HCD-E1 Installation & Operation Manual Chapter 2 - Installation and Setup
11/12/00 10:36 Installation and Setup 2-7
Warning
Setting the FGND/GND jumper to OFF may make the equipment unsafe
for direct connection to unprotected telecommunication networks at
locations where constant excessive voltages may be present on the
lines.
Removing the E1 Sublink Interface Board
The E1 sublink interface board is located over the main board, and is
installed with the component side facing the main board. It is electrically
connected to the main board by means of a flat cable via the J10 connector
on the main board (see Figure 2-1).
The E1 sublink interface board is attached to the main board by means of
two metal spacers. The two spacers near the rear panel are also used to
provide a low-resistance path to ground.
The board is connected by wires to the E1 sublink BNC connectors, which
are fastened to the rear panel. These wires do not have to be disconnected
when the sublink interface board is removed.
Figure 2-3 explains how to remove the sublink interface board. Use the
following procedure:
1. Identify the two nuts that fasten the sublink interface board to the
spacers.
2. Remove the nuts and their washers.
3. Disconnect the flat cable from the connector J10 on the main board
(see Figure 2-1).
4. Hold the sublink interface board from its sides, and carefully pull it
straight up. Once the board is free, turn the board over the rear panel,
and let it rest on the work table. Do not strain the wires connecting the
board to the BNC connectors.
CABLE
CONNECTORS
Sublink
Interface
Board
Remove Nuts
and Washers
(2 Places)
Turn Board
Over
Figure 2-3 Removal of Sublink Interface Board
