Adf Feed Errors Service Check - Konica Minolta bizhub 4020 Service Manual

4.8.14 ADF feed errors service check

Actions
Step 1
If the ADF is multi-feeding, check for dirt on the ADF separator
pad and ADF separator rollers.
Are they dirty?
Step 2
If the paper is skewing when it is fed into the ADF, check the
paper guide width.
Is it set correctly?
Step 3
If paper is skewing when fed or jamming check to see if the top
cover is open or ajar.
Is the ADF top cover open or ajar?
Step 4
Is the leading edge of the paper wrinkled or torn?
Step 5
Perform the ADF pick motor and ADF feed motor tests.
Are the motors working properly?
Step 6
Perform the ADF paper present sensor test. See
Is the sensor working properly?
Step 7
Check the ADF sensor actuators to see if they are dirty or
jammed.
Are the actuators ok?
Step 8
Properly connect all the connections in the ADF relay board and
controller board.
Did this fix the situation?
Step 9
Check the ADF cable for continuity.
Is there continuity?
bizhub 4020/3320 Service Manual
Scanner tests.
- 167 -
Yes No
Clean them with a lint Replace the
free cloth and separator pad and
isopropyl alcohol. restraint pad.
Go to step 3. Set the paper guides
so they contact the
edges of the paper.
Properly close the top Go to step 4. If the
cover. paper is jamming in
the ADF, then go to
ADF paper jam
service
Use different media. Go to step 5.
Go to step 6. Go to step 8.
Go to step 7. Go to step 8.
If any actuators on Go to step 8.
the ADF are broken,
then replace the ADF
unit. See ADF unit
removal.
Problem resolved Go to step 9.
Go to step 11. Go to step 10.
check.