LG 37LT75 (CHASSIS:LD74A) Service Manual ▷ View online
- 9 -
8. HDMI input - DTV mode
No
Resolution
H-freq(kHz)
V-freq.(Hz)
Pixel clock(MHz)
Proposed
Remarks
1.
720*480
31.47
59.94
27.00
SDTV 480P(4:3)
PC mode => 640*480 60Hz Display
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 Ë 1280*720 60Hz Display
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 Ë1920*1080 60Hz Display
17
1920*1080
67.500
60
148.500
HDTV 1080P
8-1. HDMI input - PC mode
No
Resolution
H-freq(kHz)
V-freq.(Hz)
Pixel clock(MHz)
Proposed
Remarks
1.
720*400
31.468
70.08
28.321
2.
640*480
31.469
59.94
25.17
VESA
DTV mode => 480p Display
37.684
75.00
31.50
848*480 60Hz, 852*480 60Hz => 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)
56.470
70.00
75.00
60.123
75.029
78.75
6
1280*768
47.78
59.87
79.5
WXGA
PC mode only
7
1360*768
47.72
59.8
84.75
WXGA
8
1366*768
47.56
59.6
84.75
WXGA
9
1280*1024
63.595
60.0
108.875
SXGA
FHD Model only
10
1400*1050
65.160
60.0
122.50
SXGA
FHD Model only
11
1600*1200
74.077
60.0
130.375
UXGA
Reduced Blanking Timing, FHD Model only
Input 1920*1200 60Hz => No Signal
12
1920*1080
66.647
59.988
138.625
WUXGA
Reduced Blanking Timing
DTV mode => 1080P Display
- 10 -
8-2. HDMI EDID Data
[HDMI1]
[HDMI2]
- 11 -
ADJUSTMENT INSTRUCTION
1. Application Range
This spec. sheet is applied to all of the LD74A chassis
manufactured at LG TV Plant all over the world
manufactured at LG TV Plant all over the world
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
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±5ºC temperature
2.3 The adjustment must be performed at 25±5ºC temperature
and 65±10% relative humidity if there is no specified
designation.
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. Channel Memory
1) Press ADJ key in Adjust remocon.
2) Select "Channel Recover" by using
2) Select "Channel Recover" by using
/
(CH+/-) key,
and press
(VOL+).
3) The set is turned off automatically
4) Press ‘power’ key of Adjust Remocon.
4) Press ‘power’ key of Adjust Remocon.
4. EDID
Caution
* Use the proper signal cable for EDID Download
* Use the proper signal cable for EDID Download
- Analog EDID : Pin3 exists
- Digital EDID : Pin3 exists
* Caution: - Never connect HDMI & D-sub Cable at
- 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 different from
HDMI2.
HDMI2.
4.1. EDID Data
4.2. Data (Refer to Product specification)
1> ANALOG (128Bytes)
2> HDMI 1(256Bytes)
3> HDMI 2(256Bytes)
Item
Condition
Hex(16) Data
Manufacturer ID
GSM
1E6D
Version
Digital : 1
01
Revision
Digital : 3
03
00
01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
00 00
FF FF FF FF FF FF 00 1E 6D
10
01 03 01 46 27 78 EA D9 B0 A3 57 49 9C 25
20 11
49 4B A5 6E 00 31 40 45 40 61 40 D1 C0 01 01
30 01
01 01 01 01 01 1B 21 50 A0 51 00 1E 30 48 88
40 35
00 BC 86 21 00 00 1C 26 36 80 A0 70 38 1F 40
50 50
20 85 04 BC 86 21 00 00 18
60
00 00 00 FD
70 00 3C 4B 1D 43 0E 00 0A 20 20 20 20 20 20 00
00
01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
00 00
FF FF FF FF FF FF 00 1E 6D
10
01 03 80 46 27 78 EA D9 B0 A3 57 49 9C 25
20 11
49 4B A5 6E 00 31 40 45 40 61 40 D1 C0 01 01
30 01
01 01 01 01 01 02 3A 80 18 71 38 2D 40 58 2C
40 45
00 C4 8E 21 00 00 1E 1B 21 50 A0 51 00 1E 30
50 48
88 35 00 BC 86 21 00 00 1C
60
00 00 00 FD
70 00
32 4B 1C 43 0F 00 0A 20 20 20 20 20 20 01
00 02
03 21 F1 4E 02 11 01 03 12 13 04 14 05 21 1F
10 20
22 10 23 09 07 07 83 01 00 00 65 03 0C 00 10
20 00
01 1D 00 BC 52 D0 1E 20 B8 28 55 40 C4 8E 21
30 00
00 1E 01 1D 00 72 51 D0 1E 20 6E 28 55 00 C4
40 8E
21 00 00 1E 01 1D 80 D0 72 1C 16 20 10 2C 25
50 80 C4 8E 21 00 00 9E 8C 0A D0 90 20 40 31 20 0C
60 40
60 40
55 00 C4 8E 21 00 00 18 4E 1F 00 80 51 00 1E
70 30
40 80 37 00 BC 88 21 00 00 18 00 00 00 00
00
01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
00 00
FF FF FF FF FF FF 00 1E 6D ®Õ ®Œ
10
01 03 80 46 27 78 EA D9 B0 A3 57 49 9C 25
20 11
49 4B A5 6E 00 31 40 45 40 61 40 D1 C0 01 01
30 01
01 01 01 01 01 02 3A 80 18 71 38 2D 40 58 2C
40 45
00 C4 8E 21 00 00 1E 1B 21 50 A0 51 00 1E 30
50 48
88 35 00 BC 86 21 00 00 1C
60
00 00 00 FD
70 00
32 4B 1C 43 0F 00 0A 20 20 20 20 20 20 01
00 02
03 21 F1 4E 02 11 01 03 12 13 04 14 05 21 1F
10 20
22 10 23 09 07 07 83 01 00 00 65 03 0C 00 20
20 00
01 1D 00 BC 52 D0 1E 20 B8 28 55 40 C4 8E 21
30 00
00 1E 01 1D 00 72 51 D0 1E 20 6E 28 55 00 C4
40 8E
21 00 00 1E 01 1D 80 D0 72 1C 16 20 10 2C 25
50 80 C4 8E 21 00 00 9E 8C 0A D0 90 20 40 31 20 0C
60 40
60 40
55 00 C4 8E 21 00 00 18 4E 1F 00 80 51 00 1E
70 30
40 80 37 00 BC 88 21 00 00 18 00 00 00 00
a
a
d
d
d
e-2
e-2
f-1
f-2
d
c
c
c
d
b
b
a
b
d
e-1
- 12 -
Before AV ADC Calibration, should be
executed the "Tool option 1"
executed the "Tool option 1"
5. Select method of Tool option 1
5.1 Press ADJ Key in the Adjust remocon
5.2 Select "Tool option 1" by using
5.2 Select "Tool option 1" by using
/
(CH+/-) key, and press
(ENTER).
5.3 Select "Maker" by using
/
(CH+/-) key, and change the
module maker and. applied module classification by using
/
(VOL+/-).
5.4 Select "Inch" by using
/
(CH+/-) key, and change the
module according to the inch of model .
5.5 Select "Tool" by using
/
(CH+/-) key, and change the tool
name according to the model .
6. ADC Calibration
=> Caution : - System control RS-232 Host should be "PC" for
adjustment.
- Before AV ADC Calibration, execute the "Module
selection"
6.1 Adjustment of RF / AV / S-VIDEO
√ Required Equipments
• Remote controller for adjustment.
• MSPG-925FS Pattern Generator (Which has Video Signal:
• MSPG-925FS Pattern Generator (Which has Video Signal:
7 Color Bar Pattern shown in Fig. 1).
=> Model: 202 / Pattern: 65
6.1.1 Method of Auto RF/AV/S-VIDEO Color Balance (PAL_BGDHI).
1) Input the Video Signal: 7 Color Bar signal into AV3.
2) Set the PSM to Dynamic mode in the Picture menu.
2) Set the PSM to Dynamic mode in the Picture menu.
[Fig.1 Color Bar Signal]
3) Press IN-START key on R/C for adjustment.
[Fig.2 Color Bar Signal]
4) Press the
(Vol.+) key to operate the set, then it becomes
automatically.
5) Auto-RGB OK means the adjustment is completed.
6.2. Adjustment of Component
√Required Equipments
• Remote controller for adjustment.
• MSPG-925FS Pattern Generator. (Which has 720p/50Hz
• MSPG-925FS Pattern Generator. (Which has 720p/50Hz
YPbPr output Pattern shown in Fig. 2)
-> Model : 215 / Pattern : 65
6.2.1 Method of Auto Component Color Balance
1) Input the Component 720p/50Hz 7 Color Bar (MSPG-
925FS model:215, pattern:65) signal into Component.
2) Set the PSM to Dynamic mode in the Picture menu.
[Fig.3 Color Bar Signal]
3) Press the IN-START key on R/C for adjustment.
4) Press the
4) Press the
(Vol.+) key to operate the set , then it
becomes automatically.
[Fig.4 Color Bar Signal]
5) Auto-RGB OK means the adjustment is completed.
ADC
AV Component
RGB-PC
MSPG925FS
PALJ
Model:215 (720P)
INPUT SELECT
AV3
Pattern:65
Model: 60
Model:202(PAL-BGDHI)
*720P/50Hz
(1024*768 60Hz)
7 Color Bar
Pattern: 65
Pattern: 65
*PAL 7 Color Bar
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