Canon iR C3380 series, Service Manual

Page: 242 / 610

Chapter 7
7-32
7.6 Toner Container
7.6.1 Overview
0014-0770
/ / / / iR C3380i / iR C3380 / iR C2880i / iR C2880
There are four toner retainers for Y, M, C and Bk. The retainer for each color is composed of toner and a stirring plate.
There is a hopper assembly under the toner retainer. There are an agitating plate, scraping spring and toner feed screw in the hopper assembly.
Next is the explanation of the toner feed route.
After a toner retainer is set to the main body, the toner is sent to the hopper assembly. The toner sent to the hopper assembly is fed to the drum unit by the toner
feed screw.
The electric load used for the feed route is the following three varieties and twelve loads.
- Motor: One variety, four motors used (toner feed motor)
- Sensor: Two varieties, eight sensors used (toner feed level sensor, toner residual level sensor)
F-7-42
[1] Stirring plate
[2] Agitating plate
[3] Scraping spring
[4] Toner feed screw
[5] Toner feed motor drive signal x4
[6] Toner sensor detection signal
[7] Toner feed level signalx4
[8] Toner container
[9] Drum unit
M8 through M11: Toner feed motor
PS3 through PS6: Toner feed level sensor
TS1 through TS4: Toner residual level sensor (piezosensor)
7.6.2 Supplying Toner
0014-0771
/ / / / iR C3380i / iR C3380 / iR C2880i / iR C2880
The toner for each color is fed from the toner retainer, via the hopper assembly, to the drum unit.
1. Toner feed control operation
There are two kinds of toner feeding, one is 'hopper feeding' from the toner retainer to the hopper assembly and another is 'drum feeding' from the hopper assembly
to the drum unit.
- Hopper toner refill
When the toner container is set in the main unit, the toner falls automatically into the hopper.
Also, during toner refill, the toner refill motors (M8 to M11) rotate forwards, causing the stirring plate and stirring spring to rotate, making it easier for the toner
to fall out.
- Drum unit toner refill
Drum feeding is executed by the toner feed motor (M8 to M11). By the negative rotation (CCW) of the toner feed motor (M8 to M11), the agitating plate, the
scraping spring and the toner feed screw are activated, and the toner on the hopper assembly is feed to the drum unit.
The above operations are controlled by the DC controller. The DC controller computes the amount of toner used from the ATR control results, uses this
information to judge how long the toner refill motor should be driven, and thus supplies the required amount of refill toner to the drum.
[9]
M8 11
[8]
[1]
[2]
[3]
PS3 PS6
TS1 TS4
[4]
[5] [6] [7]
M-CON
D-CON