Service manual
Model 5304
A
Maintenance
performance checks indicate
a
malfunction
or if
instrument operation
is
suspect, perform
the
Self-
Check procedures
in
Table 9D-5-1.
For
further tests,
separate
the
5304A from
the
casting
and
reconnect
to
5300A using Paragraph 9D-5-6 steps
a to e as
a
guide. Operating procedures
in
Subsection
9D-3
can be
used
to
help understand operation.
To
test
the
5304A, obtain
the
test equipment listed
in
Table
5-1 of the
5300A portion
of the
manual.
9D-5-15. Figure 9D-5-2
to
Figure 9D-5-6
are
trouble-
shooting flow diagrams
for
each
of the
five modes
of
operation. Signal flow
is
outlined
for
each mode
and
waveform test points
and
voltage test points
are
indicated.
The
waveforms
or
voltage level
for
each mode
is
included with
the
figures.
To
obtain
the
waveforms and/or levels
for
each mode,
follow
the
directions
for
instrument connections
which
are
listed with
the
troubleshooting flow
dia-
grams
of
each respective mode.
9D-5-16.
DC
BALANCE ADJUSTMENT
9D-5-17.
If
Channel
A or
Channel
B
fail
to
oper-
ate
with their respective LEVEL controls
in
PSET
position when measuring sine wave signals,
or
when
periodic maintenance/calibration
is
performed,
the
dc
balance
may be
adjusted
as
follows:
a.
Connect
an HP 651B
Oscillator,
set to 10
MHz, 50 mV
rms/5012, through
a 50 OHM BNC
Feed-
thru Termination,
to
Channel
A
input.
b. Set the
5304
A
controls
as
follows;
ATTEN
to XI
(both channels).
AC-DC
to AC
(both channels).
+, - to +
(both channels).
LEVEL
to
PSET (both channels).
SEP-CHK
to SEP
"Function"
to
FREQ
A,
AUTO
c.
Connect
an HP 180A
oscilloscope through
a 10 Mi) pi obe to
U18(6).
d.
Adjust
the
oscilloscope controls
to
monitor
a
useable signal.
e.
Adjust A1R20
for a
symmetrical waveform
with minimum
or no
change
in
duty-cycle when
SLOPE switch
is
changed from
+ to - and
minimum
or no
change when AC-DC switch
is set to AC
or DC.
f.
Connect
the
oscilloscope probe
to
U18(8)
and the 651B
input signal
to
Channel
B.
g.
Adjust
A1R19 for a
similar display observed
in
step
e.
9D-5-3