Transfer Corona And Discharge Plate Circuit - Ricoh A219 Service Manual

IMAGE TRANSFER AND PAPER SEPARATION

7.2 TRANSFER CORONA AND DISCHARGE PLATE CIRCUIT

Main Board
24 V
C N 1 0 2 - 7
G N D
C N 1 0 2 - 6
C Trigger
C N 1 0 2 - 5
T Trigger
C N 1 0 2 - 4
B - P W M
C N 1 0 2 - 3
S Trigger
C N 1 0 2 - 2
5 V
4.7 k
C N 1 0 2 - 1
When the CPU drops CN102-4 from +24 V to 0 V, the transfer corona (-5kv)
is applied to the back of the copy paper and the drum. When the CPU drops
CN102-2 from 5V to LOW, a high positive voltage (+2.2 kV) is applied to the
discharge plate.
A219
CÓPIA NÃO CONTROLADA
High Voltage Supply Board
D C / D C
Converter
D C / D C
Converter
D C / D C
Converter
Zener
Diode
D C / D C
Converter
Protection
Circuit
2-36
CÓPIA NÃO CONTROLADA
G C
Drum
B
S
T
A219D506-3.wmf
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