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Service Information
Troubleshooting the Test Set
For assistance refer to
on page
If the test set is not operating properly, use the following procedures to aid in
isolating the problem. Refer to the
starting on
Troubleshooting, DC Level
Power Supply and Fans
1. Verify the front panel Standby switch is operational.
2. AC Line voltage checks.
3. External DC Power checks.
Figure 2-12
Front Panel Millimeter Module DC Power Connector
Pin 1 (+12V)
Pin 6 (gnd)
Keysight N5261/62A User's & Service Guide
"Keysight Support, Services, and Assistance"
92.
page
51.
a. The rear panel fan and front panel DC Power LEDs should be on
when the Standby switch is in the on position.
a. Ensure the proper AC line voltage is present at the instrument line
cord.
b. Remove the AC power cord from the instrument. Check the
instrument AC line module 5 amp fuse, as shown in
page
11.
c. Remove the instrument bottom cover. Near the rear panel are two
fuse holders, remove the 8 amp fuses and verify that they are
operational. See
Figure 2-11 on page
a.
Verify DC voltage levels on each of the front panel DC power
connectors. Pins 1 & 3 = +12 V (± 0.8 V), Pins 4 & 6 = ground
1
6
"Test Set Diagrams and Graphics"
59.
2
Pin 3 (+12V)
3
7
Pin 4 (gnd)
4
5
Figure 1-7 on
63
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Table of Contents
Troubleshooting
