Duplexer Board - Kyocera DU-61 Service Manual

2-3-1 Duplexer board

(1) Duplexer board
Branch
solenoid
Switchback
motor
Paper
refeed
motor
Rear cover
interlock switch
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.
Duplexer board
EEPROM
(IC6)
24 V
DI, DO
BRSOL
TR52
PG
24 V PB
24 V PB
Motor drive
circuit
SBM
(IC3)
PG
24 V PB
24 V PB
Motor drive
circuit
PRM
(IC2)
PG
24 V
RCISW
TR51
SG
24 V PB
Reset
RESET
circuit
(IC7)
Figure 2-3-1 Duplexer board circuit block diagram
5 V
TR50
VPS, DDS,
SBS, SRS, DRS
CPU
(IC4) 24 V PB
TR53
PG
SEL [2-0]
OPSDI, OPSDO
OPSCLK
OPREADY
Serial
communication
5 V PB
Sensors
SG
Cooling
fan
CFM
motor
1 and 2
24 V
5 V
To
printer
engine
board
To
paper
feeder
3DS
2-3-1