Konica Minolta bizhub 20 User Manual page 130

Examples of poor print
quality
ABCDEFGH CDEF
abcdefghijk defg
A B C D B C
a b c d e b c d
0 1 2 3 4 2 3
Faint
ABCDEFGH
abcdefghijk
A B C D
a b c d e
0 1 2 3 4
Toner specks
All black
Recommendation
'
 Check the machine s environment. Conditions such as humidity, high
temperatures, and so on, may cause this print fault. (See Choosing a
location on page 92.)
 If the whole page is too light, Toner Save mode may be on. Turn off
Toner Save mode in the machine menu settings or Toner Save
mode in the printer Properties of the driver. (See Toner Save
on page 24 or Advanced tab in the Software User's Guide on the
CD/DVD-ROM.)
 Clean the scanner window and the corona wire of the drum unit. (See
Cleaning the laser scanner window on page 138 and Cleaning the
corona wire on page 140.)
 The toner cartridge may be damaged. Put in a new toner cartridge.
(See Replacing a toner cartridge on page 143.)
 The drum unit may be damaged. Put in a new drum unit. (See
Replacing the drum unit on page 145.)
 Make sure that you use paper that meets our specifications. Rough-
surfaced paper may cause the problem. (See Acceptable paper and
other print media on page 12.)
 Clean the corona wire and the drum unit. (See Cleaning the corona
wire on page 140.)
 The drum unit may be damaged. Put in a new drum unit. (See
Replacing the drum unit on page 145.)
 The fuser unit may be contaminated. Call your KONICA MINOLTA
dealer for service.
 Clean the corona wire inside the drum unit by sliding the blue tab. Be
sure to return the blue tab to the home position (
corona wire on page 140.)
 The drum unit may be damaged. Put in a new drum unit. (See
Replacing the drum unit on page 145.)
 The fuser unit may be contaminated. Call your KONICA MINOLTA
dealer for service.
Troubleshooting and routine maintenance
a
). (See Cleaning the
121
C