LG 22LH20R (CHASSIS:LP91A) Service Manual ▷ View online
*Active area
1. Active area of LCD PANEL is in bezel of cabinet
2. Interval between active area and bezel
2. Interval between active area and bezel
|A-B|< 2.0 mm ,|C-D|< 2.0 mm
A:Interval between left of active area and bezel
B:Interval between right of active area and bezel
C:Interval between top of active area and bezel
D:Interval between bottom of active area and beze
A:Interval between left of active area and bezel
B:Interval between right of active area and bezel
C:Interval between top of active area and bezel
D:Interval between bottom of active area and beze
4)Gap between Back Cover and Side AV
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Side View
"h"
Control Braket
Back Cover
Gap h between Back Cover and Control Bracket
-> 0 † h † 0.8
-> 0 † h † 0.8
C
B
D
A
Active Area
Bezel
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ADJUSTMENT INSTRUCTION
1. Application Range
This specification sheet is applied to all of the LCD TV,
LP91A/B/C/D chassis.
LP91A/B/C/D chassis.
2. Specification
1) Because this is not a hot chassis, it is not necessary to use
an isolation transformer. However, the use of isolation
transformer will help protect test instrument.
transformer will help protect test instrument.
2) Adjustment must be done in the correct order.
3) The adjustment must be performed in the circumstance of
3) The adjustment must be performed in the circumstance of
25 ±5 °C of temperature and 65±10% of relative humidity if
there is no specific designation.
there is no specific designation.
4) The input voltage of the receiver must keep 100~220V,
50/60Hz.
5) Before adjustment, execute Heat-Run for 5 minutes at RF
no signal.
3. Adjustment items
3.1. PCB assembly adjustment items
(1) Download the MSTAR main software
(IC800, Mstar ISP Utility)
1) Using D/L Jig
2) Using USB Memory Stick.
1) Using D/L Jig
2) Using USB Memory Stick.
(2) ADC Calibration – RGB / Component
(3) Input Tool-Option/Area option.
(4) Check SW Version.
(3) Input Tool-Option/Area option.
(4) Check SW Version.
4. PCB assembly adjustment method
4.1. Mstar Main S/W program download
4.1.1. Using D/L Jig
(1) Preliminary steps
1) Connect the download jig to D-sub(RGB) jack
(2) Download steps
1) Execute ‘ISP Tool’ program, the main window(Mstar ISP
utility Vx.x.x) will be opened
2) Click the “Connect” button and confirm “Dialog Box”
3) Click the “Config.” button and Change speed I2C Speed
setting : 350Khz~400Khz
4) Read and write bin file.
Click “(1)Read” tab, and then load download
file(XXXX.bin) by clicking “Read”.
file(XXXX.bin) by clicking “Read”.
- LH20/ LH30
1
Filexxx.bin
1
Filexxx.bin
5) Click “(2)Auto” tab and set as below
6) Click “(3)Run”.
7) After downloading, you can see the “(4)Pass” message.
6) Click “(3)Run”.
7) After downloading, you can see the “(4)Pass” message.
4.1.2. Using the Memory Stick
* USB download : Service Mode
1) Insert the USB memory stick to the ISB port.
2) Automatically detect the SW Version.
1) Insert the USB memory stick to the ISB port.
2) Automatically detect the SW Version.
-> S/W download process is executed automatically.
3) Show the message “Copy the file from the Memory”
4) After Finished the Download, Automatically DC Off -> On
5) Check The update SW Version.
4.2. Adjust tool/area option.
Adjust tool/area option refer to the BOM.
4.3. Adjust tool/area option.
Adjust tool/area option refer to the BOM.
4.4. EDID D/L method
Recommend that don’t connect HDMI and RGB(D-SUB) cable
when downloading the EDID.
If not possible, recommend that connect the MSPG equipment.
There are two methods of downloading the edid data
when downloading the EDID.
If not possible, recommend that connect the MSPG equipment.
There are two methods of downloading the edid data
4.4.1. 1st Method
EDID datas are automatically downloaded when adjusting the
Tool Option2.
Automatically downloaded when pushing the enter key after
adjusting the tool option2.
It takes about 2seconds.
Tool Option2.
Automatically downloaded when pushing the enter key after
adjusting the tool option2.
It takes about 2seconds.
4.4.2. 2nd Method
* Caution :
Must be checked that the tool option is right or not.
If tool option is wrong, hdmi edid data could not be
downloaded well.
If tool option is wrong, hdmi edid data could not be
downloaded well.
1) Press the ADJ key
2) Move to the EDID D/L and Press the right direction key(
2) Move to the EDID D/L and Press the right direction key(
G
)
3) Press the right direction key(
G
) at Start.
4) After about a few seconds, appear “OK”, then compele.
4.4.3. RS-232C command Method
(1) Command : AE 00 10
* Caution
Don’t connect HDMI and RGB(D-SUB) cable when
downloading the EDID.
If the cables are connected, Downloading of edid could be
failed.
downloading the EDID.
If the cables are connected, Downloading of edid could be
failed.
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1
Filexxx.bin
4.4.4. EDID data
(1) HD MODEL
<Analog(RGB): 128bytes>
<HDMI 1 : 256Bytes>
<HDMI 2 : 256Bytes>
4.5. ADC Calibration
4.5.1. ADC Calibration - Component (Using External pattern)
(1) Required Equipments
- Remote controller for adjustment
- MSPG-925F/MSPG-1025/MSPG-3233 Pattern Generator
- MSPG-925F/MSPG-1025/MSPG-3233 Pattern Generator
(2) Process
1) Change the Input to Component1 or 2 mode.
2) Input the Component 480i@60Hz 100% Color Bar
2) Input the Component 480i@60Hz 100% Color Bar
YPbPr signal into Component1 or 2.
(MSPG-925F Model: 209 / Pattern: 65 )
3) Press ADJ key on R/C for adjustment.
4) Enter Password number. Password is “0 0 0 0”.
5) Select “0. ADC calibration : Component” by using
4) Enter Password number. Password is “0 0 0 0”.
5) Select “0. ADC calibration : Component” by using
D
/
E
(CH +/-) and press ENTER(
A
).
6) ADC adjustment is executed automatically .
7) When ADC adjustment is finished, this OSD appear
7) When ADC adjustment is finished, this OSD appear
4.5.2. ADC Calibration - RGB (Using External pattern)
(1) Required Equipments
- Remote controller for adjustment
- MSPG-925F/MSPG-1025/MSPG-3233 Pattern Generator
- MSPG-925F/MSPG-1025/MSPG-3233 Pattern Generator
(2) Process
1) Change the Input to RGB mode..
2) Input the PC 1024x768@60Hz Horizontal Color Bar
2) Input the PC 1024x768@60Hz Horizontal Color Bar
signal into RGB.
(MSPG-925F Model: 60 / Pattern: 65 )
3) Press ADJ key on R/C for adjustment.
4) Enter Password number. Password is “0 0 0 0”.
5) Select “0. ADC calibration : RGB” by using
4) Enter Password number. Password is “0 0 0 0”.
5) Select “0. ADC calibration : RGB” by using
D
/
E
(CH +/-)
and press ENTER(
A
).
6) ADC adjustment is executed automatically .
7) When ADC adjustment is finished, this OSD appear
7) When ADC adjustment is finished, this OSD appear
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OK
OK
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