Rev. A
Mechanism Configuration and Operating Principles 2-17
TM-U200 Series (Type A/AM)Technical Manual
C o n fid e n tia l
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.
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 con24 ± 1 V that is regulated by series of
regulators (U2 to U4).
Power supply voltage usage
Voltage
Usage
+5 V
Logic circuitInterface circuit board
Operation panel circuitVarious detector circuits
+24 V
Printer:
Carriage motorPaper feed motor
Print headAuto-cutter
Drawer kick-out drive
Summary of Contents for TM-U200 Series
Page 6: ...iv Confidential Revision Sheet Revision Page Altered Items and Contents Rev A ...
Page 72: ...2 30 Mechanism Configuration and Operating Principles Rev A Confidential ...
Page 172: ...6 Appendix Rev A Confidential Main Circuit Board Parts Layout ...
Page 176: ...10 Appendix Rev A Confidential ...
Page 186: ...Rev A Appendix A 20 TM U200 Series Type A AM Technical Manual Confidential ...
Page 187: ...Confidential SEIKO EPSON CORPORATION Printed in Japan ...
