Toshiba e-STUDIO2500c, Service Manual, Page: 265 / 402

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May 2006 © TOSHIBA TEC e-STUDIO2500c/3500c/3510c DEVELOPER UNIT
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[ 2 ] Operations of black auto-toner sensor
[ 2-1 ] Functions of the auto-toner sensor
• Initializing function: When unpacking and replacing the developer material
The automatic adjustment is made so that the output of the auto-toner sensor will be 1.42 V to 1.99
V for the toner density of new developer material.
• Toner density stabilizing function: During the printing operation
Through the following phases, the toner density is kept constant.
Toner is consumed.
→
Toner density decreases.
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Output change of the auto-toner sensor is detected depending on the humidity.
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Drives toner motor.
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Supplies toner to the developer unit from the toner cartridge.
• Toner-empty detection/clear function:
Detects toner being empty in the toner cartridge.
Drives toner motor.
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Output of the auto-toner sensor is not changed.
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Toner density is not changed.
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Detects toner being empty.
Toner-empty clear
Drives toner motor.
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Supplies toner from the toner cartridge.
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Output of the auto-toner sensor changes.
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Toner density recovers to its normal value.
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“Toner-empty” is cleared.