Troubleshoot The Fan; Perform The Self Test - Agilent Technologies E4915A Service Manual

g. If these are good, the power supply is veri ed.
h. Reconnect the cable assembly to the power supply.

4. Troubleshoot the Fan

Perform the following procedure if the fan is not rotating.
Troubleshoot the Fan
a. Turn the E4915A/E4916A power o .
b. Remove the outer cover of the E4915A/E4916A.
c. Remove the fan power cable from the A1J15.
d. Turn the E4915A/E4916A power on.
e. Check the output voltage of the fan power at A1J15 (+24 V
f. If the output voltage is good, replace the fan.

5. Perform the Self Test

1. Turn the E4915A/E4916A power on and wait until the measurement mode and other
information are displayed.
2. Press
Blue System
4 5 4 5
*) (+
3. Press or
4 5 4
4. Press
NNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Self Test softkey.
*)
5. Select YES using
4
If an error message appears on the LCD, replace the A1 Main Board.
3-4 Troubleshooting
.
several times until Self Test is displayed at the lower right of the LCD.
5
(+
or key and press
5 4 5
6
10%).
.
Enter
4 5