Epson Perfection 1250 Service Manual page 25

Epson perfection 1250 flatbed scanner
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EPSON Perfection 1250/1250 PHOTO
SCANNER DOESN'T INITIALIZE
When the scanner is powered up and connected to a computer with the driver
installed, the Operate light (LED) should come on, the carriage should move
briefly to the right and then return to home position. If you don't see this, check
the following:
1. Make sure all connectors, especially on the power supply board, are
secure.
2. If all connectors are secure, go to the following section.
CARRIAGE DOESN'T MOVE
If the carriage does not move at all when connected to a computer with the
driver installed, check the following:
1. Make sure that CN4 is connected to the main board.
2. With software installed and after starting a scan, check that the carriage
slides smoothly. If it catches or fails to move smoothly, replace it.
3. Check the carriage motor for a possible short circuit or open in one of its
coils. Disconnect CN5 and check resistance:
"
between pins 1 and 3: 18.4 ohms
"
between pins 2 and 4: 18.4 ohms
Replace the motor if defective.
4. If you can't find any other problems, replace the main board.
CARRIAGE OPERATES BUT AN ERROR OCCURS
If the carriage operates but the scanner detects an error:
1. If the upper case has been removed, reinstall it.
2. If the error still occurs, replace the main board.
LAMP DOES NOT COME ON
If the fluorescent lamp doesn't come on, check the following:
1. Check all connections to make sure they're secure.
2. The lamp or inverter board may be worn out. Replace the CR assembly.
3. If the lamp still doesn't come on, replace the main board.
IMAGE ISN'T SCANNED CLEARLY
If the image appears blurry, out of focus, or has other problems, check the
following:
1. Check the document glass. Clean it if necessary with a soft, dry cloth. You
can also use a neutral cleaning agent, then wipe it dry.
2. Check the lamp; it may be dirty or darkened in some areas. Clean or
replace as needed.
3. Check the mirror in the carriage unit; clean it if needed.
4. If the scanner's parts are clean and you still don't get a good image,
replace the main board and retest.
5. After eliminating all other possibilities, there may be an optical problem in
the carriage, mirror unit, or CCD sensor unit. In that case, replace the
entire scanner mechanism.
Troubleshooting
25

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