Toshiba Portege 2000, Maintenance Manual

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3.11 Real Timer TestReal Timer Test 3 Tests and Diagnostics
Portege 2000 Maintenance Manual (960-333) 3-25
3.11 Real Timer Test
To execute the Real Timer Test, select
9-REAL TIMER TEST
from the DIAGNOSTIC
TEST MENU, press Enter and follow the directions on the screen. The real timer test
contains three subtests. 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:
Step 1: Select subtest 01 and the following message will appear:
Current date : XX-XX-XXXX
Current time : XX:XX:XX
Enter new date:
PRESS [ENTER] KEY TO EXIT TEST
Step 2: If the current date is not correct, input the correct date and press
Enter
. The date is updated and the following prompt will appear:
Enter new time :
Step 3: If the current time is not correct, input the correct time in 24-hour
format and press
Enter
. The time is updated.
The date and the time are displayed alternately by pressing
Enter
. To exit,
press Ctrl + Break .
Subtest 02 Backup Memory
This subtest checks the following backup memories:
Writes 1-bit of “on” data (01h through 80h) to address 0Eh through 7Fh
Writes 1-bit of “off” data (FEh through 7Fh) to address 0Eh through 7Fh
Writes the data pattern AAh and 55h to the address 0Eh to 7Fh
Then the subtest reads and compares this data with the original data.