LG 42LM670S / 42LM670T / 42LM671S / 42LM671T (CHASSIS:LD22E) Service Manual ▷ View online
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No.
Item
Specification
Remarks
2
Broadcasting system
1) PAL-BG
2) PAL-DK
3) PAL-I/I’
4) SECAM L/L’, DK, BG, I
5) DVB-T
6) DVB-C
7) DVB-T2
8) DVB-S
DVB-S: Satellite
3
Receiving system
Analog : Upper Heterodyne
Digital : COFDM, QAM
► 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
► DVB-T2
- Guard Interval(Bitrate_Mbit/s)
1/4, 1/8, 1/16, 1/32, 1/128, 19/128, 19/256,
- Modulation : Code Rate
QPSK : 1/2, 2/5, 2/3, 3/4, 5/6
16-QAM : 1/2, 2/5, 2/3, 3/4, 5/6
64-QAM : 1/2, 2/5, 2/3, 3/4, 5/6
256-QAM : 1/2, 2/5, 2/3, 3/4, 5/6
► DVB-C
- Symbolrate :
4.0Msymbols/s to 7.2Msymbols/s
- Modulation :
16QAM, 64-QAM, 128-QAM and 256-QAM
► DVB-S/S2
- symbolrate
DVB-S2 (8PSK / QPSK) : 2 ~ 45Msymbol/s
DVB-S (QPSK) : 2 ~ 45Msymbol/s
- viterbi
DVB-S mode : 1/2, 2/3, 3/4, 5/6, 7/8
DVB-S2 mode : 1/2, 2/3, 3/4, 3/5, 4/5, 5/6, 8/9, 9/10
4
Scart Gender Jack (1EA) PAL, SECAM
Scart jack is Full scart and support MNT/DTV-OUT
(not support DTV Auto AV)
5
Video Input RCA(1EA)
PAL, SECAM, NTSC
4 System : PAL, SECAM, NTSC, PAL60
AV gender jack 1EA
6
Head phone out
Antenna, AV1, AV2, Component,
RGB, HDMI1, HDMI2, HDMI3,
HDMI4, USB1, USB2, USB3
7
Component Input (1EA)
Y/Cb/Cr
Y/Pb/Pr
Component Gender 1EA
8
RGB Input
RGB-PC
Analog(D-SUB 15PIN)
9
HDMI Input (4EA)
HDMI1-DTV
HDMI2-DTV
HDMI3-DTV
HDMI4-DTV
HDMI4 : PC support(HDMI version 1.3)
Support HDCP
10
Audio Input (3EA)
RGB/DVI Audio
Component
AV
L/R Input
11
SPDIF out (1EA)
SPDIF out
12
USB (3EA)
EMF, DivX HD, For SVC (download)
JPEG, MP3, DivX HD
13
Ethernet Connect(1EA)
Ethernet Connect
- 8 -
5. Component Video Input (Y, C
b
/P
b
, C
r
/P
r
)
6. RGB input (PC)
No.
Resolution
H-freq(kHz)
V-freq(Hz)
Porposed
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
No.
Resolution
H-freq(kHz)
V-freq.(Hz)
Proposed
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
60.00
VESA(XGA)
6
1152 x 864 @60Hz
54.348
60.053
VESA
7
1360 x 768 @60Hz
47.712
60.015
VESA(WXGA)
8
1920 x 1080 @60Hz
67.5
60.00
WUXGA(Reduced Blanking))
- 9 -
7. HDMI Input
7.1. DTV mode
No.
Resolution
H-freq(kHz)
V-freq.(kHz)
Proposed
1.
640*480
31.469 / 31.5
59.94/60
SDTV 480P
2.
720*480
31.469 / 31.5
59.94 / 60
SDTV 480P
3.
720*576
31.25
50
SDTV 576P
4.
720*576
15.625
50
SDTV 576I
5.
1280*720
37.500
50
HDTV 720P
6.
1280*720
44.96 / 45
59.94 / 60
HDTV 720P
7.
1920*1080
33.72 / 33.75
59.94 / 60
HDTV 1080I
8.
1920*1080
28.125
50.00
HDTV 1080I
9.
1920*1080
26.97 / 27
23.97 / 24
HDTV 1080P
10.
1920*1080
25
HDTV 1080P
11.
1920*1080
33.716 / 33.75
29.976 / 30.00
HDTV 1080P
12.
1920*1080
56.250
50
HDTV 1080P
13.
1920*1080
67.43 / 67.5
59.94 / 60
HDTV 1080P
No.
Resolution
H-freq(kHz)
V-freq.(Hz)
Proposed
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
60.00
VESA(XGA)
6
1152 x 864 @60Hz
54.348
60.053
VESA
7
1280 x 1024 @60Hz 63.981
60.020
VESA(SXGA)
8
1360 x 768 @60Hz
47.712
60.015
VESA(WXGA)
9
1920 x 1080 @60Hz 67.5
60.00
WUXGA(Reduced Blanking))
7.2. PC mode
- 10 -
ADJUSTMENT INSTRUCTION
1. Application Range
This specification sheet is applied to all of the LED LCD TV
with LD22E chassis.
2. Designation
(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.
(2) Adjustment must be done in the correct order.
(3) The adjustment must be performed in the circumstance of
25 °C ± 5 °C of temperature and 65 % ± 10 % of relative
humidity if there is no specific designation.
(4) The input voltage of the receiver must keep AC 100-240
V~, 50/60 Hz.
(5) The receiver must be operated for about 5 minutes prior to
the adjustment when module is in the circumstance of over
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.
[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.
3. Automatic Adjustment
3.1. ADC Adjustment
3.1.1. Overview
ADC adjustment is needed to find the optimum black level
and gain in Analog-to-Digital device and to compensate RGB
deviation.
3.1.2. Equipment & Condition
(1) USB to RS-232C Jig
(2) MSPG-925 Series Pattern Generator(MSPG-925FA,
pattern - 65)
- Resolution : 1080P Comp1
1920*1080 RGB
- Pattern : Horizontal 100% Color Bar Pattern
- Pattern level : 0.7 ± 0.1 Vp-p
- Image
3.1.3. Adjustment
(1) Adjustment method
▪ Don’t need to adjust ADC because there is data in OTP
and adjusted initially.
▪ Check ADC adjustment
1) Press In start key on the Adj. Remote Control, then
Adjust ADC(OTP) status is displayed on “1.Adjustment
check”. Select “2.ADC Data”, then ADC data is
displayed.
2) Press Adj. key on the Adjustmetn Remote Control, and
select “9.ADC Calibration”. Set up the ADC Type to
OTP, then Select [Start] button by pressing Enter key,
Component and RGB are Writed and display Success
or NG.
(2) Adj. protocol
Ref.) ADC Adj. RS232C Protocol_Ver1.0
(3) Adj. order
- aa 00 00 [Enter ADC adj. mode]
- xb 00 04 [Change input source to Component1 (480i&
1080p)]
- ad 00 10 [Adjust 480i&1080p Comp1]
- xb 00 06 [Change input source to RGB(1024*768)]
- ad 00 10 [Adjust 1920*1080 RGB]
- ad 00 90 End adj.
Protocol
Command
Set ACK
Enter adj. mode
aa 00 00
a 00 OK00x
Source change
xb 00 04
b 00 OK04x (Adjust 480i, 1080p Comp1 )
xb 00 06
b 00 OK06x (Adjust 1920*1080 RGB)
Begin adj.
ad 00 10
Return adj. result
OKx (Case of Success)
NGx (Case of Fail)
Read adj. data
(main)
ad 00 20
(main)
000000000000000000000000007c007b006dx
(sub )
(Sub)
000000070000000000000000007c00830077x
ad 00 21
Confirm adj.
ad 00 99
NG 03 00x (Fail)
NG 03 01x (Fail)
NG 03 02x (Fail)
OK 03 03x (Success)
End adj.
aa 00 90
a 00 OK90x
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