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Rev. 1.00
- 39 -
SRP-F310/312
4-3 Special Circuit Descriptions
4-3-1 Power Circuit
This system is operated under 100Vac or 240Vac. The power circuit supplies the three differential DC voltage
sources.
[Figure 4-3 Power Block Diagram]
1) Drawer Driving and Feed, Auto Cutter Motor Voltage and TPH Driving Voltage: +24VDC
+24VDC is supplied from SMPS. This Voltage is smoothed by capacitors (CE1).
This voltage is used as a Cash Drawer Solenoid Driving voltage, Step motor driving voltage and a source
voltage of the other voltage sources and TPH Driving Voltage.
2) IEEE1284 Logic IC Driving Voltage: +5VDC
Step down voltage the input +24VDC to +5VDC by a switching regulation U13(A4490SES-T)
3) CPU I/O, FPGA I/O, NAND Flash and etc. LOGIC Voltage: +3.3VDC
Step down voltage the input +5VDC to +3.3VDC by a regulation.U15(SI-3006KWM)
4) CPU A/D, USB core and OSC Voltage: +2.5VDC
Step down voltage the input +24VDC to +2.5VDC by a switching regulation.U13(A4490SES-T)
5) DDR2 Voltage: +1.8VDC
Step down voltage the input +5VDC to +1.8VDC by a regulation.U15(SI-3006KWM)