3.I/F PCB
The I/F PCB consists of two connectors (8-pin modular jack connectors) for connection of
the printer to other optional devices, a paper pressure motor, a cassette sensor, an open
cover sensor connector, and a connector for connection of the harness from the main
PCB.
This board only relays signals among the paper pressure motor, cassette sensor, open
cover sensor and printer and the main PCB.
4.COMMUNICATION WITH THE PRINTER
A 3-line clock synchronous serial interface is used for communication between the
Duplex unit and the printer.
The following describe the timing of communication way.
PrinterDuplex unit
SIDATA
DATAOUTDATAIN
DATAINDATAOUT
SICLK
CLKOUTCLKIN
/ATTN
/ATNOUT/ATNIN
/OP RESET
/OPRST/RESET
+24V+24VREG.+5V
GNDGNDGND
+24V
Figure 3.2
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