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CAUTION:
Before servicing this chassis, it is important that the service technician read the "Safety
Precautions" and "Product Safety Notices" in this service manual.
ATTENTION:
Avant d'effectuer l'entretien du châassis, le technicien doit lire les «Précautions de sécurité»
et les «Notices de sécurité du produit» présentés dans le présent manuel.
VORSICHT:
Vor Öffnen des Gehäuses hat der Service-Ingenieur die ,,Sicherheitshinweise" und ,,Hinweise
zur Produktsicherheit" in diesem Wartungshandbuch zu lesen.
SERVICE MANUAL
Data
contained
within
this
Service
manual is subject to alteration for
improvement.
Les données fournies dans le présent
manuel d'entretien peuvent faire l'objet
de modifications en vue de perfectionner
le produit.
Die
in
diesem
Wartungshandbuch
enthaltenen Spezifikationen können sich
zwecks Verbesserungen ändern.
October 2001
TFT LCD DISPLAY PANEL
No. 0413
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT
CML181SXW


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1. ELECTRICAL REQUIREMENTS........................................................................5
A. LCD Panel Specification.......................................................................................................... 5
B. CONTROLS ............................................................................................................................ 6
C. Power Management ................................................................................................................ 6
D. Display Modes FOR Inspections............................................................................................. 8
2. VL-706 DISPLAY CONTROL BOARD ...............................................................9
A. Description .............................................................................................................................. 9
B. Features .................................................................................................................................. 9
C. BLOCK DIAGRAM .................................................................................................................. 9
D. Connector Locations ............................................................................................................... 10
E. Connector Type....................................................................................................................... 10
F. Connector pin assignment....................................................................................................... 10
3. VC-702 LVDS SIGNAL TRANSFER BOARD.....................................................13
A. Description .............................................................................................................................. 13
B. Connector Locations ............................................................................................................... 13
C. Connector Type....................................................................................................................... 13
D. Connector pin assignment ...................................................................................................... 13
4. VK-517 CONTROL PANEL AND AUDIO BOARD .............................................14
A.Description ............................................................................................................................... 14
B.Connector and Switch Locations.............................................................................................. 14
C.Connector type ......................................................................................................................... 14
D.Connector pin Assignment ....................................................................................................... 14
5. VM-517 POWER AND AUDIO............................................................................17
A. Major Specification .................................................................................................................. 17
B. Description .............................................................................................................................. 17
C. Efficiency:................................................................................................................................ 17
D. Connector Locations ............................................................................................................... 17
E. Connector type ........................................................................................................................ 17
F. Connector pin Assignment ...................................................................................................... 18
6. AC ADAPTER (LSL9901B12320) ......................................................................19


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A. Quick specification review......................................................................................................... 19
7. CIRCUIT DESCRPTION .....................................................................................19
A. Display-Controller .................................................................................................................... 19
B. Circuit of Plug and Play ........................................................................................................... 19
C. System Clock .......................................................................................................................... 19
D. Power Regulator ..................................................................................................................... 19
8. INTRODUCTION.................................................................................................20
A. Front Panel Control and Led ................................................................................................... 20
B. Rear Panel connector Input Signals........................................................................................ 21
9. TROUBLESHOOTING........................................................................................22
A. Main Procedure ....................................................................................................................... 22
B. Power Circuit Troubleshooting ................................................................................................ 23
C. Backlights Troubleshooting ..................................................................................................... 24
D. Performance Troubleshooting................................................................................................. 25
E. Function Troubleshooting........................................................................................................ 26
APPENDIX A: DISPLAY UNIT ASSEMBLY ..........................................................27
APPENDIX B: PCB ASSEMBLY ...........................................................................30


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WARNING
1) Critical Components are marked with the symbol of
# in the material list. For continued
protection against Low Radiation, replace only with same part number.
2)
This symbol warns the personnel that un-insulated voltage within the unit may have sufficient
magnitude to cause electric shock.
Therefore, it should be read carefully in order to avoid any problems.


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1
1. ELECTRICAL REQUIREMENTS
A. LCD Panel Specification
Display:
18.1 inch (18.1" viewable image size): active matrix: thin film
transistor (TFT): liquid crystal display (LCD): 0.2805 mm dot
pitch: R.G.B. Vertical stripe 200 cd//m
2 white luminance,
typical: 200:1 contrast ratio, Min.
Compatibility:
640 x 350: VGA-350
720 x 400: VGA text
640 x 400: VGA-GRAPH
640 x 480: VGA, 60Hz to 75 Hz vertical refresh rate
800 x 600: 56Hz to 75 Hz vertical refresh rate
1024 x 768 non-interlaced: 60Hz to 75 Hz vertical refresh rate
1280 x 1024 non-interlaced: 60Hz to 75 Hz vertical refresh
rate
Synchronization
Frequencies:
Horizontal:
24 kHz to 80 kHz
Vertical:
56 Hz to 75 Hz
Pixel Frequency: 25 Mhz 135 Mhz
Resolution:
Horizontal:
1280 dots
Vertical:
1024 lines
Active
Display
Area:
Horizontal:
359.0 mm
Vertical:
287.2 mm
Viewing Angles:
Up 80deg down 80deg (TYP)
Left 80deg, Right 80deg (TYP)
CR
10
Display Colors:
16,777,216 (with FRC)
Power Supply:
AC 100 to 240V worldwide input, 50 / 60Hz
Power
Consumption:
Typical:50W on mode +10 / -25%
Environmental:
Operating temperature: 0ºC to 50ºC
Storage temperature: -20ºC to 65ºC
Relative Humidity: 20%~80%