3 Tests and Diagnostics
3.12 Real Timer Test
Libretto 50CT/70CT Maintenance Manual
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3
3.12 Real Timer Test
To execute the Real Timer Test select
9
from the Diagnostic Test Menu, press
Enter
and
follow the directions on the screen. The real timer test contains three subtests that test the
real timer functions. Move the highlight bar to the subtest you want to execute and press
Enter
.
Subtest 01
Real time
A new date and time can be input during this subtest. To execute the real time
subtest follow these steps:
1.
Select Subtest 01 and the following message displays:
Current date : XX-XX-XXXX
Current time : XX:XX:XX
Enter new date:
PRESS [ENTER] KEY TO EXIT TEST
2.
If the current date is not correct, input the correct date at the “Enter new
date” prompt and press
Enter
. The following prompt will display:
Enter new time :
3.
If the current time is not correct, input the correct time in 24-hour format.
Press
Enter
to
toggle between the time and the date. To exit, press
Ctrl +
Break
.
Subtest 02
Backup memory
This subtest performs the following backup memory check:
Writes 1-bit of “on” data to addresses 01h; 02h, 04h through 80h
Writes 1-bit of “off” data to addresses FEh, FB, FD through 7Fh
Writes the data patterns AAh and 55h to 50-byte memory
(addresses 0Eh to 7Fh)
The subtest reads and compares this data with the original data.
To exit, press
Ctrl + Break
.
Summary of Contents for Libretto 50CT
Page 8: ...viii Libretto 50CT 70CT Maintenance Manual ...
Page 10: ...Chapter 1 Hardware Overview ...
Page 11: ...1 ii Libretto 50CT 70CT Maintenance Manual ...
Page 30: ...Chapter 2 Troubleshooting Procedures ...
Page 31: ...2 ii Libretto 50CT 70CT Maintenance Manual ...
Page 61: ...Chapter 3 Tests and Diagnostics ...
Page 62: ...3 ii Libretto 50CT 70CT Maintenance Manual ...
Page 64: ...3 iv Libretto 50CT 70CT Maintenance Manual 3 22 2 Operations 3 45 ...
Page 128: ...Chapter 4 Replacement Procedures ...
Page 129: ...4 ii Libretto 50CT 70CT Maintenance Manual ...
Page 167: ...Appendices ...
Page 168: ...App ii Libretto 50CT 70CT Maintenance Manual ...
Page 178: ...Appendix B Board Layout B 4 Libretto 50CT 70CT Maintenance Manual ...
Page 183: ...Appendix C Pin Assignments Libretto 50CT 70CT Maintenance Manual C 5 ...
Page 186: ...Appendix Appendix C Pin Assignments C 8 Libretto 50CT 70CT Maintenance Manual 43 GND 44 NC ...
Page 194: ...Appendix F BIOS Rewrite Procedures F 2 Libretto 50CT 70CT Maintenance Manual ...
Page 196: ...Appendix G Reliability G 2 Libretto 50CT 70CT Maintenance Manual ...