2-4
2) Maintain standard toner density
While checking the output voltage of the TDC sensor for every copy, control the
timing of toner supply to the developer unit so that the output voltage is 2.5V at
all times to keep the toner density constant.
Supply toner: supply from reserve tank for 6 seconds
(amount of toner supply: approx. 1.4 g)
Rotate bottle for 7 seconds: supply toner to reserve
tank. (Toner is not supplied to developer unit.)
Check TDC sensor output voltage at copying (or mixing).
Is the measured output voltage over 2.5V?
Do not supply toner.
Note) During bottle rotating, toner is not supplied.
YES
NO
(Reference 1) Toner supply route
(Reference 2) Forced toner supply
Note: Bottle rotation means toner is being added to the reserve tank, not the
developer unit. This is not a final confirmation for proper TDC adjustment.
Reserve tank (hopper)
Developer unit
Bottle
Supply toner: supply for 4 seconds from reserve tank.
(amount of toner supply: approx. 1.1 g)
Rotate bottle for 7 seconds: supply toner to reserve tank.
(Toner is not supplied to developer unit.)
Perform twice.
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