DOWNLOAD LG 15LS1RA (CHASSIS:LN71A) Service Manual ↓ Size: 2.18 MB | Pages: 24 in PDF or view online for FREE

- 9 -

This document is applied to 15", 20” LCD TV.(chassis : LN71A)

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 controller

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

“Config” tab.

2) Set as below, and check the following tabs.

* Port type - Choose the your port type, Normally “LPT1”,

or “LPT2”

* Speed - Choose the speed from 70 to 99
* JIG - Choose the your JIG type, Normally “Mstar” or

“LGE”, and then click the Apply.

3) Click “Connect” tab. If flash memory is detected normally,

Flash memory type will be displayed.
Example:‘MX25L4005’(MX) or ‘Winb25X40’(Winbond),,,etc

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

clicking “Read”.

5) Click “Auto” tab and set as below, and then click “Run”.

6) After downloading, check “OK” message.

* APC - After Manual - Insert, executing APC

(15inch only)

1) Auto RG Gain/ Offset Adjustment

(a) Convert to PC in Input-source.
(b) Signal equipment displays.

- Output Voltage : 730 mVp-p
- Impress Resolution XGA (1024 x 768 @ 60Hz)
- Pattern : gray pattern that left & right is black and

center is white signal.(Refer below picture)
(Model : 60, Pattern : 28 at MSPG925L)

(c) Adjust by commanding AUTO_COLOR_ADJUST

(0xF1) 0x00 0x02 instruction.

(4)

filexxx.bin

(6) ........OK

(5)

- 10 -

2) Confirmation

(a) We confirm whether “0x8C” address of EEPROM

“0xB4” is “0xAA” or not.

(b) If “0x8C” address of EEPROM “0xB4” isn’t “0xAA”,

we adjust once more.

(c) ADC result is displayed to “OK” or “NG” on left and

lower of the screen.

(d) We can confirm the ADC values from “0x00~0x05”

addresses in a page “0xB4”.

1) Auto Component Gain/Offset adjustment

a) Convert to Component in Input-source 
b) Signal equipment displays

Output Voltage  :  700  mVp-p
Impress Resolution : Component  480p.
Pattern: 8color & 16gray pattern(Refer below picture).
(Model:212, Pattern: 8 at MSPG925L)

c) Adjust by commanding AUTO_COLOR_ADJUST

(0xF1) 0x00 0x02 instruction.

2) Confirmation

a) We confirm whether “0x8E” address of EEPROM

“0xB4” is “0xAA” or not. 

b) If “0x8C” address of EEPROM “0xB4” isn’t “0xAA”, we

adjust once more

c) ADC result is displayed to “OK” or “NG” on left and

lower of the screen.

d) We can confirm the ADC values from “0x00~0x05”

addresses in a page “0xB4”.

* Manual ADC process(using Service Remocon)

- RGB & Component Mode

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

Before : “ADC RGB-NA” “ADC CPNT-NA”
After : “ADC RGB-OK” “ADC CPNT-OK”

- Check Input and Signal items
1) TV
2) Video (CVBS/ S-Video)
3) Component (YPbPr)
4) RGB (PC : 1024 x 768@60Hz) - 15” only

* Display and Sound check is executed by Remote control.

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

Generator.

-15” only

(1) Set Input to RGB
(2) Input signal : XGA(1024 x768 @ 60Hz), Full white 216/255

gray level (85 IRE, Model : 60, Pattern : 78 at MSPG925L)

(3) Set CSM : Cool
(4) Confirm whether x=0.276±0.03, y=0.283±0.03, y

≥180

or not.

(1) Set Input to Video.
(2) Input signal : CVBS, NTSC @ 60Hz

Full White 216/255 gray level (85 IRE, Model : 201 
Patter : 78 at MSPG925L)

(3) Set APC : Clear / ACC : Cool
(4) Confirm whether x = 0.276±0.03, y = 0.283±0.03, y ≥ 180

(15”)/ Y ≥ 250(20”) or not.

(1) Set Input to Component.
(2) Input signal : Component(YPbPr), 480P

Full White 216/255 gray level and 480P
(Model : 212  Patter : 78 at MSPG925L)

(3) Set APC : Clear / ACC : Cool
(4) Confirm whether x = 0.276±0.03, y = 0.283±0.03, y ≥ 180

(15”)/ Y ≥ 250(20”) or not.

(1) Confirm that each items satisfy under standard condition

that was written product spec.

(2) Confirm Video and Sound at each source.

1) Video

(a) Select input Video(S-video) and check whether

picture is displayed or not.

(b) Select input Video(CVBS) and check whether picture

is displayed or not.

(c) Select input Component 480P and check whether

picture is displayed or not.

2) TV : Select input TV and check below item.(In Gumi factory)

CH04 (US-04) - Stereo Sound Check
CH30 (US-30) - Dual Sound Check
CH02 (US-02) - Stereo, SAP Sound Check

- Caption Check

3) RGB(PC/DTV) - 15” only

Select input RGB and check whether picture is
displayed or not.

4) Component

Select input component and check whether picture is
displayed or not.

Auto

Color Balance

ADC

RGB0OK CPNT-OK

Auto-RGB

To set

Red Offset

xxx

Green Offset

xxx

Blue Offset

xxx

Red Gain

xx

Green Gain

xx

Blue Gain

xx

Reset

To set

- 11 -

(1) Check if Power LED Color and Power Consumption

operate as standard.

(2) Measurement Condition : 230V@ 60Hz (Analog)
(3) Confirm Stand-by operation.

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

protocol.

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

Product spec).

(1) After all function test, press IN-STOP Key by Service

Remote control. And make ship condition.

(2) When pressing IN-STOP key by service remote control,

green and red LED are blinked alternatively. And then
Automatically turn off.(Must not AC power off during
blinking)

- NTSC Service Mode OPTION DATA(According to Suffix)

15LS1RA-MK

20LS1RA-MK

3970

1920

Resolution

2

0

Module

0

0

TV

1

1

Video

1

1

COMPONENT

1

1

PC-RGB

1

0

DVI

0

0

HDMI

0

0

Area Option[A B]

PAL

(A)

0 : FACTORY MODE OFF 

1 : FACTORY MODE ON

[Caution] FACTORY MODE ON only used in factory.

(B)  0: default Option setting.

1~4: The other Area Option setting.(Reserved)

[Caution] Initial Setting of Area Option is [1 0] in production line. 

After IN-STOP, Area Option will change [0 0].

If Area Option isn’t 00 after IN-STOP, must change to 00. (Using 

G

key on R/C) 

NTSC

S. Am : For South America

Korea : For Korea 

Item

Condition

Remark

2HR-OFF

1

0 : 2 Hour off option-OFF

1 : 2 Hour off option-ON

FACTORY-MODE

0

0 : EEPROM Write Protection On

1 : EEPROM Write Protection Off

CHANNEL-MUTE

1

0 : Channel Mute Off

1 : Channel Mute On

VAL

00

00

data

00

00 – 100

00 – 100

00 – 100

00 – 100

00 – FF

00 – FF

00 – FF

00 – 7F

00 – 7F

00 – 7F

00 – 3F

00 - 64

02

0, 1, 2, 3

00, FF

0, 1, 2, 3

Description

EEPROM all clear

EEPROM Read

EEPROM Write by

some values

Color Save

They have different

range each mode,

FOS Adjustment

Drive adjustment

Offset adjustment

Bright adjustment

Luminance adjustment

Auto COLOR

Adjustment

0: COOL

1: NORMAL

2: WARM

3: USER

00: Factory mode off 

FF: Factory mode On

0 : TV

1 : AV1

2 : AV2

3 : Component

4 : RGB

5 : DVI

No.

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

Adjustment Contents

EEPROM ALL INIT.

EEPROM Read

EEPROM Write

COLOR SAVE

(R/G/B cutoff, Drive,

Contrast, Bright)

H POSITION

V POSITION

CLOCK

PHASE

R DRIVE

G DRIVE

B DRIVE

R CUTOFF

G CUTOFF

B CUTOFF

BRIGHT

CONTRAST

AUTO_COLOR_

ADJUST

CHANGE_COLOR_

TEMP

FACTORY_

DEFAULT

AUTO_

INPUTCHANGE

CMD(hex)

E4

E7

E8

EB

20

30

90

92

16

18

1A

80

82

84

10

12

F1

F2

F3

F4

ADR

00

00

00

00

00

00

00

00

00

00

00

00

00

00

00

00

00

00

00

00

Purpose : To read the appointment Address of E2PROM 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

: E2PROM 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

E2PROM

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 vZideo 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)

ADL(hex)

0

80

0

80

0

80

0

80

Details

0-Page   0~7F  Read

0-Page  80~FF  Read

1-Page   0~7F  Read

1-Page  80~FF  Read

2-Page   0~7F  Read

2-Page  80~FF  Read

3-Page   0~7F  Read

3-Page  80~FF  Read

Adjustment Contents

EEPROM READ

CMD(hex)

E7

ADR(hex)

A0

A2

A4

A6

ST OP

A 

A  D1 

6F 

ST OP 

ST ART 

A 

A

A 

Dn

A 

A 

A  50 

6E 

03 

CMD 

A DH 

84

ST ART 

A 

A 

A DL 

A 

CS 

128 Bytes

Delay 100ms

ST OP

A

A

A

A

A

50

6E

03

CMD

A DH

84+ n

ST ART

A DL

A

CS

A

A

Data_1

A

. . .

Data_n

A

- 12 -

No.

1

2

Adjustment contents

EEPROM WRITE

CMD(hex)

E8

LEN

94

84+n

Details

16-Byte Write

n-byte Write

A

CS 

A  Data1 

6F

ST ART

. . .  

Data12

ST OP

NA

 

ST OP

A 

A 

A 

A 

A  50 

6E 

03 

70 

00 

84 

ST ART 

A 

A 

00 

A 

CS