7 Special Circuit Descriptions
7-2
SAM4S ER-380M/F SERIES
7-1 Power Circuit
7-1-1 VDISP : +30VDC
+30VAC is rectified by the bridge diode (D4,D5,D6,D7) and the capacitors(C40,C27).
7-1-2 VDRV : +24VDC
+24VDC is produced by the bridge diode (BD1) and the capacitors(C5,C25). This voltage is used as a Cash Drawer
Solenoid driving voltage and a source voltage of the other voltage sources.
7-1-3
VCC :
+5VDC
+5Vdc Logic driving voltage is produced by U5(MC7805). The voltage is smoothed by C50(100uF) and then +5Vdc
Logic voltage is produced .
7-1-4 VPRT : +8.5VDC
+8.5VDC Thermal Printer driving voltage is produced by the step-down dc-dc converter U4(34063A). That is, U4
produces rectangular wave at the collector of Q10(A1010) by switching Q6 using +24VDC. This makes D3(IN5822)
and L6 store energy. The voltage is smoothed by C34(470uF) and then +8.5VDC thermal printer driving voltage is
produced .
7-1-5
VPH
:
+8.5Vdc
+8.5VDC Thermal Printer Head driving voltage is produced by VPH_ONOFF signal of CPU and the related
Circuit(Q11,Q16,17) on Main PWB. The Source Voltage is VPRT
(8.5V).
7-1-6 VBT : +Min 3.6Vdc
The Source Voltage is VCC(5V). When AC Power is off, VBT is supplied to SRAM, RTC for saving the data.
Summary of Contents for ER-380F
Page 2: ......
Page 19: ...2 Product Specifications 2 12 SAM4S ER 380M F SERIES MEMO ...
Page 31: ...5 Maintenance and Adjustment 5 2 SAM4S ER 380M F SERIES MEMO ...
Page 39: ...6 Reference Information 6 8 SAM4S ER 380M F SERIES MEMO ...
Page 51: ...8 Troubleshooting 8 4 SAM4S ER 380M F SERIES ...
Page 54: ...8 Troubleshooting SAM4S ER 380M F SERIES 8 7 ...
Page 57: ...8 Troubleshooting 8 10 SAM4S ER 380M F SERIES MEMO ...
Page 73: ...9 Exploded Views and Parts List 9 16 SAM4S ER 380M F SERIES MEMO ...
Page 85: ...10 PCB Layout and Parts List 10 12 SAM4S ER 380M F SERIES MEMO ...
Page 89: ...12 Wiring Diagram 12 2 SAM4S ER 380M F SERIES MEMO ...
Page 105: ...13 16 SAM4S ER 380M F SERIES ...
Page 107: ...13 18 SAM4S ER 380M F SERIES MEMO ...
Page 109: ......
Page 110: ...ⓒ Shin Heung Precision March 2004 Printed in KOREA V1 0 Code No JK68 60955A ...