Ricoh FT 4015 - Transfer Corona and Discharge Plate Circuit

7.2 TRANSFER CORONA AND DISCHARGE PLATE CIRCUIT
When the CPU drops CN102-4 from +24 V to 0 V, the transfer corona is
applied to the drum. When the CPU drops CN102-2 from 24 V to 0 V, a high
positive voltage (+2.2 kV) is applied to the discharge plate.
DC/DC
Converter
CN102-7
Drum
B
Zener
Diode
Protection
Circuit
DC/DC
Converter
DC/DC
Converter
DC/DC
Converter
GND
CN102-6
CN102-4
CN102-3
CN102-2
CN102-1
24 V
C Trigger
T Trigger
B-PWM
S Trigger
S
T
GC
5 V
4.7 k
Main Board High Voltage Supply Board
CN102-5
A219D506-3.wmf
IMAGE TRANSFER AND PAPER SEPARATION 20 December 1996
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