Timing Chart: Cleaning Mode
Before cleaning starts, the main motor, charge corona, and quenching lamp
turn on.
T1. Cleaning bias is applied to the transfer roller.
T2. A positive constant current of + 5
±
0.2
µ
A is applied to transfer back to
the drum any toner which is positively charged by the transfer roller.
Main
Motor
Charge
Toner
Application
Roller
Development
Roller
Transfer
Roller
Quenching
Lamp
0.3
1
1.4
0.67
0.75
5 (Bypass feed: 6.5)
0.02
GND
ON
ON
ON
OFF
OFF
OFF
-50V
-700V
+250V
GND
-400V
+5
µ
A
-1000V
0.270
T1
T2
H521D663.wmf
May 22nd, 1995
DETAILED SECTION DESCRIPTIONS
PRINTING
2-49