Sharp XE-A203 Service Manual - Page 13

CHAPTER 5. TEST FUNCTION 1. TEST ITEMS The test items are as follows. NO. 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 DISPLAY TEST 8) 110 DRAWER OPEN TEST 9) 120 EXTERNAL RAM TEST 10) 121 CPU INTERNAL RAM TEST 11) 140 CPU INTERNAL ROM TEST 12) 160 AD CONVERSION PORT TEST 13) 173 WINDING SPOOL CHECK TEST 14) 520 USB COMMUNICATION TEST 15) 550 SLEEP MODE TEST 16) 620 SD CARD TEST 1) STARTING DIAG Mode switch position: "PGM" mode Key operation: Above code + "RCPT/PO" key 2. DESCRIPTION OF EACH DIAGNOSTIC PROGRAM 1) DISPLAY BUZZER TEST 1 Key operation 100 RCPT/PO 2 Test procedure The decimal point will shift in steps of 1 digit from the lower digit to the upper (every 200m sec). After that, all segments turn on (about 1 sec). This mode is repeated. At the same time, the buzzer sounds continuously. 3 Display OP display: 1. 2. 3. 4. 5. 6. 7. 8. 9. 0. POPUP display: 4. 5. 6. 7. 8. 9. 0. Repeat OP display: 8. 8. 8. 8. 8. 8. 8. 8. 8. 8. POPUP display: 8. 8. 8. 8. 8. 8. 8. 4 End of testing You can exit the test mode by pressing any key. The following is printed. End print: 100 2) KEY CODE 1 Key operation 101 RCPT/PO 2 Test procedure Every time a key is pressed, the code of that key is displayed as a decimal number. 3 Display OP display: 101 POPUP display: (*) * * * = Key code * ** *** 4 End of testing You can exit the test mode by turning the mode switch to a position other than the SRV mode. The printer prints as follows. End print: 101 3) PRINTER TEST 1 Key operation 102 RCPT/PO 2 Test procedure 3 lines of 24 Z's are printed. 3 Display OP display: 102 POPUP display: Print: ZZZZZZZZZZZZZZZZZZZZZZZZ ZZZZZZZZZZZZZZZZZZZZZZZZ ZZZZZZZZZZZZZZZZZZZZZZZZ 4 End of testing The test will automatically be terminated after the printer prints. XE-A203U/XE-A203A TEST FUNCTION - 11 -