Check
10,
DC-DC
Converter
Input
V
oltage
1.
Turn
on
the
4338B .
2.
Using
a
multimeter
,
check
if
the
voltage
between
\DC
OUT"
test
pad
and
TP500
(DC-DC
Converter
input
voltage)
is
between
12
V
and
15
Vdc
.
Refer
to
Figure
4-13
for
test
pad
and
pin
locations
.
3.
If
the
voltage
is
in
range
,
proceed
to
the
\Check
11,
DC-DC
Converter
Open
Output
V
oltages",
otherwise
proceed
to
the
\Check
12,
Transformer
Secondary
V
oltage
".
Figure
4-13.
T
est
Pin
Locations
T
roubleshooting
4-17
