Power Supply Check; Check The Rear Panel Leds; Check The Post Regulator (A8) Leds - Agilent Technologies 8719ET Service Manual

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Power Supply Check

Power Supply Check

Check the Rear Panel LEDs

Switch on the analyzer and look directly at the rear panel. Notice the condition of the two
LEDs on the preregulator (A15). (See
• The upper (red) LED should be off.
• The lower (green) LED should be on.
Figure 4-3 A15 Preregulator LEDs

Check the Post Regulator (A8) LEDs

Remove the analyzer's top cover. Switch on the power. Inspect the green LEDs along the
top edge of the post-regulator (A8) assembly.
• All 9 green LEDs should be on.
• The fan should be audible.
In case of difficulty, refer to
4-14
Figure 4-3.)
Chapter 5 , "Power Supply Troubleshooting."
8719ET/20ET/22ET
8719ES/20ES/22ES
RF Network Analyzers
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