EC-PM-80320 Service Manual
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Reverse Electricity IR VR=5V ------- ------- 10uA
Light
Echo(output)
Black Estate Electricity ICEO IF=0Ma,VCE=10v ------- ------- 200nA
Photo electricity IC IF=0mA,VCE=5v 150uA ------- 600uA
Peak Electricity ILEAK IF=0mA,VCE=5v ------ ------- 1uA
Collected Saturated
Electricity
VCE
(sat)
IF=0mA,IC=5uA ------- ------- 0.5V
Responding
Time(Rising edge)
tr -------- 5us ------
Transmitted
character
Responding
Time(Descend edge)
tf
Ic=1mA,Vcc=5V
RL=100Ω
-------- 5us ------
4.2.3 Platen Position Sensor
Inside the printer, there is a platen position sensor (locates at the side of print head movement
platen) which is used to check whether the state of platen is open or closed, and the state is
displayed through a mechanical switch. When the platen is open, Please don’t heat the thermal
head, or the life of thermal head will be cut down obviously. The maximum rating of the sensor:
7VDC, 1mA; relative resistance: 70mΩ at most.
4.3 Working Principle of Control Unit
4.3.1 Structure module
Figure 4-7 is the main structure module of EC-PM-80320.
Table 4-5 Paper sensor Input/Output condition
Figure 4-7 EC-80320’s Structure Module
Control Panel
Cash drawer Interface
AC Adapter(24V)
Thermal Piece
Paper End Sensor
Paper Sensor
Platen Position Sensor
PCB main-board
Parallel interface
USB interface
USB + Serial interface
USB + Ethernet interface
USB + Bluetooth
USB + Wi-Fi
(Choose one)
Host computer
Paper Feed Motor
Cutter, Cutter Sensor