Toner Supply Control - Ricoh G-P3 Service Manual

Process Control
2
The quantity of toner on the transfer belt (M/A, mass per unit area, mg/cm ) is calculated for each of the
10 gradations of the sensor pattern. To do this, the machine uses the ID sensor output value from each
gradation of the pattern.
Step 5: V , V , V Selection and V Adjustment
D B L REF
6
The machine makes a plot of the 10 values of M/A against the development potential that was used to
make each of the gradations. Then it makes a line through the 10 points.
Then, it finds the development potential that is necessary to put the 'target M/A' of toner on the OPC.
This development potential is then used to find the best values of development bias, charge roller voltage
and laser power for the machine in its current condition. To do this, it refers to a table in memory.
The machine also adjusts V (toner density target) at the same time. As a result, the development gamma
REF
detected by process control will be the value stored in SP 3561 1 to 4 (do not adjust in the field unless told
to do this).
After that, the transfer belt cleaning unit cleans the transfer belt.

Toner Supply Control

Toner Supply Control Modes
This machine has four toner supply control modes. They are selected with SP 3301-1 to 4. (Default: SP3301
- 4)
1. Fixed supply mode
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