DOWNLOAD LG 19LS4D (CHASSIS:LD83A) Service Manual ↓ Size: 4.33 MB | Pages: 24 in PDF or view online for FREE

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This specification sheet is applied to all of the LCD TV with
LD83A chassis.

(1) The  adjustment is according to the order which is

designated and which must be followed, according to the
plan which can be changed only on agreeing.

(2) Power Adjustment: Free Voltage
(3) Magnetic Field Condition: Nil.
(4) Input signal Unit: Product Specification Standard
(5) Reserve after operation: Above 5 Minutes (Heat Run)

Temperature : at 25±5ºC 
Relative humidity : 65±10%
Input voltage : 220V, 60Hz

(6) Adjustment equipments: Color Analyzer (CA-210 or CA-

110), Pattern Generator (MSPG-925L or Equivalent), DDC
Adjustment Jig equipment, SVC remote controller

(7) Push the “IN STOP KEY” - For memory initialization

Case 1 : Software version up

1) After downloading S/W by USB, TV set will reboot

automatically

2) Push “In-stop” key
3) Push “Power on” key
4) Function inspection
5) After function inspection, Push “In-stop” key.

Case2 : Function check at the assembly line

1) When TV set is entering on the assembly line, Push

“In-stop” key at first.

2) Push “Power on” key for turning it on.

-> If you push “Power on” key, TV set will recover

channel information by itself.

3) After function inspection, Push “In-stop” key.

* APC - After Manual-Insult, executing APC

1) Execute ISP program “Mstar ISP Utility” and then click

“Config” tab.

2) Set as below, and then click “Auto Detect” and check “OK”

message. If display “Error”, Check connect computer, jig,
and set.

3) Click “Connect” tab. If display “Can’t”, Check connect

computer, jig, and set.

4) Click “Read” tab, and then load download file(XXXX.bin) by

clicking “Read”.

5) Click “Auto” tab and set as below
6) Click “Run”.
7) After downloading, check “OK” message.  

1) Put the USB Stick to the USB socket 
2) Automatically detecting update file in USB Stick

- If your downloaded program version in USB Stick is Low,

it didn’t work. But your downloaded version is High, USB
data is automatically detecting

3) Show the message “Copying files from memory”

4) Updating is staring.
5) Updating Completed, The TV will restart automatically.
6) If your TV is turned on, check your updated version and

Tool option. (explain the Tool option, next stage)

* If downloading version is more high than your TV have,

TV can lost all channel data. In this case, you have to
channel recover. if all channel data is cleared, you didn’t
have a DTV/ATV test on production line.

(1)

(3)

(2)

 OK

Please Check Speed :
To us speed between from 200 KHz
to 400 KHz

(4)

filexxx.bin

(5)

(7) ........ OK

(6)

filexxx.bin

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1) Push "IN-START" key in service remote controller 
2) Select "Tool Option 1" and Push “OK” button
3) Punch in the number. (Each model has their number.)
3) Completed selecting Tool option

1) Auto RGB Gain/Offset Adjustment

- Convert to PC in Input-source
- Signal equipment displays

Output Voltage : 700 mVp-p
Impress Resolution XGA (1024 x 768 @ 60Hz) 
Model : 60    in Pattern Generator
Pattern : 65   in Pattern Generator (MSPG-925 Series)

- Adjust by commanding AUTO_COLOR_ADJUST.

2) Confirmation

- We confirm whether “0xAA(RGB)” address of

EEPROM “0xA2” is “0xAA” or not. 

- If “0xAA(RGB)” address of EEPROM “0xA2” isn’t

“0xAA”, we adjust once more

- We can confirm the ADC values from “0xA4~0xA9

(RGB)” addresses in a page “0xA2”

* Manual ADC process using Service Remote control.

After enter Service Mode by pushing “ADJ” key,
execute “ADC Adjust” by pushing “

G

” key at “ADC

CALIBRATION: RGB-PC”.

1) Component Gain/Offset Adjustment

- Convert to Component in Input-source
- Signal equipment displays

Impress Resolution 480i
MODEL : 209   in Pattern Generator(480i Mode)
Pattern : 65   in Pattern Generator (MSPG-925 series)

Impress Resolution 1080i
Model : 223   in Pattern Generator(1080i Mode)
Pattern: 65   in Pattern Generator(MSPG-925 series)

- Adjust by commanding AUTO_COLOR_ADJUST.

2) Confirmation

- We confirm whether “0xB3 (480i)/0xBC (1080i)”

address of EEPROM “0xA2” is “0xAA” or not.

- If “0xB3 (480i)/0xBC(1080i)” address of EEPROM

“0xA2” isn’t “0xAA”, we adjust once more.

- We can confirm the ADC values from “0xAD~0xB2

(480i)/0xB6~BB (1080i)” addresses in a page “0xA2”.

* Manual ADC process using Service Remote control.

After enter Service Mode by pushing “ADJ” key,
execute “ADC Adjust” by pushing “

G

” key at “ADC

CALIBRATION : COMPONENT”.

Impress Resolution 480i

Impress Resolution 1080i

- Check Input and Signal items. (cf. work instructions) 

1) TV
2) AV (SCART1/SCART2/S-VHS/CVBS)
3) COMPONENT (480i)
4) RGB (PC : 1024 x 768 @ 60hz)
5) HDMI
6) PC Audio In 
* Display and Sound check is executed by Remote

controller.

<Fig. 1> Adjustment pattern(PC)

<Fig. 2> Adjustment pattern(COMPONENT)

(1) W/B Equipment condition

CA210: CH 9, Test signal: Inner pattern (85IRE)

(2) Above 5 minutes H/run in the inner pattern. (“power on”

key of adjust remote control) 

(3) 15  Pin D-Sub Jack is connected to the AUTO W/B

EQUIPMENT.

(4) Adjust Process will start by execute I2C Command (Inner

pattern (0xF3, 0xFF).

(5) Adjust Process will finish by execute I2C Command (Inner
pattern (Inner pattern (0xF3,0x00)).

** 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. 
After enter Service Mode by pushing “ADJ” key,
Enter White Pattern off of service mode, and change off -> on.
Enter “W/B ADJUST” by pushing “

G

” key at “3.W/B ADJUST”. 

* After done 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 “IN STOP KEY” after completing the function

inspection.

(Only Apply for MNT Model)

Check if Power LED Color and Power Consumption operate
as standard. 
- Set Input to RGB and connect D-sub cable to set
- Measurement Condition: (100-240V@ 50/60Hz)
- Confirm DPM operation at the state of screen without Signal.

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

protocol.

- Check whether written EDID data is correct or not.
* For SERVICE main Ass’y, EDID/HDC key have to be

downloaded to Insert Process in advance.

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

protocol.

- Check whether written EDID data is correct or not.
* For SERVICE main Ass’y, EDID/HDC key have to be

downloaded to Insert Process in advance.

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

115200 bps)

- Connect RS232 Signal Cable to RS-232 Jack.
- Write Serial number by use RS-232.
- Must check the serial number at the Diagnostics of SET UP

menu. (Refer to below).

(1) ANALOG DATA 128Byte (2Bi)

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Color

Cool

9,300

ºK X=0.285((±0.002)

<Test Signal>

Temperature

Y=0.293(±0.002)

Inner pattern

Medium 8,000

ºK X=0.295(±0.002)

(216gray,85IRE)

Y=0.305(±0.002)

Warm

6,500

ºK X=0.313(±0.002)

Y=0.329(±0.002)

(2) DIGITAL DATA(HDMI-1) 256Byte

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

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

(High-Bandwidth Digital Contents Protection)

- Connect D-sub Signal Cable to D-Sub Jack
- Input HDCP key with HDCP-key- in-program
- HDCP Key value is stored on EEPROM (AT24C512) which

is 0x80 addresses of 0xA0 page

- AC off/ on and on HDCP button of MSPG925 and confirm

whether picture is displayed or not of using MSPG925

- HDCP Key value is different among the sets.
* For SERVICE main Ass’y, EDID/HDC key have to be

downloaded to Insert Process in advance.

When pressing IN-STOP key by SVC remocon, Red LED are
blinked alternatively. And then Automatically turn off. (Must
not AC power OFF during blinking)

Confirm whether is normal or not when between power
board's ac block and GND is impacted on 1.5kV(dc) or
2.2kV(dc) for one second

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