Special Circuit Descriptions; Power Circuit - Sam4s ER-390 Series Service Manual

7 Special Circuit Descriptions

7-1 Power Circuit

This system is operated under 120Vac or 230Vac. All data is saved by the Battery when the Main power is turned off.
The power circuit supplies the five different DC voltage sources and one AC voltage source.
No. Voltage
1 VDISP (+30VDC)
2 VDRV (+24VDC)
3 VCC (+5VDC)
4 VPRT (+8.5VDC)
5 VPH (+8.5VDC)
6 VBT (+3.6VDC Min)
SAM4S ER-390 SERIES
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POWER
TRANS
VPRT(+8.5V)
VCC(+5.0V)
Figure 7-1 Power Block Diagram
VFD Grid/Anode Driving Voltage
Cash Drawer Solenoid Driving / Fiscal Writing Voltage
Logic IC Driving / VFD Filament Voltage
Thermal Printer Step Motor.
Thermal Printer Head Driving Voltage
Battery Voltage
Table 7-1 Power Source Voltage Descriptions
Power
Rectification
Circuit #1
Power
Rectification
Circuit #2
Voltage
Regulation
Circuit #1
Voltage
Regulation
Circuit #2
TPH Supply Volt.
On/Off Circuit
Battery Volt.
Storage Circuit
Description
VDISP(+30V)
[For VFD Display]
VDRV(+24V)
[For Drawer, Fiscal Volt.]
[Power Fail Source]
VPRT(+8.5V)
[For Printer LF Motor]
[For Spool Motor]
[For VPH Source]
VCC(+5V)
[For Logic, VFD]
VPH(+8.5V)
[For TPH Voltage]
VBT(+Min 3.6.V)
[For Battery Voltage]
7-1