Agilent Technologies M1205A V24, Руководство по обслуживанию, Страница: 102 / 358

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___If power switch will not click on or will not stay depressed, then power switch assembly
is defective and should be replaced.
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If problems are not isolated from observing LEDs, keyboard lights, error codes, and so on,
then the next level of troubleshooting requires that you check each of the major
subassemblies. In the case of the CT model, the following checks assume power is applied to
the instrument and the power switch is on.
Remove the Front Housing to troubleshoot the unit and check the following:
Check power supply LEDs.
___
All three green LEDs should be on with power applied.
___
For the CT model, if one or more of the LEDs are not illuminated see “Blown Fuses
(Model V24CT/V26CT)” on page 11.
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SDN Functionality LED Should be OFF when operating properly.
If ON, indicates reset error in SDN cir-
cuitry
Replace System Board if LED is
ON.
(If you have the SDN Daughter
Board, refer to Appendix A.)
Application Processor LED Should BLINK on and off when operat-
ing properly.
If ON continually, indicates system
error.
If slow blink (every 2 seconds) indicates
System Board is resetting
Replace System Board if LED is
ON.
Utility Processor LED Should BLINK on and off when operat-
ing properly.
If ON continually, indicates system
error.
If slow blink (every 2 seconds) indicates
System Board is resetting
Replace System Board if LED is
ON.
All 3 LEDs If all 3 LEDs are off, indicates no power
to the System Board Check power supply and cabling.
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