Developing Section - Kyocera TASKalfa 420i Service Manual

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Developing section

The developing section consists of the developing unit and the toner container.
The developing unit consists of the developing sleeve where a magnetic toner blade is formed, the doctor blade and the
developing spirals that agitate the toner. When the toner sensor (TNS) detects a low toner level in the developing unit, the
toner replenishment signal is output to the engine PWB (EPWB). The engine PWB (EPWB) that has received the signal
turns on the toner replenishment solenoid (TNFSOL) and replenishes toner from the toner container to the developing
unit. Also, the toner container sensor (TCS) checks whether or not toner remains in the toner container.
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Figure 2-1-11 Developing section
(1) Developing unit
(2) Developing sleeve
(3) Left developing spiral
(4) Right developing spiral
(5) Magnetic toner blade
(6) Toner sensor (TNS)
(7) Toner container
(8) Toner container sensor (TCS)
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2KR/2KS-2
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