Ricoh FT 4015 Service Manual page 45

20 December 1996
2) Toner Supply Amount
- Method 1 -
Normally (if 0 or 1 is selected with SP30), the toner supply amount is
determined by the difference between the actual TD sensor voltage (V
the target toner sensor voltage (V
relationship between the sensor output and the toner supply motor on time
for each copy.
Toner Supply Level
1
2
3
4
5
6 (Near End Level)
7 (Toner End Level)
- Method 2 -
If 2 or 3 is selected with SP30, a fixed amount of toner is supplied when the
TD sensor voltage becomes higher than the target toner sensor voltage. The
amount of toner can be selected using SP32.
SP32 Setting
0
1
2
3
4
5
Stays on until the TD sensor
6 voltage becomes lower than the
target voltage.
7
TS
TD Sensor Voltage Level [V
< V ≤ V
V
TS T TS
V + S/16 < V
TS
V + S/8 < V
TS T
V + S/4 < V
TS T
V + S/2 < V
TS T
≥ V
V + 4S/5
T TS
≥ V
V + S
T TS
The toner supply time unit "t" can be changed using SP31.
t = SP31 setting x 0.1 [second] (Default: 4 = 0.4 second)
S: TD Sensor Sensitivity (SP36)
* This value can be changed using SP35.
Toner Supply Motor On Time
(seconds)
0.3
0.6
1.2
2.4
3.6
4.8
0 (No toner supply)
). The following table shows the
] Toner Supply Motor On Time
T
+ S/16
≤ V
+ S/8
T TS
≤ V
+ S/4
TS
≤ V
+ S/2
TS
≤ V
+ 4S/5
TS
Corresponding image area ratio
2-31
TONER SUPPLY
) and
T
t
2 x t
4 x t
8 x t
16 x t
*10 seconds
*10 seconds
(%)
3.5
7
15
30
45
60
0