Ricoh FT5535 Service Manual page 646

PROCESS CONTROL
5. PROCESS CONTROL
Refer to the A204/A206/A207/A208/A210/A211 service manual for detailed
information.
5.1 TEMPERATURE CORRECTION
Temperature correction has changed, as explained below. Also, the
machine no longer performs drum rotation time correction.
The new drum charge roller needs only about half the correction voltage that
was needed in the base copier. Further, the level of correction needed for the
lowest temperature point (5°C) is about the same as the normal room
temperature point for the base copier [A].
In the base machine, rotation time correction was only needed for low
temperatures where the temperature correction was large. In the new
machines, the temperature correction is never greater than –300 V, so the
rotation time correction has been eliminated.
•
Temperature Correction (Copying) - Base drum charge voltage = –1,500 V
•
Temperature Correction (V
Drum Charge Roller
Temperature (°C)
35.0 ≤ T
28.0 ≤ T < 35.0
10.0 ≤ T < 28.0
T < 10.0
A212/A214
CÓPIA NÃO CONTROLADA
Pattern) - Base drum charge = –1,370 V
SP
Temperature Correction
V Pattern
SP
0
–200.0 + 5.7T
–320 + 10.0T
–220.0
5-16
CÓPIA NÃO CONTROLADA
A212D500.wmf
Copying
–150.0
–300.0 + 4.3T
–428.9 + 8.9T
–340.0
SM