Sharp ER-A520, ER-A530 service manual Standard RAM Test, Option RAM Test

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11) STANDARD RAM TEST

1Key operation 120 3 CA/AT

2The standard RAM is checked.

The contents of memory must be the same before and after this test. RAM (100000H~1FFFFFH area) is tested in the following procedure:

a)Store data in the test areas

b)Write “00H”

c)Read and compare “00H” and then write”55H”

d)Read and compare “55H” and then write “AAH”

e)Read and compare “AAH”

f)Restore stored data

If an error occurs at a step, the error is printed.

If any error does not occur, the following addresses are checked in turns. Addresses to be checked:

300000H, 300001H, 300002H, 300004H, 300008H, 300010H, 300020H, 300040H, 300080H, 300100H, 300200H, 300400H, 300800H, 301000H, 302000H, 304000H, 308000H, 310000H, 320000H, 340000H, 380000H,

OP display

R

A

M

 

 

 

 

 

 

 

 

 

S

R

V

 

 

 

 

 

 

 

 

 

 

 

 

 

1

2

0

 

 

 

 

 

 

 

 

 

 

 

 

 

3Check: A) The completion print.

4End of testing

The program ends after printing as follows:

When the test ends normally:

1

2

0

When the test end abnormally: Ex – ~ –

1

2

0

*****

x = 1: Data error

x = 2: Address error

When an error occurs, the printer outputs the error message and the address where the error has occurred in the area *****.

12) OPTION RAM TEST

1Key operation 121 3 CA/AT

2The standard RAM is checked.

The test program tests internal RAM (10 Kbytes) of the CPU. The contents of memory must be stored before and after this test. RAM (00400H ~ 02BFFH area) is tested in the following procedure.

a)Store data in the test area.

b)Write “00H”

c)Read and compare “00H” and then write “55H”

d)Read and compare “55H” and then write “AAH”

e)Read and compare “AAH”

f)Restore stored data

If an error occurs at a step, the error is printed.

If any error does not occur, the following addresses are checked in turns.

Addresses to be checked:

400000H, 400001H, 400002H, 400004H, 400008H, 400010H, 400020H, 400040H, 400080H, 400100H, 400200H, 400400H, 400800H, 401000H, 402000H, 404000H, 408000H, 410000H, 420000H, 440000H, 480000H, 500000H,

OP display

C

P

U

 

R

A

M

 

 

 

 

 

S

R

V

 

 

 

 

 

 

 

 

 

 

1

2

1

 

 

 

 

 

 

 

 

 

 

 

 

 

3Check: The completion print.

4End of testing

The test program ends after printing.

 

 

 

When the test ends normally:

1

2

1

When the test ends abnormally: Ex – ~ –

1

2

1

*****

x = 1: Data error

x = 2: Address error

If an error occurs, the printer outputs the error message and the address where the error has occurred in the area *****.

ER-A520U/ER-A530U DIAGNOSTIC PROGRAM

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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 ResetHardware Description Block Diagram Memory MAPAddress MAP 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/ORistrictions on Print Ratio ResetBuzzer 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 TestROM Copy GND VCC IPL from EP-ROMIPL ROM 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

The Sharp ER-A530 and ER-A520 are advanced electronic cash registers designed to cater to the needs of small and medium-sized businesses. These models are known for their reliability, user-friendly interfaces, and robust features that enhance operational efficiency in retail environments.

One of the most prominent features of the ER-A530 and ER-A520 is their advanced transaction processing capabilities. Equipped with a high-speed thermal printer, these registers ensure quick and efficient printing of receipts, which is essential for maintaining customer satisfaction during busy hours. The print quality is clear and legible, providing customers with a professional receipt that reflects the brand's identity.

Both models boast an intuitive and ergonomic keypad layout, making it easy for staff to learn and operate the register with minimal training. The bright and easy-to-read LCD display is another key characteristic, allowing operators to view transaction details clearly in various lighting conditions. This user-friendly design reduces errors and speeds up the checkout process, making it ideal for busy retail settings.

In terms of storage capacity, the Sharp ER-A530 and ER-A520 can handle a substantial number of PLUs (Price Look Up codes), accommodating a wide range of products and services. This extensive capability is particularly beneficial for businesses with a diverse inventory, as it enables quick access to pricing and product information without needing to enter details manually for every sale.

Connectivity is another strong point for these registers. The ER-A530 and ER-A520 support various peripheral devices, including barcode scanners, cash drawers, and kitchen printers. This versatility allows businesses to create a more streamlined checkout process, enhancing overall operational efficiency.

Additionally, both models include advanced reporting features that allow business owners to track sales trends, monitor inventory levels, and analyze performance over time. This analytical capability is crucial for making informed decisions about inventory management, staffing, and sales strategies.

Moreover, the security features in the ER-A530 and ER-A520 ensure that sensitive financial data is protected. With password-protected access to programming and certain functions, businesses can safeguard against unauthorized use while maintaining a secure environment for transactions.

In summary, the Sharp ER-A530 and ER-A520 electronic cash registers stand out in the market for their reliable performance, user-friendly design, and a comprehensive set of features that accommodate the unique needs of retailers. These registers not only enhance customer service but also provide critical insights for inventory and sales management, making them an excellent choice for businesses looking to streamline their operations.
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