Konica Minolta 5430 DL 5440 DL 5450 - Manual (Page 89)

2nd Transfer Section Main Unit Theory of Operation
2-52
II Comp
osition
/O
p
eration
9.2.4 2nd transfer voltage setting control (ATVC: Auto Transfer Voltage Control)
• The transfer voltage (T2) is corrected to reduce effect from the Transfer Belt and environ-
mental changes of toner.
A. Overview of 2nd transfer ATVC operation
B. 2nd transfer ATVC operation timing
• The ATVC control operation is performed for every period of time equivalent to a prede-
termined number of printed pages produced.
• The control operation is performed when the Intermediate Transfer Belt Unit is replaced
with a new one (as started when the Transfer Belt time counter is reset).
• Execution of the transfer ATVC control is, as a rule, synchronized with the image stabili-
zation control. The image stabilization sequence is carried out after the execution of the
ATVC control.
☞ 2-118
C. 2nd transfer ATVC operation
1.
The Transfer Belt is driven as in the monochrome mode (but charging, developing, or
1st transfer operation is not performed).
2. The 2nd Transfer Roller is pressed against the Transfer Belt.
3. A constant current is applied to the 2nd Transfer Roller.
4. The voltage value is read and, using a conversion formula, the output value of the
transfer voltage (T2) is determined.
5. The established output value is backed up and the transfer output is produced accord-
ing to the environment before the print cycle is started.
6. The last output value is used when an ATVC detection error occurs.
Start
Constant current is applied to
the 2nd Transfer Roller.
The current value of the 2nd
Transfer Roller is measured.
End
The 2nd transfer output voltage
is established.
4138to2142e0
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