LG 52LG70YR-TA (CHASSIS:LP81D) Service Manual ▷ View online
5. Adjusting the White Balance
5.1 Purpose and Principle for adjustment of the
color temperature
- Purpose : Adjust the color temperature to reduce the
deviation of the module color temperature.
- Principle : To adjust the white balance without the
saturation,
(Fix the one of R/G/B gain to C0 and decrease the others.)
5.2 Adjustment mode : Two modes of Cool and Warm
(Medium data is automatically calibrated by the
Cool data)
O
Required Equipments
- Remote controller for adjustment
- Color Analyzer : CA100+ or CA-210 or same product
- Color Analyzer : CA100+ or CA-210 or same product
LCD TV(ch : 9)
- Auto W/B adjustment instrument(only for Auto adjustment)
5.3 Connecting diagram of equipment for
measuring (For Automatic Adjustment)
(1) Enter the adjustment mode of DDC
- Set command delay time : 50ms
- Enter the DDC adjustment mode at the same time heat-
- Enter the DDC adjustment mode at the same time heat-
run mode when pushing the power on by power only
key.
key.
- Maintain the DDC adjustment mode with same condition
of Heat-run
-> Maintain after AC off/on in status of Heat-run pattern
display)
(2) Release the DDC adjustment mode
- Release the adjust mode after AC off/on or std-by off/on
in status of finishing the Hear-run mode
- Release the Adjust mode when receiving the aging off
command(F3 00 00) from adjustment equipment
- Need to transmit the aging off command to TV set after
finishing the adjustment.
- Check DDC adjust mode release by exit key and
release DDC adjust mode
(3) Enter the adjust mode of white balance
- Enter the white balance adjustment mode with aging
command(F3, 00, FF)
* Luminance min value is 200cd/ß
≥
in the cool mode(For
LCD)
6. Adjustment of White Balance for
Manual adjustment
• Adjustment mode : Two modes (Cool and Warm)
(Medium data is automatically calibrated by the Cool data)
• Color analyzer(CA100+, CA210) should be used in the
(Medium data is automatically calibrated by the Cool data)
• Color analyzer(CA100+, CA210) should be used in the
calibrated ch by CS-1000
(LCD : CH9, PDP : CH10)
• Operate the zero-calibration of the CA100+ or CA-210, then
stick sensor to the module when adjusting.
• For manual adjustment, it is also possible by the following
sequence.
1) Select white pattern of heat-run by pressing "POWER ON"
key on remote control for adjustment then operate heat run
longer than 15 minutes.
longer than 15 minutes.
(If not executed this step, the condition for W/B may be
different.)
different.)
2) Push "Exit" key.
3) Change to the AV mode by remote control.(Push front-AV
3) Change to the AV mode by remote control.(Push front-AV
or Input key)
4) Input external pattern(85% white pattern)
5) Push the ADJ key two times (entering White Balance
5) Push the ADJ key two times (entering White Balance
mode)
6) Stick the sensor to the center of the screen and select
each items (Red/Green/Blue Gain and Offset) using
/
(CH +/-) key on R/C..
7) Adjust R/ G/ B Gain using
/
(VOL+/-) key on R/C.
8) Adjust two modes (Cool and Warm)
(Fix the one of R/G/B and change the others)
9) When adjustment is completed, Exit adjustment mode
using EXIT key on R/C.
- 13 -
C
2008
TROUBLE SHOOTING
- 14 -
C
2008
1) Symptom
1) It is not discharged minutely from the module.
2) Light does not come into the front LED.
2) Light does not come into the front LED.
2) Check process
1. No power
No
Yes
Is plug in
Power cord inserted?
After all cables connect is
removed to PSU.
The AC voltage marking is
authorized on manual.
When ST-By 5V is not operated.
replace PSU.
Plug in power cord
No
Yes
Is the Line Filter
and PSU connected?
Connect a cable to SC100
No
Yes
Is the fuse of
PSU normal?
F101
Replace the fuse.
No
Yes
Is it connected that
PSU and P1100 in
Main Board
Connect a cable P1100
C
2008
- 15 -
1) Symptom
1) No OSD and image occur at screen.
2) It maintains the condition where the front LED is green
.
2) Check process
2. No Raster
No
No
No
No
No
Yes
Yes
Yes
CN700(PDP/LCD)
Replace the VSC.
Does mimute
discharge a Module?
Is the Link cable
normal?
Is the IC801 and
IC1300’s output normal?
Check the LCD Module
Reconnect the
Panel line cable
(P1500, P1501)
(P1500, P1501)
Is the inverter
/VaVs on?
Is output the normality
Low/High voltage
except Stand-by 5V?
Replace the
Power board
Power board
C
2008
- 16 -
1) Check process
3. Unusual display from RF mode.
No
Yes
Yes
No
No
Is Video output of the
Tuner normal?
(Check TU500_Pin13)
Is the
Input voltage normal?
(Check Pin3)
Block A
Is the I2C communication normal?
(Check Pin9, Pin10)
No
Yes
Is the LVDS
cable connected well?
Change the IC(IC801)
Check the power
Cable inserts well
Check the Tuner
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