HP 480-0005-00-15 - Manual (Page 145)

P/N 480-0005-00-15 8-5
Chapter 8: Diagnostics/Maintenance
Inspect and Replace Fuse (for AC power only)
NOTE: The procedure which follows should only be completed by a trained technician.
If the unit does not power up and you cannot diagnose any other problems, you can check the fuse continuity
with the instructions which follow. You will need the following:
• Ohm meter
• Small Flat Blade Screwdriver
• New Fuse, if necessary. Contact Quintum for ordering information.
NOTE: Ensure the power switch is in the Off position.
1. Unplug the AC Cord from the chassis and the wall outlet.
2. Access the fuse cover tab on the outside edge of the AC inlet (there is a red indicator).
3. Using a small flat blade screwdriver, insert it in the fuse cover tab and gently twist. The fuse cover should
easily dislodge.
4. Gently pull the fuse cover open until it is perpendicular to the AC inlet.
5. Insert the screwdriver into the red fuse holder tab and twist. The red fuse holder should dislodge easily and
move a small distance away (you can use your fingers to pull it the rest of the way).
6. Use the Ohm meter to check the continuity of the fuse in the holder. For a good fuse, the Ohm meter
should indicate a value that is less than ten (10) Ohms. If it reads several Kilo-Ohms or higher, the fuse is
bad and must be replaced.
7. Install the new fuse (if necessary) in the red fuse holder and follow steps 8-10.
8. Slide the fuse holder back into place and press firmly into its original position. The red fuse holder is
keyed such that is cannot be installed improperly.
9. Close the fuse cover and ensure it is flush with the outer edge of the AC inlet and the red fuse holder is vis-
ible through the fuse cover window.
10. Plug the AC power cord back into the rear of Tenor CMS chassis and the AC outlet.
11. Confirm operation by turning on the CMS power switch.