Principles Of Operation; Power Supply Circuitry - Epson TM-U200 Series Technical Manual

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Principles of Operation

Power Supply Circuitry

The power supply circuit is compact, uses a switching method, and is attached to the main
circuit board. The following sections describe printer power supply circuitry. The following
table shows power supply voltages and their usages.
Power supply voltage usage
Voltage
+5 V
+24 V
Filter circuit
The +24 V (24 to 30 V) DC power is input from CN1 through the filter circuit, which reduces
outside noise and keeps internally generated noise from flowing through the +24 V power line.
+24 VDC circuit
The +24 V power from the filter circuit is input to printer power and the +5 V regulator circuit.
Printer power and drawer drive power are the converted +24 ± 1 V that is regulated by series of
regulators (U2 to U4).
Rev. A
Usage
Logic circuitInterface circuit board
Operation panel circuitVarious detector circuits
Printer:
Carriage motorPaper feed motor
Print headAuto-cutter
Drawer kick-out drive
Mechanism Configuration and Operating Principles 2-17
TM-U200 Series (Type A/AM)Technical Manual