Epson Scan 2500 service manual Poor image quality, Scsi Interface Error, Parallel Interface Error

EPSON Stylus Scan 2500 Revision A

Table 3-12. Poor image quality

Cause	Step	Checkpoint	Finding	Solution
Mirror in the		Is the image
		scanned clearly		Clean the lamp
carriage unit is	1		No
		after cleaning the		surface.
dirty.
		mirror?
CCD sensor board	2	---	--	Replace the CCD
is broken.				board.
Control board is	3	---	---	Replace the
broken.				control board.

Table 3-13. SCSI Interface Error

Cause	Step	Checkpoint	Finding	Solution
		Check the user’s
Terminator switch		guide for the		Set the terminator
	1	correct setting. Is	No
is set wrong.				correctly.
		the setting
		correct?
		Check the user’s
SCSI setting is		guide for the		Set the SCSI
	2	correct setting. Is	No
wrong.				correctly.
		the setting
		correct?
		Replace the SCSI
SCSI cable is	3	cable. Is the	Yes	Replace the SCSI
defective.		operation		cable.
		normal?
Control board is	4	---	---	Replace the
broken.				control board.

Table 3-14. Parallel Interface Error

Cause	Step	Checkpoint	Finding	Solution
		On the Windows,
		go to “My
Host and O/S		Computer”→”Pro
		perty”→”Device
(Windows95/98)
	1	Manager”, then,	No	Replace the host.
does not support
		check if
the USB.
		“Universal serial
		bus controller” is
		effective.
		Replace the USB
USB cable is	2	cable. Is the	Yes	Replace the USB
broken.		operation		cable.
		normal?
Control board is	3	---	---	Replace the
broken.				control board.

Table 3-15. Option unit malfunction

Cause	Step	Checkpoint	Finding	Solution
The cable of the		Is the connector
		CN1 on the		Connect the CN1
optional unit is	1		Yes
		control board		properly.
disconnected.
		disconnected?
Control board is	2	---	---	Replace the
broken.				control board.
		+24V line:Lamp,		Replace the
Optional unit is		Motor
	3		---	defective part of
broken.		+5V line:Sensor,
				the optional unit.
		logic circuit.

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