LG 47LY96-ZB (CHASSIS:LD75A) Service Manual ▷ View online
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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) Check follow
Does minute
discharge
At Module?
Is output the normality
Low/High voltage except
stand-by 5V?
Is the inverter on?
Check the LCD
Module
Yes
No
Yes
Replace the Power
board.
No
No
Is the LVDS
cable normal?
Reconnect the LVDS cable in P800.
Yes
No
Is the IC700 (FLI8548)
Output normal?
Replace the VSC
No
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4. In case of occur strange screen into specific mode
1) In case of does't display the OSD
(1) Symptom
1) LED is green.
2) The minute discharge continuously becomes accomplished from module
2) The minute discharge continuously becomes accomplished from module
(2) Check follow
Is normal the LVDS
cable?
Replace Power Board.
Is the LVDS cable connected well?
Cable inserts well.
Yes
No
No
Replace FIL8548 IC(IC700).
No
Yes
Is normal the VSC
Board?
Replace VSC B/D
Operates the FIL8548 IC(IC700)?
Yes
No
Yes
Is normal the Ctrl
Board of Module?
Replace Ctrl B/D.
No
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2) In case of does't display the screen into specific mode
(1) Symptom
- The screen does not become the display from specific input mode
(RF, AV, Component, RGB, DVI).
(2) Check follow
(1) Check the all input mode should become normality display.
(1) Check the Video(Main)/Data(Sub), Video(Main)/Video(Sub) should become
(1) Check the Video(Main)/Data(Sub), Video(Main)/Video(Sub) should become
normality display from the PIP mode or DW mode. (Re-Check it Swap)
(3) In case of becomes unusual display from RF mode
Is normal the
Tuner?
Is normal the Input voltage, IIC
Communication and CVBS output?
Replace Tuner
Is the Tuner Cable
connected well?
Cable inserts well.
Yes
No
No
No
Yes
Is normal the
CXA2069Q?
Replace IC
Is normal the Input voltage, IIC
Communication and HV sync?
Yes
No
Yes
Replace IC
Yes
Is normal the
FIL8548?
Is normal the Input voltage, IIC
Communication and HV sync?
No
Block A
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(4) In the case of becomes unusual display from side S-video/AV mode
Is Video input of the
AV Jack (P1400)
normal?
Check the input source.
Is normal the Input voltage,
IICCommunication and HV sync?
Yes
No
No
Replace IC
No
Replace IC
No
Is normal the
CXA2069Q?
Yes
Same as Block A
(5) In the case of becomes unusual display from Component, RGB mode
Is R,G,B input and
H,V Sync of the J1100
normal?
Yes
Check the input source.
No
Same as Block A
(6) In the case of becomes unusual display from HDMI mode
Is normal the
HDMI002 (IC1004)?
Yes
Is normal the Input voltage, IIC
Communication and HV sync?
No
Same as Block A
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