Canon imagePRESS C1 Service Manual - page 408
Chapter 7
7-59
F-7-74
[1] Toner cartridge
[2] Toner sensor signal
[3] Hopper assembly
[4] Developing assembly
[5] Side driver PCB
TS1 to TS4: toner sensor (piezo sensor)
Video count detection
The mechanism of the video count detection is that toner level in the hopper assembly is determined by calculating the amount of toner consumption for each color
based on video data received from the main controller. This detection operates when the toner level is in the range of 100 to 10 %. The detection result after the
toner level becomes 0% will be sent to the side driver PCB.
The DC controller sends Toner Low 1 message to the main controller when the toner level reaches 10%. When reaching the specified print (A4, 200-print, color
ratio 10%) after the toner level reaches 0%, it sends Toner Empty message to the main controller.
Piezo sensor detection
The mechanism of piezo sensor detection is that piezoelectric oscillator toner sensor (TS1 to TS4) placed on the side of the hopper assembly determines the presence
of toner in the hopper assembly. This detection is activated when the toner level is 10% or less and the detection result will be sent to the side driver PCB.
The side driver PCB sends Toner Low 2 message to the main controller via the DC controller when the toner level reaches 0%.
1, When the toner is empty, this machine stops operation.
2, The toner level at which the Toner Low message appears can be changed to a different value anywhere between toner levels 5 % and 100% using the following
items in the Service Mode.
Service Mode: COPIER > OPTION > BODY > T-LW-LVL
7.8.8 Toner Level Detection
0020-4176
imagePRESS C1+ (Printer) / imagePRESS C1+
This machine employs two different methods shown below to detect toner level of each color in the hopper assembly.
1. Video count detection
2. Piezo sensor detection
Toner level is detected at all times. When the amount of toner falls below a specified volume, the side driver PCB sends 2 types of message (Toner Low, Toner
Empty) to the main controller via the DC controller.
Below is a table showing how each message relates to toner level.
T-7-16
Message Type
Message Content
Toner level
Detector
Toner Low1
'Prepare a new toner cartridge.' (Printing can be continued.)
10% (See *1.)
Video count
Toner Low 2
'Replace the toner cartridge.'(Printing can be continued.)
0% (See *1.)
Piezo sensor
MN-CON
DC-CON
TS1 TS4
[1]
[3]
[4]
[2]
[5]