DOWNLOAD LG 42PT250-TA (CHASSIS:PA11K) Service Manual ↓ Size: 10.54 MB | Pages: 36 in PDF or view online for FREE

- 9 -

* Caution 

- Color Temperature : COOL, Medium, Warm.
- One of R Gain/G Gain/ B Gain should be kept on 0xC0, and

adjust other two lower than C0.

(when R/G/B Gain are all C0, it is the FULL Dynamic Range

of Module)

* Manual W/B process using adjusts Remote control.
(1) After enter Service Mode by pushing “ADJ” key,
(2) Enter  White  Balance  by  pushing  “

G

”  key  at  “.  White

Balance”

(3) Stick  the  sensor  to  the  center  of  the  screen  and  select

each items(Red/Green/Blue Gain) using 

D

/

E 

(CH +/-) key

on R/C.

(4) Adjust R/G/B Gain using 

F

/

G 

(VOL +/-) key on R/C.

(5) Adjust  three  modes  all(Cool/Medium/Warm)  :  Fix  the  one

of R/G/B Gain and Change the others.

(6) When the adjustment is completed, Enter “COPY ALL”.
(7) Exit adjustment mode using EXIT key on R/C.

* After  You  finish  all  adjustments,  Press  °∞In-start°± button

and  compare  Tool  option  and  Area  option  value  with  its
BOM, if it is correctly same then unplug the AC cable.

If  it  is  not  same,  then  correct  it  same  with  BOM  and  unplug
AC cable.
For correct it to the model’s module from factory JIG model.

* Push  The  “N  STOP  KEY”  after  completing  the  function

inspection. And Mechanical Power Switch must be set “ON”. 

* To  check  the  coordinates  of  White  Balance,  you  have  to

measure at the below conditions.

Picture  mode  :  Vivid,  Energy  Saving  :  Off,  Below  the
Advanced control, Dynamic Contrast : Off, Dynamic Colour :
Off 
Colour Temp. 

-> Picture Mode change : Vivid ? Vivid(User)

* Check if Power LED Color and Power Consumption operate

as standard. 

(1) Set Input to RGB and connect D-sub cable to set
(2) Measurement Condition: (100~240V@ 50/60Hz)
(3) Confirm  DPM  operation  at  the  state  of  screen  without

Signal

(1) Connect D-sub Signal Cable to D-Sub Jack.
(2) Write  EDID  DATA  to  EEPROM  (24C02)  by  using  DDC2B

protocol.

(3) Check whether written EDID data is correct or not.

* For  SVC  main  Ass’y,  EDID  have  to  be  downloaded  to

Insert Process in advance.

(1) Connect HDMI Signal Cable to HDMI Jack.
(2) Write  EDID  DATA  to  EEPROM(24C02)  by  using  DDC2B

protocol.

(3) Check whether written EDID data is correct or not.

* For  SVC  main  Ass’y,  EDID  have  to  be  downloaded  to

Insert Process in advance.

(1) All Data : HEXA Value
(2) Changeable Data :

*: Serial No : Controlled / Data:01
**: Month : Controlled / Data:00
***:Year : Controlled
****:Check sum

(1) Press Adj. key on the Adj. R/C,
(2) Select EDID D/L menu.
(3) By pressing Enter key, EDID download will begin
(4) If Download is successful, OK is display, but If Download is

failure, NG is displayed.

(5) If Download is failure, Re-try downloads.

*Caution: Never  connect  HDMI  &  D-sub  Cable  when  EDID

downloaded.

O 

Edid data and Model option download (RS232)

NO

Item

CMD 1 CMD 2 Data 0

Enter  

download     A

A

0     0 When transfer the

download 

‘Mode In’

‘Mode In’

Mode

Carry the 

command.

EDID data download

A 

E

00  10 Automatically

Model

download

option

(The use of 

download

a internal pattern)

- 10 -

* Caution

* Use the proper signal cable for EDID Download

- Analog EDID : Pin3 exists
- Digital EDID : Pin3 exists

* Caution: 

- Never connect HDMI & D-sub Cable at the same time.
- Use the proper cables below for EDID Writing.
- Download  HDMI1,  HDMI2  separately  because  HDMI1  is

different from HDMI2.

(1) 2D - HD RGB EDID data

(2) 2D - HD HDMI1 EDID data

(3) 2D - HD HDMI2 EDID data

(4) 2D - HD HDMI3 EDID data

ⓐ Vender ID

O 

Checksum: Changeable by total EDID data.

No.

Item

Condition

Hex Data

1

Manufacturer ID

GSM

1E6D

2

Version

Digital : 1

01

3

Revision

Digital : 3

03

- 11 -

(1) Press the EYE Key on the adjustment remote controller.
(2) Check  the  Sensor  DATA  (  It  must  be  under  10)  and  keep

the data longer than 1.5s

(3) Check ‘OK’

(Sensor DATA 0 ~ 4095, Power Saving Mode 0 ~ 12)

* IF you press IN-STAP Button, change Green Eye-check OSD.

* This test is to check Network operation.
(1) Connect LAN cable from Computer to TV Set
(2) When  network  operates  normally,  you  can  see  “OK”  on

Computer

(Pattern  Generator  MSPG-3233,  HDMI  mode  NO.  371  ,

pattern No. 81)

(1) Please input 3D test pattern like below

(2) Enter 3D mode , then select side by side

(If  you  don’t  wear  a  3D  Glasses,  you  will  see  the  picture
like below)

(3) Put on the 3D Glasses, And block the right side of Glasses 

(LEFT:OPEN[TEST], RIGHT:CLOSED)
And  check  the  middle  sides  of  picture  ,  RED  ->  normal  ,
others -> abnormal

(4) Put on the 3D Glasses, And block the right side of Glasses 

(LEFT:CLOSED, RIGHT:OPEN[TEST])
And  check  the  middle  sides  of  picture  ,  BLUE  ->  normal  ,
others -> abnormal

(1) Press  “Power  on”  key  of  service  remocon.(Baud  rate  :

115200 bps)

(2) Connect RS232 Signal Cable to RS-232 Jack.
(3) Write Serial number by use RS-232.
(4) Must  check  the  serial  number  at  signal  test  of  customer

support. (Refer to below).

- 12 -

CMD

: A0h 

LENGTH : 85~94h (1~16 bytes)
ADH

: EEPROM Sub Address high (00~1F)

ADL

: EEPROM Sub Address low (00~FF)

Data

: Write data

CS

: CMD + LENGTH + ADH + ADL + Data_1 + ... + 

Data_n

Delay

: 20ms

[Description]

FOS Default write : <7mode data> write
Vtotal,  V_Frequency,  Sync_Polarity,  Htotal,  Hstart,  Vstart,
0, Phase
Data  write  :  Model  Name  and  Serial  Number  write  in
EEPROM,.

(1) Serial number D/L is using of scan equipment.
(2) Setting  of  scan  equipment  operated  by  Manufacturing

Technology Group.

(3) Serial number D/L must be conformed when it is produced

in production line, because serial number D/L is mandatory
by D-book 4.0

* Manual Download (Model Name and Serial Number)

- If  the  TV  set  is  downloaded  By  OTA  or  Service  man,

Sometimes  model  name  or  serial  number  is  initialized.(
Not always)

- There  is  impossible  to  download  by  bar  code  scan,  so  It

need Manual download.

1) Press the ‘instart’ key of ADJ remote controller.
2) Go to the menu ‘5.Model Number D/L’ like below photo.
3) Input the Factory model name(ex 42LD450-TA) or Serial

number like photo.

4) Check  the  model  name  Instart  menu  ?  Factory  name

displayed (ex 42LD450-TA)

5) Check  the  Diagnostics  (DTV  country  only)  ?  Buyer

model displayed (ex 42LD450)

(1) Press  "Power  on"  button  of  a  service  R/C.(Baud  rate  :

115200 bps)

(2) Connect RS232-C Signal Cable.
(3) Write CI+ Key through RS-232-C.
(4) Check whether the key was downloaded or not at ‘In Start’

menu. (Refer to below)

-> Check the Download to CI+ Key value in LGset. 

(1) check the method on Instart menu