HP 8340b - Assembly Isolation

ASSEMBLY ISOLATION
To
help
verify
that
a
problem
is
on
the
A59
assembly, remove
the
assembly and observe
the instru¬
ment.
With
the
ASS
assembly
removed,
you
should
see
the
following:
1.
Following
power
on or
instrument
preset,
both
instrument
check
LEDs
should
go
off.
2.
All
16
self
test
LEDs
on
the
A60
processor assembly
should
go
off.
3.
Turn
the
line
switch
to
standby,
and
then
on.
The
instrument
should
preset
rather than
restoring
the
prior
state.
4.
Verify
that
the:
OVEN
annunciator
is
on
EXT REF is
annunciator
is
off
UNLOCKED
annunciator
is
off
SRQ
annunciator
is
off
REMOTE
annunciator
is
off
F-12
A59
Digital
Interface
Assembly-Level Troubleshooting
HP 8340B/41B