Group 3000 - Ricoh V-C3 D081 Field Service Manual

4. Appendix: Service Program Mode Tables

Group 3000

3001 TD Sn:Vt Display
Displays the current value of Vt (output voltage of the TD sensor). This is the value that the
machine uses to calculate the density of the toner in each development unit. The toner density
is checked after every page prints. The TD sensor output voltage is inversely proportional to
the toner density:
• If toner density is high, the voltage is low.
• If toner density is low, the voltage is high.
Note: These readings are used to control toner supply. When the machine uses PID logic to
4
control the machine (the default method selected with SP3301 001). The difference between
Vt and Vtref is calculated and this result is used to control the on time of the sub hopper
clutches that control the supply of toner to the PCUs.
1 Current Val:K
2 Current Val:M
3 Current Val:C
4 Current Val:Y
3002 Vtcnt:Disp/Set
Display Vtcnt (TD Sensor Control Voltage).
Use SP 3002-001 to 004 to display and confirm the present Vtcnt setting. Vtcnt is the TD
sensor control voltage. If there is a large difference between this value and the value of
SP3002-005 to 008 (Initial Vtcnt), this means that over time Vtcnt will require large
adjustments due to environmental conditions. The initial value of Vtcnt is determined when
the developer is initialized. This value is used as a reference to adjust Vt during the auto
process control self check and when the TD sensor checks the toner density between pages.
1 Current Val:K
2 Current Val:M
3 Current Val:C
4 Current Val:Y
242
[0 to 5./0.01 V]
[0 to 12/0.01 V]