DOWNLOAD LG 22LC2D (CHASSIS:LA75E) Service Manual ↓ Size: 5.69 MB | Pages: 23 in PDF or view online for FREE

- 9 -

This specification sheet is applied to 19”/ 22” LCD TV which is
manufactured in TV (or Monitor) Factory or is produced on the
basis of this data.  

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

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

* 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) Auto RGB Gain/Offset Adjustment

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

Output Voltage : 700 mVp-p
Impress Resolution XGA (1024x 768 @ 60Hz)
Model : 60   in Pattern Generator
Pattern : 29 in Pattern Generator (MSPG-925 Series)
[gray pattern that left & right is black and center is
white signal (Refer below picture)].

- Adjust by commanding AUTO_COLOR _ADJUST

(0xF1) 0x00 0x02 instruction.

2) Confirmation

- We confirm whether “0xB6(RGB)” address of

EEPROM “0xA2” is “0xAA” or not.

- If “0xB6(RGB)” address of EEPROM “0xB4” isn’t

“0xAA”, we adjust once more.

- We can confirm the ADC values from “0xB0 ~

0xB5(RGB)” addresses in a page “0xA2”

* Manual ADC process using Service Remote control.

After enter Service Mode by pushing “INSTART” key,
execute “Auto-RGB” by pushing “

G

” key at “Auto-

RGB”.

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 : 08 in Pattern Generator(MSPG-925 Series)

Impress Resolution  1080i
MODEL : 223   in Pattern Generator (1080i Mode)
PATTERN : 08 in Pattern Generator(MSPG-925 Series)

(1)

(3)

(2)

OK

Please check the speed : 
To use speed between
from 200KHz to 400KHz

filexxx.bin

(5)

(7)  .......OK

(6)

<Adjustment pattern (PC)>

- 10 -

- Adjust by commanding AUTO_COLOR_ADJUST

(0xF1) 0x00 0x02 instruction.

2) Confirmation

- We confirm whether “0xBF(480i)/ 0xC8(1080i)”

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

- If “0xBF(480i)/0xC8(1080i)” address of EEPROM

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

- We can confirm the ADC values from “0xB9~0xBE

(480i)/ 0XC2~(1080i)” addresses in a page “0xA2”.

A

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

1) TV
2) AV (CVBS/ S-Video)
4) COMPONENT (480i)
5) RGB (PC : 1024 x 768 @ 60hz)
6) HDMI
7) PC Audio In and H/P Out

* Display and Sound check is executed by Remote control.

(1) Above 30 minutes H/run in RF no signal
(2) 15 Pin D-Sub Jack is connected to the signal of Pattern

Generator.

(1) Set Input to RGB.
(2) Input signal : (1680 x 1050 @ 60Hz) Full white 216/255

gray level (85 IRE, Model : 122, Pattern : 78 at MSPG925L)

(3) Set CSM : Cool
(4) Confirm whether x = 0.283±0.015, y = 0.297±0.015(9300°K

± 1000°K) or not. 

(1) Set Input to AV
(2) Input signal : CVBS - Full white 216/255 gray level (85 IRE,

Model : 202, Pattern : 78 at MSPG925L)

(3) Set PSM : Standard / CSM : Cool
(4) Confirm whether x = 0.283±0.015, y = 0.297±0.015(9300°K

± 1000°K) or not. 

(1) Set Input to COMPONENT.
(2) Input signal : 480P - Full white 216/255 gray level (85 IRE

Model : 212, Pattern : 78 at MSPG925L)

(3) Set PSM : Standard / CSM : Cool
(4) Confirm whether x = 0.283±0.015, y = 0.297±0.015(9300°K

± 1000°K) or not. 

(MNT Model)

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

protocol.

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

to Product spec).

1) ANALOG DATA 128Byte

2) DIGITAL DATA 256Byte

a. All Data : HEXA Value
b. Changeable Data

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

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 EEPROM(AT24C512) which

is 80~A1 addresses of 0xA0~0xA2 page.

4) AC off/ on and on HDCP button of MSPG925 and confirm

whether picture is displayed or not of using MSPG925.

5) HDCP Key value is different among the sets.

<Adjustment pattern (COMPONENT)>

FACTORY ON

E0

00

00

Factory mode on

FACTORY OFF

E2

00

00

Factory mode off

EEPROM ALL INIT.

E4

00

00

EEPROM All clear

EEPROM Read

E7

00

00

EEPROM Read

EEPROM Write

E8

00

data

EEPROM Write by some values

COLOR SAVE (R/G/B cutoff, Drive, Contrast, Bright)

EB

00

00

Color Save

H POSITION

20

00

00 – 100

They have different range each mode, FOS Adjustment.

V POSITION

30

00

00 – 100

CLOCK

90

00

00 – 100

PHASE

92

00

00 – 100

R DRIVE

16

00

00 – FF

Drive adjustment

G DRIVE

18

00

00 – FF

B DRIVE

1A

00

00 – FF

R CUTOFF

80

00

00 – 7F

Offset adjustment

G CUTOFF

82

00

00 – 7F

B CUTOFF

84

00

00 – 7F

BRIGHT

10

00

00 – 3F

Bright adjustment

CONTRAST

12

00

00 - 64

Luminance adjustment

AUTO_COLOR_ADJUST

F1

00

02

Auto COLOR Adjustment

CHANGE_COLOR_TEMP

F2

00

0,1,2,3

0 : COOL, 1 : NORMAL, 2 : WARM, 3 : USER

FACTORY_DEFAULT

F3

00

00

Factory mode off  & II_SW is “1” & Input change to “ TV”

AUTO_INPUT CHANGE

F4

00

0,1,2,4

0 :  TV, 1 :  AV1, 2 :  AV2, 3 :  Component, 4 :  RGB, 5 :  DVI

1) After all function test., press IN-STOP Key by SVC Remote

control. And Make Ship Condition. 

2) When pressing IN-STOP key by SVC remote control, 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.

- 11 -

INSTART MENU

ADJ MENU

VAL

Description

ADR

CMD(hex)

Adjustment Contents

* Purpose : To read the appointment Address of E

2

PROM by

128(80h)-byte

LEN : 84h+Bytes
CMD : 8Eh
ADH : E

2

PROM  Slave Address(A0,A2,A4,A6,A8),  Not

00h(Reserved by BufferToEEPROM)

ADL : E

2

PROM  Sub Address(00~FF)

Data : Write data

* Purpose

1) EDID write : 16-byte by 16-byte, 8 order (128-byte)

write(TO “00 – 7F” of “EEPROM Page A4”).

2) FOS Default write : 16-mode data (HFh, HFl, VF, STD,

HP, VP, Clk, ClkPh, PhFine) write.

3) Random Data write : write the appointment Address of

E

2

PROM.

1) Send CMD(70h) to read Video RAM value from MICOM

And save its value to 128-Bytes Buffer.(Common Buffer for
the use of EDID)

2) Delay 500ms. (Time to Wait and Read Video RAM from

MICOM)

3) Be transmitted the contents of MICOM’s 128-bytes Buffer to

PC. (128th Data is the CheckSum of 127-bytes data :
That’s OK if the value of adding 128-bytes Data is Zero)

- 12 -

128 Bytes

Delay 100ms

Data 128

EEPROM READ

E7

A0

0

0-Page   0~7F  Read

80

0-Page  80~FF  Read

A2

0

1-Page   0~7F  Read

80

1-Page  80~FF  Read

A4

0

2-Page   0~7F  Read

80

2-Page  80~FF  Read

A6

0

3-Page   0~7F  Read

80

3-Page  80~FF  Read

Adjustment contents CMD(hex) ADH(hex) ADL(hex)

Details

EEPROM WRITE

E8

94

16-Byte Write

84+n

n-byte Write

Adjustment contents

CMD(hex)

ADH(hex)

Details