Power Supply Theory Of Operation - Keysight n9020a Service Manual

Mxa signal analyzer

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Table of Contents

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 signal analyzer. 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 ~120 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

all of the different power supply voltages, as well as other power supply status

lines, on the A7 Midplane Board assembly. See the

Supply Voltages

The following voltage levels are produced by the A6 Power Supply assembly:

for detailed information on the location of each

"A7 Midplane Description"

X seriesN9020a