ER-A520U/ER-A530U DIAGNOSTIC PROGRAM
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CHAPTER 5. DIAGNOSTIC PROGRAM

1. TEST ITEMS

The test items are as follows:
*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
2Test procedure
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.
4End of testing
You can exit the test mode by pressing any key. The following is
printed.
100
2) KEY CODE
1Key operation
101 3
2Test procedure
3Check that:
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:
101
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
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.
CA/AT

DISP BUZZER SRV

0123456789ABCDEF

OP display
Rear display 4.5.6.7.8.9.0.
CA/AT

KEY CODE SRV

OP display
KEY CODEKEYBOARD