DOWNLOAD LG 26LN45XX / 26LN4500 (CHASSIS:LJ31A / LD31T) Service Manual ↓ Size: 6.06 MB | Pages: 30 in PDF or view online for FREE

Model
26LN45XX 26LN4500 (CHASSIS:LJ31A LD31T)
Pages
30
Size
6.06 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD
File
26ln45xx-26ln4500-chassis-lj31a-ld31t.pdf
Date

LG 26LN45XX / 26LN4500 (CHASSIS:LJ31A / LD31T) 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  LJ31A  / 
LD31R 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 5 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)
2
Broadcasting system
1) PAL/SECAM-B/G/D/K
2) PAL-I
3) NTSC-M
4) DVB-T
3
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
4
Component Input (1EA) Y/Cb/Cr , Y/Pb/Pr
5
CVBS Input (1EA)
PAL, SECAM, NTSC
4 System(Rear) : PAL, SECAM, NTSC, PAL60
6
RGB Input
RGB-PC
Analog(D-SUB 15PIN)
7
HDMI Input (1EA)
HDMI1
Rear1EA / HDMI version 1.3/ support PC/ HDMI : MHL Support
8
Audio Input (2EA)
Component
CVBS
L/R Input
9
Headphone out (1EA)
Antenna, AV, Component, RGB, 
HDMI1
Angle 1EA
10 USB (1EA)
Picture, Music, Movie, SVC
Software Update + Picture + Music + Movie
11
Local Key (Touch)
- 7 -
5. Timing
5.1. RGB/HDMI (PC)
No.
Specification
Remark
Resolution
H-freq(kHz)
V-freq.(Hz)
Pixel clock(MHz)
1.
720*400
31.468
70.080
28.321
2.
640*480
31.469
59.940
25.175
3.
640*480
37.500
75.000
31.500
4.
800*600
37.879
60.317
40.000
5.
800*600
46.875
75.000
49.500
6.
1024*768
48.363
60.004
65.000
7.
1024*768
60.023
75.029
78.750
8.
1280*800
49.702
59.810
83.500
9.
1366*768
47.717
59.79
85.5
5.2. HDMI (DTV)
No.
Specification
Remark
Resolution
H-freq(kHz)
V-freq.(Hz)
Pixel clock(MHz)
1.
720*480
31.469 
31.5000
59.940 
60.000
27.000
27.030 
SDTV 480P
2.
720*576
31.250
50.000
27.864
SDTV 576P
3.
1280*720
37.500
50.000
74.250
HDTV 720P
4.
1280*720
44.960
45.000
59.940 
60.000
74.170
74.250
HDTV 720P
5.
1920*1080
33.720
33.750
59.940 
60.000
74.170
74.250
HDTV 1080I
6.
1920*1080
28.125
50.000
74.250
HDTV 1080I
7.
1920*1080
27.000
24.000
74.250
HDTV 1080P
8.
1920*1080
33.750
30.000
74.250
HDTV 1080P
9.
1920*1080
56.250
50.000
148.500
HDTV 1080P
10.
1920*1080
67.430
67.500
59.940
60.000
148.350
148.500
HDTV 1080P
- 8 -
5.3. Component
No.
Specification
Remark
Resolution
H-freq(kHz)
V-freq.(Hz)
Pixel clock(MHz)
1.
720*480
15.730
59.940
13.500
SDTV, DVD 480I(525I)
2.
720*480
15.750
60.000
13.514
SDTV, DVD 480I(525I)
3.
720*576
15.625
50.000
13.500
SDTV, DVD 576I(625I) 50Hz
4.
720*480
31.470
59.940
27.000
SDTV 480P
5.
720*480
31.500
60.000
27.027
SDTV 480P
6.
720*576
31.250
50.000
27.000
SDTV 576P 50Hz
7.
1280*720
44.960
59.940
74.176
HDTV 720P
8.
1280*720
45.000
60.000
74.250
HDTV 720P
9.
1280*720
37.500
50.000
74.250
HDTV 720P 50Hz
10.
1920*1080
33.720
59.940
74.176
HDTV 1080I
11.
1920*1080
33.750
60.000
74.250
HDTV 1080I
12.
1920*1080
28.125
50.000
74.250
HDTV 1080I 50Hz, 
13.
1920*1080
56.250
50.000
148.500
HDTV 1080P
14.
1920*1080
67.432
59.940
148.350
HDTV 1080P
15.
1920*1080
67.500
60.000
148.500
HDTV 1080P
- 9 -
ADJUSTMENT INSTRUCTION
1. Application Range
This document is applied to LJ31A / LD31R chassis LED TV 
which  is  manufactured  in  TV(or  Monitor)  Factory  or  is 
produced on the basis of this data.
2. Designation
1)  The  adjustment  is  according  to  the  order  which  is 
designated  and  which  must  be  followed,  according  to  the 
plan which can be changed only on agreeing.
2) Power adjustment : Free Voltage.
3) Magnetic Field Condition: Nil.
4) Input signal Unit: Product Specification Standard.
5) Reserve after operation: Above 5 Minutes (Heat Run)
 Temperature : at 25 °C ± 5 °C
 Relative humidity : 65 % ± 10 %
 Input voltage : 110-240 V, 50/60 Hz
6)  Adjustment equipments: Color Analyzer(CA-210 or CA-110),  
DDC Adjustment Jig equipment, Service remote control.
7) Push The "IN STOP KEY" – For memory initialization
3. Main PCB check process
* APC - After Manual-Insult, executing APC
* Boot file Download
1)  Execute  ISP  program  “Mstar  ISP  Utility”  and  then  click 
“Config” tab.
2)  Set as below, and then click “Auto Detect” and check “OK” 
message.  If  display  “Error”,  Check  connect  computer,  jig, 
and set.
3)  Click  “Connect”  tab.  If  display  “Can’t”,  Check  connect 
computer, jig, and set.
4)  Click “Read” tab, and then load download file(XXXX.bin) by 
clicking “Read”.
5) Click “Auto” tab and set as below.
6) Click “Run”.
7) After downloading, check “OK” message.
*
 USB DOWNLOAD(*.epk file download)
1)  Make New folder named “LG_DTV” and put ISP file(*.epk) 
in the folder.
2) Put the USB Stick to the USB socket.
3) Automatically detecting update file in USB Stick
-  If your downloaded program version in USB Stick is Low, 
it didn’t work.
-   But  your  downloaded  version  is  High,  USB  data  is 
automatically detecting
4) Show the message "Copying files from memory"
5) Updating is starting.
6)  Updating  Completed,  The  Multi-vision  will  restart 
automatically.
7)  If  your TV  is  turned  on,  check  your  updated  version  and 
Tool option. (explain the Tool option, next stage)
    *  If  downloading  version  is  more  high  than  your TV  have, 
TV  can  lost  all  channel  data.  In  this  case,  you  have  to 
channel  recover. if all channel data is cleared, you didn’t 
have a DTV/ATV test on production line.
* After downloading, have to adjust TOOL OPTION again.
1. Push "ADJ" key in service remote control.
2. Select "Tool Option 1" and push "OK" key.
3. Punch in the number. (Each model has their number.)
4. Completed selecting Tool option.
Case1 : Software version up
1.  After downloading S/W by USB , TV set will reboot 
automatically.
2. Push “In-stop” key.
3. Push “Power on” key.
4. Function inspection
5. After function inspection, Push “In-stop” key.
Case2 : Function check at the assembly line
1.  When TV set is entering on the assembly line, Push 
“In-stop” key at first.
2. Push “Power on” key for turning it on.
→  If you push “Power on” key, TV set will recover 
channel information by itself.
3. After function inspection, Push “In-stop” key.
 
(1) 
(3) 
(2)                    OK
Please Check the Speed :   
Use the speed under 
200KHz. 
 
(4) 
filexxx.bin
 
 
 
(6) 
(5) 
(7) ……….OK 
(5) 
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