LG 50PG60UR-MA (CHASSIS:PP81A) Service Manual ▷ View online
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9. Adjustment of White Balance
9-1. Purpose and Principle for Adjustment
of the Color Temperature
(1) Purpose: Adjust the color temperature to reduce the
deviation of the module color temperature.
(2) Principle : To adjust the white balance without the
saturation, Fix the one of R/G/B gain to C0 and decrease
the others.
the others.
(3) Adjustment mode: Two modes of Cool and Warm
(Cool data is automatically calibrated by the Medium data)
9-2. Required Equipment
(1) Remote controller for adjustment
(2) Color Analyzer : CA-100+ or CA-210 or same product
(2) Color Analyzer : CA-100+ or CA-210 or same product
- PLASMA TV(ch : 10)
(3) Auto W/B adjustment instrument(only for Auto adjustment)
- Do the white balance adjustment under the 10LUX
[
Notice: When using the Color Analyzer with PDP,
recommend the CA-100 more than CA-210.
If CA-100 can not available, it is also good to use the CA-210.
If CA-100 can not available, it is also good to use the CA-210.
(4) PC (for communication through RGB)
(5) Pattern Generator (MSPG-925FA etc.)
(5) Pattern Generator (MSPG-925FA etc.)
-Before white balance, press the ADJ key 2times and do
the reset like Fig. 4
-To enter White-balance mode, press the ADJ key 2times.
[
Caution: System control Host should be “DDC” for adjustment.
9-3. Connecting Diagram of Equipment for
Measuring
(For Automatic Adjustment)
(1) Enter the adjustment mode of the white balance
- Enter the white balance adjustment mode at the same time
heat-run mode when pushing the power on by power only
key
key
- Maintain the white balance adjustment mode with same
condition of Heat-run
- Maintain after AC off/on in status of Heat-run pattern display
(2) Release the white balance 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)
(3) Enter the adjust mode of white balance
- Enter the white balance adjustment mode with aging
command(F3, 00, FF)
O
Color Temperature & Color Coordinates Setting
- When adjusting the Color Temperature, Color Analyzer CA-
210(Matrix should be corrected through CH10 of CS-1000)
should be used. When CA-210 have used, it don’t need to fit
the CH10.
should be used. When CA-210 have used, it don’t need to fit
the CH10.
- Adjust the Color Temperature based below adjustment color
coordinates.
O
Target Value CA-210(LCD : CH 9, PDP : CH10), CA-100(PDP)
(Standard color coordinate and temperature when using the
CA-100+ or CA210 equipment)
CA-100+ or CA210 equipment)
O
Synchronization relation between PSM and CSM
<Fig. 4>
PSM
Vivid
Mild
CSM
Cool
Warm
- 10 -
O
DDC Adjustment Command Set
[
R/G/B GAIN max value : C0
Adjustment
Adjustment
Adjustment
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9-4. Adjustment of White Balance for
Manual Adjustment
Adjustment mode: Two modes of Medium(Vivid) and Warm
(Cool data is automatically calibrated by the Medium data)
(Cool data is automatically calibrated by the Medium data)
- Equipment : 1) Color analyzer(CA100+, CA210) should be
used in the calibrated ch by CS-1000(.(LCD :
CH9, PDP : CH10)
CH9, PDP : CH10)
2) Adjustment remocon
- For manual adjustment, it is also possible by the following
sequence.
Operate the zero-calibration of the CA-100+ or CA-210, then
stick sensor to the module when adjusting.
Operate the zero-calibration of the CA-100+ or CA-210, then
stick sensor to the module when adjusting.
(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. (recommend)
(If not executed this step, the condition for W/B will be
different)
longer than 15 minutes. (recommend)
(If not executed this step, the condition for W/B will be
different)
(2) Changing to the AV mode by remote control.(Push front-
AV)
(3) Input external pattern(85% white pattern).
(4) Stick sensor to center of the screen and select each items
(4) Stick sensor to center of the screen and select each items
(Red/Green/Blue Gain and Offset) using
D
/
E
(CH +/-) key
on R/C..
(5) Adjust R/ G/B Gain using
F
/
G
(VOL +/-) key on R/C.
(6) Adjust two modes of Medium(Vivid) and Warm as below
figure.
(Fix the one of R/G/B and change the others)
1) Default : Medium(Vivid)
2) Push the “VOL +” key twice : Warm
(Fix the one of R/G/B and change the others)
1) Default : Medium(Vivid)
2) Push the “VOL +” key twice : Warm
[
Refer to the below case to know what value is fixed.
[CASE]
First adjust the coordinate much away from the target value(x, y).
First adjust the coordinate much away from the target value(x, y).
1. x, y > target
1) Decrease the R, G.
2. x, y < target
1) First decrease the B gain,
2) Decrease the one of the others.
2) Decrease the one of the others.
- In case of decreasing the x, decreasing the R : fix G
- In case of decreasing the y , decreasing the G : fix R
- In case of decreasing the y , decreasing the G : fix R
3. x > target , y < target
1) First decrease B, so make y a little more than the target.
2) Adjust x value by decreasing the R
2) Adjust x value by decreasing the R
4. x < target , y > target
1) First decrease B, so make x a little more than the target.
2) Adjust x value by decreasing the G
2) Adjust x value by decreasing the G
(7) When adjustment is completed, Exit adjustment mode
using EXIT key on R/C.
Caution: Each PCB assembly must be checked by check JIG set.
(Because power PCB Assembly damages to PDP
Module, especially be careful)
Module, especially be careful)
10. POWER PCB Assy Voltage
Adjustment
(Va, Vs voltage Adjustment)
10-1. Test Equipment:
D.M.M 1EA
10-2. Connection Diagram for Measuring
Refer to Fig. 5
10-3. Adjustment Method
(1) Va Adjustment
1) After receiving 100% Full White Pattern, HEAT RUN.
2) Connect + terminal of D. M..M. to Va pin of P812,
2) Connect + terminal of D. M..M. to Va pin of P812,
connect -terminal to GND pin of P812.
3) After turning VR901,voltage of D.M.M adjustment as
same as Va voltage which on label of panel right/top
(deviation; ±0.5V)
(deviation; ±0.5V)
(2) Vs Adjustment
1) Connect + terminal of D. M..M. to Vs pin of P812,
connect -terminal to GND pin of P812.
2) After turning VR951 401, voltage of D.M.M adjustment
as same as Vs voltage which on label of panel right/top
( deviation ; ±0.5V)
( deviation ; ±0.5V)
<Fig. 7> Connection Diagram of Power Adjustment for Measuring
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DIAGRAMA EN BLOQUE
Block Diagram (In/Out)
AV1 in
SideAV
in
(AV2 in)
Comp1 in
Comp2 in
RGB in
(D/L)
AV out
CVBS IN
Y/
Pb
/Pr IN
R/G/B/HS/VS IN
CVBS IN
LINE OUT
LINE IN
LINE_MUTE
RS-232C
Rx/
Tx
MX3232
RF
(Tuner)
PC Audio
in
DISPLAY MODULE
EDID NVM
EDID NVM
HDMI1
HDMI2
HDMI3
USB
TMDS351PAG
HDMI MUX
Zoran
VADDIS-966XD
MPEG Decoder
DDR MEM
DDR MEM
SERIAL
FLASH
Mstar
Romeo
LGE6891CD
TW9910
Sub Decoder
NTP3000A
Digital
Audio AMP
MAIN NVM
MC74HC4066
Audio SW
LM324
X4 AMP
SERIAL
FLASH
BD2041
Protect IC
EDID NVM
DDC/HDP/CEC
TMDS(HDMI in)
DDC/HPD/CEC
TMDS(HDMI in)
TMDS(HDMI in)
USB(AV I/O, Data I/O)
+5V
CVBS OUT
656 IN
SW_RESET
PART_I2C
PART_I2C
SW_RESET
I2S OUT
PART_I2C
LVDS
EN
MPEG RX/TX
MPEG RESET
I2S IN
656 IN
TMDS(HDMI in)
DDC/HPD/CEC
DDC/HPD/CEC
[CEC not through HDMI MUX, direct JACK to MAIN IC]
DDC
DDC
DDC
UART_Rx/Tx
AUDIO_SW
LINE IN
LINE IN
LINE IN
Y/
Pb
/Pr IN
LINE IN
Y/C IN
LINE IN
EDID NVM
ROM_I2C
DSUB_DDC
x0.55
x0.55
x0.55
x0.55
S_VIDEO_DET
LINE_MUTE
LINE OUT
CVBS OUT
x4
x4
x0.55
LINE IN
CVBS IN
SIF IN
TUNER_I2C
PART_I2C
ROM_I2C
HDMI_SEL
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