Service manual

EPSON Stylus Photo R280/R285/R290 Revision B
Chapter 4 Disassembly/Assembly 4.3.1 Main Board Unit (Removing Control Boards) 63
! Disassembling the Main Board Unit
1. Remove the Main Board Unit
(p.61).
2. Remove the seven screws and remove the Upper Shield Plate M/B.
Screw (6 pcs.): C.B.S. M3x6 (tightening torque: 5-7 kgf.cm) (No.1)
Screw (1 pc.): C.P. M3x6 (tightening torque: 4-6 kgf.cm) (No.7)
(The numbers shown in the figure indicate the order of tightening the screws.)
Figure 4-21. Removing the Upper Shield Plate M/B
3. Remove the two screws and remove the Shield Plate M/B Sub.
Screw (2 pcs.): C.B.S. M3x6 (tightening torque: 4-6 kgf.cm) (No.1)
(The numbers shown in the figure indicate the order of tightening the screws.)
4. Remove the screw and remove the Main Board Unit.
Screw C.B.S. M3x10 (tightening torque: 4-6 kgf.cm) (No.2)
Figure 4-22. Removing the Main Board
C A U T I O N
! Do not apply unnecessary force on the screw receiving parts of
the Lower Shield Plate M/B, as they are easy to deform.
! When assembling or disassembling the Upper Shield Plate M/B,
be careful of its sharp edges.
Screw Receiving Part
3
Upper Shield Plate
M/B
2
5
1
6
4
7
Lower Shield Plate
M/B
Screw Receiving Part
C A U T I O N
Be careful of the sharp edges shown in the figure below when
assembling or reassembling.
! When installing the Main Board, match the positioning hole
with the guide pin shown in Fig.4-22.
! Tighten the screws in the order given in Fig.4-21 (p.63),
Fig.4-22.
[Rear Side]
1
2
Shield Plate
M/B Sub
Upper Side: Main Board
Lower Side: Lower Shield Plate M/B
Sharp edge
Positioning Hole and
Guide Pin