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[10] RADF ELECTRICAL SECTION
1. General
This circuit controls feeding, stopping, and reversing of the document. It is composed of sensors, switches, the circuit which processes signals from
the copier PPC, the circuit which drives motors, solenoids, and clutches, the CPU, the G/A and its peripheral circuits.
2. Block diagram
TXD
RXD
Communication
DTR
I/O circuit
DSR
RES
SGND
Original feed
sensor input
DFD
circuit
Timing sensor
DTD
input circuit
DIP switch
push switch
Paper feed motor
DFMRS
rotation sensor
input circuit
Original width
DWVR
volume input
circuit
Original width
DWS
sensor input
circuit
Original length
DLS1
sensor input
DLS2
circuit
Original end
DED
sensor input
circuit
Reverse
RDD
sensor input
circuit
Original set
DSS
sensor input
circuit
Cover
AUOD
open/close
FGOD
switch input
TGOD
circuit
CPU
Display LED
(IC11)
lighting circuit
Transport
motor drive
circuit
Paper exit
reverse motor
drive circuit
EEPROM
(IC3)
Reset circuit
DATA BUS
ADRESS BUS
ADRESS DATA BUS
Address
latch
(IC2)
Oscillation
circuit
9.83MHz
10 – 1
A
G/A
(IC7)
B
Oscillation
circuit
5.0MHz
ROM
(IC2)
DC+24V
ADF FEED lamp
REMOTE DOCUMENT lamp
Paper feed
motor drive
DFM
circuit
Current
control circuit
Paper feed
solenoid drive
DFSOL
circuit
Reverse
solenoid drive
DRSOL
circuit
A
DTM
B
DRM
Power input
circuit
+5V
DC+24V
Rush current
SGND
+5V
prevention
circuit
PGND
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