User Guide

Crestron CNAMPX-12/16X60 Professional Audio Amplifiers
Internal Replacement Procedures
Internal replacement procedures consist of Amplifier Module, Audio Output Relay
Board Replacement (not contained in CNAMPX-12X60), Cresnet System Interface
Card procedures, and In-Rush Surge Suppressor. Prior to performing any of these
procedures, the Disconnect Unit and Cover Removal procedure must be performed.
After the internal procedure(s) has been performed, the Cover Installation and
Reconnect Unit procedure is performed.
Disconnect Unit and Cover Removal
To replace the internal components of the CNAMPX-12/16X60, the unit must first
be disconnected and the cover removed. To disconnect the unit, the only tool
required is a #2 Phillips screwdriver and the only tool required to remove the cover is
the 1/8-inch hex wrench supplied with the unit. Complete the following procedure in
the order provided.
WARNING: The CNAMPX-12/16X60 amplifiers are heavy units. The CNAMPX-
12X60 weighs approximately 81.40 lbs (37.00 kg) and the CNAMPX-16X60 weighs
approximately 90.20 lbs (41.00 kg). Use more than one person to remove unit from
or install unit into rack.
CAUTION: To prevent stripping of screw heads, threads, or mounting holes, do
NOT overtighten screws. Tighten only to the specification listed in the individual
step(s).
NOTE: The unit shown in this procedure is a CNAMPX-16X60. The procedure is
identical for all models and all versions except where noted.
1. At the CNAMPX-12/16X60 front panel, position the POWER switch to
OFF.
2. At the rear panel, disconnect the AC power cord from the power port.
3. Detach the Cresnet system wiring connector from the NET port.
4. Using a #2 Phillips screwdriver, loosen the ground screw, remove the
ground wire, and retighten the screw.
5. Label and detach all audio input and output cables/wires from the
respective connectors.
6. Use at least two people to place the CNAMPX-12/16X60 on a suitable
work surface.
Service Guide - DOC. 5885B Professional Audio Amplifiers: CNAMPX-12/16X60 • 5