Specifications

13. DUPLEX UNIT POWER DISTRIBUTION
AND OVERALL MACHINE CONTROL
When the main switch is turned on, the main transformer receives wall outlet
ac power through the ac drive board and outputs 10 volts ac and 26 volts ac
to the option dc power supply board. The option dc power supply board then
converts the 10 volts ac input to +5 volts and the 26 volts ac input to +24
volts. Then, the +5 volts and +24 volts are supplied to the duplex unit main
board. The interface board also provides +5 volts to the duplex unit main
board and sends a reset signal to initialize the duplex unit CPU.
The duplex unit main board supplies dc power to all electrical components in
the duplex unit. All motors and solenoid operate on +24 volts and all sensors
operate on +5 volts.
The duplex unit has its own CPU which controls all functions in the duplex
unit. The duplex unit CPU communicates with the copier through the interface
board using a serial interface.
26Vac
Reset Signal
+5V (VC)
Main Frame
AC Power
115 Vac
220/240 Vac
Option
DC Power
Supply Board
(PCB5)
Sensors
Motors
Solenoids
+24V
(VA)
+5V
(VC)
+24V
(VA)
+5V
(VC)
Duplex Unit
AC Drive
Board
(PCB2)
Main
Transformer
(TR1)
AC Power
115 Vac
220/240 Vac
10 Vac
CPU
IC702
Main Board
(PCB1)
RxD
TxD
Main Board
(PCB1)
Interface
Board
(PCB6)
TxD
RxD
1 December 1990
11-29