HP 3490A - Page 152

Monitor
A2Ol
pin
3
lO
t7
with scope
(lnt.
SYnc'
ov
1--t==-
-'l
6oms
l.-
-r7vl
Monitor
A1U401
pin
17
with
s@pe
(lnt.
Sync.
Slope).
Correct
Wavelorm:
-*
4V1
--l
OomsF-
assdüly.
Se
Par. 7-14.
Troubleshoot
DC
Translaror
A'1O411
ls\
E volbge
t€gt?
NO
retion
(white
En
A6 and
42.
.
iE
S
b*-$r
I
,l
-l
|
:a-:'
dth
s@F.
Corred Mveform: 5. lf
the AC
Conwrter operation is
out
of specitications
only
at certain
frequencies, refer
to the
bble of Frequency-Related
Accuaacy
problems.
6.
Pin
18
indi6t6
ths rewrse
&velorm-
+6Vto+7V
'6Vto-7v
t--
!
io!
dipped ar
prope
levels,
troubteshoor
A6CB5-12,
.'=
I r,3- ::
A6TP3 wirh
3@pe-
Should
be +
2 V to
+ 2.5
V.
F
i
-.::
s6,
troubleshoot
A6CR16-.19,
A6R4O.
Figure
7-6.
AC
Converter
Troubleshootins
Tree.
Apply 1 V input at 100
on
1V
range. Jumper
AOTPI to
46 shield
Jumper top end
of A6R
to
A6 shield. Monitor
lower
end
of
AGCRl 3.
Correct waveform:
Monitor left end ot
A6C
with
scope
(line
sync)
Connect right end
ol
I kf,l to
+
and
,5
V.
Volt.
age
should
be >
-
15
with
+5V
in, a
>+15Vwith-5Vin-
Troublesh@t 4604, 05,
and 06.
@nfirming
that
@ch is
tomard
biased by
checking dc wltag6
shown
on schemlic Figwe
7-29.
S@ Note
4.
Tro
ub
leshoot 46U3,
A602, and A603.
Se
Note 4.
7-1s
17-t6
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