Nortel Meridian SL-1 Supplementary Manual page 12

2- 4 Upgrading LE, A, M, MS to Option 21
Shelf upgrades to Meridian 1 553-3001-253
• Remove and temporarily store all circuit packs from the QSD12
CPU/Memory shelf 0.
• Place a sheet of paper or cardboard in the bottom of the shelf to
ensure that the screws are not dropped in equipment below the
shelf.
• Remove the four mounting screws securing the QSD12 shelf 0 to
the cabinet frame and remove the shelf from the cabinet.
4 With the four mounting screws install the QSD81 CE shelf in the
space vacated by the QSD12 CPU/Memory shelf 0 (shelf position 5
Figure 2-1).
5 Connect a QCAD109 power adapter cable from connector P5 of the
cabinet power distribution harness to connector G on the QSD81 shelf
(Figure 2-2).
6 Ensure that the option switches and plugs on the circuit packs are
properly set. Refer to 553-3001-211.
7 Install the QPC940 ROM daughter board on the component side of the
QPC687 circuit pack.
• Ensure that the correct QMM42 Data Cartridge is installed on the
connector located on the component side of the QPC742 Floppy
Disk Interface (FDI) circuit pack and that switches 1 and 5 are set
to on.
Note: The software version and ID number indicated on the data
cartridge must match the software version and ID number indicated on
the floppy disks.
8 Install the NT8D68AA Floppy Disk Unit in its assigned position in the
CE shelf (Figure 2-3). The NT8D68AA FDU may be installed in an
alternate location such as the old network shelf in position 6 or any
available PE slots, provided the NT8D77AC floppy disk interface
cable will reach from the front of the NT8D68AA FDU to the front of
the QPC742 circuit card.
Note: If the Floppy Drive is to be located within two slot spaces of
the QPC355 Converter the shield (PO677761) must be installed
between them (Figure 2-3).