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4. Internal DC Power checks.
64
b. If no DC voltages are present at the front panel, remove the top and
bottom covers.
c. Inspect the DC Power board (N5261-60002) connections.
d. Measure the +12 Vdc (red wires) on the DC Power board. If the +12 Vdc is
present, replace the DC power cable from the front panel (N5652-60001).
If the +12 Vdc is not present go to
e. Verify that the supply LED indicators on the Test Set Control Board
(N5261-60006) are on. If they are, replace the DC Power Board
(N5261-60002). Refer to
refer to
"Troubleshooting the Test Set" on page
a. Set the Standby switch to the Standby position.
b. Remove the top cover and connect the AC power cord. No fans or
DC power LEDs should be on.
c. Set the Power Switch to the on position. Both rear panel and
internal power supply fans should be operational.
d. Ensure the Controller board DC Supply indicator LEDs are on. If not,
suspect power supply (0950-4727) or front panel Standby switch.
Using a DVM measure the power supply terminal connections. Refer
to the label on the power supply for voltages on the terminals
screws.
Figure 2-13 on page
e. If the voltages on the power supply are correct, lift the Interface
board. If the Controller board DC Supply LEDs are on, disconnect
switches (J60 & J61) and amp cables (J10, 11, 12 and 14) to the
Interface board and re-install the board. If the indicator LEDs are on,
suspect the switch or amplifier. See
f. If the fan is not working and all Controller board DC Supply LEDs are
on, replace fan.
.
step 4
Figure 2-7 on page
56. If the LEDs are not off,
66.
Table 2-1
on
Keysight N5261/62A User's & Service Guide
63.
page
66.
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Table of Contents
Troubleshooting
