Ricoh K-C3.5L, Обучение по обслуживанию

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Model K-C3.5L
63
Ricoh Co. Ltd. http://www.ricoh.com/
Slide 63
Toner Density Control – 1
Overview
‰
Controlled by TD
and ID sensors.
‰
There are four
modes but only
two can be used.
(See notes below
for details.)
Toner Supply Motor
On Time Calculation
TD Sensor
Output (Vt)
Vt Reference
Voltage (Vref)
Vt Reference
Voltage Update
ID Sensor Output
(Vsp/Vsg)
TD Sensor Initial
Setting (Vts)
New Vref
Vref Update
There are four modes for controlling toner supply which can be changed with by SP
2921. The factory setting is SP2921 = 0.
Basically, the toner concentration in the developer is controlled using the standard TD
sensor voltage (Vts), toner supply reference voltage (Vref), actual TD sensor output
voltage (Vt), and ID sensor output data (Vsp/Vsg).
The Four Modes
• Sensor Mode 1: SP2921 = 0, Normal sensor control mode
• Sensor Mode 2: SP2921 = 1, Design use only (don't use)
• Fixed Mode 1: SP2921 = 2, Design use only (don't use)
• Fixed Mode 2: SP2921 = 3: Use temporarily if the TD sensor needs to be replaced.