Canon ImageRunner iR8500 Series, Руководство по обслуживанию, Страница: 368 / 1122

Chapter 8
8-28
F-8-37
T-8-18
8.6.5 Detecting the Toner Level and Controlling the Toner Supply Mechanism
0006-9842
iR105i/iR105+ / iR9070 / iR85+ / iR8070
Figure shows the construction of the toner supply control system.
Related Service Mode
COPIER>ADJUST>DEVELOP>
DE-DC
(image area developing DC bias output
input) If you have replaced the MFC PCB or initialized the
RAM on the MFC PCB, enter the value recorded on
the service label.
Settings: 0 to 500
COPIER>ADJUST>DEVELOP>
DE-NO-DC
(sheet-to-sheet-distance developing DC
bias output input)
COPIER>ADJUST>DEVELOP>
DE-OFST
(developing DC bias offset level offset
adjustment)
Settings: -50 to 50
DC controller PCB
J510A J723
J721
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16 1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
0 V
24 VH 24 VH
HVDC_REMOTE
DEV_DC_CNTR
DEV_AC_ON
GND GND
1 2 3 4
Relay PCB
Developing cylinder
J732
500V
3V
11V 12V
DEV_DC_CNTR
De
v
eloping DC bias
The developing DC bias varies as
follows according to the
DEV_DC_CNTR potential.
image area
Non-image
area
High-voltage DC PCB
When '1', developing
AC bias is generated.
AC output 1200 Vpp
A voltage input between 0
and 12 V, used to control the
voltage level of the
developing DC bias.
When '1', developing AC
bias is generated.
Lighter images
Lower setting
Higher setting
Darker images