Epson STYLUS Scan 2500 Service Manual page 73

EPSON Stylus Scan 2500
Table 3-12. Poor image quality
Cause Step
Is the image
Mirror in the
scanned clearly
carriage unit is 1
after cleaning the
dirty.
mirror?
CCD sensor board
2
is broken.
Control board is
3
broken.
Table 3-13. SCSI Interface Error
Cause Step
Check the user's
guide for the
Terminator switch
1 correct setting. Is
is set wrong.
the setting
correct?
Check the user's
guide for the
SCSI setting is
2 correct setting. Is
wrong.
the setting
correct?
Replace the SCSI
SCSI cable is cable. Is the
3
defective. operation
normal?
Control board is
4
broken.
Troubleshooting
Checkpoint Finding Solution
Clean the lamp
No
surface.
Replace the CCD
--- --
board.
Replace the
--- ---
control board.
Checkpoint Finding Solution
Set the terminator
No
correctly.
Set the SCSI
No
correctly.
Replace the SCSI
Yes
cable.
Replace the
--- ---
control board.
Cause
Host and O/S
(Windows95/98)
does not support
the USB.
USB cable is
broken.
Control board is
broken.
Cause
The cable of the
optional unit is
disconnected.
Control board is
broken.
Optional unit is
broken.
Scanner Troubleshooting
Table 3-14. Parallel Interface Error
Step Checkpoint Finding
On the Windows,
go to "My
Computer" "Pro
perty" "Device
1 Manager", then,
check if
"Universal serial
bus controller" is
effective.
Replace the USB
cable. Is the
2
operation
normal?
3 ---
Table 3-15. Option unit malfunction
Step Checkpoint Finding
Is the connector
CN1 on the
1
control board
disconnected?
2 ---
+24V line:Lamp,
Motor
3
+5V line:Sensor,
logic circuit.
Revision A
Solution
No Replace the host.
Replace the USB
Yes
cable.
Replace the
---
control board.
Solution
Connect the CN1
Yes
properly.
Replace the
---
control board.
Replace the
--- defective part of
the optional unit.
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