Charging Mechanism; Primary Charging Mechanism; Outline - Canon imageRUNNER 7095 Service Manual

Chapter 7

7.5 Charging Mechanism

7.5.1 Primary Charging Mechanism

7.5.1.1 Outline

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:
If the current is too high or too low, '0'.
When '1', high-voltage output is ready.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
Voltage input (between 0 and 12 V).
Uses this voltage to control the current value of the
primary charging bias.
7-12
J510A J723
18
17
0 V
16
HVDC_REMOTE
15
PRIMARY_CNT
14
PRIMARY_ERR
13
GRID-CNT
12
11
10
9
8
7
6
5
4
3
2
1
The primary charging bias varies as follows
in keeping with the potential of PR-CNT:
Relay PCB
J721
1 2 3 4
Primary charging wire
T601
J731
The grid bias varies as follows in keeping
with the potential of GRD-CNT:
Voltage input (between 0 and 12 V).
Uses this voltage to control the voltage value of the grid bias.
F-7-17
1600 A
800 A
11V 12V
3V
PR-CNT
Grid wire
900V
300V
3V
11V 12V
GRD-CNT
0010-8049