044-05xxx Rev A
2-3
2-5 Installation
Instructions
Install the G3L-929-135 amplifier as follows:
WARNING
Turn off external primary DC power before connecting DC power
cables.
2-5.1 Installing the Amplifier into a Sub-rack
1. Inspect the 21WA4 male combo connector (Figure 2-2) on the rear of each amplifier. Verify that all
pins are straight, no pins are recessed, packing material is removed, and that the alignment shield is
not bent.
2. Set the power Reset/On/Off switch on each amplifier to “Off” (down position) as shown in Figure 2-1.
CAUTION
Do not slam or force the amplifier into the sub-rack. This may cause the pins
on the combo connector of the amplifier to become recessed or broken.
3. With the thumbscrews in the unlock position, install the amplifier(s) into the sub-rack, positioning
each in accordance with the information in the system manual. Turn the top and bottom thumbscrews
to the lock position as shown in Figure 2-1 to secure the amplifier(s) in the sub-rack.
WARNING
Check your work before applying DC voltage to the amplifier. Make
certain all connections are tight and correct.
4. Measure primary DC input voltage. DC input voltage should be +27 Vdc ±1.0 Vdc. If the DC input
voltage is above or below the limits, call and consult an electrician before you turn on your amplifier
system.
5. Refer to Chapter 3 for initial turn-on and checkout procedures.
Figure 2-1. Power Switch Functions and Unlocking/Locking Thumbscrews
3-Position Switch:
Reset
(Up)
On
(Middle)
Off
(Down)
Unlocked
Position
Locked
Position
