Canon imageRUNNER ADVANCE C350 series Service Manual page 121

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Technical Explanation > Image Formation System > Controls > Toner Supply Assembly
● Toner Log Detection
A Toner Log is detected.
Detection timing
When replacing Toner Container
Detection description
The Toner Log Connector (Y/M/C/Bk) (UN38, UN39, UN40, UN41) detect a Toner Log.
Toner Log Connector
(Y,M,C,Bk)
(UN38,39,40,41)
2 Technical Explanation > Image Formation System > Controls > Toner Supply Assembly
● ATR Control (Auto Toner Replenishment)
Toner is supplied to the Developing Assembly to make the developer (toner + carrier) in the
assembly to meet at an ideal ratio.
Control timing
• At every print job (each page)
Control description
Supply amount of the toner for each color is calculated by the abovementioned startup
timing, and toner is supplied to the Drum Unit. The DC Controller PCB determines toner
supply amount by the following 2 data:
• ATR Sensor output value (DC Controller)
• Video count value (Main Controller)
The DC Controller PCB turns ON the Bottle Motor (YM) (M09) and Bottle Motor (CK) (M10)
when it determines that toner supply is necessary.
This makes the Toner Feed Screw and the Developer Feed Screw A/B rotate so that the
specified amount of toner is supplied to the Developing Assembly.
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