Toner Supply Section
553
Toner Bottle Set Sensor Mechanism
Callout Item Callout Item
[A] Bottle ID Chip Contact Board [C] Toner Bottle
[B] ID Chip (One for Each Color)
Each toner bottle [C] has an ID chip [B]. When the toner bottle [C] comes in contact with the bottle ID chip
contact board [A], the machine detects that the toner bottle is set.
Toner Near End and Toner End
Toner Near-End
First, the amount of remaining toner is detected with the pixel count and the driving time of the toner supply
motor. Then, when the amount of remaining toner is less than the threshold for toner near-end (K = 23 g, CMY
= 10 g), the machine determines a toner near-end.
For CMY, when the amount of remaining toner is less than 50 g, or when the toner end sensor, which is a
piezoelectric sensor, detects toner near-end twice, the machine also determines a toner near-end.
Toner End
A toner end is detected when the toner end sensor detects the end threshold six times in the toner near-end
condition.
The machine also detects a toner end when the difference of Vt and Vtref, and their total difference are as in the
following matrix:
Condition Vt/Vtref: Diff Vt/Vtref: Diff: Total
K Before Near-End 0.7 V or more Over 10 V
After Near-End 0.3 V or more Over 3 V
CMY - 0.5 V or more Over 10 V
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