Epson 610 Service Manual page 24

EPSON Perfection 610
Table 3-5. The carriage unit operates but the error is indicated.
Cause Step Checkpoints
The CR home Check the signal levels
1
position sensor between the collector (+)
is defective. and emitter (-) of PC1. The
signal level should change
depending on the condition
below:
• HIGH (4.5V) = Light is
blocked in PC1.
• LOW (0.3V) = Light
passes in PC1.
Table 3-6. The lamp does not light up.
Cause Step Checkpoints
CN5 on the 1 Check that CN5 is
main board is disconnected.
disconnected.
CN1 or CN2 on 2 Check that CN1 or CN2 on
the CCD sensor the CCD sensor board is
board is disconnected.
disconnected.
The connector 3 Check that the connector is
for the lamp is properly connected to the
not properly inverter board.
connected to
the inverter
board.
The lamp is 4 After replacing the lamp,
defective. check that the lamp lights
up.
The inverter 5 After replacing the inverter
board is board, check that the lamp
defective. lights up.
The main board 6 ---
is defective.
Troubleshooting
Finding Remedy
--- Replace the CR
home position
sensor (PC1) on
the main board.
Finding Remedy
Yes Connect CN5 on
the main board
properly.
Yes Connect CN1 or
CN2 on the CCD
sensor board
properly.
No Connect the
connector
properly.
Yes Replace the
lamp.
Yes Replace the
inverter board.
--- Replace the main
board.
Troubleshooting
Table 3-7. Image is not read clearly.
Cause Step Checkpoints
Any mirror in the 1 After cleaning the mirror(s),
carriage unit or check that image is read
the surface of clearly.
the lamp is dirty.
The CCD 2 ---
sensor board is
defective.
The main board 3 ---
is defective.
Table 3-8. USB Interface Error
Cause Step Checkpoints
The host or O/S 1 On the Windows, access
(Windows'98/ My Computer > Property >
NT) does not Device Manager, and
support USB. check that Universal Serial
Bus Controller is effective.
The TWAIN 2 Check that the driver for
driver attached the scanner is installed
for the scanner properly.
is not properly
installed.
The USB cable 3 After replacing the USB
is defective. cable, check that the error
is not indicated.
The main board 4 ---
is defective.
Revision B
Finding Remedy
No Clean the
surface of the
lamp.
--- Replace the CCD
sensor board.
--- Replace the main
board.
Finding Remedy
No Replace the host.
No Instal the correct
driver properly.
No Replace the USB
cable.
--- Replace the main
board.
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