LG 37LC2RHA / 37HIZ22 (CHASSIS:LP62F) Service Manual ▷ View online
- 17 -
2. VSC Board
2-1. No Power
(1) Symptom
1) Minute discharge doesn’t occur at module.
2) Front LED doesn’t come into action
2) Front LED doesn’t come into action
(2) Check follow
Is the
Power Cord
plug in ?
Plug in Power Cord
No
No
No
No
Yes
Is the
Line Filter and PSU
connected?
Connect Cable (SC100)
Yes
Is the
Fuse(F100) of PSU
is normal?
Replace Fuse
Yes
Is it
connect that
PSU and 13Pin
cable in VSC
board?
After remove the cable connect to Power Board(except the
CN101 connection cable), authorizes the AC voltage
marking on manual.
When ST-BY 5V does not operate, replace Power Board.
CN101 connection cable), authorizes the AC voltage
marking on manual.
When ST-BY 5V does not operate, replace Power Board.
Connect Cable
Yes
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2-2. No Raster - LCD
(1) Symptom
1) Does’t minute discharge at module.
2) It maintains the condition where the front LED is normal.
2) It maintains the condition where the front LED is normal.
(2) Check follow
Is the Inverter
On or Off
Check the Power board.
Off
No
Is the inverter
24V on power board
normal?
No
No
No
No
Is output
the normality Low/High
voltage except stand-by
5V?
No
'Inverter_On'
Signal is High of 5
th
pin
in P1000 on Main
board
Yes
On
Yes
Is the link cable
normal?
1. Check the Inverter connector.
2. Check the LCD Module.
2. Check the LCD Module.
Yes
1. Check the Main Board.
1. Reconnect the link cable in P804
No
1. Check the Main board.
1. Change the Power Board.
1. Change the Main Board.ß
Yes
Is the Power
Board normal?
Yes
Is the VSC
Board normal?
Is the P804's
output normal?
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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).
2-3. In case of occur strange screen into specific mode
2-3-1. In case of doesn’t display the OSD
(1) Symptom
1) LED is White
2) The minute discharge work continuously
2) The minute discharge work continuously
(2) Check follow
- 20 -
2-3-2. In the case of doesn't work normally at specific input mode
(1) Symptom
- 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)
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 IC300.
No
No
No
No
No
Is the IC300
normal?
Replace IC800.
No
No
Is the IC800
normal?
Is the Tuner Cable
connected well?
Is normal
the Input voltage, IIC
Communication and
CVBS output?
Is the
Input voltage, IIC
Communication and HV
sync normal?
Is the
Input voltage, IIC
Communication and HV
sync normal?
Yes
Replace IC300.
No
No
Is the IC300
normal?
Replace IC800.
No
No
Is the IC800
normal?
Is the
Input voltage, IIC
Communication and HV
sync normal?
Is the
Input voltage, IIC
Communication and HV
sync normal?
(4) When set doesn’t display normally at RF , AV mode
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