Viewsonic VP2290B Schematic
Service Manual
ViewSonic VP2290B
ModelNo.VLCDS24728-1W
Digital LCD Display
(VP2290b-1_SM_705 Rev. 1a Jun 2003)
ViewSonic ® 381 Brea Canyon Road, Walnut, California 91789 USA - (800) 888-8583
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reproduced, transmitted, transcribed, stored in a retrieval system, or translated into any language or
computer language, in any form or by any means, electronic, mechanical, magnetic, optical, chemical,
manual or otherwise, without the prior written permission of ViewSonic Corporation.
Disclaimer
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hereof and specifically disclaims any warranty of merchantability or fitness for any particular purpose.
Further, ViewSonic reserves the right to revise this publication and to make changes from time to time in the
contents hereof without obligation of ViewSonic to notify any person of such revision or changes.
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ViewSonic is a registered trademark of ViewSonic Corporation.
All other trademarks used within this document are the property of their respective owners.
2002 by ViewSonic Corporation. All rights reserved. No part of this publication may be
Revision History
Revision Date Description Of Changes Approval
1
a
6/06/03 Initial Release - DCN3571 J. Wu
Assembly (Dis-Assy) Procedure
VIEWSONIC VP2290b MONITOR
1. Purpose
The purpose of this procedure is to ensure that all Liquid Crystal Display (LCD) repair processes adhere to
the specifications set forth in Incline’s LCD Repair Process Manual, document number 11010.
2. Scope:
This document delineates the generic repair processes for flat panel display. Other processes not
specifically mentioned in this procedure are subject to the processes and methods delineated in the LCD
Repair Process Manual 11010.
3. Responsibility:
It is the responsibility of the Engineering Department to maintain this procedure.
4. Reference Documents:
LCD Test Process 11010
Corrective Action Request (CAR) Form #11192
Incline LCD Traveler Form No. 11043-001
For
5. Tools Required:
Philips screwdriver, #1
Power screwdriver (adjustable torque)
Tweezers
Tube tool (Hose)
Cotton gloves
Protective mylar film ( 12.5 ” wide )
Black ESD carrier ( 18” x 24” )
Foam cushion for carrier (approx. 12” x 20” )
Protective foam for workbench (approx. 12” x 20” )
Large ESD workstation
6. Areas Affected:
Employ this procedure in all operational repair areas of Incline Corporation.
7. Document Retention Period:
Retain this document for 12 months after it has been declared obsolete.
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Assembly (Dis-Assy) Procedure
For
VIEWSONIC VP2290b MONITOR
8. STANDARDS AND PRECAUTIONS
LCD panels are very delicate electronic instruments and need to be handled with great care at all times
during all phases of the repair process. Below is a list of some of the DOs and DON’Ts when handling
LCD panels of any kind.
8.1 ESD
Before opening a LCD assembly, ensure that you are at an ESD compliant workstation with your
ESD wrist strap attached. Wear gloves or finger cots to protect the LCD from fingerprints as
much as possible. Keep the workstation free of debris.
8.2 Contamination/Damage Avoidance
Avoid putting pressure on the plastic film covering the LCD as it can easily be damaged. Never
allow the front or rear Polarizer to come into direct contact with the bench top or granite work area
as this may scratch the Polarizer. Use a clean cloth to protect the surface of the LCD. Ensure that
all screws are immediately placed in a container after removal from the LCD. Care should be
taken with broken glass both for the safety of the operator and the LCD Polarizer. After a LCD
with a broken glass panel or Backlight is discovered and processed, the workspace should be
swept with a rag to remove any small bits of glass.
8.3 Product Tracking
Incline has developed a custom MIS program known as FAST (Facility Automated Serial
Tracking) to track and disposition all products. WIP (Work In Process) stations are located
throughout the facility to allow for convenient access to FAST. Always fill out both the paper
traveler and the WIP screen as accurately as possible. When moving the LCD between locations
update the location on the WIP screen. Throughout this entire procedure, references are made to
the LCD Matrix. The Matrix lists all of the specific tooling and setups required for each LCD.
Key elements of the Matrix are also accessed through the WIP screen.
8.4 Miscellaneous
1. Always use ESD protection devices, such as a grounded workstation and wrist strap, when
handling LCD panels.
2. When handling LCDs where tabs are mounted to PCBs which flex and can potentially make
contact with the polarized panel surfaces (both inside and outside polarizers) ensure that
there is always a protective sheet between the PCB and the polarizer surfaces.
3. Always use an air gun to clear particles from illuminator surfaces. Never use a clean wipe.
Do not touch the illuminator surfaces with your fingers; skin oils leave a mark that is very
difficult to remove without damaging the illuminator.
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Assembly (Dis-Assy) Procedure
For
VIEWSONIC VP2290b MONITOR
9. Procedure: INSTRUCTIONS FOR DIS-ASSEMBLY
1
Situate monitor on workbench in preparation for removal of two (2) rear panels (Item 1)
2
Disengage latch from bottom panel and remove panel to gain access to two (2) cables (Item 2).
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Assembly (Dis-Assy) Procedure
For
VIEWSONIC VP2290b MONITOR
DIS-ASSEMBLY
3
After second panel is removed, use a tube (Item 3) to loosen the four (4) connector mounting screws.
4A 4
Once both cables are removed from the monitor, lay monitor on bench with screen surface down
(protected by foam- Item 4) in preparation for removal of base (Item 4A).
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Assembly (Dis-Assy) Procedure
For
VIEWSONIC VP2290b MONITOR
DIS-ASSEMBLY
5
Remove eight (8) screws (Item 5) that secure monitor base. Lift and remove base from monitor.
6
Using tweezers, remove screw covers (Item 6), a total of four (4), one in each corner. Proceed to
remove four (4) screws.
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