DOWNLOAD LG 37LF65 (CHASSIS:LD75A) Service Manual ↓ Size: 10.11 MB | Pages: 54 in PDF or view online for FREE

Model
37LF65 (CHASSIS:LD75A)
Pages
54
Size
10.11 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD
File
37lf65-chassis-ld75a.pdf
Date

LG 37LF65 (CHASSIS:LD75A) Service Manual ▷ View online

- 25 -
2. Protect mode
(1) Symptom
1) After once shining, it does not discharge minutely from module. 
2) The relay falls.(The sound is audible “Click”.)
3) It is converted with the color where the front LED is red from green.
(2) Check follow
Is normal the Power
Board?
Replace Power Board.
Is output the normality Low/High
voltage except Stand-by 5V?
Yes
No
No
Is normal the each
connector?
Replace connector.
After connecting well each connector,
the normality it operates? 
Yes
No
No
Is normal the VSC
Board?
After remove P900, P901
normal operation: 
Replace VSC Board
Is normal the output voltage after
remove P900, P901 of VSC Board?
No
Yes
- 26 -
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) 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
- 27 -
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) 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
- 28 -
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
- Check the all input mode should become normality display.
(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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