Drive; Operation; Transfer Voltage Output Control; Transfer Roller Cleaning Control - Konica Minolta bizhub 164 Service Manual

Theory of Operation Ver. 1.1 Apr. 2010

14.2 Drive

14.3 Operation

14.3.1

Transfer voltage output control

• A positive charge is applied to the image transfer roller to transfer the toner image formed
on the surface of the drum onto the paper.
• The charge applied to the image transfer roller is varied according to the following condi-
tions to ensure that image transfer efficiency is stabilized.
1. Paper width: The smaller the paper width, the greater the amount of charge.
2. B/W ratio of image: The higher the coverage, the greater the amount of charge.
14.3.2

Transfer roller cleaning control

• DC positive and negative transfer bias voltages are alternately applied to the transfer
roller. This allows toner residue on the surface of the transfer roller to be transferred back
to the drum, thus cleaning the transfer roller.
• The toner transferred back to the transfer belt is collected by the cleaning blade.
A. Operation timing
• The cleaning is performed during a warm-up cycle after the front or right door is opened
and closed.
Drum
Transfer roller
14. TRANSFER/SEPARATION SECTION
Main motor (M1)
A0XXT2C520AA
33