5. Check the A30 Front Keyboard
The A30 front keyboard can be checked using the external test 50: FRONT PANEL DIAG.
a.
Press
4
PRESET
5
,
4
SYSTEM
5
,
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
SERVICE MENU
,
NNNNNNNNNNNNNNNNN
TESTS
,
4
5
5
,
4
0
5
,
4
x1
5
,
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
EXECUTE TEST
to run the
external test 17.
b. Press all of the front panel keys. The pressed abbreviated key name should be displayed at
a key pressed. When you rotate the RPG knob, the RPG tuned direction (CW or CCW) and
its response speed (SLOW, MID,FAST) should be displayed. So you can check every key on
the A30 Keyboard except for
4
PRESET
5
. (If you want to exit this test, press
4
PRESET
5
.)
If one or more keys seems to be defective, replace the A30 front keyboard.
If all keys seem to be good, the A30 front keyboard is veried. Continue with the next
Check the A53 FDD
.
6. Check the A53 FDD
The A53 FDD (Flexible Disk Drive) can be checked using the external test 51: DSK DR FALUT
ISOL'N.
a. Press
4
PRESET
5
,
4
SYSTEM
5
,
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
SERVICE MENU
,
NNNNNNNNNNNNNNNNN
TESTS
,
4
5
5
,
4
1
5
,
4
x1
5
,
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
EXECUTE TEST
to run the
external test 51.
b. As the analyzer instructs, insert a exible disk into FDD. Use a formatted but blank exible
disk, otherwise the data on the disk will be overwritten by this test. Then press
NNNNNNNNNNNNNN
CONT
.
c. Check the test result, PASS or FAIL, that is displayed at the end of the test.
If this test fails, replace the A53 FDD.
7. Check the A32 I-BASIC Interface and the mini DIN Keyboard
The mini DIN external keyboard is connected to the A32 I-B
ASIC I/O connector, and is used to
develop programs.
If the external keyboard of the I-Basic is not working, perform the following procedure to
verify the keyboard.
Press
4
PRESET
5
,
4
SYSTEM
5
,
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
SERVICE MENU
,
NNNNNNNNNNNNNNNNN
TESTS
,
4
1
5
,
4
x1
5
,
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
EXECUTE TEST
to run the internal
test 1: A1 CPU.
If the internal test 1 passes, the HP driver circuit on the A1 CPU is probably working.
Inspect cables between the external keyboard and the A1 CPU through the A32 I-BASIC
interface. If the cable is good, replace the external keyboard.
If the internal test 1 fails, replace the A1 CPU.
8. Check the A33 EXT I/O Interface
The A33 EXT I/O interface is used to control the external instrument like the
printer/scanner/handler.
If the external instrument is not working, perform the following procedure to verify the EXT
I/O interface.
Press
4
PRESET
5
,
4
SYSTEM
5
,
N
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
SERVICE MENU
,
N
NNNNNNNNNNNNNNNN
TESTS
,
4
5
5
,
4
2
5
,
4
x1
5
,
N
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
EXECUTE TEST
to run the
internal test 52: 24 BIT I/O PORT.
Digital Control Troubleshooting 8-9
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