Development Bias - Ricoh G133 Service Manual

During toner supply
During developer initialization
Filters [B] on the top of the developer hopper make sure that the internal pressure does not
become too high. These ducts are sealed not to let the toner solidify before installing.
This development unit does not operate very well if it has been placed in the condition of
over 50°C during transportation. The toner inside the development unit can become solid at
temperatures higher that this value. A developer initialization error shows if the toner does
become solid. At this time, you must do the following procedure:
You should also do this procedure when you install a new PCU.
1. Remove the (old) PCU.
2. Keep the (new) PCU level and shake it several times from side to side.
3. Install it in the machine.

Development Bias

The PSU supplies development bias to the development roller via the receptacle at the rear
of each development unit.
There is a dc bias voltage.
The machine automatically controls the dc bias if the automatic process control is enabled
(i.e., if SP3-041-001 is set to "1: CONTROL"). However, if process control is switched off,
(i.e., if SP3-041-001 is set to "0: FIXED"), the dc bias is the value stored in SP3-621-001 to
-012 (do not adjust in the field unless advised to do so).
New Unit Detection
SM
PCU (Photo Conductor Unit)
6-31 G133