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COPYRIGHT
©
1999 CANON INC. CANON imageRUNNER 600 REV.1 JAN. 2000 PRINTED IN U.S.A.
6-27
CHAPTER 6 IMAGE FORMATION SYSTEM
E. Controlling the Transfer Charging Mechanism
1. Outline
The transfer charging mechanism is controlled for the following:
[1] DC bias constant current
[2] Output to suit the environment (fuzzy control)
[3] Output correction at the trailing edge of paper
Figure 6-309 shows the construction of the transfer charging control system.
Figure 6-309 Construction of the Control System
DC controller PCB
J510A
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16
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0 V
24 VH
24 VH
HVDC-EN
TR-CNT
TR-ERR
GND
GND
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2
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4
Relay PCB
Transfer charging wire
T701
3V
11V 12V
-650µA
TR-CNT
The transfer current varies as follows
according to the TR-CNT potential.
Transfer
current
When '1', high voltage output is ready.
A voltage input between 0 and 12 V,
used to control the transfer current
output.
When an overcurrent or
an under current is
detected, '1'.
High-voltage DC PCB