Epson Perfection 4490 Photo, Service Manual

Page: 30 / 105

EPSON Perfection 4490 Photo Revision B
Disassembly / Assembly Overview 30
4.1 Overview
This chapter explains the procedures for disassembling the major units and parts of the
product. Unless otherwise explained, reassembly should be carried out in the reverse
order of the disassembly procedure. When you have to remove any parts or
components that are not described in this chapter, refer to the exploded diagram in the
Appendix.
Before starting disassembly, always read the precautions described in the next section.
4.1.1 Precautions
Before starting the disassembly or reassembly of the product, read the following
precautions given under the headings WARNING and CAUTION.
4.1.2 Recommended Tools
To protect this product from damage, use the tools indicated in the following table.
4.1.3 Recommended Screws
The following table indicates the screws used in the EPSON Perfection 4490 Photo
Scanner.
W A R N I N G
„ Before disassembling or reassembling this product, always
disconnect the Power Cable and Interface Cable. When you
have to work with power on for voltage measurement, etc., use
extreme care not to get an electric shock and do the work in
accordance with the procedures given in this manual.
„ To prevent your hands from being cut by sharp edges, always
wear gloves before starting disassembly or reassembly.
C A U T I O N
„ When touching any internal components, use static electricity
discharge equipment such as anti-static wrist straps.
„ Provide sufficient work space for disassembling and
reassembling.
„ Always use only the recommended tools for disassembly,
reassembly and adjustment.
„ Be sure to tighten the screws to the specified torque.
„ Use the specified grease for lubrication. Refer to Chapter 6 for
details.
„ Since a prototype was used to illustrate these disassembly and
assembly procedures, the appearance of some parts may differ
from those on an actual product. The procedures themselves,
however, are accurate for the retail model.
„ When using compressed air products; such as air duster, for
cleaning during repair and maintenance, the use of such
products containing flammable gas is prohibited.
Table 4-1. Specified Tools
Name Epson Part Number
Phillips screwdriver, No. 2 1080532
Flat-blade screwdriver 1080527
Tweezers 1080561
Long-nose pliers 1080561
Table 4-2. Recommended Screws
No. Name Type
1 C.B.P. 3 x 6 Phillips Bind P-tite Screw, size M3, 8 mm length
2 C.B.P. 3 x 8 Phillips Bind P-tite Screw, size M3, 8 mm length
3 C.B.P. 3 x 12 Phillips Bind P-tite Screw, size M3, 8 mm length
4 C.P. 3 x 8 Phillips Pan Head Screw, size M3, 4 mm length
5 C.B. 3 x 3 Phillips Bind Screw, size M3, 3 mm length
6 C.B.P. 4 x 12 Phillips Bind P-tite Screw, size M3, 8 mm length
7 C.B.S. 3 x 5 Phillips Bind S-tite Screw, size M3, 5 mm length
8 C.P.F.P. 3 x 8 Phillips Pan Flange Head P-tite Screw, size M3, 8 mm length