Troubleshooting - Epson 610 Service Manual

EPSON Perfection 610

3.3 Troubleshooting

This section describes how to troubleshoot problems according to
exhibited phenomenons.
See Table 3-2 that enables you to find the defective part to the unit
level. Then refer to the corresponding table for checkpoints and
solutions.
Table 3-2. Problems and Corresponding Tables to Refer to
Phenomenon
The scanner is turned on but The scanner is not initialized.
does not operate.
"Fatal Error" occurs. The The carriage unit does not
scanner is turned off and back operate.
on but still shows the same
The carriage unit operates but
error.
the error is indicated.
The lamp does not light up.
Image is not read clearly. Image is not read clearly.
"Communication Error" occurs. USB interface error
Communication with the host
is attempted again, but the
same error occurs.
Table 3-3. The scanner is not Initialized.
Cause Step Checkpoints
CN1 on the power Is CN1 on the power
supply board is 1 supply board
disconnected. disconnected?
Troubleshooting
Problem Refer to:
Table 3-3
Table 3-4
Table 3-5
Table 3-6
Table 3-7
Table 3-8
Finding Remedy
Connect CN1 to the
Yes power supply
board.
Troubleshooting
Table 3-4. The carriage unit does not operate.
Cause Step Checkpoints
The PS 1 With scanner power on, check
(Power CN101 for the output voltage at
Supply) the pins below.
board is
• Pins: 8/9 (+) and 6/7 (-)
defective.
• Voltage: +24VDC
The carriage Is grease (G-26) properly
drive applied?
2
mechanism
(See Chapter 6.)
is defective.
3 • With the upper housing
removed, turn the scanner on,
and check that the CR motor is
live.
• Remove the CR motor, and
check that the carriage unit
moves smoothly.
The CR 4 Disconnect CN6 on the main
motor is board. Then, using a tester,
defective. check that the coil resistance at
each point below is 6.2 .
1. Between Pins 2 and 4
2. Between Pins 1 and 3
5 Follow the steps below to check
for the CR motor driver circuit.
1. Set the meter to .
2. Place the (-) terminal of the
tester on Pins 1, 2, 3, and then
4 of the CN6 on the main
board.
3. Place the (+) terminal of the
tester on Pin 6 or 7 of the CN4
on the main board.
4. Turn the scanner off, and
check that the meter shows
" "for each pin.
The main 6 ---
board is
defective.
Revision B
Finding Remedy
No Replace the PS
board.
No Apply grease to
the specified
points properly.
No Check the
carriage unit, and
replace any
defective part or
disassemble and
assemble the
scanner again.
No Replace the CR
motor and go to
step 4.
No Replace the main
board.
--- Replace the main
board.
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