DOWNLOAD LG 62LM620S / 62LM620T (CHASSIS:LD22E) Service Manual ↓ Size: 10.53 MB | Pages: 118 in PDF or view online for FREE

Model
62LM620S 62LM620T (CHASSIS:LD22E)
Pages
118
Size
10.53 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD
File
62lm620s-62lm620t-chassis-ld22e.pdf
Date

LG 62LM620S / 62LM620T (CHASSIS:LD22E) Service Manual ▷ View online

- 7 -
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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