LG 37LB7DF (CHASSIS:LT75A) Service Manual ▷ View online
- 9 -
2) 42LB7DF
No
Item
Min
Typ
Max
Unit
Measurement Result
Remark
1
Viewing R/L
178
Viewing
R/L
178
Angle<CR>10>
U/D
178
Angle
U/D
178
<CR>10>
2.
White average
42LB7DF
450
550
-
cd/m
2
- 100IRE Full White Pattern (255 gray)
brightness
- Picture : Dynamic (Cool)
3.
Brightness uniformity
1.3
0
1.3
cd/m
2
- 100IRE Full White Pattern (255 gray)
- Picture : Dynamic (Cool)
4.
Color
White
X
0.276
0.279
0.282
- 85IRE Full White Pattern (216 gray)
Coordinate
Y
0.289
0.292
0.295
- Picture : Dynamic (Cool)
Red
X
0.637
0.640
0.643
Y
0.340
0.343
0.347
Green
X
0.284
0.287
0.290
Y
0.610
0.613
0.616
Blue
X
0.141
0.144
0.147
Y
0.062
0.065
0.068
5.
Color coordinate uniformity
-0.03
Average +0.03
- 85IRE Full White Pattern (216 gray)
- Picture : Dynamic (Cool)
6.
Contrast Ratio
CR with
7000 : 1 10,000 : 1
- Full white(100IRE)
at dark room
PWM-Dimming
- Full black(0IRE) pattern
- Picture : Dynamic (Cool)
- Input : HDMI1,2
=> CR with PWM-Dimming
CR without
650:1
1,000:1
- Input : DTV/Analog/AV/Comp/RGB/HDMI
PWM-Dimming
=> CR without PWM-Dimming
7.
Color Temperature
Medium
8300
9300
10300
- 85IRE Full White Pattern (216 gray)
Warm
5500
6500
7500
- Picture : Dynamic (Cool)
Cool
10000
11000
12000
8.
Color pull in Range
PAL
-500
+500
Hz
NTSC
-500
+500
Hz
9.
Color killer Sensitivity
-80
dBm
9. Average Brightness & Contrast measure standard specification
1) Standard Test Condition
2) Surrounding Brightness Level: dark
3) Surrounding Temperature: 25±2°C
4) Warm-up Time: 30 Min
5) Input Signal: HDMI 1920x1080p 60Hz
2) Surrounding Brightness Level: dark
3) Surrounding Temperature: 25±2°C
4) Warm-up Time: 30 Min
5) Input Signal: HDMI 1920x1080p 60Hz
- 10 -
10. Component Video Input (Y, P
B
, P
R
)
No
Resolution
H-freq(kHz)
V-freq.(Hz)
Pixel clock(MHz)
Proposed
1
720*480
15.73
59.94
13.500
SDTV, DVD 480I(525I)
2
720*480
15.75
60.00
13.514
SDTV, DVD 480I(525I)
3
720*480
31.47
59.94
27.000
SDTV 480P
4
720*480
31.50
60.00
27.027
SDTV 480P
5
1280*720
44.96
59.94
74.176
HDTV 720P
6
1280*720
45.00
60.00
74.250
HDTV 720P
7
1920*1080
33.72
59.94
74.176
HDTV 1080I
8
1920*1080
33.75
60.00
74.250
HDTV 1080I
9
1920*1080
67.50
60.00
148.50
HDTV 1080P
11. RGB Input ( PC )
No
Resolution
H-freq(kHz)
V-freq.(Hz)
Pixel clock(MHz)
Proposed
Remarks
1.
720*400
31.468
70.08
28.32
2.
640*480
31.469
59.94
25.17
VESA
848*480 60Hz, 852*480 60Hz
37.500
75.00
31.50
=> Display 640*480 60H
3
800*600
37.879
60.31
40.00
VESA
46.875
75.00
49.50
4.
832*624
49.725
74.55
57.283
Macintosh
5
1024*768
48.363
60.00
65.00
VESA(XGA)
56.476
70.00
75.00
60.023
75.03
78.75
6
1280*768
47.693
59.99
80.125
WXGA
7
1360*768
47.649
59.94
84.625
WXGA
8
1366*768
47.649
59.94
84.625
WXGA
9
1280*1024
63.595
60.0
108.875
SXGA
10
1400*1050
65.160
60.0
122.50
SXGA
11
1920*1080
66.647
59.988
138.625
WUXGA
Reduced Blanking Timing
- 11 -
12. HDMI DTV
- HDMI DTV Table
13. HDMI DTV
- HDMI PC Table
No
Resolution
H-freq(kHz)
V-freq.(kHz)
Pixel clock(MHz)
Propose
Remarks
1.
720*480
31.47
59.94
27.00
SDTV 480P(4:3)
PC mode => Display 640*480
2.
720*480
31.50
60
27.027
SDTV 480P(4:3)
3.
640*480
31.469
59.94
25.175
SDTV 480P(4:3)
4.
640*480
31.469
60.00
25.20
SDTV 480P(4:3)
5.
720*480
31.47
59.94
27.000
SDTV 480P(16:9)
6.
720*480
31.50
60.00
27.027
SDTV 480P(16:9)
7.
720*576
31.25
50.00
27.000
SDTV 576P
8.
1280*720
37.50
50.00
74.176
HDTV 720P
9.
1280*720
44.96
59.94
74.176
HDTV 720P
PC mode =>Display 1280*768 60Hz
10.
1280*720
45.00
60.00
74.250
HDTV 720P
11
1920*1080
33.72
59.94
74.176
HDTV 1080I
12
1920*1080
33.75
60.00
74.250
HDTV 1080I
13
1920*1080
28.125
50.00
74.250
HDTV 1080I 50Hz
14
1920*1080
27.000
24.00
74.250
HDTV 1080P 24Hz
15
1920*1080
56.250
50
148.500
HDTV 1080P 50Hz
16
1920*1080
67.433
59.94
148.352
HDTV 1080P
PC mode =>Display 1920*1080 60Hz
17
1920*1080
67.500
60
148.500
HDTV 1080P
No
Resolution
H-freq(kHz)
V-freq.(kHz)
Pixel clock(MHz)
Propose
Remarks
1.
720*400
31.468
70.08
28.32
2.
640*480
31.469
59.94
25.17
VESA
DTV mode => Display 480p
37.500
75.00
31.50
848*480 60Hz, 852*480 60Hz:
Display No signal
3
800*600
37.879
60.31
40.00
VESA
46.875
75.00
49.50
4.
832*624
49.725
74.55
57.283
Macintosh
5
1024*768
48.363
60.00
65.00
VESA(XGA)
56.476
70.00
75.00
60.023
75.03
78.75
6
1280*768
47.693
59.99
80.125
WXGA
7
1360*768
47.649
59.94
84.625
WXGA
8
1366*768
47.649
59.94
84.625
WXGA
9
1280*1024
63.595
60.0
108.875
SXGA
10
1400*1050
65.160
60.0
122.50
SXGA
11
1920*1080
66.647
59.988
138.625
WUXGA
Reduced Blanking Timing
DTV mode =>1080P Display
- 12 -
ADJUSTMENT INSTRUCTION
1. Application Object
These instructions are applied to all of the LCD TV, LT75A.
2. Specification
2.1 Because this is not a hot chassis, it is not necessary to
use an isolation transformer.
However, the use of isolation transformer will help to
protect test instruments.
However, the use of isolation transformer will help to
protect test instruments.
2.2 Adjustment must be done in the correct sequence.
2.3 The adjustment must be performed at 25±5°C
2.3 The adjustment must be performed at 25±5°C
temperature and 65±10% relative humidity if there is no
specified designation.
specified designation.
2.4 The input voltage of the receiver must be kept between
100~220V, 50/60Hz.
2.5 Before adjustment, execute Heat-Run for 30 minutes at
RF no signal.
3. EDID
* Caution
Use the proper signal cable for EDID Download
- Analog EDID : Pin3 exists
- Digital EDID : Pin3 exists
Use the proper signal cable for EDID Download
- Analog EDID : Pin3 exists
- Digital EDID : Pin3 exists
* Caution
- Never connect HDMI & D-sub Cable at the same time.
- Use the proper cables below for EDID Writing.
- Download HDMI1, HDMI2 separately because HDMI1 is
- Never connect HDMI & D-sub Cable at the same time.
- Use the proper cables below for EDID Writing.
- Download HDMI1, HDMI2 separately because HDMI1 is
different from HDMI2.
3.1 Data
1> ANALOG(128 Byte)
1> ANALOG(128 Byte)
2> HDMI (256 Byte)
3> HDMI2 (256 Byte)
C/S
00
20
20
20
20
20
20
0A
00
0E
43
1D
4B
3C
00
0x07
FD
00
00
00
20
20
20
20
20
20
20
0A
56
54
20
47
0x06
4C
00
FC
00
00
00
18
00
00
21
86
BC
04
85
20
50
0x05
40
1F
38
70
A0
80
36
26
1C
00
00
21
86
BC
00
35
0x04
88
48
30
1E
00
51
A0
50
21
1B
01
01
01
01
01
01
0x03
01
01
C0
D1
40
61
40
45
40
31
00
6E
A5
4B
49
11
0x02
25
9C
49
57
A3
B0
D9
EA
78
27
46
01
03
01
Month/Year
0x01
Serial No
Product ID
6D
1E
00
FF
FF
FF
FF
FF
FF
00
0x00
0x0F
0x0E
0x0D
0x0C
0x0B
0x0A
0x09
0x08
0x07
0x06
0x05
0x04
0x03
0x02
0x01
0x00
C/A
00
00
00
00
18
00
00
21
88
BC
00
37
80
40
30
0x07
1E
00
51
80
00
1F
4E
18
00
00
21
8E
C4
00
55
40
0x06
0C
20
31
40
20
90
D0
0A
8C
9E
00
00
21
8E
C4
80
0x05
25
2C
10
20
16
1C
72
D0
80
1D
01
1E
00
00
21
8E
0x04
C4
00
55
28
6E
20
1E
D0
51
72
00
1D
01
1E
00
00
0x03
21
8E
C4
40
55
28
B8
20
1E
D0
52
BC
00
1D
01
00
0x02
10
00
0C
03
65
00
00
01
83
07
07
09
23
10
22
20
0x01
1F
21
05
14
04
13
12
03
01
11
02
4E
F1
21
03
02
0x00
C/S
01
20
20
20
20
20
20
0A
00
0F
43
1C
4B
32
00
0x07
FD
00
00
00
20
20
20
20
20
20
20
0A
56
54
20
47
0x06
4C
00
FC
00
00
00
1C
00
00
21
86
BC
00
35
88
48
0x05
30
1E
00
51
A0
50
21
1B
1E
00
00
21
8E
C4
00
45
0x04
2C
58
40
2D
38
71
18
80
3A
02
01
01
01
01
01
01
0x03
01
01
C0
D1
40
61
40
45
40
31
00
6E
A5
4B
49
11
0x02
25
9C
49
57
A3
B0
D9
EA
78
27
46
80
03
01
Month/Year
0x01
Serial No
Product ID
6D
1E
00
FF
FF
FF
FF
FF
FF
00
0x00
0x0F
0x0E
0x0D
0x0C
0x0B
0x0A
0x09
0x08
0x07
0x06
0x05
0x04
0x03
0x02
0x01
0x00
C/A
00
00
00
00
18
00
00
21
88
BC
00
37
80
40
30
0x07
1E
00
51
80
00
1F
4E
18
00
00
21
8E
C4
00
55
40
0x06
0C
20
31
40
20
90
D0
0A
8C
9E
00
00
21
8E
C4
80
0x05
25
2C
10
20
16
1C
72
D0
80
1D
01
1E
00
00
21
8E
0x04
C4
00
55
28
6E
20
1E
D0
51
72
00
1D
01
1E
00
00
0x03
21
8E
C4
40
55
28
B8
20
1E
D0
52
BC
00
1D
01
00
0x02
20
00
0C
03
65
00
00
01
83
07
07
09
23
10
22
20
0x01
1F
21
05
14
04
13
12
03
01
11
02
4E
F1
21
03
02
0x00
C/S
01
20
20
20
20
20
20
0A
00
0F
43
1C
4B
32
00
0x07
FD
00
00
00
20
20
20
20
20
20
20
0A
56
54
20
47
0x06
4C
00
FC
00
00
00
1C
00
00
21
86
BC
00
35
88
48
0x05
30
1E
00
51
A0
50
21
1B
1E
00
00
21
8E
C4
00
45
0x04
2C
58
40
2D
38
71
18
80
3A
02
01
01
01
01
01
01
0x03
01
01
C0
D1
40
61
40
45
40
31
00
6E
A5
4B
49
11
0x02
25
9C
49
57
A3
B0
D9
EA
78
27
46
80
03
01
Month/Year
0x01
Serial No
Product ID
6D
1E
00
FF
FF
FF
FF
FF
FF
00
0x00
0x0F
0x0E
0x0D
0x0C
0x0B
0x0A
0x09
0x08
0x07
0x06
0x05
0x04
0x03
0x02
0x01
0x00
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