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e-STUDIO3511/4511 DEVELOPER UNIT 12 - 14 November 2003 © TOSHIBA TEC
12
When the toner density is low:
Toner ratio to the carrier in the developer material decreases.
→ The light reflection amount decreases.
→ Detection output (voltage) decreases.
When the toner density is high:
Toner ratio to the carrier in the developer material increases.
→ The light reflection amount increases.
→ Detection output (voltage) increases.
12.6.4 Color toner supply
1. The color developer unit whose toner needs to be supplied moves to the developing position.
2. The developer unit is driven and the toner is supplied for a regulated period of time.
3. The drive is stopped and the unit moves to the color toner density detection position to detect the
density.
4. When the toner density detected is higher than the regulated value, it moves to the escape position.
When the toner density detected is lower than the regulated value, it repeats the procedure 1 to 3 for
five times. If the toner density is still lower than the regulated value, it is judged as “toner empty” and
the unit moves to the escape position.
5. Procedure 1 to 4 is repeated for other color developer units when the toner supply is needed.