Sharp ER-A530, ER-A520 Diagnostic Program, Test Items, Description of Each Diag Program, KEY Code

CHAPTER 5. DIAGNOSTIC PROGRAM

1. TEST ITEMS

The test items are as follows:

	Code	Description
1)	100	Display buzzer test
2)	101	Key code
3)	102	Printer test
4)	104	Keyboard test
5)	105	Mode switch test
6)	106	Printer sensor test
7)	107	Clock test
8)	110	Drawer 1 open & sensor test
9)	111	Drawer 2 open & sensor test
10)	116	LCD CG test
11)	120	Standard RAM test
12)	121	OPTION RAM test
13)	122	CPU internal RAM test
14)	130	FLASH ROM test
15)	160	AD conversion port test
16)	400	POLE DISPLAY test
17)	500	RS232 ch1 test
18)	501	RS232 ch2 test
19)	510	SCANNER test

*Starting DIAG.

Mode switch: SRV

key operation: Above code + “CA/AT” key

2. DESCRIPTION OF EACH DIAG PROGRAM

1) DISPLAY BUZZER TEST

1Key operation 100 3 CA/AT

2Test procedure

OP display

D

I

S

P

B

U

Z

Z

E

R

S

R

V

0

1

2

3

4

5

6

7

8

9

A

B

C

D

E

F

Rear display

4.5.6.7.8.9.0.

The decimal point on the LED and the cursor on the LCD will shift from the lower digit to the upper digit in steps of 1 digit (every 200 msec)

After that, all segments will turn on (about 1 sec) These two modes are repeated.

At the same time, the buzzer sounds continuously.

3Check that:

A)Each position is correctly displayed.

B)The brightness of each number is uniform.

C)The buzzer sound is normal.

4 End of testing

You can exit the test mode by pressing any key. The following is printed.

1 0 0

2) KEY CODE

1Key operation 101 3 CA/AT

2Test procedure

OP display	K E Y	C O D E	S R V
	KEYBOARD		KEY CODE

3Check that:

KEYBOARD:	1: Normal type 0: Flat type
KEY code:	Every time a key is pressed, the hard code of that key
	is displayed as a decimal number.
	When a key is pressed twice or pressed in an incor-
	rect manner, --- will be displayed.

4End of testing

You can exit the test mode by turning the mode switch to a position other than the PGM mode. The printer prints as follows:

1 0 1

ER-A520U/ER-A530U DIAGNOSTIC PROGRAM

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