, P901 : Replace the VSC Board
P900, P901 : Replace the VSC Board
No
Yes
Does minute
discharge at Module?
Is the LVDC cable
normal?
Is the VAVS on?
Check the LCD Module.
Yes
No
YES
Yes
Reconnect the LVDS
cable in P800.
No
Is the IC700(FLI8548)
Output normal?
Replace the VSC.
No
NO
Replace the
Power board.
Is the Low/High output
voltage normal except for
stand-by 5V?
NO
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) It maintains the condition where the front LED is green.
(2) Procedure check
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