Service Guide E8364-90038 4-9
PNA Series Microwave Network Analyzers Troubleshooting
E8362C, E8363C, E8364C Power Up Troubleshooting
If All Supply Voltages Are Present
If all of the supplies have measured within tolerances, and the instrument still is not functioning properly,
refer to “Rear Panel Troubleshooting” on page 4-17.
If All Supply Voltages Are Missing
WARNING Disconnect the line-power cord before removing any assembly. Procedures described in
this document may be performed with power supplied to the product while protective
covers are removed. Energy available at many points may, if contacted, result in personal
injury or loss of life.
It is necessary to sequentially remove all of the assemblies, taking care to disconnect the line-power cord
before each removal, and then to measure the supply voltages after each removal.
If the missing supply voltages return to a “power on” condition after removal of an assembly, suspect that
assembly as being defective.
Remove the network analyzer assemblies in the order specified in the following steps (refer to Chapter 7 for
removal instructions).
1. Unplug the test set motherboard cable from the A16 test set motherboard. Refer to “Removing and
Replacing the A16 Test Set Motherboard” on page 7-32.
2. Unplug the front panel interface cable from the A3 front panel interface board. Refer to “Removing and
Replacing the Front Panel Assembly” on page 7-10.
3. Remove the A6 SPAM board. Refer to “Removing and Replacing the A6, A8, A9, and A10 Boards” on
page 7-18.
Table 4-1 Extender Board Measurement Points
Measurement
Location
Signal
Description
Test E q uipme nt U s ed
1
Expected Level
(Vdc)
Approximate
Resistance (W)
A +5V power supply DMM +5.0 285
B -15V power supply DMM 15.0 12.7 k
C -5V power supply DMM 5.0 7.2 k
D +9V power supply DMM +9.0 4.0 k
E +15V power supply DMM +15.0 3.0 k
F +15V power supply DMM +15.0 2.8 k
G +22V power supply DMM +22.0 890
H +32V power supply DMM +32.0 2.6 k
1. DMM = Digital multi-meter
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