Epson L800 - Page 30

L800/L801 Revision A
Disassembly/Reassembly Main Board Unit 29
Confidential
 Disassembling the Main Board Unit
1. Remove the Main Board Unit
(p.27).
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)
• Screw (1 pc.): C.P. M3x6 (tightening torque: 4-6 kgf.cm)
(The numbers shown in the figure indicate the order of tightening the screws.)
Figure 1-27. 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)
(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)
Figure 1-28. 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.1-28.
 Tighten the screws in the order given in
Fig.1-27 (p.29),
Fig.1-28.
[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