Checking & Adjustment Of Bias (For Developer Unit) - KIP 9000 Service Manual

4. 3. 7 Checking & Adjustment of BIAS
(For Developer Unit)
Each roller in the Developer Unit is supplied with its own necessary voltage respectively in the
Print Cycle. These kinds of voltage supplied in the Print Cycle are called "Negative Developer
Bias". The following list shows the value of "Negative Developer Bias" to each roller.
Supplied to ;
Developer Roller
Toner Supply Roller
Regulation Roller (Center)
Regulation Roller (Side)
On the other hand, each of these rollers is supplied with its own necessary voltage respectively in
the Toner Collection Process, which is different from the voltage supplied in the Print Cycle. These
voltages supplied in the Toner Collection Process are called "Positive Developer Bias". The
following list shows the value of "Positive Developer Bias" to each roller.
Supplied to ;
Developer Roller
Toner Supply Roller
Regulation Roller (Center)
Regulation Roller (Side)
Regulation Roller (Side)
Developer Roller
Voltage Voltage
(Against the (Against the voltage of
ground) Developer Roller)
-250V +/-3V
-
-
- +365V +/-3V
Voltage Voltage
(Against the (Against the voltage of
ground) Developer Roller)
+350V +/-3V
- -350V +/-3V
- -100V +/-3V
- +365V +/-5V
Toner Supply Roller
4-83
Output Pin on
the BIAS
- Output 2
-350 +/-3V Output 1
-100V +/-3V Output 3
Output 4
Supplied from ;
(Output Pin on
the BIAS)
- Output 2
Output 1
Output 3
Output 4
Regulation Roller (Center)
Adjustment VR
on the BIAS
-
(Service Mode)
VR8
VR6
VR4
Adjustment VR
(VR on the
BIAS)
VR1
VR7
VR5
VR3
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