Service manual
Service Manual
3 Select the A500 option from the next menu which will
configure the CMOS RAM for the selected computer. If
only one option exists in the A500 series then the
software will automatically select that option. If there is
more than one option then a second menu will be
displayed. Select the required option (eg
A54 0
Dealer Acceptance Test).
If the test type is not
found in the test data file then a test type menu will be
displayed.
4 A list of settings will then appear on the screen. These
are the test configuration modules read from the test
data file and then set up in the CMOS.
Note the following at this stage:
• memory size
• printer type
• mouse type.
Battery backed RAM
The test continues by testing battery backed RAM. The
following is displayed on the screen:
CMOS RAM test Vx.xx DEALER
Copied CMOS RAM into main memory.
Passed CMOS RAM Configuration.
Passed Read - Write function.
Copied CMOS RAM from main memory.
Passed CMOS RAM Verification Test
THIS SUB TEST HAS PASSED
PRESS <SPACE BAR> TO CONTINUE
Press the space bar to continue the test.
During the Read - Write function test of the CMOS RAM
you will be requested to enter the file name for the CMOS
data file that should be used for this test. This file
contains some of the CMOS data, and will change with
different configurations of unit (ie SCSI fitted etc). You
should press Return to use the default data file. If you
need to use a specific file, not the default, then enter the
path and filename of the data file to be used (this is the
one you created in the section entitled Creating a CMOS
test data file on page 4-6).
Action if the test fails: Check batteries, battery holders
and connections. Re-run the test. Check the CMOS test
data file is correct (see the section entitled Creating a
CMOS test data file on page 4-6). If the test still fails,
either change the main PCB, or see Part 5 - Main PCB
fault diagnosis.
Note: If this test fails you can not rely on the results of the
remaining tests. This is because the CMOS RAM is used
to control the test sequence and store the results.
Memory test
The screen will clear and the following menu will be
displayed:
Memory Test Vx.xx DEALER
Amount of Memory 4 Mbytes
Running four phase memory test.
Lower memory limit &00008934
Upper memory limit &00332790
Phase one : incrementing pattern....
Phase two : Cycling bits ..............
Phase three : TRUE Hierarchy ..........
Phase four : FALSE Hierarchy ..........
PASSED......
PRESS <SPACE BAR> to continue
You should check that the amount of memory displayed
is the same as that you made a note of at the end of the
section entitled Run the tests on page 4-7.
Press the space bar when prompted at the end of the
test. The data file for the A540 test can be modified to
only execute a two phase test.
Note: The Upper and Lower memory limit can vary
slightly between releases of the test software, hence
approximate values are given.
Real Time test
The screen will clear and the following menu will be
displayed:
TIME TEST Vx.xx DEALER
1) CHECK THE DATE AND TIME
2) SET THE DATE AND TIME
3) CHECK THEN SET THE DATE AND TIME
Please select the required option ?
The normal procedure is to select option 1. If you want to
reset the time or date you would select 2 or 3. For
example, you can:
• type 1 to check the date and time
• check that the time is correct and the seconds are
incrementing correctly.
Then either press F5 (if correct) or F8 (if not correct), and
then press the space bar to continue.
Com ptype
The test continues by running a comparison check
between the test data file and what is fitted to the
computer. The screen will clear and the following will be
displayed:
COMPUTER TYPE TEST V x.xx DEALER
PASSED CPU version matches
PASSED MEMC version matches
PASSED OS version matches
PASSED Memory size matches
4-8 Issue 2, June 1991 Part 4 - Fault diagnosis