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.
Page 3
ViewSonic Corporation
Confidential
– Do Not Copy