User manual

Maintenance
Replacing Low-Speed Cards
10-8 July 2004 Wide Bank 28 DS3 - Release 2.4
CAUTION! WHEN HOT-SWAPPING AN MSO CARD, ALWAYS PULL THE WHITE
EJECTOR LATCH LEVER TO EJECT THE MSO ELECTRONICS SECTION.
DO NOT PULL THE RED EJECTOR LATCH LEVER BECAUSE IT WILL EJECT THE MSO
RELAY SECTION AND INTERRUPT SERVICE ON ALL CIRCUITS OF THE CARD.
WARNING! NEVER INSERT THE RELAY SECTION OF AN MSO CARD INTO A WIDE
BANK UNLESS THE ELECTRONICS SECTION OF THE CARD IS CORRECTLY LATCHED TO IT.
FAILURE TO DO SO MAY DAMAGE THE RELAY SECTION.
Figure 10-5 Removing an MSO Electronics Section
Removing the Electronics Section of an MSO Card
1. Use a Phillips head screwdriver to loosen the two fastening screws on the faceplate of the Wide
Bank and remove the plate. See Figure 10-5.
2. Locate the low-speed card you want to remove. See Figure 10-1 for low-speed card and circuit
locations.
3. Pull out the white card ejector latch to release the electronics section of the MSO card from the
relay section. Do not disturb the red ejector latch. See Figure 10-6 and Figure 10-5 for the
location of the white latch (upper latch) of each MSO Quad card.
4. Slide the electronics section of the card out of the Wide Bank.
MSO
Relay Section
White
Latch
Red
Latch
MSO
Electronics Section
Captive Screws