Service manual
When you run the hard disc formatter program, the
screen clears and the following information is displayed
(the figures given are typical for a 40MB hard disc):
HARD DISC FORMATTER
Format which drive (4-7)?
4
Drive 4 is an IDE drive
IDE drive ADFS:4 identifies itself as :
Description : <manufacturer's name,
model no.>
Firmware Version : <Version no.>
Configuration : < ? cyclinders, ?
heads and ? sectors/track>
This disc was last formatted using
the standard shape :
<manufacturer's name, model no.>
526 Cylinders, 4 Heads and 40
Sectors/Track
Parking cylinder 527, Initialisation
flag 1
Do you wish to use this shape (Y/N) ?
N
Do you wish to use the standard shape
for this drive (Y/N) ?
Y
A: no more changes
B: add defect by cylinder, head,
byte/sector
C: add defect by disc address
D: remove defect
A,B,C, or D ?
A
Disc will be formatted as
<manufacturer's name, model
no.> 526 Cylinders, 4 Heads and 40
Sectors/Track
Parking cylinder 527, Initialisation
flag 1
Format or just initialise the drive
(F/I) ?
I
Soak test the hard disc for defects
(Long/Short/None) ?
S
Are you SURE you want to do this to
drive ADFS:4 (Y/N) ?
Y
Verifying
Large file allocation unit?
512
Writing defect list
Creating map
Writing map
Writing root directory
Bytes free &02910800 = 43059200
Bytes Used &00007800 = 30720
PRESS <SPACE BAR> TO CONTINUE
After the tests
At the end of the functional test suite, we recommend
that you:
• perform the soak tests
• perform the safety tests
• retest the unit
See Figure 1-4: Procedure after repair overleaf for an
overview of this procedure.
Also, before returning the computer to the customer, you
must perform the following tasks using the procedures
described in this section:
• restore the CMOS RAM settings
• replace the customer's hard disc (if necessary)
• switch off the equipment
• disconnect the equipment
Performing soak tests
At the end of the test suite or individual test, we
recommend that you carry out a soak test on the UUT.
Once the soak test has finished, it is advisable to run the
full sequence of tests on the computer again before
returning it to the customer.
To perform a soak test, leave the unit under test
powered up for eight hours, or alternatively, overnight.
To run the soak tests, select option
A
from the main test
menu.
MENU VX.XX UN-DEF
(A) Test Suite
(B) Individual Tests
(C) Load / Save CMOS
(D) Quit
Select the test type of your choice
Select the 'A5000' option from the next menu and the
computer displays the following list of choices:
(A) A5000 1Mb Fun. Test
(B) A5000 1Mb Soak Test
(C) A5000 2Mb + HD Fun. Test
(D) A5000 2Mb + HD Soak Test
Press * to quit - for top menu
Select the soak test option that is correct for the
configuration of the machine.
Performing safety tests
Once you have proved that the UUT functions correctly,
you must perform the safety tests described in Appendix
C - Earth continuity testing and Appendix D - DC
insulation testing - class 1.
If either the earth continuity test or the DC insulation test
fails, take steps to fix the fault. if the problem lies with
the PSU, return it to an Acorn Authorised CSW for
repair.
Retesting the unit
On successful completion of the soak test, we
recommend that you retest the computer using the full
functional test suite.
Part 1- Fault diagnosis and repair Issue 1, November 1991 1-17