Konica Minolta bizhub 40p, Service Manual

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Field Service V er. 1.0 Dec. 2007 15. Image quality problems
165
bizhub 40P
T
roubleshooting
15. Image quality problems
15.1 How to identify problematic part
• Let the machine produce a test print and determine whether the image problem is attrib-
utale to the engine or controller system.
See P.146
15.2 Solution
15.2.1 Blank or black prints
A. Typical faulty images
B. Troubleshooting procedure
A02EF4C518DA
Step Section Check item Result Action
1 Print unit Is a printed page blank? YES
Check the PH Unit connectors for
proper connection.
2
Toner cartridge
Is the coupling of the drive mech-
anism of the toner cartridge prop-
erly connected?
NO
Check the coupling of the drive
mechanism for connection and
correct it as necessary, or replace
the toner cartridge.
3
Is the drum charge voltage con-
tact point or PC drum ground con-
tact point of the toner cartridge
properly connected?
NO
Check, clean, or correct the
contact point.
4
Print control
board
Is the print control board (PRCB)
connector connected properly?
NO Connect it properly.
5
⎯
Was the problem eliminated when
step 4 was checked?
NO
Replace the print control board
(PRCB).
Replace the MFP board (MFPB).
Replace the PH unit.