A6 Power Supply Assembly; Supply Voltages - Agilent Technologies N9039A Service Manual

Troubleshooting

A6 Power Supply Assembly

A6 Power Supply Assembly

The A6 Power Supply assembly is serviced as an assembly only; no component
level repair is supported. For details on the functionality of this assembly see
Chapter 3, "Assembly
The A6 Power Supply has no user replaceable fuse. While there is a fuse internal
NOTE
to the supply this is not meant for field replacement. If the internal fuse is blown,
the power supply has experienced a major failure and should be replaced.
If the instrument will not boot up properly, or the display is not turning on, refer to
the Instrument Boot-Up Process section in this chapter before further A6 Power
Supply troubleshooting to rule out any other assembly as the cause of the failure.
While there are no test points or status LEDs accessible for troubleshooting on the
A6 Power Supply assembly, there are both test points and status LEDs for all of the
different power supply voltages, as well as other power supply status lines, on the
A7 Midplane Board assembly. See the A7 Midplane Board Assembly section in
this chapter for detailed information on the location of each.

Supply Voltages

The following voltage levels are produced by the A6 Power Supply assembly:
Table 2-2
62
Descriptions".
A6 Power Supply Voltages
Voltage Ground
Level Reference
+15V STBY ACOM
+5.1V STBY DCOM
+32V A ACOM
+15V A ACOM
+9V A ACOM
+5.1V A ACOM
Voltage Ground
Level Reference
+12V D DCOM
+5.1V D DCOM
+3.35V D DCOM
-15V A ACOM
-7V A ACOM
FAN POS FAN NEG
FAN NEG FAN POS
Chapter 2