Epson Perfection 4870 Photo Service Manual page 32

Perfection 4870 Photo
Start
Are all connectors
normal?
Has the fuse
of the power
supply blown
out?
Can the CR Motor
operate normally?
Do the lamps
light up?
Replace the Main
Board.
Figure 3-1. The Main Unit does not perform initialization operation.
TROUBLESHOOTING
Reexamine the
connection.
Replace the Power
Supply Board.
Replace the CR
Motor.
Replace the Power
Supply Board.
Troubleshooting
Start
Has the
Release the
Carriage Lock been
Carriage Lock.
released?
Is the Housing
Install it normally.
Upper installed
correctly?
Is the
Connector CN6
Connect the
on the Main
Connector.
Board
connected?
Is the Carriage
Can the CR Motor
Moving Mechanism
operate normally?
without problem?
Replace the Main Re-disassemble and
Board. re-assemble.
Figure 3-2. The Carriage Unit does not operate.
Revision A
Replace the CR
Motor.
Replace the
corresponding part.
32