Konica Minolta 5430 DL 5440 DL 5450 - Manual (Page 90)

Main Unit Theory of Operation 2nd Transfer Section
2-53
II Comp
osition
/O
p
eration
9.2.5 2nd transfer voltage fine-adjustment control
• The voltage value established through the ATVC control is fine-adjusted according to the
type of media.
• The following adjustment values are used for labels, coated stock, and recycled paper,
for which no setting values are defined.
9.2.6 2nd Transfer Roller pressure/retraction failure detection control
• The machine monitors the state of the Retraction Position Sensor/2nd Image Transfer
(PC10) for detection of failures.
A. Detection of failure during pressure operation
• If the Retraction Position Sensor/2nd Image Transfer (PC10) is not blocked within a pre-
determined period of time after the 2nd Transfer Roller pressure sequence has been
started, the machine determines that there is a 2nd Transfer Roller pressure/retraction
failure.
• The machine considers that there is a control misfeed if the 2nd Transfer Roller is
retracted when it should be pressed.
B. Detection of failure during retraction operation
• If the Retraction Position Sensor/2nd Image Transfer (PC10) is not unblocked within a
predetermined period of time after the 2nd Transfer Roller pressure sequence has been
started, the machine determines that there is a 2nd Transfer Roller pressure/retraction
failure.
9.2.7 2nd Transfer Roller cleaning control
• DC positive and negative transfer bias voltages are alternately applied to the 2nd Trans-
fer Roller. This allows toner residue on the surface of the 2nd Transfer Roller to be trans-
ferred back to the Transfer Belt, thus cleaning the 2nd Transfer Roller.
• Any voltage for other control purposes is not applied during the cleaning procedure.
• The toner transferred back to the Transfer Belt is collected by the Cleaning Blade.
Type of media Adjustment value
Plain paper, recycled paper Plain paper
OHP film OHP film
Thick stock 1, coated stock Thick stock 1
Thick stock 2 Thick stock 2
Postcards Postcards
Envelopes, labels Envelopes
HV1
4138to2579c0
Transfer Belt
2nd Transfer Roller
Cleaning Blade
5430DL_5440DL_5450_TO_PDF.book 53 ページ ２００５年４月１２日 火曜日 午後４時４９分