Canon imageRUNNER ADVANCE C5500 Series Service Manual page 119

■ Toner Container Detection
This machine detects the presence/absence of the Toner Bottle by checking whether the cover is opened or closed.
The bottle cover employs a mechanism where the bottle cover closes when a bottle is inserted. Therefore, the cover closed state
is judged as "Bottle present" and the cover open state is judged as "Bottle absent".
The bottle cover opened/closed state is detected by the Bottle Cover Open/Close Switches (Y/M/C/K) (SW11/SW12/SW13/
SW14).
NOTE:
The bottle cover is not normally opened unless theBottle Empty state occurs.
Related Error Code
Toner Bottle Inner Door open detection error:
E025-01C0
E025-02C0
E025-03C0
E025-04C0
■ ATR Control
ATR control (Auto Toner Replenishment) supplies toner to the Developing Assembly from the Hopper Unit such that the developer
(toner + carrier) in the Developing Assembly has an ideal ratio.
Adjustment timing/conditions:
At job completion: For each accumulated duty of 2100%, or each 140 sheets fed
During a job: For each accumulated duty of 3000%, or each 200 sheets fed
Control description:
ATR control is performed using the following steps.
1. Based on the toner supply count, the supply amount is calculated.
2. Based on detection data from the ATR Sensor (TS5/6/7/8), the toner supply amount is corrected to keep TD ratio in the
Developing Assembly constant (toner ratio in the developer).
3. A patch is formed at a specified timing, and the ATR target correction amount is determined based on the detection
data.
The toner density of each color is corrected to the target value and is controlled to achieve an appropriate toner supply to
the Developing Unit. The DC Controller PCB determines toner supply amount by the following 2 data:
• ATR Sensor output value
• Toner supply count value
The DC Controller PCB turns ON the Bottle Motors (Y/M/C/K) (M9/10/11/12) when it determines that toner supply is
necessary.
This supplies the specified amount of toner to the Developing Unit.
Bottle Cover Open/Close Switch
(SW11/ SW12/ SW13/ SW14)
Bottle [ON]
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2. Technology
Bottle [OFF]