LG 42LH40 (CHASSIS:LA92G) Service Manual ▷ View online
- 9 -
6. Component Video Input (Y, C
B
/P
B
, C
R
/P
R
)
No
Specification
Remark
Resolution
H-freq(kHz)
V-freq(Hz)
Pixel Clock(MHz)
1.
720*480
15.73
60
13.5135
SDTV ,DVD 480I
2.
720*480
15.73
59.94
13.5
SDTV ,DVD 480I
3.
720*480 31.47
60
27.027
SDTV
480P
4.
720*480 31.47
59.94
27.0
DTV
480P
5.
1280*720 45.00
60.00
74.25
HDTV
720P
6.
1280*720
44.96
59.94
74.176
HDTV 720P
7.
1920*1080 33.75
60.00
74.25
HDTV
1080I
8.
1920*1080
33.72
59.94
74.176
HDTV 1080I
9.
1920*1080
67.500
60
148.50
HDTV 1080P
10.
1920*1080
67.432 59.939 148.352
HDTV
1080P
11.
1920*1080 27.000
24.000
74.25
HDTV
1080P
12.
1920*1080
26.97
23.94
74.176 HDTV
1080P
13.
1920*1080
33.75 30.000
74.25
HDTV
1080P
14.
1920*1080 33.71
29.97
74.176
HDTV
1080P
No
Specification
Remark
Resolution
H-freq(kHz)
V-freq(Hz)
Pixel Clock(MHz)
1.
640*350 31.468 70.09
25.17
EGA
2.
720*400 31.469 70.08
28.32
DOS
3.
640*480 31.469 59.94
25.17
VESA(VGA)
4.
640*480 37.861
72.80
31.50
VESA(VGA)
5.
640*480 37.500
75.00
31.50
VESA(VGA)
6.
800*600
35.156
56.25 36.00
VESA(SVGA)
7.
800*600 37.879 60.31
40.00
VESA(SVGA)
8.
800*600 48.077 72.18
50.00
VESA(SVGA)
9.
800*600 46.875 75.00
49.50
VESA(SVGA)
10.
1024*768 48.363
60.00
65.00
VESA(XGA)
11.
1024*768
56.476
70.06 75.00
VESA(XGA)
12.
1024*768
60.023
75.02 78.75
VESA(XGA)
13.
1280*768
47.776
59.870 79.5
CVT(WXGA)
14.
1280*768
60.289 74.893 102.25
CVT(WXGA)
15.
1360*768 47.712
60.015
85.50
VESA
(WXGA)
16.
1280*1024
63.981
60.020
108.00 VESA
(SXGA)
17.
1280*1024
79.976 75.025
135
VESA
(SXGA)
18.
1600*1200
75.00
60.00 162
VESA
(UXGA)
19.
1920*1080
66.587 59.934 148.5
HDTV
1080P
7. RGB input(PC)
- 10 -
8. HDMI Input (PC/DTV)
8.1 PC Mode
No
Resolution
H-freq(kHz)
V-freq.(Hz)
Pixel clock(MHz)
Proposed
Remark
1 640*350
31.468
70.09
25.17
EGA
2 720*400
31.469
70.08
28.32
DOS
3 640*480
31.469
59.94
25.17
VESA(VGA)
4 640*480
37.861
72.80
31.50
VESA(VGA)
5 640*480
37.500
75.00
31.50
VESA(VGA)
6 800*600
35.156
56.25
36.00
VESA(SVGA)
7 800*600
37.879
60.31
40.00
VESA(SVGA)
8
800*600 48.077
72.18
50.00
VESA(SVGA)
9
800*600 46.875
75.00
49.50 VESA(SVGA)
10
1024*768
48.363 60.00
65.00
VESA(XGA)
11
1024*768
56.476 70.06
75.00
VESA(XGA)
12
1024*768 60.023
75.02
78.75
VESA(XGA)
13 1280*768
47.776
59.870
79.5
CVT(WXGA)
14 1360*768
47.712
60.015
85.50
VESA
(WXGA)
15 1280*1024
63.981
60.020
108.00
VESA
(SXGA)
16
1280*1024 79.976 75.025
135
VESA
(SXGA)
17 1600*1200
75.00
60.00
162
VESA
(UXGA)
18
1920*1080 7.5
60
148.5
HDTV
1080P
8.2 DTV Mode
No
Resolution
H-freq(kHz)
V-freq.(Hz)
Pixel clock(MHz)
Proposed
Remark
1 720*480
31.47
60
27.027
SDTV
480P
2 720*480
31.47
59.94
27.00
SDTV
480P
3 1280*720
45.00
60.00
74.25
HDTV
720P
4 1280*720
44.96
59.94
74.176
HDTV
720P
5
1920*1080 33.75 60.00 74.25
HDTV
1080I
6
1920*1080 33.72 59.94 74.176
HDTV
1080I
7
1920*1080 67.500
60
148.50
HDTV
1080P
8 1920*1080
67.432
59.939
148.352
HDTV
1080P
9 1920*1080
27.000
24.000
74.25
HDTV
1080P
10
1920*1080 26.97 23.94
74.176
HDTV
1080P
11
1920*1080 33.75
30.000
74.25
HDTV
1080P
12 1920*1080
33.71
29.97
74.176
HDTV
1080P
- 11 -
ADJUSTMENT INSTRUCTION
1. Application Range
This specification sheet is applied to all of the LCD TV with
LA92G chassis.
LA92G 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 ±5ºC 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 100~240V,
50/60Hz.
5) The receiver must be operated for about 5 minutes prior to
the adjustment when module is in the circumstance of over
15.
15.
In case of keeping module is in the circumstance of 0°C, it
should be placed in the circumstance of above 15°C for 2
hours.
In case of keeping module is in the circumstance of below
-20°C, it should be placed in the circumstance of above
15°C for 3 hours,.
should be placed in the circumstance of above 15°C for 2
hours.
In case of keeping module is in the circumstance of below
-20°C, it should be placed in the circumstance of above
15°C for 3 hours,.
* Caution
When still image is displayed for a period of 20 minutes or
longer (especially where W/B scale is strong. Digital pattern
13ch and/or Cross hatch pattern 09ch), there can some
afterimage in the black level area.
longer (especially where W/B scale is strong. Digital pattern
13ch and/or Cross hatch pattern 09ch), there can some
afterimage in the black level area.
3. Adjustment items
3.1. Board-level adjustment
• Adjust 480i Component1 adjustment
• Adjust 1080p Component1 adjustment
• Adjust 1024*768 RGB adjustment
Above adjustment items can be also performed in Final
Assembly if needed. Both Board-level and Final assembly
adjustment items can be check using In-Start Menu 1. Adjust
Check.
• Adjust 1080p Component1 adjustment
• Adjust 1024*768 RGB adjustment
Above adjustment items can be also performed in Final
Assembly if needed. Both Board-level and Final assembly
adjustment items can be check using In-Start Menu 1. Adjust
Check.
3.2. Final assembly adjustment
• EDID/DDC download
• White Balance adjustment
• RS-232C functionality check
• Factory Option setting per destination
• Ship-out mode setting (In-Stop)
• White Balance adjustment
• RS-232C functionality check
• Factory Option setting per destination
• Ship-out mode setting (In-Stop)
3.3 Etc.
• Ship-out mode
• Service Option Default
• USB Download(S/W Update, Option)
• Service Option Default
• USB Download(S/W Update, Option)
4. Board-level adjustment
4.1. ADC adjustment
(1) Overview
ADC adjustment is needed to find the optimum black level
and gain in Analog-to-Digital device and to compensate
RGB deviation.
and gain in Analog-to-Digital device and to compensate
RGB deviation.
(2) Equipment & Condition
(3) Adjustment
1) Method
• Using RS-232, adjust items listed in 3.1 in the order
shown in “4.1.3.3”.
2) Adjustment protocol
3) Adjustment order
• ad 00 00 [Enter ADC adjustment mode]
• kb 00 04 [Component1 Input Change]
• ad 00 10 [Adjust 480i Component1]
• ad 00 10 [Adjust 1080p Component1]
• kb 00 06 [RGB Input Change]
• ad 00 10 [Adjust 1024*768 RGB]
• ad 00 90 [End adjustment mode]
• kb 00 04 [Component1 Input Change]
• ad 00 10 [Adjust 480i Component1]
• ad 00 10 [Adjust 1080p Component1]
• kb 00 06 [RGB Input Change]
• ad 00 10 [Adjust 1024*768 RGB]
• ad 00 90 [End adjustment mode]
Protocol Command
Set
ack
Source Input
kb 00 04
b 00 OK04x (Adjust 480i/1080p Comp1 )
Change
kb 00 06
b 00 OK06x (Adjust 1024*768 RGB)
Begin adj.
ad 00 10
Return
OKx (Success)
adj. result
NGx (Fail)
Read
(main)
(main input )
adj. data
ad0020
0000000000000000000000007c007b006dx
(sub )
(Sub input)
ad 00 21
000000070000000000000000007c00830077x
Confirm adj.
ad 00 99
NG 03 00x (Fail)
NG 03 01x Fail)
NG 03 02x (Fail )
OK 03 03x (Success)
End adj.
ad 00 90
d 00 OK90x
5. Final Assembly adjustment
5.1. ADC(Saturn5) adjustment
(1) Overview
ADC adjustment is needed to find the optimum black level
and gain in Analog-to-Digital device and to compensate
RGB deviation.
and gain in Analog-to-Digital device and to compensate
RGB deviation.
(2) Equipment & Condition
1) IN-START. remote
2) 801GF(802B, 802F, 802R) or MSPG925FA Pattern
2) 801GF(802B, 802F, 802R) or MSPG925FA Pattern
Generator
- Resolution:
480i Comp1 (MSPG-925FA: model-209, pattern-65)
1080p Comp1 (MSPG-925FA: model-225 , pattern-65)
1024*768 RGB (MSPG-925FA: model-60 , pattern-65)
1080p Comp1 (MSPG-925FA: model-225 , pattern-65)
1024*768 RGB (MSPG-925FA: model-60 , pattern-65)
- Pattern Name: Horizontal 100% Color Bar Pattern
- Pattern Level: 0.7±0.1 Vp-p
- Image
- Pattern Level: 0.7±0.1 Vp-p
- Image
3) Use the certificated cable.
(3) Method
1) ADC 480i Comp1
Set Component 480i mode and 100% Horizontal Color
Bar Pattern(HozTV31Bar), then set TV set to
Component1 mode and its screen to “NORMAL”.
After get the signal, wait more a second and enter the
“In START” with press In-Start key of Service remocon.
After then select “6. External ADC-> Comp 480i” with
navigator button and press “Enter”. It is automatically
adjustment.
You can see “ADC Component Success” message after
Adjustment success Error Messages: When its
adjustment is not correct, “ADC Component
Fail”message displayed.
If its signal don’t out, then “Check Signal Status”
message displayed. These messages will be displayed
just a second.
Bar Pattern(HozTV31Bar), then set TV set to
Component1 mode and its screen to “NORMAL”.
After get the signal, wait more a second and enter the
“In START” with press In-Start key of Service remocon.
After then select “6. External ADC-> Comp 480i” with
navigator button and press “Enter”. It is automatically
adjustment.
You can see “ADC Component Success” message after
Adjustment success Error Messages: When its
adjustment is not correct, “ADC Component
Fail”message displayed.
If its signal don’t out, then “Check Signal Status”
message displayed. These messages will be displayed
just a second.
2) ADC 1080p Comp1
Set Component 1080P mode and 100% Horizontal
Color Bar Pattern(HozTV31 Bar), then set TV set to
Component1 mode and its screen to “NORMAL”
After get the signal, wait more a second and enter the
“In START” with press In-Start key of Service remocon.
After then select “6. External ADC-> Comp 1080P” with
navigator button and press “Enter”. It is automatically
adjustment
You can see “ADC Component Success” message after
Adjustment success Error Messages: When its
adjustment is not correct, “ADC Component Fail”
message displayed.
If its signal don’t out, then “Check Signal Status”
message displayed. These messages will be displayed
just a second.
Color Bar Pattern(HozTV31 Bar), then set TV set to
Component1 mode and its screen to “NORMAL”
After get the signal, wait more a second and enter the
“In START” with press In-Start key of Service remocon.
After then select “6. External ADC-> Comp 1080P” with
navigator button and press “Enter”. It is automatically
adjustment
You can see “ADC Component Success” message after
Adjustment success Error Messages: When its
adjustment is not correct, “ADC Component Fail”
message displayed.
If its signal don’t out, then “Check Signal Status”
message displayed. These messages will be displayed
just a second.
3) ADC 1024*768 RGB-PC
Set RGB-PC 1024*768 mode and 100% Horizontal
Color Bar Pattern(HozTV31Bar), then set TV set to
Component1 mode and its screen to “NORMAL”
After get the signal, wait more a second and enter the
“IN START” with press In-Start key of Service remocon.
After then select “6. External ADC-> RGB” with
navigator button and press “Enter”. It is automatically
adjustment
You can see “ADC Component Success” message after
Adjustment success Error Messages: When its
adjustment is not correct, “ADC Component Fail”
message displayed.
If its signal don’t out, then “Check Signal Status”
message displayed. These messages will be displayed
just a second.
Component1 mode and its screen to “NORMAL”
After get the signal, wait more a second and enter the
“IN START” with press In-Start key of Service remocon.
After then select “6. External ADC-> RGB” with
navigator button and press “Enter”. It is automatically
adjustment
You can see “ADC Component Success” message after
Adjustment success Error Messages: When its
adjustment is not correct, “ADC Component Fail”
message displayed.
If its signal don’t out, then “Check Signal Status”
message displayed. These messages will be displayed
just a second.
5.2. EDID / DDC download
(The Extended Display Identification Data / Display Data
Channel)
Channel)
(1) Overview
It is a VESA regulation. APC or a MNT will display an
optimal resolution through information sharing without any
necessity of user input. It is a realization of “Plug and
Play”.
optimal resolution through information sharing without any
necessity of user input. It is a realization of “Plug and
Play”.
(2) Equipment
1) Adj. R/C
2) Since embedded EDID data is used, EDID download jig,
2) Since embedded EDID data is used, EDID download jig,
HDMI cable and D-sub cable are not need.
(3) Download method
Press Adj. key On the Adj. R/C, press Adj. key then select
EDID D/L. By pressing Enter key, EDID download will
begin.
1) If Download is successful, OK is displayed.
2) If Download is a failure, NG is displayed.
3) Re-try download.
EDID D/L. By pressing Enter key, EDID download will
begin.
1) If Download is successful, OK is displayed.
2) If Download is a failure, NG is displayed.
3) Re-try download.
(4) EDID DATA
1) Reference: Download is only possible in POWER ON
MODE.
2) HDMI I [C/S: 8A27]
EDID Block 0 table =
EDID Block 1 table =
- 12 -
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
0
00
FF
FF
FF
FF
FF
FF
00
1E
6D
01
00
01
01
01
01
10
00
11
01
03
80
73
41
96
0A
CF
74
A3
57
4C
B0
23
20
09
48
4C
AF
CF
00
31
40
45
40
61
40
81
80
A9
40
30
01
01
01
01
01
01
66
21
50
B0
51
00
1B
30
40
70
40
36
00
C4
8E
21
00
00
1E
02
3A
80
18
71
38
2D
40
50
58
2C
45
00
C4
8E
21
00
00
1E
00
00
00
FD
00
30
60
58
1F
64
11
00
0A
20
20
20
20
20
20
00
00
00
FC
70
00
4C
47
20
54
56
0A
20
20
20
20
20
20
20
01
8A
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
0
02
03
18
F1
47
84
05
03
02
20
22
10
23
15
07
50
10
67
03
0C
00
10
00
B8
2D
01
1D
80
18
71
1C
16
20
20
58
2C
25
00
C4
8E
21
00
00
9E
01
1D
00
72
51
D0
30
1E
20
62
28
55
00
C4
8E
21
00
00
1E
8C
0A
D0
8A
40
20
E0
2D
10
10
3E
96
00
C4
8E
21
00
00
18
8C
0A
50
D0
8A
20
E0
2D
10
10
3E
96
00
13
8E
21
00
00
18
60
26
36
80
A0
70
38
1F
40
30
20
25
00
C4
8E
21
00
70
00
1A
00
00
00
00
00
00
00
00
00
00
00
00
00
27
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