Ricoh Aficio FT4027, Service Manual

Page: 527 / 685

The temperature corrections are as shown below.
•
Temperature Correction (Copying) - Base drum charge voltage = –1,500 V
•
Temperature Correction (V
SP
Pattern) - Base drum charge = –1,370 V
– A204, A206, and A207 –
Drum Charge Roller
Temperature (
°
C)
Temperature Correction
V
SP
Pattern Copying
35.0
≤
T
+53 –57.0
28.0
≤
T < 35.0
–83.5 + 3.9T –211.0 + 4.4T
10.0
≤
T < 28.0 –217.6 + 8.7T –410.0 + 11.5T
T < 10.0 –130.0 –295.0
– A208, A210, and A211 –
Drum Charge Roller
Temperature (
°
C)
Temperature Correction
V
SP
Pattern Copying
35.0
≤
T +47 –61.0
29.0
≤
T < 35.0
–51.0 + 2.8T –173.0 + 3.2T
10.0
≤
T < 29.0
–199.1 + 7.9T –355.5 + 9.5T
T < 10.0 –120.0 –260.0
PROCESS CONTROL
A207/A208/A211 1-24 SM