Keysight Technologies X Series Service Manual page 43

Boot Up and Initialization
Potential Problems During Boot Process
Figure 2-3 DS311 +3.35 VDF LED
5. Remove the 4 screws attaching the front frame assembly to the chassis
6. Referring to
Keysight CXG, EXG, and MXG X-Series Signal Generators Service Guide
Is DS311 on (green)?
a. If DS311 is not on go to
why the +3.35 VDF is not turning on.
b. If DS311 is on proceed to
and tilt it down so that you have access to the rear of the A6A1 Front Panel
Interface board assembly.
Figure 2-2, verify the power on LED drive voltage on pin 3 of
J6 on the A6A1 Front Panel Interface board measures approximately +2.1
VDC.
Is the voltage on pin 3 of J6 +2.1 VDC ±0.3 V?
a. If yes, the problem is most likely the A6A3 Power Switch Assembly.
b. If not, the problem is most likely the A6A1 Front Panel Interface
assembly or the W1 Ribbon Cable from the A3 RF Assembly to the
A6A1 Front Panel Interface assembly.
Chapter 8, "Power Supply"
step 5.
to determine
43