Epson STYLUS Scan 2500 Service Manual page 71

EPSON Stylus Scan 2500
Table 3-7. Power problems (cont.)
Cause Step
With the scanner
On, check the
voltage output
level between
The power board.is
4 pins 8/9(+) and
broken.
pins 6/7(-) on the
power board. Is
the voltage
+5VDC?
Is the connector
Connector CN4 on
CN4 on the
the power board is 5
control board
disconnected.
disconnected?
The control board is
6
broken.
Table 3-8. Scanner does not initialize
Cause Step
Is the connector
Connector CN1 on
CN1 on the power
the power board is 1
board
disconnected.
disconnected?
Troubleshooting
Checkpoint Finding Solution
Replace the power
No
board.
Connect CN4
Yes
properly.
Replace the
--- ---
control board.
Checkpoint Finding Solution
Connect CN1
Yes
properly.
Cause
Power
board is
broken.
Carriage
Unit (or CR
move
mechanism)
is broken.
Scanner Troubleshooting
Table 3-9. Carriage Unit does not operate
Step Checkpoint
With the scanner power
on, check the voltage
output level between the
1
Pins 4/5(+) and Pins 6/7 (-)
for CN101 on the power
board. Is it +24VDC?
• With the scanner upper
case removed, does CR
motor move?
• With the CR motor
2 removed, does the
carriage unit move
smoothly?
Revision A
Finding Solution
Replace the
No
power board.
Check the
carriage move
mechanism and
replace the
No corresponding
parts or
disassemble and
assemble the
part.
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