Toner Supply Mechanism - Ricoh Aficio MP2550B Service Manual

D017/d018/d019/d020

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Toner Supply Mechanism

The toner supply motor [A] drives the toner bottle [B] and the mylar blades [C]. First, the

toner falls down into the toner bottle holder. The toner supply mylar blades transfer the

toner to the slit [D]. When the PCU is installed in the machine, the shutter [E] above the

PCU is opened by the machine frame. Then the toner falls down into the development unit

through the slit and the shutter.

6.9.6 TONER DENSITY CONTROL

There are four modes for controlling toner supply as shown in the following tables. The

mode can be changed with by SP2-921. The factory setting is sensor control 1 mode.

Basically, toner density 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).

D017/D018/D019/D020

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