Nortel Meridian SL-1 Supplementary Manual page 40

2- 32 Upgrading LE, A, M, MS to Option 21
Shelf upgrades to Meridian 1 553-3001-253
• Disconnect and remove the cable from the QPC33 Tape Interface
(or QPC584 MSI, if equipped) circuit pack located on the CE
shelf to the tape unit or QMM38 Mass Storage Unit (if equipped).
• Remove the tape from the tape unit or disks from the QMM38
Mass Storage Unit (if equipped).
2 Disconnect the cables from the connectors on the faceplate of the
following circuit packs located on the CE shelf:
• QPC425 CPU/SDI circuit pack.
• QPC376 network circuit packs.
• QPC139 SDI2 circuit packs (if equipped).
3 Remove the blank faceplate (if equipped) and the circuit pack in the
last slot on the right end of the QSP39 CE shelf.
• Disconnect the power connections and power monitor connector
C12 from the cabinet power distribution harness to the right end
of the backplane on the QSP39 shelf.
• Disconnect the power connector from the cabinet power wiring
harness to the shelf housing the tape unit (or QMM38 Mass
Storage Unit if equipped).
• Remove the remaining circuit packs from the CE shelf.
• Place a sheet of paper or cardboard in the bottom of the shelf to
ensure that screws are not dropped in equipment below the shelf.
• Remove and temporarily store the four mounting screws securing
the QSP39 CE shelf to the cabinet frame. Remove the QSP39 CE
shelf from the cabinet.
4 Install one P0697421 mounting bracket from the QKM300 kit on each
side of the QSD81 CE shelf. Secure the brackets to the shelf with the
four screws supplied with the QKM300 kit. The brackets are mounted
against the shelf with the mounting edges pointing outward. Ensure
that all the connectors and openings on the side of the shelf are
exposed (Figure 2-12).
• Install the two grommets supplied with the QKM300 kit in the
two holes in the P0697421 mounting bracket on the right end of
the shelf (Figure 2-12).