Chapter 4: C4 CMTS General Installation Requirements
STANDARD Revision 1.0
C4® CMTS Release 8.3 User Guide
© 2016 ARRIS Enterprises LLC. All Rights Reserved.
116
4.
On the front power status panel, turn the PCM (to be replaced) off for the appropriate power branch by pushing and
holding its power button down. There is an approximate 2-second delay on the power down to avoid accidental
shutdowns.
5.
At the rear of the chassis, power off the BUS A or B FEED (the feed of the PCM to be replaced) on the PCM by turning
the MAIN breaker to the OFF position.
6.
Remove the power cable.
7.
Unscrew the three captive fasteners on the rear of the PCM.
8.
Remove the PCM and insert the replacement PCM.
9.
Tighten the captive fasteners by hand. If the captive fasteners are tightened using a tool, care should be exercised not
to over-tighten. The recommended torque for these fasteners is 5.0 ±0.5 inch-pounds.
10.
Insert the power cable.
11.
Power the MAIN breaker switch back ON.
12.
Confirm the PCM and power feeds are functioning properly by verifying all four of the replaced BUS (A or B) branch
LEDs are green.
Front Panel Access
Protective panels mounted on the front of the chassis flip open, as illustrated in the figure below.
The top single panel flips up to reveal the power panel and power LEDs.
The mid and lower matching panels flip open to allow access to the ejector clips for the front modules.