Transfer Charging Assembly Cleaning Mechanism - Canon ImageRunner iR8500 Series Service Manual

Chapter 8
In a low humidity environment, paper tends to dry
up collecting excess charges (high resistance); to
counter, the output is reduced.
Related Service Mode
COPIER> OPTION> BODY> TRSW-
P-B
(transfer current output correction
control ON/OFF)

8.7.2.4 Transfer Charging Assembly Cleaning Mechanism

iR105i/iR105+ / iR9070 / iR85+ / iR8070
8-34
Low humidity
Normal humidity
High humidity
When the wire cleaner is at the home position, '0'.
1 J509A
0V
6
TSWC-HP
7
13
Separation
charging
assembly
1 J509B
TSWC-RV
4
5
13
When '1', the wire cleaner moves toward the rear.
When making a double-sided print, paper will absorb fixing
oil and tend to collect less charges (low resistance); since
the discharge current along the trailing edge of paper will
be low, the output is not varied.
Transfer current correction (µA)
Single-sided printing Double-sided printing
+220
+150
F-8-47
T-8-22
1: do not vary the transfer current level. (default; select if
transfer faults occur along the trailing edge)
0: correct the transfer current level along the trailing edge
of paper.
Wires
Wire cleaner
Transfer
charging
assembly
TSWC-FW
When '1', the wire cleaner moves toward the front.
F-8-48
Home position
sensor (MSW6)
Transfer/separation
charging wire
cleaning motor (M9)
0006-9776