DOWNLOAD LG 42LA7400 / 42LA740Y (CHASSIS:LB33B) Service Manual ↓ Size: 11.31 MB | Pages: 119 in PDF or view online for FREE

Model
42LA7400 42LA740Y (CHASSIS:LB33B)
Pages
119
Size
11.31 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD
File
42la7400-42la740y-chassis-lb33b.pdf
Date

LG 42LA7400 / 42LA740Y (CHASSIS:LB33B) Service Manual ▷ View online

- 6 -
SPECIFICATION
NOTE : Specifications and others are subject to change without notice for improvement.
1. Application range
This  specification  is  applied  to  the  LED  TV  used  LB33B 
chassis.
2. Requirement for Test
Each part is tested as below without special appointment.
1) Temperature: 25 °C ± 5 °C(77 °F ± 9 °F), CST: 40 °C ± 5 °C
2) Relative Humidity: 65 % ± 10 %
3) Power Voltage
: Standard input voltage (AC 100-240 V~, 50/60 Hz)
* Standard Voltage of each products is marked by models.
4)  Specification  and  performance  of  each  parts  are  followed 
each  drawing  and  specification  by  part  number  in 
accordance with BOM.
5)  The receiver must be operated for about 20 minutes prior to 
the adjustment.
3. Test method
1) Performance: LGE TV test method followed 
2) Demanded other specification 
- Safety : CE, IEC specification
- EMC : CE, IEC 
4. Model General Specification
No.
Item
Specification
Remarks
1
Market
(PAL/DVB Market)
Australia/New Zealand(AU), Singapore(SG), 
Indonesia(ID),Malaysia(MY), Vietnam(VN), South 
only Analog for A-ASIA
2
Broadcasting system
1) PAL/SECAM-B/G/D/K
2) PAL-I/II
3) NTSC-M
4) DVB-T
PAL for NZ/SG
3
Channel Storage
ATV – 135EA, DTV – 1000EA
4
Receiving system
Analog : Upper Heterodyne
Digital : COFDM(DVB-T)
► DVB-T
- Guard Interval(Bitrate_Mbit/s)
  1/4, 1/8, 1/16, 1/32
- Modulation : Code Rate
  QPSK : 1/2, 2/3, 3/4, 5/6, 7/8
  16-QAM : 1/2, 2/3, 3/4, 5/6, 7/8
  64-QAM : 1/2, 2/3, 3/4, 5/6, 7/8
5.
Video Input RCA 
PAL, SECAM, NTSC
4 System : PAL, SECAM, NTSC, PAL60
6
Component Input 
Y/Pb/Pr
7
Head phone out
Antenna, AV1, Component, HDMI1, 
HDMI2, HDMI3, USB1, USB2, USB3
8
HDMI Input 
HDMI1-DTV,HDMI2-DTV
HDMI3-DTV
PC(HDMI Ver. 1.4)
Support HDCP
9
Audio Input
DVI Audio
Component
AV1
10
SPDIF out 
SPDIF out
11
USB Input
For My Media(Movie/Photo/Music List)
or For SVC
- 7 -
5. Component Video Input (Y, P
b
, P
r
)
No.
Resolution
H-freq(kHz)
V-freq(Hz)
Propose
1.
720×480
15.73
60.00
SDTV, DVD 480i
2.
720×480
15.63
59.94
SDTV, DVD 480i
3.
720×480
31.47
59.94
480p
4.
720×480
31.50
60.00
480p
5.
720×576
15.625
50.00
SDTV, DVD 625 Line
6.
720×576
31.25
50.00
HDTV 576p
7.
1280×720
45.00
50.00
HDTV 720p
8.
1280×720
44.96
59.94
HDTV 720p
9.
1280×720
45.00
60.00
HDTV 720p
10.
1920×1080
31.25
50.00
HDTV 1080i
11.
1920×1080
33.75
60.00
HDTV 1080i
12.
1920×1080
33.72
59.94
HDTV 1080i
13.
1920×1080
56.250
50
HDTV 1080p
14.
1920×1080
67.5
60
HDTV 1080p
- 8 -
6.2. PC mode
No.
Resolution
H-freq(kHz)
V-freq(Hz)
Propose
Remark
1
640 x 350 @70Hz
31.468
70.09
EGA
2
720 x 400 @70Hz
31.469
70.08
DOS
3
640 x 480 @60Hz
31.469
59.94
VESA(VGA)
4
800 x 600 @60Hz
37.879
60.31
VESA(SVGA)
5
1024 x 768 @60Hz
48.363
60
VESA(XGA)
6
1152 x 864 @60Hz
54.348
60.053
VESA
7
1280 x 1024 @60Hz
63.981
60.02
VESA(SXGA)
FHD only(Support to HDMI-PC)
8
1360 x 768 @60Hz
47.712
60.015
VESA(WXGA)
9
1920 x 1080 @60Hz
67.5
60
WUXGA(Reduced Blanking) FHD only
No.
Resolution
H-freq(kHz)
V-freq(Hz)
Pixel clock(MHz)
Propose
1
640*480
31.469 / 31.5
59.94 / 60
SDTV 480P
2
720*480
31.469 / 31.5
59.94 / 60
27.00/27.03
SDTV 480P
3
720*576
31.25
50
54
SDTV 576P
4
720*576
15.625
50
SDTV 576I
5
1280*720
37.500
50
74.25
HDTV 720P
6
1280*720
44.96 / 45
59.94 / 60
74.17/74.25
HDTV 720P
7
1920*1080
33.72 / 33.75
59.94 / 60
74.17/74.25
HDTV 1080I
8
1920*1080
28.125
50.00
74.25
HDTV 1080I
9.
1920*1080
26.97 / 27
23.97 / 24
74.17/74.25
HDTV 1080P
10
1920*1080
25
HDTV 1080P
11
1920*1080
33.716/ 33.75
29.976/30.00
74.25
HDTV 1080P
12
1920*1080
56.250
50
148.5
HDTV 1080P
13
1920*1080
67.43 / 67.5
59.94 / 60
148.35/148.50
HDTV 1080P
6. HDMI Input
6.1. DTV mode
- 9 -
No.
Resolution
H-freq(kHz)
V-freq.(Hz)
Pixel clock(MHz)
VIC
3D input proposed mode
Proposed
1
640*480
31.469 / 31.5
59.94/ 60
25.125 / 25.2
1
Top-and-Bottom
Side-by-side(half)
Secondary(SDTV 480P)
Secondary(SDTV 480P)
2
62.938 / 63
59.94 / 60
50.35 / 50.4
1
Frame packing
Line alternative
Secondary(SDTV 480P)
(SDTV 480P)
3
31.469 / 31.5
59.94 / 60
50.35 / 50.4
1
Side-by-side(Full)
(SDTV 480P)
4
720*480
31.469 / 31.5
59.94 / 60
27.00/27.03
2,3
Top-and-Bottom
Side-by-side(half)
Secondary(SDTV 480P)
Secondary(SDTV 480P)
5
62.938 / 63
59.94 / 60
54 / 54.06
2,3
Frame packing
Line alternative
Secondary(SDTV 480P)
(SDTV 480P)
6
31.469 / 31.5
59.94 / 60
54 / 54.06
2,3
Side-by-side(Full)
(SDTV 480P)
7
720*576
31.25
50
27
17,18
Top-and-Bottom
Side-by-side(half)
Secondary(SDTV 576P)
Secondary(SDTV 576P)
8
62.5
50
54
17,18
Frame packing
Line alternative
Secondary(SDTV 576P)
(SDTV 576P)
9
31.25
50
54
17,18
Side-by-side(Full)
(SDTV 576P)
10
720*576
15.625
50
27
21
Top-and-Bottom
Side-by-side(half)
Secondary(SDTV 576I)
Secondary(SDTV 576I)
11
31.25
50
54
21
Frame packing
Field alternative
Secondary(SDTV 576I)
(SDTV 576I)
12
15.625
50
54
21
Side-by-side(Full)
(SDTV 576I) 
13
1280*720
37.500
50
74.25
19
Top-and-Bottom
Side-by-side(half)
Primary(HDTV 720P)
Primary(HDTV 720P)
14
75
50
148.5
19
Frame packing
Line alternative
Primary(HDTV 720P)
(HDTV 720P)
15
37.5
50
148.5
19
Side-by-side(Full)
 (HDTV 720P)
16
44.96 / 45
59.94 / 60
74.18/74.25
4
Top-and-Bottom
Side-by-side(half)
Primary(HDTV 720P)
Primary(HDTV 720P)
17
89.91 / 90
59.94 / 60
148.35/148.5
4
Frame packing
Line alternative
Primary(HDTV 720P)
(HDTV 720P)
18
44.96 / 45
59.94 / 60
148.35/148.5
4
Side-by-side(Full)
(HDTV 720P)
19
1920*1080
33.72 / 33.75
59.94 / 60
74.18/74.25
5
Top-and-Bottom
Side-by-side(half)
Secondary(HDTV 1080I)
Primary(HDTV 1080I)
20
67.432 / 67.5
59.94 / 60
148.35/148.5
5
Frame packing
Field alternative
Primary(HDTV 1080I)
(HDTV 1080I)
21
33.72 / 33.75
59.94 / 60
148.35/148.5
5
Side-by-side(Full)
(HDTV 1080I)
22
28.125
50.00
74.25
20
Top-and-Bottom
Side-by-side(half)
Secondary(HDTV 1080I)
Primary(HDTV 1080I)
23
56.25
50.00
148.5
20
Frame packing
Field alternative
Primary(HDTV 1080I)
(HDTV 1080I)
24
28.125
50.00
148.5
20
Side-by-side(Full)
(HDTV 1080I)
25
26.97 / 27
23.97 / 24
74.18/74.25
32
Top-and-Bottom
Side-by-side(half)
Primary(HDTV 1080P)
Primary(HDTV 1080P)
26
43.94 / 54
23.97 / 24
148.35/148.5
32
Frame packing
Line alternative
Primary(HDTV 1080P)
(HDTV 1080P)
27
26.97 / 27
23.97 / 24
148.35/148.5
32
Side-by-side(Full)
(HDTV 1080P)
28
28.125
25
74.25
33
Top-and-Bottom
Side-by-side(half)
Secondary(HDTV 1080P)
Secondary(HDTV 1080P)
29
56.25
25
148.5
33
Frame packing
Line alternative
Secondary(HDTV 1080P)
(HDTV 1080P)
30
28.125
25
148.5
33
Side-by-side(Full)
 (HDTV 1080P)
31
33.716 / 33.75
29.976 / 30.00
74.18/74.25
34
Top-and-Bottom
Side-by-side(half)
 Primary(HDTV 1080P)
Secondary(HDTV 1080P)
32
67.432 / 67.5
29.976 / 30.00
148.35/148.5
34
Frame packing
Line alternative
Primary(HDTV 1080P)
(HDTV 1080P)
33
33.716 / 33.75
29.976 / 30.00
148.35/148.5
34
Side-by-side(Full)
 (HDTV 1080P)
34
56.25
50
148.5
31
Top-and-Bottom
Side-by-side(half)
Primary(HDTV 1080P)
Secondary(HDTV 1080P)
35
67.43 / 67.5
59.94 / 60
148.35/148.50
16
Top-and-Bottom
Side-by-side(half)
Primary(HDTV 1080P)
Secondary(HDTV 1080P)
7. 3D Mode
7.1. HDMI 1.4b
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