DOWNLOAD LG 42SL90QD-DA (CHASSIS:LT91L) Service Manual ↓ Size: 4.5 MB | Pages: 69 in PDF or view online for FREE

- 10 -

No

Resolution

H-freq(kHz)

V-freq.(Hz)

Pixel clock(MHz)

Proposed

Remark

1.

720*400 31.468 

70.08 

28.321 

HDCP

2.

640*480 31.469 

59.94 

25.17

VESA  HDCP

3. 800*600

37.879

60.31 

40.00 

VESA 

HDCP

4.

1024*768

48.363

60.00 65.00 

VESA(XGA)

HDCP

5.

1280*768 47.78

59.87

79.5

WXGA  HDCP

6.

1360*768 47.72 59.8 84.75

WXGA  HDCP

7.

1280*1024 63.595

60.0  108.875  SXGA

HDCP

8.

1920*1080

67.5

60

148.5

WUXGA

HDCP

No

Resolution

H-freq(kHz)

V-freq.(Hz)

Pixel clock(MHz)

Proposed

Remark

1.

720*480 

31.469 /31.5 

59.94 / 60

27.00/27.03

SDTV 480P

2.

720*576 31.25 

50

54 

SDTV 

576P

3.

1280*720 37.500 

50

74.25 

HDTV 

720P

4.

1280*720 

44.96 / 45 

59.94 / 60

74.17/ 74.25 

HDTV 720P

5.

1920*1080 

33.72 / 33.75 

59.94 / 60

74.17/ 74.25 

HDTV 1080I 

6.

1920*1080 28.125 50.00

74.25 

HDTV 

1080I

7.

1920*1080 

26.97 / 27 

23.97 / 24

74.17/ 74.25 

HDTV 1080P

8.

1920*1080

33.716 / 33.75

29.976 / 30.00

74.25

HDTV 1080P

9.

1920*1080 56.250 50

148.5

HDTV 

1080P

10.

1920*1080 

67.43 / 67.5 

59.94 / 60

148.35/148.50 

HDTV 1080P

- 11 -

This specification sheet is applied to all of the LCD TV with
LT91T 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.

* APC - After Manual-Insert, 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  “Error” is displayed, Check connection between
computer, jig, and set..

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

by clicking “Read”.

(4) Click  “Connect” tab. If “Can’t” is displayed, check

connection between computer, jig, and set.

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

Case1 : 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 “I n-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.

(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) After updating is complete, The TV will restart automatically.
(6) If  TV  turns on, check your updated version and Tool

option. (refer to the next page about tool option)

* If downloading version is higher 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. 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.)

4. Completed selecting Tool option.

• Input signal : Component 
• Signal equipment displays

Adjustment pattern

- Component 480I

MODEL: 209 in Pattern Generator(480i Mode)
PATTERN : 65 in Pattern Generator(MSPG-925 SERIES)

• Input Signal : RGB  (You  don’t need to connect RGB Cable).

Because We use TV internal pattern.

G

” key at “5. ADC

Calibration”

* Caution: Using ‘power on’ button of the Adj. R/C, power on TV.

* ADC Calibration Protocol (RS232)

* Adjustment can be done using only external ADC
* Required equipment : Adjustment R/C.
* Down Load data of picture

This process must do in using the LED model

- Push the button “Power Only “ key in Adjust remote control
- Push the button “ Exit” key in Adjust remote control

(1) Check display and sound

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

1) TV
2) AV (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 control.

- 12 -

Model 

Tool option1  Tool option2 Tool option3  Tool option4

47SL80YD

34305

3144

55974

4368

 

TV Software Upgrade

Upgrading...

Do not plug off!

63%

 

 

 

TV Software Upgrade

Upgrading COMPLETED

The TV will restart after    seconds.

100%

ADC Comp 480i

ADC Comp 1080p

ADC RGB

 

TV Software Upgrade

Copying files from memory

Do not remove the memory card from the pc

Do not plug off!

No.

Item

CMD1

CMD2

Data0

Data1

1 

Main total mode 

A 

A 

0

0

0

0

2 

Change to Component 

X 

B 

0

0

4

0

3 Adjust 

Component 

A 

D 

0

0

1

0

4 

Change to RGB 

X 

B 

0

0

6

0

5 Adjust 

RGB 

A 

D 

0

0

1

0

· W/B Equipment condition

CA210 : CH 14(LED), Test signal : Inner pattern (85IRE)

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

of adjust remote control)

4.1.1. Connecting picture of the measuring instrument

(On Automatic control)
Inside PATTERN is used when W/B is controlled. Connect to
auto controller or push Adjustment R/C POWER ON -> Enter
the mode of White-Balance, the pattern will come out

4.1.2. Auto-control interface and directions

1) Adjust in the place where the influx of light like floodlight

around is blocked. (illumination is less than 10ux).

2) Adhere closely the Color Analyzer (CA210) to the module

less than 10cm distance, keep it with the surface of the
Module and Color Analyzer’s Prove vertically.(80~100°).

3) Aging time

- After aging start, keep the power on (no suspension of

power supply) and heat-run over 15minutes.

- Using ‘no signal’ or ‘full white pattern’ or the others, check

the back light on.

4.1.3. Auto adjustment Map (RS-232C)

**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)

• After enter Service Mode by pushing “ADJ” key,
• Enter White Balance by pushing “

G

”

* 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.

- 13 -

Cool 13,000k

ºK

X=0.269(±0.002)

Y=0.273(±0.002)

<Test Signal>

Medium 9,300k

ºK

X=0.285(±0.002)

Inner pattern

Y=0.293(±0.002)

(216gray,85IRE)

Warm

6,500k

ºK

X=0.313(±0.002)

Y=0.329(±0.002)

 

Full White Pattern

COLOR
ANALYZER
TYPE: CA-210

RS-232C Communication

CA-210

RS-232C COMMAND MIN

CENTER

MAX

[CMD ID DATA]

(DEFAULT)

Cool

Mid

Warm

Cool

Mid

Warm

R Gain

jg 

Ja 

jd 

00

172 

192 

192

255

G Gain 

jh 

Jb

je 

00

172 

192 

192

255

B Gain 

ji 

Jc 

jf

00

192 

192 

172 

255

R Cut 

64 

64 

64 

128

G Cut 

64 

64 

64 

128

B Cut 

64 

64 

64 

128

White Balance

Color Temp.

R-Gain

G-Gain

B-Gain

R-Cut

G-Cut

B-Cut

Test-Pattern.

Reset

Cool

172

172

192

64

64

64

ON

To set