DOWNLOAD LG 42PG20R-TA (CHASSIS:PP81A) Service Manual ↓ Size: 10.36 MB | Pages: 28 in PDF or view online for FREE

- 10 -

(1)  As  above  Fig.  3,  Connect  the  Set,  EDID  Download  Jig,,

PC & Cable

(2) Turn  on  the  PC  &  EDID  Download  Jig.  And    Execute  the

S/W : EDID TESTER Ver.2.5

(3) Set up the S/W option 

Repeat Number : 5
Device Address : A0
PageByte : 8

(4) Power on the Set

1) Sequence of Adjustment

1. DDC data of Analog-RGB

(1) Init the data 

(2) Load the EDID data.(Open File).

[Analog - RGB    : PP81A_RGB.ANA]
[Digital  - HDMI1 : PP81A_HDMI1.DVI]
[Digital  - HDMI2 : PP81A_HDMI2.DVI]
[Digital  - HDMI3 : PP81A_HDMI3.DVI]

(3) Set the S/W as below.

(4) Push the “Write Data & Verify” button. And confirm “Yes”.

(5) If the writing is finished, you will see the “OK”  message. 

(High-Bandwidth Digital Contents Protection)

(1) Connect D-sub Signal Cable to D-Sub Jack
(2) Input HDCP key with HDCP-key- in-program
(3) HDCP  Key  value  is  stored  on  Main  M-STAR

IC(LGE6891DD)  which  is  0x80~0x90  addresses  of
0x00~0x01  page(EEPROM  MAP  PAGE0~PAGE1  /
START :A080)

(4) Play the Equipment(DVD Player) included HDCP Key and

confirm  whether  picture  is  displayed  or  not  of  using  DVD
Player.

(5) HDCP Key value is different among the sets

Open File

Open File

- 11 -

(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.

(3) Adjustment mode: Two modes of Cool and Warm

(Cool data is automatically calibrated by the Medium data)

(1) Remote controller for adjustment 
(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.

(4) PC (for communication through RGB) 
(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.

(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

-  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.

-  Adjust  the  Color  Temperature  based  below  adjustment  color

coordinates.

O

Target Value CA-210(PDP : CH10), CA-100(PDP)

(Standard  color  coordinate  and  temperature  when  using  the
CA-100+ or CA210 equipment)

O

Synchronization relation between PSM and CSM

<Fig. 4>

Color Coordinate

x

y 

0.293±0.002

0.329±0.002

9,300K

6,500K

0.000

0.003

0.285±0.002

0.313±0.002

MEDIUM

WARM

Mode

Temp

uv

CSM

Remark

Cool

Warm

Vivid

Mild

PSM

- 12 -

O

DDC Adjustment Command Set 

[ R/G/B GAIN max value : C0

Adjustment mode: Two modes of Medium(Vivid) and Warm
(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)

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.

(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)

(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

(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

[ Refer to the below case to know what value is fixed.

[CASE]
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.

- In case of decreasing the x, decreasing the R : fix G
- 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

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

(7)  When  adjustment  is  completed,  Exit  adjustment  mode

using EXIT key on R/C.

Adjustment

content

Aging On/Off

input select

R GAIN

G GAIN

B GAIN

R GAIN

G GAIN

B GAIN

R GAIN

G GAIN

B GAIN

CSM modo

EEPROM Read

EEPROM Write

No

1

2

3

4

5

6

CMD

(HEX)

F3

F4

16

18

1A

16

18

1A

16

18

1A

F2

E7

E8

ADR

00

00

00

01

02

00

00

00

VALUE

FF/00

00 - FE

00 - FE

00 - FE

00 - FE

00 - FE

00 - FE

00 - FE

00 - FE

00 - FE

00

01

02

00

data

Detail

OO : OFF

01  : ON

FF  : WB Ready

0x10 : TV

0x20 : AV1

0x21 : AV2

0x23 : AV3

0x40 : Component1

0x41 : Component2

0x60 : RGB PC

0x90 : HDMI1

0x91 : HDMI2

0x92 : HDMI3

GAIN Adjsutment

CSM COOL

GAIN Adjsutment

CSM MEDIUM

GAIN Adjsutment

CSM WARM

COOL

MEDIUM

WARM

EEPROM read

EEPROM write

Color Coordinate

x

y 

0.293±0.002

0.329±0.002

9,300K

6,500K

0.000

0.003

0.285±0.002

0.313±0.002

MEDIUM

WARM

Mode

Temp

uv

- 13 -

(Default values maybe modified the module condition)

(1) AC on tilme on only one after assembled automatically
(2) CH recover SVC OSD manually

Caution: Each PCB assembly must be checked by check JIG set.

(Because  power  PCB  Assembly  damages  to  PDP
Module, especially be careful)

(Va, Vs voltage Adjustment)

D.M.M 1EA

Refer to Fig. 5

1) After receiving 100% Full White Pattern, HEAT RUN.
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)

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)

<Fig. 5> Connection Diagram of Power Adjustment for Measuring

Item

Dielectric Voltage (AC <-> FG)

Dielectric Voltage (Without FG)

Value

1.5

1.5

3

3

Unit

kV

kV

Remark

At 100mA for 1sec (Line)

At 100mA for 1min (OQC)

At 100mA for 1sec (Line)

At 100mA for 1min (OQC)

Item

Min

Typ

Max

Unit

Remark

Audio Practical Max Output, L(Mono)/R

9

10

12

W