COMSPHERE 3000 Series Carrier

Power Transformer Unit Installation

The carrier derives its low voltage ac power from the power transformer unit mounted at the bottom of the carrier.

Preinstallation Inspection

Check the unit for physical damage. Ensure that the unit has not been damaged, possibly causing a short circuit of internal components. If the power transformer unit shows signs of shipping damage, report this immediately to your shipping representative and also to your AT&T Paradyne representative. Otherwise, tighten any screws that may have worked loose with a screwdriver and proceed with the installation.

If an SDCP is to be installed in the carrier, inspect the SDCP and its cable at this time, as well, and report any damage.

Installation

If installing an SDCP in the carrier, the ribbon cable that provides power to the SDCP must be installed before the power transformer unit is installed.

SDCP Ribbon Cable Installation

To install the SDCP ribbon cable:

.Procedure

1.Decide on the most convenient height for the SDCP. This is usually at eye level (probably the second or third carrier from the top of the cabinet).

2.Remove the cover plate from the selected carrier by unscrewing the four captive screws (Figure 3-1).

3.At the front of the carrier (Figure 3-6), slide the fan module straight out and set it aside.

Figure 3-6. Power Transformer Unit Installation

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December 1994

3000-A2-GA31-80

Page 37
Image 37
Paradyne 3000 manual Power Transformer Unit Installation