Epson RS-353, Service Manual

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3.1
Disassembly and Assembly Procedures
This section explains how to disassemble the LCP. The reassembly procedure is the
exact reverse of the disassembly procedure.
(1) Preparatory Procedure
1) Remove any ring, wrist watch, cuff buttons, or other metal accessories that are likely
to get in contact with the equipment.
2) Wear gloves.
3) Wear a wrist band and ground it.
Place a ground mat.
4) Turn off the main unit and the host computer.
5) Unplug the power cord from the main unit and service outlet.
6) Disconnect the interface cable from the main unit.
7) Clean the air filter, interface and case cover with a vacuum cleaner.
(2) Required tools and accessories
Prepare the tools and accessories listed in the table below.
Table 3-1
(3) Precautions
Precautions given to the individual assembly and’disassembly procedures. Read
them carefully before starting the assembly or disassembly procedure. A set of
general precautions are given below.
As you disassemble the main unit of the LCP, dust that is to the internal fans
and air filters is likely to migrate and contaminate the light bulbs G, and B which
are the heart of the display mechanism, thus deteriorating the display quality.
Accordingly, before reassembling the LCP, check the light bulbs for dust and, if
necessary, clean them with a vacuum cleaner.
The light bulbs R, G, and B and circuit board assemblies are highly sensitive to static
electricity.
When you remove a light bulb block, place it in an antistatic bag
immediately.
When you perform the assembly or disassembly operations listed below, check the
pertinent unit and its peripheral lens and glass surfaces for any dirt before reinstalling
them. If the unit is found dirty, clean it with isopropyl alcohol.
1. Disassembling the light guide unit
2. Removing the prism unit
3-1