Canon Color iR C3480, Service Manual

Page: 266 / 774

Chapter 7
7-43
- E013-0001 (waste toner transport motor open circuit)
Occurs when an open circuit has been detected about 0.1 sec after the motor is driven.
7.8.2 Detecting the Level of Waste Toner
0013-8503
Color iR C3380G / Color iR C2880G / Color iR C3380i / Color iR C3380 / Color iR C2880i / Color iR C2880 / iR C3480 / iR C3480i / iR C3080 / iR C3080i / iR
C2550
The machine executes the following 2 types of detection to find out the level of waste toner collected inside the waste toner case:
- detection by an optical sensor
- detection with reference to the video count
The DC controller checks the result of these detection mechanisms when the power is turned on, when the front door is opened/closed, and for each print job. If it
finds that the level of waste toner is above a specific value, the DC controller issues to the main controller either of 2 messages (waste toner case full alert, waste
toner case full).
The following shows the relationship between messages and waste toner levels:
T-7-15
F-7-51
[1] Waste toner count
[2] Waste toner case full alert detection signal
[3] Waste toner case
[4] Waste toner
[5] Waste toner screw
UN6: waste toner sensor (optical sensor)
The following is a brief description of the foregoing types of detection:
1. detection by an optical sensor
The machine uses an optical sensor (UN8) mounted behind the waste toner case to check the amount of waste toner. The detection takes place when the level of
waste toner is between 0% and 95%, and the result is sent to the DC controller, which will issue a waste toner case full alert to the main controller when the result
indicates the level to be 95%.
MEMO:
The sensor consists of a light-emitting segment (LED) and a light-receiving segment (PD).
When the level of waste toner is low, the light from the LED is received by the photodiode. When the level increases, on the other hand, the presence of waste toner
blocks the light from the LED, thus preventing reception of light by the photodiode, thus causing the output of the sensor to change from High to Low. The change
in the sensor output causes the DC controller to assume that the waste toner case is 95% full with waste toner.
Message type Message contents
Waste toner
quantity
Detected by
Waste toner full warning
"Waste toner bottle needs to be replaced soon. (Continued printing possible.)"
Approx. 95% Optical sensor
Waste toner full
"Replace waste toner bottle."
100 % Video count
D-CON
M-CON
PS11
[1]
[4]
[4]
[3]
[3]
[2]
[5]