Epson 1240U - Page 24

EPSON Perfection 1240U Revision A
Troubleshooting Troubleshooting 24
Table 3-6. The lamp does not light up.
Cause Step Checkpoints Finding Remedy
CN1 on the
main board is
disconnected.
1 Check that CN1 is
disconnected.
Yes Connect CN1 on
the main board
properly.
CN1 or CN2 on
the CCD sensor
board is
disconnected.
2 Check that CN1 or CN2 on
the CCD sensor board is
disconnected.
Yes Connect CN1 or
CN2 on the CCD
sensor board
properly.
The connector
for the lamp is
not properly
connected to
the inverter
board.
3 Check that the connector is
properly connected to the
inverter board.
No Connect the
connector
properly.
The lamp is
defective.
4 After replacing the lamp,
check that the lamp lights
up.
Yes Replace the
lamp.
The inverter
board is
defective.
5 After replacing the inverter
board, check that the lamp
lights up.
Yes Replace the
inverter board.
The main board
is defective.
6 --- --- Replace the main
board.
Table 3-7. Image is not read clearly.
Cause Step Checkpoints Finding Remedy
Any mirror in the
carriage unit or
the surface of
the lamp is dirty.
1 After cleaning the mirror(s),
check that image is read
clearly.
No Clean the
surface of the
lamp.
The CCD
sensor board is
defective.
2 --- --- Replace the
carriage unit.
The main board
is defective.
3 --- --- Replace the main
board.
Table 3-8. USB Interface Error
Cause Step Checkpoints Finding Remedy
The host does
not support
USB.
1 On the Windows, access
My Computer > Property >
Device Manager, and
check that Universal Serial
Bus Controller is effective.
No Replace the host.
The TWAIN
driver attached
for the scanner
is not properly
installed.
2 Check that the driver for
the scanner is installed
properly.
No Instal the correct
driver properly.
The USB cable
is defective.
3 After replacing the USB
cable, check that the error
is not indicated.
No Replace the USB
cable.
The main board
is defective.
4 --- --- Replace the main
board.
Table 3-9. Option TPU does not operate
Cause Step Checkpoint Finding Solution
The cable of the
optional unit is
disconnected.
1 Is the connector
CN6 on the control
board
disconnected?
Yes Connect the CN6
properly.
Main board is
broken.
2 --- --- Replace the main
board.
Optional unit is
broken.
3 +24V line:Lamp,
Motor
+5V line: Sensor,
logic circuit.
--- Replace the
defective part of the
optional unit.