LG 42LY99-ZC (CHASSIS:LD75C) Service Manual ▷ View online
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6.1. Auto white Balance
(Set:RS-232, Host:PC, Baud Rate:115200bps, Download:Cortez)
Inside pattern is used when balance is controlled.
Connect as below figure and click the start button on W/B
execution program.
W/B is automatically processing Cool --> Medium --> Warm in
order.
When W/B is completed, you can see ‘OK’ on PC monitor.
Connect as below figure and click the start button on W/B
execution program.
W/B is automatically processing Cool --> Medium --> Warm in
order.
When W/B is completed, you can see ‘OK’ on PC monitor.
6.2. Manual white Balance
- One of R Gain / G Gain / B Gain should be kept on 80, and
others are controlled lowering from 80
1) Press ‘power on’ of the control R/C, set heat run to white by
pressing
G
, and heat run over 15 minutes. (Set : RS-233
Host : PC, Baud Rate : 115200bps, Download : Cortez)
2) Zero Calibrate CA-210, and when controlling, stick the
sensor to the center of LCD module surface.
3) Double click In-start key on Controlling R/C and get in
‘white balance’.
4) Set test-pattern on and display inside pattern. Control is
carried out on three color temperature, COOL, MEDIUM,
WARM. (Control is carried out three times.)
WARM. (Control is carried out three times.)
5) When the R/G/B GAIN is 80 on OSD, it is the FULL
DYNAMIC Range of the Module. In order to control white
balance without the saturation of FULL DYNAMIC Range
and DATA, one of R Gain / G Gain / B Gain should be kept
on 80, and other two is controlled lowering from 80.
balance without the saturation of FULL DYNAMIC Range
and DATA, one of R Gain / G Gain / B Gain should be kept
on 80, and other two is controlled lowering from 80.
* Color Temperature: Cool, Medium, Warm
1) When R GAIN is set to 80
- Control G GAIN and B GAIN by lowering from 80.
2) When B GAIN is set to 80
- Control R GAIN and G GAIN by lowering from 80.
3) When G GAIN is set to 80
- Control R GAIN and B GAIN by lowering from 80.
One of R Gain / G Gain / B Gain should be kept on 80,
and adjust other two lower than 80.
(When R/G/B GAIN are all 80, it is the FULL DYNAMIC
Range of Module)
and adjust other two lower than 80.
(When R/G/B GAIN are all 80, it is the FULL DYNAMIC
Range of Module)
7. Set information(Serial No & Model name)
(1) Setting up like bottom figure (After setting white balance,
this is set)
1) Press ADJ Key in the Adjust remocon.
2) Select “System Control 2” by using
1) Press ADJ Key in the Adjust remocon.
2) Select “System Control 2” by using
D
/
E
(CH+/-) key,
and press
A
(ENTER).
3) Using Adjust remocon, RS-232 Host & Baud Rate &
Download value change (RS-232 Host : PC, Baud
Rate:115200bps, Download:Cortez)
Rate:115200bps, Download:Cortez)
(2) Bar-code scanning
1) Push the menu button in DTV mode.
Select the STATION -> Diagnostics -> To set
2) Check the Serial Number.
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TROUBLESHOOTING
1. No power
(1) Symptom
1) Doesn't minute discharge at module.
2) Non does not come in into the front LED.
2) Non does not come in into the front LED.
(2) Check following
Plug in the power cord.
No
Yes
Is the power cord
pluged in?
Connect the cable.
No
Is the Line Filter
and Power Board Cable
connected?
Replace the fuse.
No
Is the appropriate
Fuse(F101) on Power
Board?
Connect the Cable.
After removing the cables, connect them to the
Power Board (except the SC101 connection
cable), and change the AC voltage marking to
manual.
When ST-BY 5V does not operate, replace the
Power Board.
Power Board (except the SC101 connection
cable), and change the AC voltage marking to
manual.
When ST-BY 5V does not operate, replace the
Power Board.
No
Is the
Power Board and 13P
of VSC Board Cable
connected?
Yes
Yes
Yes
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2. Protect mode
(1) Symptom
1) After lighting up once, it does not discharge minutely from module.
2) The relay falls.(There is an audible “click”.)
3) The color of the front LED turns from green to red.
2) The relay falls.(There is an audible “click”.)
3) The color of the front LED turns from green to red.
(2) Check following
Is the Power
Board normal?
Replace the Power Board.
Is the output the normality Low/High
voltage except Stand-by 5V?
voltage except Stand-by 5V?
Yes
No
No
Is the
each connector
normal?
Replace the connector.
After connecting each connector do
they operate normally?
they operate normally?
Yes
No
No
Is the VSC Board
normal?
If it operates normally after
removing the P900, P901
: Replace VSC Board
removing the P900, P901
: Replace VSC Board
Is the output voltage normal after
removing P900, P901 of VSC Board?
removing P900, P901 of VSC Board?
No
Yes
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 following
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
4-1. In case of does't display the OSD
(1) Symptom
1) LED is green.
2) The minute discharge continuously accomplished from module
2) The minute discharge continuously accomplished from module
(2) Check follow
Is the LVDS
cable normal?
Replace Power Board.
Is the LVDS cable connected?
Re-insert the Cable.
Yes
No
No
Replace the FIL8548 IC(IC700).
No
Yes
Is the VSC Board
normal?
Replace the VSC B/D .
Does the FIL8548 IC(IC700)
operate?
Yes
No
Yes
Is the
Ctrl Board of Module
normal?
Replace the Ctrl B/D.
No
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