Service Manual
REV 0.1
6
Contents
1.
PRODUCT INFOMATIONS.......................................................................................................................... 8
1.1
Serial Number Information
............................................................................................................. 8
1.2
Product specification
...................................................................................................................... 9
1.3
Overall blockdiagram for the panel
............................................................................................. 10
1.4
Input-Signal Timing(VESA)
............................................................................................................ 11
2.
TROUBLE SHOOTING .............................................................................................................................. 12
2.1
No Power
........................................................................................................................................ 14
2.2
No Video (LED for Power indicator: Green)
................................................................................ 16
2.3
No Video at DP input (LED for Power indicator: Green)
............................................................ 19
2.4
No Video at HDMI1 input (LED for Power indicator: Green)
..................................................... 20
2.5
No Video at HDMI2 input (LED for Power indicator: Green)
..................................................... 21
2.6
No Video at DVI input (LED for Power indicator: Green)
........................................................... 22
2.7
No Video at VGA input (LED for Power indicator: Green)
......................................................... 23
2.8
No Speaker-out from internal-speakers
...................................................................................... 24
2.9
The fault of Remote control
.......................................................................................................... 25
2.10
The fault of Key control pad
......................................................................................................... 26
2.11
Image overlap, focus or flicker
.................................................................................................... 27
2.12
Brightness defect
.......................................................................................................................... 28
2.13
Line defect / Block defect
............................................................................................................. 29
2.14
Partially color / Brightness uneven
............................................................................................. 29
2.15
Dot defect (Bright dot / Dark dot)
................................................................................................. 30
3.
DISASSEMBLY .......................................................................................................................................... 31
3.1
Rear-Cover Disassembly
.............................................................................................................. 31
3.2
Front disassembly
......................................................................................................................... 33
4.
REPAIR/CHANGE ACCORDING TO THE FAILED PARTS ...................................................................... 34
4.1
Repair/Change for A/D-Board
....................................................................................................... 34
4.2
Repair/Change for OSD Key Board
............................................................................................. 35
4.3
Repair/Change for SMPS
.............................................................................................................. 37
4.4
Repair/Change for Speaker unit (Only for Kortek)
..................................................................... 38
5.
RS-232 ....................................................................................................................................................... 39
5.1
RS-232 Connection
........................................................................................................................ 39
5.2
Serial Command List
..................................................................................................................... 40
5.3
Command Format
.......................................................................................................................... 40
6.
FIRMWARE UPDATE ................................................................................................................................ 42
6.1
Uploading the firmware for A/D board
......................................................................................... 42
7.
CONNECTION OF THE INTERNAL CABLES ........................................................................................... 45
Summary of Contents for KT-LL84ULFX-PD
Page 2: ...Service Manual REV 0 1 2 REVISION HISTORY REVISION DATE NOTE REV0 1 Jun 06 2015 1st issued ...
Page 24: ...Service Manual REV 0 1 24 2 8 No Speaker out from internal speakers ...
Page 25: ...Service Manual REV 0 1 25 2 9 The fault of Remote control ...
Page 26: ...Service Manual REV 0 1 26 2 10 The fault of Key control pad ...
Page 27: ...Service Manual REV 0 1 27 2 11 Image overlap focus or flicker ...
Page 28: ...Service Manual REV 0 1 28 2 12 Brightness defect ...
Page 33: ...Service Manual REV 0 1 33 3 2 Front disassembly 3 2 1 Remove bolts Remove FRONT cover ...
Page 36: ...Service Manual REV 0 1 36 ...
Page 46: ...Service Manual REV 0 1 46 2 Part number 109273 SUB SMPS CN7 AD B D W205 ...
Page 47: ...Service Manual REV 0 1 47 3 Part number 109272 Main SMPS CN4B SUB SMPS CN8 AD Main W200 ...
Page 48: ...Service Manual REV 0 1 48 4 Part number 109271 AD Main W804 5 Part number 109270 AD Main W803 ...
Page 49: ...Service Manual REV 0 1 49 6 Part number 109269 ...
Page 50: ...Service Manual REV 0 1 50 6 Part number 107545 Main SMPS CN4A SUB SMPS CN3 ...
Page 51: ...Service Manual REV 0 1 51 7 Part number 107542 OSD KEY ...
Page 52: ...Service Manual REV 0 1 52 8 Part number 110383 ...
Page 54: ...Service Manual REV 0 1 54 10 Part number 107536 SMPS Converter 11 Part number 107535 ...
Page 55: ...Service Manual REV 0 1 55 12 Part number 108481 ...
Page 56: ...Service Manual REV 0 1 56 41p 13 Part number 108482 ...
Page 64: ...Service Manual REV 0 1 64 10 2 Packaging 10 2 1 Unpacking ...