Konica Minolta bizhub 4020 Service Manual page 68

Main drive motor control jam service check
Action
Step 1
1. Remove the main drive gearbox.
2. Check the main drive gearbox cable for proper
connection.
Is it properly connected?
Step 2
1. Remove the main drive gearbox.
2. Check the gears of main drive gearbox for wear or
damage.
Are they free of wear or damage?
Step 3
Check the main drive motor for proper operation:
1. Remove the main drive gearbox.
Note: Do not disconnect the main drive gearbox
cable.
2. POR into the Diagnostics menu and perform a feed
test:
Diagnostics menu >Input Tray Tests >Feed Test >
Select any input source
3. Check if the main drive motor rotates when doing the
feed test.
Does it rotate when doing the feed test?
Step 4
Check the fuser gear for damage or toner contamination.
Is it free of damage and contamination?
bizhub 4020/3320 Service Manual
Yes
Go to step 2.
Go to step 3.
Go to step 4.
Replace the controller
board. See
board
- 67 -
No
Reseat the cable.
Replace the main drive
gearbox. See
gearbox
Replace the main drive
gearbox. See
gearbox
Replace the fuser. See
Controller Fuser
removal.
Main drive
removal.
Main drive
removal.
removal.