Epson Scan 2500 service manual Scanner does not initialize, Carriage Unit does not operate

EPSON Stylus Scan 2500 Revision A

Table 3-7. Power problems (cont.)

Cause	Step	Checkpoint	Finding	Solution
		With the scanner
		On, check the
		voltage output
The power board.is		level between		Replace the power
	4	pins 8/9(+) and	No
broken.				board.
		pins 6/7(-) on the
		power board. Is
		the voltage
		+5VDC?
Connector CN4 on		Is the connector
		CN4 on the		Connect CN4
the power board is	5		Yes
		control board		properly.
disconnected.
		disconnected?
The control board is	6	---	---	Replace the
broken.				control board.

Table 3-8. Scanner does not initialize

Cause	Step	Checkpoint	Finding	Solution
Connector CN1 on		Is the connector
		CN1 on the power		Connect CN1
the power board is	1		Yes
		board		properly.
disconnected.
		disconnected?

Table 3-9. Carriage Unit does not operate

Cause	Step	Checkpoint	Finding	Solution
		With the scanner power
Power		on, check the voltage
		output level between the		Replace the
board is	1		No
		Pins 4/5(+) and Pins 6/7 (-)		power board.
broken.
		for CN101 on the power
		board. Is it +24VDC?
		• With the scanner upper		Check the
		case removed, does CR		carriage move
Carriage		motor move?		mechanism and
Unit (or CR		• With the CR motor		replace the
move	2	removed, does the	No	corresponding
mechanism)		carriage unit move		parts or
is broken.		smoothly?		disassemble and
				assemble the
				part.

Troubleshooting Scanner Troubleshooting 71