LG 42LH40ED / 42LH45ED (CHASSIS:LJ92J) Service Manual ▷ View online
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ADJUSTMENT INSTRUCTION
1. Application Range
This specification sheet is applied all of the LJ91D, LJ92J
LCD TV models, which produced in manufacture department
or similar LG TV factory.
LCD TV models, which produced in manufacture department
or similar LG TV factory.
2. Notice
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. But it is
flexible when its factory local problem occurs. .
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.
• After Receive 100% Full white pattern (06CH) then process
Heat-run
(or “8. Test pattern” condition of Ez-Adjust status)
• How to make set white pattern
1) Press Power ON button of Service Remocon
2) Press ADJ button of Service remocon. Select “8. Test
2) Press ADJ button of Service remocon. Select “8. Test
pattern” and, after select “White” using navigation button,
and then you can see 100% Full White pattern.
and then you can see 100% Full White pattern.
* In this status you can maintain Heat-Run useless any
pattern generator
* Notice: if you maintain one picture over 20 minutes
(Especially sharp distinction black with white pattern –
13Ch, or Cross hatch pattern – 09Ch) then it can appear
image stick near black level.
13Ch, or Cross hatch pattern – 09Ch) then it can appear
image stick near black level.
3. Adjustment Items
3.1 PCB Assembly adjustment
• CPLD DOWNLOAD
• Adjust 480i Comp1
• Adjust 1080p Comp1/RGB
• Adjust 480i Comp1
• Adjust 1080p Comp1/RGB
- If it is necessary, it can adjustment at Manufacture Line
- You can see set adjustment status at “1. ADJUST
- You can see set adjustment status at “1. ADJUST
CHECK” of the “In-start menu”
3.2 Set Assembly Adjustment
• EDID (The Extended Display Identification Data ) / DDC
(Display Data Channel) download
• Color Temperature (White Balance) Adjustment
• Make sure RS-232C control
• Selection Factory output option
• Make sure RS-232C control
• Selection Factory output option
4. PCB Assembly Adjustment
4.1. CPLD DOWNLOAD : JTAG MODE
4.2. << PRINT PORT >> PIN MAP
Pin
JTAG Mode Signal Name
2
TCK
3
TMS
8
TDI
11
TDO
13
-
15
VCC
18 TO 25
GND
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4.3. << 10P WAFER >> PIN MAP
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4.4. Using RS-232C
Adjust 3 items at 3.1 PCB assembly adjustments “4.1.3
sequence” one after the order.
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Adjustment protocol
See ADC Adjustment RS232C Protocol_Ver1.0
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Adjustment protocol
- Pattern Generator : (MSPG-925FA)
- Adjust 480i Comp1 (MSPG-925FA : model :209 , pattern
- Adjust 480i Comp1 (MSPG-925FA : model :209 , pattern
: 65)
- Adjust 1080p Comp1/RGB(MSPG-925FA:model : 225 ,
pattern : 65)
- Adjust RGB (MSPG-925FA:model :225 , Pattern :65) –
RGB-PC Mode
* If you want more information then see the below Adjustment
method (Factory Adjustment)
method (Factory Adjustment)
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Adjustment sequence
- ad 00 00 : Enter the ADC Adjustment mode.
- xb 00 40: Change the mode to Component1 (No actions)
- ad 00 10: Adjust 480i Comp
- ad 00 10: Adjust 1080p Comp
- xb 00 60: Change to RGB-PC mode(No action)
- ad 00 10: Adjust 1080p RGB
- ad 00 90: End of the adjustment
- xb 00 40: Change the mode to Component1 (No actions)
- ad 00 10: Adjust 480i Comp
- ad 00 10: Adjust 1080p Comp
- xb 00 60: Change to RGB-PC mode(No action)
- ad 00 10: Adjust 1080p RGB
- ad 00 90: End of the adjustment
Order
Command
Set response
1. Inter the
ad 00 00
d 00 OK00x
Adjustment mode
2. Change the
kb 00 40
b 00 OK40x (Adjust 480i Comp1/1080p Comp1)
Source
kb 00 60 b 00 OK60x (Adjust 1080p RGB)
3.Start Adjustment ad 00 10
4.Return the
OKx ( Success condition )
Response
NGx ( Failed condition )
5.Read (main)
(main : component1 480i, RGB 1080p)
Adjustment data
ad 00 20
000000000000000000000000007c007b006dx
(main)
(main : component1 1080p)
ad 00 30
000000070000000000000000007c00830077x
6.Confirm
ad 00 99
NG 03 00x (Failed condition)
Adjustment
NG 03 01x (Failed condition)
NG 03 02x (Failed condition)
OK 03 03x (Success condition)
7. End of Adjustment ad 00 90
d 00 OK90x
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5. Factory Adjustment
5.1 Manual Adjust Component 480i/1080p
RGB 1080p
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Summary : Adjustment component 480i/1080i and RGB
1080p is Gain and Black levelsetting at Analog
to Digital converter, and compensate the RGB
deviation
to Digital converter, and compensate the RGB
deviation
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Using instrument
- Adjustment remocon, 801GF(802B, 802F, 802R) or
MSPG925FA pattern generator (It can output 480i/1080i
horizontal 100% color bar pattern signal, and its output
level must setting 0.7V±0.1V p-p correctly)
horizontal 100% color bar pattern signal, and its output
level must setting 0.7V±0.1V p-p correctly)
<Pic.4 Adjustment pattern : 480i / 1080p 60Hz Pattern >
* You must make it sure its resolution and pattern cause every
instrument can have different setting
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Adjustment method 480i Comp1, Adjust 1080p
Comp1/RGB (Factory adjustment)
Comp1/RGB (Factory adjustment)
• ADC 480i Component1 adjustment
- Check connection of Component1
- MSPG-925FA Ë Model: 209, Pattern 65
• Set Component 480i mode and 100% Horizontal Color
- Check connection of Component1
- MSPG-925FA Ë Model: 209, Pattern 65
• Set Component 480i mode and 100% Horizontal Color
Bar Pattern(HozTV31Bar), then set TV set to
Component1 mode and its screen to “NORMAL”
Component1 mode and its screen to “NORMAL”
• ADC 1080p Component1 / RGB adjustment
- Check connection both of Component1 and RGB
- MSPG-925FA Model: 225, Pattern 65
- MSPG-925FA Model: 225, Pattern 65
• Set Component 1080p mode and 100% Horizontal Color
Bar Pattern(HozTV31Bar), then set TV set to
Component1 mode and its screen to “NORMAL”
Component1 mode and its screen to “NORMAL”
• After get each the signal, wait more a second and enter
the “IN-START” with press IN-START key of Service
remocon. After then select “7. External ADC” with
navigator button and press “Enter”.
remocon. After then select “7. External ADC” with
navigator button and press “Enter”.
• After Then Press key of Service remocon “Right
Arrow(VOL+)”
• You can see “ADC Component1 Success”
• Component1 1080p, RGB 1080p Adjust is same
• Component1 1080p, RGB 1080p Adjust is same
method.
• Component 1080p Adjustment in Component1 input
mode
• RGB 1080p adjustment in RGB input mode
• If you success RGB 1080p Adjust. You can see “ADC
• If you success RGB 1080p Adjust. You can see “ADC
RGB-DTV Success”
5.2 EDID (The Extended Display
Identification Data) / DDC (Display Data
Channel) Download.
Channel) Download.
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Summary
• It is established in VESA, for communication between
PC and Monitor without order from user for building user
condition. It helps to make easily use realize “Plug and
Play” function.
condition. It helps to make easily use realize “Plug and
Play” function.
• For EDID data write, we use DDC2B protocol.
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Auto Download
• After enter Service Mode by pushing “ADJ” key,
• Enter EDID D/L mode.
• Enter “START” by pushing “OK” key.
• Enter EDID D/L mode.
• Enter “START” by pushing “OK” key.
Caution: - Never connect HDMI & D-sub Cable when the user
downloading .
- Use the proper cables below for EDID Writing.
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