Canon IMAGERUNNER 7095 PRINTER, Руководство по обслуживанию

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Chapter 7
7-12
7.5 Charging Mechanism
7.5.1 Primary Charging Mechanism
7.5.1.1 Outline
0010-8049
The primary charging mechanism is controlled for the following:
[1] primary charging bias constant current control
[2] grid bias constant voltage control
The following shows the construction of the system that relates to primary charging control:
F-7-17
DC controller PCB
High-voltage DC PCB
J510A J723
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18 1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
0 V
24 VH 24 VH
GRID-CNT
PRIMARY_ERR
Voltage input (between 0 and 12 V).
Uses this voltage to control the current value of the
primary charging bias.
GND
GND
1 2 3 4
Relay PCB
Primary charging wire
Grid wire
T601
J731
If the current is too high or too low, '0'.
Voltage input (between 0 and 12 V).
Uses this voltage to control the voltage value of the grid bias.
3V
11V 12V
1600 A
800 A
The primary charging bias varies as follows
in keeping with the potential of PR-CNT:
900V
300V
The grid bias varies as follows in keeping
with the potential of GRD-CNT:
PR-CNT
3V
11V
GRD-CNT
12V
Gr
id bias
Pr
imar
y charging bias
When '1', high-voltage output is ready.
17
18
2
1
PRIMARY_CNT
HVDC_REMOTE
J721