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Reference Information, cont’d
CrossPoint Matrix Switchers • Reference InformationB-6
If you choose to check for proper operation before putting the cover back
on, ensure that tools and hands are outside the switcher and then perform
step 11. After recognizing the new IC, the switcher should power up
normally. Unplug the AC power cord, and reinstall the switcher.
11. Reinitialize the switcher to recognize the new IC as follows:
a. Connect the power cord to the AC power source.
b. Press and hold the Enter button while you connect the power cord to the
switcher.
c. Observe that the Input, Output, Preset, View, and Esc LEDs all flash.
d. Release the Enter button.
12. Ensure that the switcher is working properly.
13. If the switcher was removed from a rack, remove its power cord, reattach the
switcher to the rack, and reconnect the power cord.
14. Reconnect the input and output cables.
Replacing the AC fuse (CrossPoint 84, 88, 124, and 128 only)
The AC fuse on the power supply board is a user-replaceable component of the
CrossPoint 84, 88, 124, and 128. To replace the AC fuse, do the following:
1. Follow the instructions in Opening the CrossPoint 84, 88, 124, and 128 on page
B-2 to remove the top cover.
2. Locate the fuse on the power supply board (see figure B-1), and remove it
from its retaining clips.
3. If test equipment is available, you can check the fuse.
4. Place a new 2A/250V fast-blow fuse in the retaining clips.
5. Reinstall the switcher’s cover. See Closing the switcher on page B-4.
If you choose to check the switcher for proper operation before putting the
cover back on, ensure that tools and hands are outside the switcher, and
then connect the power cord to the unit and to an AC source. The
switcher should power up normally. Unplug the AC power cord, and
reinstall the switcher.
6. Attach the power cord to the switcher and to the AC power source. Make
sure the switcher is working properly.
7. If the switcher was removed from a rack, remove its power cord, reattach the
switcher to the rack, and reconnect the power cord.
8. Reconnect the input and output cables.
Button Labels
Figure B-5 provides blanks of a 16-button strip of button labels. Feel free to
photocopy them or cut them out of the manual, write button information in each
button area as desired, and put them in the switcher’s label window. For 8-button
strips and 12-button strips, use scissors to trim the blank to the appropriate length.