Ricoh A219 Service Manual page 73

TONER SUPPLY
1) Target Toner Sensor Voltage
- Method 1 -
Normally (if 0 or 2 is selected with SP30) the voltage is determined by the
following factors:
Target Toner Sensor Voltage (V
a) Initial Developer Setting Voltage (V
This voltage is adjusted to 1.9 ± 0.1 V during developer initialization
(refer to Toner Density Detection).
b) Toner Density Adjustment Factor
The target toner density can be changed by customers or service
engineers using SP mode 38 or user tool No. 6.
User Tool 6
SP 38 Setting
0
1
2
3
4
The sensor sensitivity is stored in SP36.
TD Sensor Sensitivity (S) [V/wt%] =
Change of TD sensor output [V]/Change of toner density [wt%] =
SP36 setting x 0.05 [V] (Default: SP36 = 15)
- Method 2 -
If 1 or 3 is selected with SP30, the setting of SP53 is used as the target toner
sensor voltage. In this case, the target toner sensor voltage is determined by
the following formula:
Target Toner Sensor Voltage = SP53 setting x 0.02 [V] (Default: 97 = 1.94 V)
The TD sensor initial setting is not changed by this SP mode. However, it is
ignored if method 2 is selected.
A219
CÓPIA NÃO CONTROLADA
) = Initial Developer Setting Voltage (V
TS
Toner Density Adjustment Factor
)
T0
Toner Density
Setting
0 Normal
1 Darker
2 Lighter
Darkest
Lightest
S: TD Sensor Sensitivity (SP36)
2-30
CÓPIA NÃO CONTROLADA
+
Toner Density
Adjustment Factor (β)
–S x 1/2
+S x 1/2
)
T0
0
–S
+S
Default: Normal
SM