Download Service manual LM2130W

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ˉCATALOGˉ
1. Safety
item which should be paid attention to when maintaining......................................................... 1
2.Monitor appearance and hardware structure introduction...................................................................... 2
2-1 Front appearance drawing................................................................................................................................ 2
2-2 Back appearance drawing................................................................................................................................. 3
2-3 Explosion Drawing.............................................................................................................................................. 4
2-4 System Block Diagram...................................................................................................................................... 5
2-5 D-SUB Pin Definition........................................................................................................................................ 5
2-6 DVI Pin Definition............................................................................................................................................... 6
2-7 OSD key function.............................................................................................................................................. 6
3.Maintaining instruments and test equipment..................................................................................................... 8
3-1 Instruments............................................................................................................................................................... 8
3-2 Test equipment........................................................................................................................................................ 8
4.Problem analysis............................................................................................................................................................... 9
5.Monitor disassembly and assembly flow........................................................................................................... 14
6. Maintaining parts form............................................................................................................................................... 17
7.Principium.......................................................................................................................................................................... 17
7-1 AD Board Principium....................................................................................................................................... 21
7-1 Power Board Principium................................................................................................................................. 21
7-1 Inverter Board Principium.............................................................................................................................. 20
8.Test method after maintenance .............................................................................................................................. 21
8-1 Test method when disconnected with the PC....................................................................................... 21
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2.Monitor appearance and hardware structure introduction
2-1 Front appearance drawing
No
Function
1
It can show and change model 16:10/AUTO/4:3 when OSD
2
AUTO
3
MENU
4
POWER
Blue
Indicator
light
not shown.
Automatically adjust clock and phase when OSD is not shown, or press in
three consecutive seconds to switch VGA/DVI signal.
Press it to open the OSD Menu, to select Menu options when the OSD
Menu is displayed.
Power on or off
Blue and
flicker
LEDOFF
5
EXIT
6
DOWN
7
UP
Volume adjust hot key when OSD is not displayed, used for returning to
former OSD when OSD menu is displayed.
Contrast ratio key when OSD is not displayed, move the selected menu
down when OSD is displayed, decrease the value when enter into the
OSD.
Brightness key when OSD is not displayed, move the selected menu up,
increase the value when enter into the OSD.
2
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menu is displayed.
6. DOWN
˖Contrast ratio key when OSD is not displayed, move the selected menu down when
OSD is displayed, decrease the value when enter into the OSD.
7. UP
˖Brightness key when OSD is not displayed, move the selected menu up, increase the value
when enter into the OSD.
* Press the “MENU” button to start the OSD function.
* Pree”
”or”
”button to select adjusting function
* Press “MENU” button to enter into the function which is going to be adjusted.
* Pree”
”or”
”button to change the present setting value of the function.
* Press “Exit” to leave the OSD menu or return to the former action, and it can store the change points
Attention:
* Press
button to move OSD in a numerical order.
* Press
button to move OSD in a reverse numerical order.ҏ
* Language˖ENGLISHǃFrancaisǃDeutschǃEspanolǃItalianoǃJapaneseǃKoreanǃsimplified
Chinese.
*
Input signal choice: VGA input signal is analogue; DVI input
signal is digital
8
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3.Maintaining Instruments and Test Equipment
Definition: Defect circuit board and the inside signal cable change.
3-1 Instruments
1.Multimet
2.Electric screwdriver
3.
Cross head driver
Hex screw driver
3-2 Test equipment
PC for test
8
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4.Problem analysis
Problem phenomenon
Problem analysis
Maintenance
Test
Light on test
Flickering dot
Display
abnormally
Bright dot
dark dot
back light
light leakage
MURA
inspect the panel
Image
conglutination
replace the panel
Bright spot
Minute granule
Defect dot
Picture retention
Group bright dots
Other
defect
Next stop
surface
NG
Inspec
tion
Accomplish
A
9
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Problem phenomenon
Problem analysis
Maintenance
Test
A
Display
interference
Inspect PCB
Power
display
abnormal
change A/D
board
on
change power
board
change inverter
Flickering
Flickering after
shock
Inspect panel
change panel
No
display
after shock
change AD
board
Waver
Inspect PCB
change power
board
Inspect panel
PANEL
No back light
Next step
B
NG
Inspe
ction
accomplish
10
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Problem phenomenon
Problem analysis
Maintenance
Test
B
change
A/Dboard
Whit screen
display
Inspect PCB
start-up delay
Inspect PCB
change power
board
change inverter
change key
board
brightness
nonuniformity
Inspect PCB
change power
board
change inverter
no back light
when shock
Inspect
PANEL
change panel
No signal
Inspect PCB
change AD
board
Inspect wire
change signal
cable
Inspect panel
change DVI
cable
RGB
display
abnormal
Grey
scale
abnormal
change panel
next step
NG
inspe
ction
C
accomplish
11
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Problem phenomenon
Problem analysis
Maintenance
Test
C
H. line defect
Inspect PCB
change A/D
board
Inspect panel
change panel
Inspect PCB
change A/D
board
V. broken line
H. broken line
V. band
H. band
Power saving
abnormal
change A/D
board
Special smell
Inspect PCB
change power
board
change inverter
next step
NG
inspe
ction
accomplish
12
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Problem phenomenon
Problem analysis
Maintenance
Test
change A/D
board
Power on & off
abnormal
change power
board
No electricity
Power
abnormal
Inspect PCB
off
Inspect PCB
change inverter
change key
board
Inspect wire
change key
board wire
Inspect wire
change power
cord
change AD
board
LED
display
abnormal
LED no light
Inspect PCB
change power
board
change inverter
LEDdark
change key
board
LED abnormal
Inspect wire
change key
board wire
LEDdamage
LEDflickering
next step
NG
inspe
ction
accomplish
13
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8. As following photo shown, take off eight screws used for panel fixation.
9. Hold up panel softly and plug off two lamp wire as photo shown
18
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