Epson Perfection 4490 Photo, Service Manual

Page: 50 / 105

EPSON Perfection 4490 Photo Revision B
Disassembly / Assembly Disassembly Procedure 50
4.2.16 Removing the TPU Carriage Unit
1. Remove the TPU Lower Housing. See Section 4.2.13 on page 47.
2. Remove the torsion springs. See Section 4.2.15 on page 49.
3. Remove the flat washer that secures the Driven Pulley of the TPU CR Motor Assy.
and remove the Driven Pulley and TPU CR Drive Belt in that order.
Figure 4-36. Removing the TPU CR Drive Belt
4. Remove the CN3 Connector from the DRV Board, and remove the two-sided tape
to remove the TPU Carriage Unit.
Figure 4-37. Removing the DRV Inverter FFC
C A U T I O N
When performing the procedure given below, be careful not to lose
the three torsion springs that apply tension to the TPU CR Drive
Belt .
C A U T I O N
When performing the next step, be careful not to lose the flat
washer that secures the Driven Pulley.
TPU CR Motor Assy.
TPU CR Drive Belt
Flat Washer
Drive Pulley
TPU Carriage Unit
„
When installing the DRV Inverter FFC, make sure to align the
positioning lines both on the FFC and the TPU Upper Housing
as shown in
Figure 4-37 before attaching the FFC with the two-
sided tape.
„ See Section 4.2.15 on page 49 for information how to attach the
torsion springs.
CN3
Positioning Lines
DRV Inverter FFC
Tape Position