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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.
DECEMBER 2001
TFT MONITOR
No. .0412
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT
CML153XW


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1. ELECTRICAL REQUIREMENTS .............................................1
A. LCD Panel Specification................................................................................. 1
B. Controls.......................................................................................................... 2
C. Power Management ....................................................................................... 2
D. Display Modes for Inspections........................................................................ 4
2. ADJUSTMENT CONDITIONS..................................................5
A. Measuring Apparatuses Used ........................................................................ 5
B. Input Signal .................................................................................................... 5
C. Indication........................................................................................................ 5
3. ADJUSTMENT OF POWER SUPPLY .....................................6
A. Adjustment of Switching Regulator................................................................. 6
4. ADJUSTMENT OF BOARDS...................................................6
A. Connection Method ........................................................................................ 6
5. VL-531 DISPLAY CONTROL BOARD.....................................7
A. Description ..................................................................................................... 7
B. Features......................................................................................................... 7
C. Block Diagram (Control CKT)......................................................................... 7
D. Connector Locations ...................................................................................... 8
E. Connector Type.............................................................................................. 8
F. Connector Pin Assignment ............................................................................. 8
6. VK-526 CONTROL PANEL AND AUDIO BOARD...................13
A. Description ..................................................................................................... 13
B. Electrical characteristics................................................................................. 13
C. Connector and Switch Locations .................................................................... 13
D. Connector Type ............................................................................................. 13
E. Connector Pin Assignment ............................................................................. 14
7. VP-531 POWER BOARD.........................................................16
A. Description ..................................................................................................... 16
B. Electrical characteristics................................................................................. 16
C. Connector locations ....................................................................................... 17
8. CIRCUIT DESCRIPTION .........................................................19
A. Micro-Controller Circuit................................................................................... 19
B. Circuit of Plug and Play .................................................................................. 19
C. System Clock ................................................................................................. 19
D. Image Engine ( Zoom) ................................................................................... 19


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E. Power Regulator............................................................................................. 19
9. INTRODUCTION......................................................................20
A. Front Panel Control and Led .......................................................................... 20
B. Rear Panel connector Input Signals ............................................................... 21
10. TROUBLESHOOTING...........................................................22
A. Main Procedure .............................................................................................. 22
APPENDIX A: DISPLAY UNIT ASSEMBLY ...............................27
APPENDIX B: PCB ASSEMBLY ................................................29


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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:
15 inch (15" viewable image size): active matrix: thin film transistor
(TFT): liquid crystal display (LCD): 0.297 mm dot pitch: R.G.B.
Vertical stripe 200 cd//m2 white luminance, typical: 300:1 contrast
ratio, typical
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
Synchronization
Frequencies:
Horizontal:
24 kHz to 60 kHz
Vertical:
56 Hz to 75 Hz (1024 x 768 is up to 75 Hz)
Pixel Frequency: 21 Mhz to 78 Mhz
Resolution:
Horizontal:
1024 dots
Vertical:
768 lines
Active Display Area:
Horizontal:
304.1 mm
Vertical:
228.1 mm
Viewing Angles:
Up 40deg down 45deg (TYP)
Left 60deg, Right 60deg (TYP)
CR > 10
Display Colors:
6-bits driver
Power Supply:
AC 100 to 240V worldwide input, 50 / 60Hz
Power
Consumption:
Typical: 25W on mode +10 / -25%
Environmental:
Operating temperature: 0ºC to 40ºC
Storage temperature: -20ºC to 65ºC
Storage humidity: 10%~90%