Fluke 9000A-Z80QT Instruction Manual page 59

If the result of a self test,
timeout
message, the pod
inoperative pod as described
Pod. Select a suitable UUT as described
Pod Testing.
pod timeout
The
lines which can disable the
during
mainframe setup
manual.
5-7.
Selecting a
order
troubleshoot
In
to
ribbon
pod via the
normally employs a Z80 microprocessor and to which power can easily be
applied. The UUT
testmg:
RAM
0
and ROM for performing
0 Z80 compatible clock signal to drive the pod
0
dc UUT power
+5V
of
Instead connection to a known-good UUT, the
connected to the self test socket on the pod. The self test socket provides a Z80
be
compatible clock signal,
order
address lines back to the
high
details).
However, insertion of the
at ground. The pod senses the
29
places pin
of
the self test connection. As a result, the mainframe inhibits normal
mainframe
and only allows self testing.
operation
troubleshooting
During
pod
allowed. Consequently, the pod must be prevented from sensing the ribbon
in the self test socket.
cable connector
test connection, pin
effectively remove pin
To
and modify it as follows:
connector
Remove pin
1.
any other mainframe
or
considered to be inoperative. Troubleshoot an
is
under
the heading Troubleshooting an Inoperative
0
N
message can also
pod.
procedures
Pod Testing
for
UUT
a pod, a known-good UUT must be connected
cable and connector. The UUT may be any device which
needed to provide the following functions during pod
is
check the UUT power sensing circuit
to
dc, and also simulates ROM by connecting the
+SV
data
ribbon
cable connector
procedures, normal mainframe operation must
To
of the connector must
29
of connector, obtain
the
29
from the IC socket.
29
operation
under
the
heading
TE
result from
stuck UUT
Forcing lines can be disabled
as described in the mainframe
write
read/ operations
ribbon
cable connector may
lines (refer to the schematic diagram for
into
directly
ground at pin
from
prevent the pod
effectively removed.
be
a 40-pin IC socket or
Z$OQT
produces a pod
Selecting a UUT for
forcing
to the
the self test socket
and notifies the
29
be
sensing the self
5-7