LG 52LB9RF (CHASSIS:LP7AA) Service Manual ▷ View online
- 17 -
Is the LVDS cable
normal?
Is the VSC Board
normal?
IC800' operation
is normal?
Is the Ctrl Board of
Module normal?
Is the LVDS cable
connected well?
Replace cable.
Replace VSC B/D
No
No
Yes
Replace Ctrl Board in Plasma panel
No
Replace LCD Module
No
Yes
Yes
Is the LCD Module
normal?
Yes
Plasma
LCD TV
No
Cable inserts well.
No
Replace FIL8668 IC(IC800).
2. In case of occur strange screen into specific mode
2-1. In case of doesn’t display the OSD
(1) Symptom
1) LED is White
2) The minute discharge work continuously
(2) Check follow
- 18 -
2-2. In the case of doesn't work normally at specific input mode
(1) Symptom
1) The screen doesn't work normally at specific input mode (RF, AV, Component, RGB, HDMI)
(2) Check follow
1) Check the all input model if all input display normally.
2) Check the PIP and Double Window if it display normally.(Re-Check it Swap)
(3) In case of unusual situation from RF mode
Is the Tuner normal?
No
Yes
Yes
Cable inserts well.
Replace Tuner
Replace IC611
Is the Tuner Cable
connected well?
No
Is the Input voltage,
IIC Communication and
HV sync normal?
No
No
Is normal the
Input voltage, IIC
Communication and CVBS
output?
No
No
Is the IC611
normal?
Replace IC800
No
Is the Input voltage,
IIC Communication and
HV sync normal?
No
Is the IC800
normal?
- 19 -
(4) When set doesn’t display normally at RF , AV mode
(5) When set doesn't display nromally at Component, RGB mode
(6) In the case of becomes unusual display from HDMI mode
Yes
Replace IC1200
No
Is the Input voltage,
IIC Communication and
HV sync normal?
No
Is the IC1200
normal?
Replace IC800
No
Is the Input voltage,
IIC Communication and
HV sync normal?
No
Is the IC800
normal?
Replace IC800
No
Is the Input voltage,
IIC Communication and
HV sync normal?
No
Is the IC800
normal?
Yes
Replace IC611
No
Is the Input voltage,
IIC Communication and
HV sync normal?
No
Is the IC611
normal?
Replace IC800
No
Is the Input voltage,
IIC Communication and
HV sync normal?
No
Is the IC800
normal?
- 20 -
3. In case of no sound
(1) Symptom
1) LED is White
2) Screen existent, but Sound isn’t
(2) Check follow
No
No
No
All input(mode)
is no sound?
Only HDMI is
no sound?
Replace IC400
Replace IC401
Replace
VSC B/D
Set on speaker in menu
Download the EDID data
Check the speaker cable
No
Only RF is
no sound?
Check the Tuner In/Out
No
No
No
Replace IC402
No
Is the Speaker
on in Menu?
Yes
Yes
Yes
Is the speaker
cable normal?
Yes
Yes
Yes
Yes
IC1401 operate
normally?
IC1401 operate
normally?
IC402 operate
normally?
Click on the first or last page to see other 52LB9RF (CHASSIS:LP7AA) service manuals if exist.