Sharp ER-A520, ER-A530

ER-A520U/ER-A530U CIRCUIT DIAGRAM AND PWB LAYOUT

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PWB LAYOUT

Contents

Main CODE : 00Z q SHARP CORPORATION ERA520USME ELECTRONIC CASH REGISTER ER-A520 CHAPTER 1. SPECIFICATIONS 1. APPEARANCE ER-A520 ER-A530 2. RATING ;: ,. STANDARD KEY LAYOUT 4. MODE SWITCH 4-1. MODE SWITCH AND MODE KEYS Operator key (OP) OP SM 5. DISPLAY 5-1. OPERATOR DISPLAY 2) PAPER 5-2. CUSTOMER DISPLAY 6. PRINTER CHAPTER 2. OPTIONS For U version k k CHAPTER 3. MASTER RESET AND PROGRAM RESET 1. MASTER RESET 1 2. MASTER RESET 2 3. PROGRAM RESET * CHAPTER 4. HARDWARE DESCRIPTION 1. BLOCK DIAGRAM STD SRAM(1MB) 2. MEMORY MAP 2-1. ADDRESS MAP 3. CPU PIN TABLE POWER SUPPLY/CONTROL PINS 4. PRINTER CONTROL 4-1. STEPPING MOTOR CONTROL * 3 4-2. HEAD CONTROL 5. A/D CONVERSION 5-1. PRINTER HEAD TEMPERATURE MONITOR 5-2. PRINTER HEAD VOLTAGE MONITOR 5-3. REFERENCE VOLTAGE 6. KEY/DISPLAY 6-2. KEY/DISPLAY SCAN 1 2 3 6-3. DISPLAY 7. SERIAL I/O 8. POWER /POFF detection point 9. FLASH MEMORY REWRITE PROCEDURE 10. DRAWER 11. RISTRICTIONS ON PRINT RATIO 12. BUZZER EFTRES 13. UP-P16DP I/F 14. RESET CHAPTER 5. DIAGNOSTIC PROGRAM 2. KEYBOARD KEY CODE SRV 101 R/J PRINTER SRV 4) KEYBOARD TEST 106 104 KEY BOARD SRV TIM CHECK SRV 8) DRAWER 1 OPEN & SENSOR TEST XY SRV 1 DRAWER SRVX RAM SRV 2 121 RAMCPU SRV 3 RAMCPU SRV 14) FLASH ROM TEST ROMFLASH SRV 3 15) AD CONVERSION PORT TEST RS TEST SRV 19)SCANNER TEST The read data is displayed on the left. *************** SC CHAPTER 6. IPL FROM EP-ROM 22 1/7 CHAPTER 7. CIRCUIT DIAGRAM AND PWB LAYOUT R23 47K R55 + 2/7 P-OFF SRAM / FROM / EPROM / POFF 16M FLASH ROM 24 3/7 + LCD I/F / KEY I/F 25 4/7 PRINTER DRIVER 26 5/7 RS232C DRIVER / UP-P16DP CN 27 6/7 DRAWER1 OPTION RAM CONNECTOR / PRINTER CONNECTOR / DRAWER DRAWER2 7/7 POWER Page Page Page q COPYRIGHT 2004 BY SHARP CORPORATION