5-1-3. Effects of Line Problems on Copy Quality
Missing lines; shrinkage in the sub scan direction
- Original -
- Bad Copy Sample -
Cut off
- Bad Copy Sample -
Some lines may be missing
just before the cut off.
5-2. MACHINE OPERATION
Use the following procedures while referring to the point-to-point diagram and signal tables. The procedures may
not be exhaustive, but they may help you to solve the problem.
5-2-1. Scanner/Document Feeder
1. Non-feed
Test
Action if Yes
Action if No
1. Is the scanner cover closed properly?
2. Was the document placed in the feeder correctly?
Was the document of a recommended type?
3. Is the document fed into scanner after you place it
in the ADF ?
Finished.
Go to test 4.
4. Does the document sensor actuator move correctly. Go to test 5.
Reassemble or replace the
actuator. Go back to test 3.
5. Do the two red LEDs on the left hand side of the
LED array light correctly, without a document in the
feeder ?
Go to step 8.
Go to step 6.
6. Check the +5V output from the FDU.
Is the output correct ?
Replace the LED array,
then go back to test 3
Go to step 7.
7. Does the PSU 24V?
Check the PSU-FDU
connection or replace the
FDU.
If the wall socket is good,
replace the PSU.
5-2
