Fuser Service Check - Konica Minolta bizhub 4020 Service Manual

Fuser service check

Action
Step 1
1. Restore the engine settings to their defaults:
Diagnostics Menu >Printer Setup >Defaults
2. Restore the EP setup settings to their defaults:
Diagnostics Menu >EP Setup >Defaults
Does the problem remain?
Step 2

Check the fuser cables JTHERM1 and JEXIT for
proper connection to the controller board.

Check the cable PCN5 for proper connection to the
power supply.
Are they properly connected?
Step 3
Are the cables JTHERM1, JEXIT and PCN5 free of
damage?
Step 4
1. Turn off the printer.
2. Remove the rear door and cover.
3. Disconnect the fuser cable connected to PCN5 of the
power supply.
4. Check for approximate correct resistance on the fuser
cable:
- 220V fuser—43 ohms
- 110V fuser—10 ohms
- 100V fuser—8 ohms
Is the resistance equal to any of the above values?
Step 5
Check the fuser rollers, belts and gears for damage and
debris.
Are they free of damage and debris?
bizhub 4020/3320 Service Manual
Yes
Go to step 2.
Go to step 3.
Go to step 4.
Perform an LVPS service
check. See
check.
Perform a cooling fan
service check and LVPS
service check. See
Cooling fan service
check
check.
- 121 -
No
The problem is solved.
Reseat the cables.
Replace the fuser. See
Fuser
Replace the fuser. See
LVPS service Fuser
Replace the fuser. See
Fuser
and LVPS service
removal.
removal.
removal.