Keysight Technologies N9040B UXA Signal Analyzer Service Guide 225
Power Supply/Midplane Troubleshooting
A6 Power Supply Description
Power Supply Theory of Operation
The A6 Power Supply assembly is serviced as an assembly only; no component
level repair is supported.
The A6 Power Supply assembly provides most all of the necessary DC voltages
for the UXA. If any of the power supplies are not within their operating
voltages, the instrument will not function properly.
The A6 Power Supply assembly is a switching supply that operates at a
frequency of ~130 kHz.
The A6 Power Supply assembly is an auto ranging supply, requiring no user
selection of the input voltage. The input AC voltage and frequency
requirements for the A6 Power Supply assembly are printed on the rear panel
of the instruments as well as on the power supply itself.
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
some of the different power supply voltages on the A7 Midplane Board
assembly. See the “A7 Midplane Board Assembly Description” on page 230 for
detailed information on the location of each
Supply Voltages
The following voltage levels are produced by the A6 Power Supply assembly:
Supply Name Description Referenced To
+32VA +32 Volt Analog Supply ACOM
+15VA +15 Volt Analog Supply ACOM
+15VSB +15 Volt Standby Supply ACOM
+9VA +9 Volt Analog Supply ACOM
+5.2VA +5.1 Volt Analog Supply ACOM
-7VA -7 Volt Analog Supply ACOM
-15VA -15 Volt Analog Supply ACOM
+12VD +12 Volt Digital Supply DCOM
+5.1VD +5.1 Volt Digital Supply DCOM
+5.1VSB +5.1 Volt Standby Supply DCOM
+3.35VD +3.35 Volt Digital Supply DCOM
FAN_P Fan Positive Supply FAN_N
FAN_N Fan Negative Supply FAN_P
To Next Page
Loading...
Need help?
General
