Canon iR7086, Service Manual

Page: 271 / 735

Chapter 7
7-25
F-7-35
ERROR CODE:
- E020
0001 (Absence of toner in the developer)
The developer toner sensor (TS3) detects the absence of toner for more than 120 seconds although toner has been supplied to the developer.
0002 (Failure in feeding toner from the sub hopper to the buffer)
The buffer toner sensor (TS1) detects the absence of toner for more than 60 seconds and toner exists in the sub hopper although toner has been supplied to the buffer.
0003 (Failure in feeding toner from the sub hopper to the buffer)
The buffer toner sensor (TS1) detects the absence of toner for more than 210 seconds and toner exists in the sub hopper although toner has been supplied to the
buffer after the toner bottle was replaced.
0004 (Failure in feeding toner from the sub hopper to the buffer)
The buffer toner sensor (TS2) detects the absence of toner for more than 150 seconds and toner exists in the sub hopper although toner has been supplied to the
buffer after the toner bottle was replaced.
0005 (Absence of toner in the developer at installation)
The developer toner sensor (TS3) detects the absence of toner for more than 600 seconds at installation.
0006 (Absence of toner in the developer at installation)
The developer toner sensor (TS3) detects the absence of toner for more than 600 seconds after the sensor detected the presence of toner at installation.
0007 (Absence of toner in the buffer at installation)
The buffer toner sensor (TS1) detects the absence of toner for more than 60 seconds at installation.
0008 (Failure in the toner feeder motor)
When the toner feeder motor drives, a failure in the motor is detected for more than 3 seconds.
0009 (Failure in the buffer motor)
When the buffer motor drives, a failure in the motor is detected for more than 3 seconds.
0010 (Required to clear the E020 error)
The power was turned OFF/ON without the error being cleared.
7.8 Transfer Mechanism
7.8.1 Transfer Guide Bias
7.8.1.1 Overview
0010-8068
iR7105 / iR7095 / iR7086
The machine applies a bias whose polarity is the same as that of the toner to the transfer guide to prevent soiling of the surface of the transfer guide with toner (if
left alone, the toner will soil the back of paper). The following items are associated with the system used to control the charging of the transfer guide:
[1] transfer guide bias constant voltage control
[2] output control to suit the environment
The following shows the components associated with the machine's transfer guide charging control system:
90 sec
Toner supply
sequence started
Toner supply STBY
Sub hopper toner sensor
Toner bottle
If a toner absent condition is detected for 0.5 sec
or more, the motor supply sequence is started.
If a toner present condition is detected for
1.5 sec or more, the toner supply sequence
will be ended.
If the toner supply sequence is not finished at the end of the
machine operation, the sequence will be continued until its end.
Supply
If the sub hopper toner sensor detects a toner absent
condition for 90 sec while continuous printing is under way,
a message will be indicated on the touch panel to encourage
replacement of the toner bottle.
The machine remains ready for operation.