3DS
2-3-1
2-3-1 Duplexer board
(1) Duplexer board
Figure 2-3-1 Duplexer board circuit block diagram
The duplexer board serially communicates with the engine board of the printer to exchange control signals.
In the duplex mode, upon reception of a control signal from the engine board of the printer, CPU IC4 controls the paper
conveying operation in the duplexer by operating the motors and the solenoid while detecting the paper conveying status via
the sensors.
The motor drive circuit consists mainly of motor driver IC2 and IC3. It drives the switchback motor and paper refeed motor
based on the control signals (SBM, PRM) from CPU IC4.
The reset circuit consists mainly of reset IC7. It monitors the 5 V DC supply voltage. When the power is turned on or when
the power supply becomes low, it outputs a RESET signal to CPU IC4, to prevent system malfunction or runaway.
SEL [2-0]
OPSDI, OPSDO
OPSCLK
OPREADY
Serial
communication
VPS, DDS,
SBS, SRS, DRS
5 V PB
BRSOL
5 V
5 V
24 V
24 V
CFM
24 V PB
SBM
RCISW
RESET
DI, DO
24 V PB
24 V PB
24 V PB
PG
24 V
24 V PB
Duplexer board
To
printer
engine
board
Reset
circuit
(IC7)
EEPROM
(IC6)
TR51
TR50
TR52
TR53
Motor drive
circuit
(IC3)
PRM
Rear cover
interlock switch
Motor drive
circuit
(IC2)
CPU
(IC4)
Branch
solenoid
Switchback
motor
Paper
refeed
motor
PG
SG
24 V PB
PG
PG
SG
Cooling
fan
motor
1 and 2
Sensors
To
paper
feeder
Содержание DU-61
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