Agilent Technologies 4339B - Using Front Panel Keys and Basic Operations

Check
12, DC-DC
Converter Open
Output V
oltages
1.
Turn o
the
4339B
.
2.
Disconnect the
DC-DC
Converter
Output
Cable
shown
in
Figure
4-13
from
connector
\J12"
on
the A1
Main
Board
Assembly
.
3.
Turn the
4339B on.
4.
Using
a
multimeter
,
check
if
the
DC-DC
Converter
open
output
voltages
on
the output
connector
pins
shown
in
Figure
4-13
are
in
the
ranges
shown
in
T
able
4-2
.
5.
If
passed,
replace
the
A1
Main
Board
Assembly
,
otherwise
replace
the
DC-DC
Converter
Assembly
.
Figure 4-13. DC-DC Converter Output Connector
Table 4-2. DC-DC Converter Open Output V
oltages
Pin (+) Pin (
0 )V
oltage
Range
1 2 5.1 6 0.2 V
4 3 12 6 0.6 V
5 3 0 12 6 0.6 V
Troubleshooting 4-17