Fluke 8506A Instruction Manual page 245

NOTE
The
instrument
must be connected
through a bus
network
to
a system
controller
,
e.g.,
the
Tektronix
4051
or
HP
9825,
to operate.
This troubleshooting procedure
is
based
on
the assumption that the instrument has been
checked
in local
and found
to be operational
in
all
aspects prior to
installation
of the Bit
Serial
interface.
Install
the Bit
Serial
Interface
in
the instrument and
apply
power from
the front panel switch.
Go
to the step
number
given
for correct
Is
the
display
blank? 4 7
Check
the address
lines
and
address decoders.
Check
for
a
high
ACK
line.
Repair
as
required
and resume
at step 2.
If
the display
is
incorrect (garbled or
wrong), check the input ID
lines
and
gates.
Repair
as
required
and resume
at
step
2.
Using the controller, instruct
the instrument to go
to
remote (program
the character "J").
Does
the instrument go into
remote?
Check
the input
gates
(TP1), the
UART
(U9), the
baud
rate at
TPS,
the
IWT
circuit,
and
the
status
output
buffer.
Program
several
instructions
from the remote
controller.
10
I
9
Does
the
instrument respond
correctly to the
programmed
instructions?
13 12
Check
the
UART
(U9), the
output
gates
(U4),
and
the data
input gate (U7). Repair
as
required
and resume
at step 10.
Troubleshooting of the Bit
Serial Interface, as applicable at this
level,
is
complete.
606-5