Northern Telecom QCA146 Installation And Testing Instructions page 29

3-22 Installation
2-Mb/s Remote Peripheral Equipment
C h a r t 3 - 2
QSD66 or QSD74 expansion in a QCA146 RPE cabinet
Step P r o c e d u r e
1 Remove screws securing front and rear cabinet covers.
2 Set the input breakers on the QUX20 unit (if equipped) for the
new shelf to OFF.
Note: The designations on the breakers located on the
QUX20 unit correspond to connectors PE2 through PE5 on the
QCAD276 and QCAD277 power cables.
3 If not previously installed, install a QUX20 power unit as follows:
• Insert the QUX20 unit in its position in front of cabinet
(Figure 2-5) and secure with two mounting screws.
• From the rear of the cabinet, connect lead equipped with a
spade connector from the QUX20 unit to the terminal at TB3 at
rear of the QUX19 unit.
4 Remove the louvered top assembly from the cabinet by removing
the six screws through the top assembly.
5 Remove the side panels from each end of the existing top shelf of
the cabinet by sliding panels upward (Figure 2-6).
6 Remove the four hex screws at each end of the top shelf
securing the top panel to the cabinet (Figure 2-6).
7 Remove top panel and place towards rear of cabinet. Do not
damage wiring to the thermostat in top panel.
8 With self-tapping screws supplied, secure a joiner plate (two
screws each) to each end of the existing top shelf of the cabinet.
9 Ensure that the spacers installed in the top of each of the two
front corner uprights of the cabinet are in place (Figure 2-6).
Appendix 1 to 553-2741-200