4-8
Service Guide E8364-90026
Troubleshooting
PNA Series Microwave Network Analyzers
Power Up Troubleshooting
E8362B, E8363B, E8364B
Measure the Individual Voltage Supplies
WARNING
The instrument contains potentially hazardous voltages. Refer to the
safety symbols provided on the instrument and in
before operating the unit with the cover
removed. Make sure that the safety instructions are strictly followed.
Failure to do so can result in personal injury or loss of life.
To measure the power supply voltages, it is necessary to remove the instrument’s outer
and inner covers. Refer to
“Removing the Covers” on page 7-6
for removal procedures. Use
the E8356-60021 extender board to measure the individual power supply voltages. Insert
the extender board into an empty slot next to the A6 signal processing ADC module
(SPAM) board.
NOTE
If any one individual voltage supply from the A4 power supply develops an
over-voltage or over-current problem, all supplies are affected. The supply
goes into a “burp” mode characterized by the supplies cycling on and off at a
low voltage level. The cause of the over-voltage or over-current condition can
be the A4 power supply itself, or any assembly to which the A4 power supply
provides voltage. To isolate the cause of “burp” mode, continue to the
assembly removal process as described in the section titled
Voltages Are Missing” on page 4-10
.
On the extender board, measure the power supply voltages using a digital voltmeter. Refer
to
for the power supply test points on the extender board. Use the point marked
as “GND” for the ground connection. Refer to
for the correct voltages.
Summary of Contents for E8362B
Page 11: ...Service Guide E8364 90026 1 1 1 Safety and Regulatory Information ...
Page 19: ...Service Guide E8364 90026 2 1 2 General Product Information ...
Page 33: ...Service Guide E8364 90026 3 1 3 Tests and Adjustments ...
Page 83: ...Service Guide E8364 90026 4 1 4 Troubleshooting ...
Page 151: ...Service Guide E8364 90026 5 1 5 Theory of Operation ...
Page 185: ...Service Guide E8364 90026 6 1 6 Replaceable Parts ...
Page 269: ...Service Guide E8364 90026 7 1 7 Repair and Replacement Procedures ...
Page 351: ...Service Guide E8364 90026 8 1 8 General Purpose Maintenance Procedures ...