Operation; Transfer Guide Control; Transfer/Separation Control; Transfer Exposure Lamp Control - Konica Minolta BIZHUB 750 Service Manual

10. TRANSFER/SEPARATION SECTION

10.3 Operation

10.3.1

Transfer guide control

A. Purpose
To prevent the transfer guide from getting soiled, a minus (-) DC voltage is impressed from the high voltage unit
(HV).
Impressed voltage: -500 V
B. Timing
The impression of voltage onto the transfer guide plate is turned ON a specified period of time after a start signal
is sent, and it is turned OFF a specified period of time after the trailing edge of the last paper is detected by the
paper leading edge sensor (PS43).
10.3.2

Transfer/separation control

A. Transfer
The high voltage unit (HV) pressurizes 24V DC to impress a plus (+) DC voltage onto the transfer wire for dis-
charge.
Transfer DC output range: 50
B. Separation
For separation, an AC high voltage and a minus (-) DC voltage are used. The high voltage unit (HV) impresses 2
separation wires for discharge.
Separation AC output range: 4 kV to 5.7 kV
Separation DC output range: 0
10.3.3

Transfer exposure lamp control

A. Purpose
The transfer exposure lamp (TSL) is turned on to secure the transferability and to prevent the reverse charge to
the drum.
B. Timing
The transfer exposure lamp turns ON a specified period of time after the paper leading edge sensor (PS43) in
the registration section turns ON, and it turns OFF a specified period of time after PS43 detect the trailing edge
of the paper.
30
µ µ
A to 600 A
µ µ
A to -400 A
Theory of Operation Ver1.0 Aug.2005