Samsung ER-655 Service Manual download

Languages: English
Manual type:Service Manual
Pages:83
Instant delivery to e-mail
You can buy the full version and download it in PDF format instantly.
Page 1 of 83
Samsung ER-655
7-1
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.
Figure 7-1 Power Block Diagram
No.
Voltage
Description
1
V
DI
(+30VDC)
Rear VFD Grid/Anode Driving Voltage
2
V
PH
(+28VDC)
Dot Printer Head Driving Voltage
3
V
pp
(+24VDC)
Cash Drawer Solenoid Driving Voltage
4
V
CC
(+5VDC)
Logic IC Driving / LCD / VFD Filament Voltage
Table 7-1 Power Source Voltage Descriptions
AC FILTER
CIRCUIT
BOARD
POWER
TRANS
POWER
RECTIFICATION
CIRCUIT #1
V
DI
(+30V)
V
PH
(+28V)
V
PH
(+28V)
V
pp
(+24V)
V
CC
(+5V)
MAIN BOARD
POWER
RECTIFICATION
CIRCUIT #2
VOLTAGE
REGULATION
CIRCUIT #1
VOLTAGE
REGULATION
CIRCUIT #2
[For Logic, LCD, VFD]
[For Motor, Drawer, Other]
[For Dot Head ]
[For Rear VFD Display]
Sample
This manual is suitable for devices