Ricoh D014 Service Manual page 635

5.4 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 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
SM
CÓPIA NÃO CONTROLADA
[0 to 5./0.01 V]
5-93
CÓPIA NÃO CONTROLADA
Group 3000
D014/D015/D078/D079