Epson TM-U375 - Circuit Block Diagram

2-15
See Chapter 7 for the TM-U375P circuit block diagram.
Figure 2-38. Circuit Block Diagram
The main circuit board unit and the switch circuit board unit
contain the following electrical circuits:
● Switch circuit board unit
• Paper feed switch
• Slip paper bail release switch
• LEDs (POWER, ERROR, JOURNAL OUT,
VALIDATION/SLIP)
• Cover open sensor
● Main circuit board unit
• Power supply circuit
• Reset circuit
• CPU
• Memory [ROM: 512K (64K x 8 bits); RAM: 256K
(32K x 8 bits)]
• Gate array
• Operation panel control circuit
• Host interface circuit
• Customer display interface circuit (*)
• Drawer kick-out drive circuit
• Print head solenoid drive circuit
• Carriage motor drive circuit
• Paper feed motor drive circuit
• Platen switching solenoid drive circuit
• Clutch solenoid drive circuit
• Slip paper switching solenoid drive circuit
• Printer mechanism overcurrent protection circuit
• Various sensor control circuits
• IM-403 control circuit (*)
(*) Not available for the TM-U375P.
■ Circuit block diagram
Figure 2-38 shows the circuit block diagram for the TM-U375.
CONFIDENTIAL