Ricoh A151, Field Service Manual

Page: 282 / 397

2. COPY PROCESS CONTROL
•
Drum residual voltage (V
R
) correction and detection have been
eliminated.
•
Drum wear correction has been eliminated.
Grid Voltage
Exposure Lamp
Voltage
Development Bias
Voltage
Erase Lamp
Image
Density
Control Standard image
density grid voltage
(–680 V)
+
Base exposure
lamp voltage
(Manual or ADS
mode) (SP48) Base bias voltage
factor
(Manual or ADS
mode) (SP34)
Depends on
paper size
and
reproduction
ratio
Auto image density
level factor (SP34)
+
V
L
correction factor
+
Reproduction ratio
correction factor
(A203 copier only)
+
Image bias voltage
adjustment factor
(SP37)
+
Note:
Base bias voltage at
manual ID level 7
can be adjusted with
SP50
Toner
Density
Detection Standard ID sensor
grid voltage
(–460 V) Same as image
density control Depends on ID
sensor bias setting
(SP33)
Note:
For the initial 499
copies, bias voltage
is increased by –20
volts
ID sensor
pattern
erase (Vsg
detection:
Full erase)
Between
Copies
0 Volts (Fixed) Exposure lamp turns
off –160 Volts (Fixed)
+
Full erase
(All LEDs
ON)
Image bias voltage
adjustment factor
(SP37)
NOTE: The boxed items can be adjusted by SP mode.
COPY PROCESS CONTROL
A202/A203 8-4 SM