Epson TM-U950 Technical Manual page 92

CONFIDENTIAL
Actuator irregular operation protection circui
This circuit protects the printer from a current duration due to CPU abnormal operation.
POW_TRG signal is connected to gate array PC5 and U8A is triggered by the signal. POW_TRG
signal is a trigger for power supply control, and the signal is cut when CPU operates
abnormally. As a result of the cut, all the actuator drivers except the print head and the auto-
cutter are turned off.
Mechanism sensor circuits
All the sensors except the slip paper insert and eject sensors receive signals from the printer
mechanism, and the signals are input to CPU and gate array via pull-up resistance and integral
circuit.
Rev. A
Figure 2-60. Irregular Operation Protection Circuit
Mechanism Configuration and Operating Principles 2-47
TM-U950/U950P Technical Manual
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