Service manual

Creating a test IDE hard disc
To avoid overwriting the customer's hard disc during
testing, prepare a test hard disc. You will need the
following equipment:
• IDE hard disc to be initialised (UUT)
• A5000 test disc (Acorn part number 0292,824)
• A5000 series test station, which is made up of an
A5000 series computer with the hard disc removed
and a keyboard attached (do not use a customer's
computer for this test)
• Standard RGB colour monitor (Analogue RGB) and
cable.
Notes:
1 Throughout the test procedure make sure that the
power is the last connection made before a test
commences, and the first connection removed when a
test is complete.
2 The mains supply voltage must be within the rated
voltage range as indicated on the PSU input label.
3 If a message is expected and has not appeared within
30 seconds then record the fault and repair the
machine. If an error message appears, record the
fault and, if possible, continue the test and then repair
the machine.
4 If the test equipment fails three consecutive UUT's for
the same fault, validate the equipment using a known
good UUT and repair as necessary before continuing
with the test.
The procedure to test an IDE hard disc is given below.
1 Insert the UUT into the test station, taking care to plug
the two cables in correctly. Replace the A5000's top
cover.
2 Connect the test station and the monitor to the mains
supply. Do not turn on.
3 Insert the test disc into the floppy disc drive.
4 Turn on the monitor.
5 Turn on the test station whilst holding down the Delete
key, Shift key and * key (until the auto-boot file is
executed). Use the * key on the numeric keypad not
the * key on shift 8.
6 The following menu is displayed:
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 Individual Test option by typing B .
7 The following menu appears on the screen:
Individual Tests
(A) Exp-Cards
(B) Pcb-Module
Select the Pcb-Module option B .
8 From the list that follows, select the option Format
IDE drive 4 by pressing 0. A configuration screen
will then appear which will be followed by the
formatter screen. The disc is then formatted. For
details of the hard disc formatter program, refer to the
information given in the section entitled Hard disc
formatter on page 1-16.
9 When formatting, and initialising is complete, you will
be asked to press the space bar to continue. This
produces the report screen that displays the pass/fail
message.
10 Press the space bar and, when requested, turn off
the test station.
11 Turn all the mains supplies to the equipment off.
12 Disconnect the UUT, from all associated equipment,
in reverse order to that detailed earlier in this
procedure.
If any fail messages have occurred, the UUT must be
sent for repair and retested.
The hard disc is now ready to be inserted in the
customer's computer to test the computer system.
Replacing the customer's hard disc
WARNING:
IT IS NECESSARY TO REPLACE THE CUSTOMER'S
HARD DISC BEFORE RUNNING THE TEST SUITE, AS
RUNNING THE HARD DISC TESTS MAY DESTROY THE
DATA HELD ON THE DISC.
To ensure that the customer's hard disc is not
overwritten during the test, disconnect the fitted hard
disc and place it in a safe place. Connect and secure
the test IDE hard disc into the computer (see the above
section entitled Creating a test IDE hard disc).
Connecting the customer's equipment
Connect the customer's equipment in the following order:
1 keyboard to front panel connector
2 serial port loopback plug to the RS232 port
3 printer to the video loopback box printer connector
4 headphones to the Headphones 32 Ohm socket
5 parallel to video loopback box between the parallel
port and video socket
6 multi-sync analogue RGB monitor to the parallel to
video loopback box video socket
7 monitor to the mains supply (do not switch on yet)
8 computer to the mains supply (do not switch on yet).
1-6 Issue 1, November 1991 Part 1- Fault diagnosis and repair