Nortel Networks DCT1900 manual Adding Boards, Modular Cabinet Fuses near power switch

Technical Product Manual - DCT1900

Maintenance, Part Replacement

-Execute Add command for the New Base Stations in the Base Stations window.

zSLU boards:

-Execute Replace command for the CLU. Remove and re-insert into new position.

-Refresh Radio Exchange and Base Station windows.

-Execute Remove command for the old CLU position.

-Execute Add command for the New Base Stations in the Base Stations window.

5.7Adding Boards

New boards placed into the system are automatically detected by the CPU within 1 minute.

5.8Fuses

In a Modular Cabinet system, the following replaceable fuses are found:

Modular Cabinet – Fuses near power switch

Left fuse, in + rail, red wire:

zProtection against overload AC.

zProtection against overload DC supply (non–earthed).

zProtection against reversed DC supply (non–earthed) connection.

zProtection against reversed PBX (–48V) connection.

zProtection against DC supply with grounded – rail.

Right fuse, In – rail, black wire.

zProtection against overload PBX supply with grounded + rail (–48V).

zProtection against overload AC.

zProtection against overload DC supplies (non–earthed).

zProtection against reversed DC supply (non–earthed) connection.

Replacement:

1.Switch off Modular Cabinet.

2.Replace fuse.

3.Switch on Modular Cabinet.

Modular Cabinet – Fuse near power switch to Backplane

zProtects backplane.

Modular Cabinet – Fuses on the MCCB in Modular Cabinet

The fuses on the MCCB are only used for the "external power" connection.

Front fuse:

zProtection against overload in Base Station powering via PW3/4/5/6.

Rear fuse:

zProtection against overload in Base Station powering via PW1/2/7.

Replacement:

1.Remove the power cable connected to PW–EXT.

2.Replace the fuse.

3.Re–connect the power cable.

5-4	Maint-DCT1900/R8/mw
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