Power Supply; Checktherearpanelleds; Checkthea8Postregulatorleds - Agilent Technologies HP 8719D Service Manual

Power Supply

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 Al5 preregulator. (See F'igure 4-4.)
The upper (red) LED should be off.
q
The lower (green) LED should be on.
q
Check the A8 Post Regulator LEDs
Remove the analyzer's top cover. Switch on the power. Inspect the green LEDs
along the top edge of the
All green LEDs should be on.
q
q
In case of diflhlty, refer to Chapter 5, "Power Supply Troubleshooting."
R E D L E D
NORMALLY OFF
Figure 4-4. Al5 PremguIator LEDs
post-regulator assembly.
GREEN LED L I N E V O L T A G E
NORMALLY ON S E L E C T O R S W I T C H
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