4-10
Service Guide E8364-90038
Troubleshooting
PNA Series Microwave Network Analyzers
Power Up Troubleshooting
E8362C, E8363C, E8364C
4. Remove the A8 fractional-N synthesizer board. Refer to Refer to
“Removing and Replacing the A6, A8,
A9, and A10 Boards” on page 7-18
.
5. Remove the A9 fractional-N synthesizer board (option 080). Refer to
“Removing and Replacing the A6,
A8, A9, and A10 Boards” on page 7-18
.
6. Remove the A10 frequency reference board. Refer to
“Removing and Replacing the A6, A8, A9, and A10
Boards” on page 7-18
.
7. Remove the A11 phase lock board. Refer to
“Removing and Replacing the A11 Phase Lock Board” on
page 7-20
.
8. Unplug the A31 hard disk drive from the A15 CPU board. Refer to
“Removing and Replacing the A41 Hard
Disk Drive (HDD)” on page 7-62
.
The minimum required assemblies to power up the analyzer are:
•
A4 power supply
•
A14 system motherboard
•
A15 CPU board
To further isolate the failure in the three remaining assemblies, measure the resistance on the extender
board (with the power turned off) from the power supply test points to “GND”. Refer to
Figure 4-2 on
page 4-8
for the location of the measurement points. The resistances should be as shown in
Table 4-1 on
page 4-9
.
NOTE
Make sure that the only assemblies plugged in are the three minimum required assemblies
listed above.
Check for shorts (zero
) or very low resistance (approximately 1
). If a short or low resistance is
measured, isolate each of the remaining three boards in the following order, and recheck the shorted test
point after each board is removed. Note that the resistance may be different from that listed in the table, but
you should be able to determine if the shorted condition has changed.
Isolate the remaining three assemblies:
•
remove the A15 CPU board
•
remove the A4 power supply
•
This leaves only the A14 system motherboard installed. If the measurements are still incorrect, this is
the suspected faulty assembly.
Summary of Contents for E8362C
Page 11: ...Service Guide E8364 90038 1 1 1 Safety and Regulatory Information ...
Page 21: ...Service Guide E8364 90038 2 1 2 General Product Information ...
Page 33: ...Service Guide E8364 90038 3 1 3 Tests and Adjustments ...
Page 81: ...Service Guide E8364 90038 4 1 4 Troubleshooting ...
Page 137: ...Service Guide E8364 90038 5 1 5 Theory of Operation ...
Page 171: ...Service Guide E8364 90038 6 1 6 Replaceable Parts ...
Page 257: ...Service Guide E8364 90038 7 1 7 Repair and Replacement Procedures ...
Page 341: ...Service Guide E8364 90038 8 1 8 General Purpose Maintenance Procedures ...