Sharp ER-A520, ER-A530 Printer Control, Stepping Motor Control, Head Control, Other Ports

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4. PRINTER CONTROL

The PR-58HM printer is employed.

4-1. STEPPING MOTOR CONTROL

The stepping motor is driven at a constant current by SMA7036M (made by Sanken).

1step: 0.125mm, 1dot: 1step

Printing speed: 50mm/s

<CPU PORT>

No.

CPU PORT

Signal to be used

 

 

 

109

P10

RAS

 

 

 

108

P11

RBS

 

 

 

107

P12

RCS

 

 

 

106

P13

RDS

 

 

 

105

P14

JAS

 

 

 

104

P15

JBS

 

 

 

103

P16

JCS

 

 

 

102

P17

JDS

 

 

 

4-2. HEAD CONTROL

HEAD: All864dot

Printable area:RECEIPT side, 360dot;

JOURNAL side, 360dot

Related PORT

No.

CPU PORT

 

Signal to be used

 

 

 

 

 

2

P95/CLK2

 

PCLK

 

 

 

 

 

1

P96/TXD4

 

SO

 

 

 

 

 

144

P97/RXD4

 

SI

 

 

 

 

 

118

P110

 

STRB1#

 

 

 

 

 

117

P111

 

STRB2#

 

 

 

 

 

116

P112

 

STRB3#

 

 

 

 

 

115

P113

 

STRB4#

 

 

 

 

 

 

 

 

 

STB1#: 1~288dot: 288 dots in all

 

 

STB2#: 289~432dot:144 dots in all

Total 864 dots

STB3#: 433~576dot:144 dots in all

 

 

STB4#: 577~864dot:288 dots in all

 

 

 

 

 

 

 

*When turning off the printer power supply, make sure to turn /STB1,2,3,4 to “H.”

<DRIVING STEP>

*Do not turn on the printer under paper empty state.

RECEIPT MOTOR

 

Driver IC input (CPU output)

 

Motor drive signal

 

 

 

 

 

 

 

 

 

 

 

 

STEP

RAS

RBS

RCS

RDS

/RPFA

 

/RPFB

/RPFC

/RPFD

1

L

H

L

H

ON

 

OFF

ON

OFF

2

L

H

H

L

ON

 

OFF

OFF

ON

3

H

L

H

L

OFF

 

ON

OFF

ON

4

H

L

L

H

OFF

 

ON

ON

OFF

 

 

 

 

 

 

 

 

 

 

 

 

Driver IC input (CPU output)

 

Motor drive signal

 

 

 

 

 

 

 

 

 

 

 

 

STEP

JAS

JBS

JCS

JDS

/JPFA

 

/JPFB

/JPFC

 

/JPFD

1

L

H

H

L

ON

 

OFF

OFF

 

ON

2

L

H

L

H

ON

 

OFF

ON

 

OFF

3

H

L

L

H

OFF

 

ON

ON

 

OFF

4

H

L

H

L

OFF

 

ON

OFF

 

ON

 

 

 

 

 

 

 

 

 

 

 

*When the motor is stopped, rush conduction must be performed for 10ms in the same phase as the last excitation phase to turn off con- duction to all the phases.

3 RAS~RDS and JAS~JDS are turned to "L". Allow at least 30ms before boosting after stopping.

When boosting, rush conduction must be performed for 10ms in the first excitation phase to start the motor by acceleration control.

*During printing or paper feeding, after 10ms of turning on the printer head power, A/D conversion must be performed to check that the voltage is stabilized before starting the operation.

4-3. OTHER PORTS

No.

CPU PORT

Signal to be used

 

 

 

136

P103

PHUPS

 

 

 

135

P104

PRES

 

 

 

134

P105

PJES

 

 

 

133

P106

VHCOM

 

 

 

PHUPS: "1" Head up

PRES : "0" Receipt paper end

PJES : "0" Journal paper end

VHCOM: "1" Thermal head power control: On at "H" and OFF at "L". Turn off the power conduction when printing is completed (the motor is stopped).

ER-A520U/ER-A530U HARDWARE DESCRIPTION

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Image 11
Contents ER-A520 Model ER-A530 Keyboard SpecificationsAppearance RatingCONV2 ~ CONV4 CancelSlip DEPT#Mode Switch and Mode Keys Mode SwitchPrinter DisplayOptions 1.OPTIONS DrawerMaster Reset Master Reset and Program ResetMaster Reset Program ResetAddress MAP Block Diagram Memory MAPHardware Description CPU PIN Table AN6 Power CON Trol RTS3# Drive SignalRTS4# Drive Signal AN0 Temperature MonitorOther Ports Printer ControlStepping Motor Control Head ControlReference Voltage Printer Head Temperature MonitorD Conversion KEY/DISPLAY Printer Head Voltage MonitorKEY/DISPLAY Scan Display PowerFlash Memory Rewrite Procedure Serial I/OBuzzer ResetRistrictions on Print Ratio Display Buzzer Test Diagnostic ProgramTest Items Description of Each Diag ProgramPrinter Sensor Test Mode Switch TestPrinter Test Keyboard TestLCD CG Test Clock TestDrawer 1 Open & Sensor Test Drawer 2 Open & Sensor TestOption RAM Test Standard RAM TestFlash ROM Test CPU Internal RAM TestAD Conversion Port Test 16POLE Display TestRS Test 19SCANNER TestIPL ROM IPL from EP-ROMROM Copy GND VCC CPU Circuit Diagram and PWB Layout16M Flash ROM Sram / from / Eprom / PoffLCD I/F / KEY I/F Printer Driver RS232C Driver / UP-P16DP CN DRAWER1 Option RAM Connector / Printer Connector / Drawer+5V, Vled ER-A520U/ER-A530U Circuit Diagram and PWB Layout ER-A520U/ER-A530U Circuit Diagram and PWB Layout ER-A520U/ER-A530U Circuit Diagram and PWB Layout Sharp Corporation Copyright  2004 by Sharp Corporation

ER-A520, ER-A530 specifications

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