Maintenance Guide

Cobham Wireless
idDAS Installation and Maintenance Guide 00109GU Rev. 2.0
Page | 116
APOI Chassis Replacement 6.8.4
This section provides basic information on replacing the APOI chassis.
Note the following:
x An APOI chassis with one power supply can be transparently replaced by APOI chassis with two power
supplies and vice versa.
x Be sure to note the slot numbers in which all the modules are located and reinsert them in the new
chassis in exactly the same order.
To replace an APOI chassis
1. Unpack the replacement APOI enclosure and set it aside on a flat clean surface.
2. If you have not already done so, note the slot numbers corresponding to each module. The modules
must be inserted in exactly the same order in the new chassis.
3. Uninstall the suspect chassis as follows:
x Disconnect power.
x Label and disconnect all the RF connecters.
x Disconnect the Eth jumper between the Control module and the Display and Switch module (it is
not necessary to label the connection).
x Disconnect the GND connector.
x Dismount the suspect APOI chassis along with its brackets and place it on a flat surface.
4. Clean the external surface of the suspect APOI chassis of dust and pack it in the packaging of the new
APOI for transport.
5. Referring to the relevant section in Chapter 4, install the replacement APOI as follows:
x Mount the new APOI chassis in the rack.
x Ground the unit.
6. Referring to Section 6.8.2, reinstall the RF modules
in the same order in which they were installed in the
suspect chassis and reconnect the cables according to the user assigned labels.
7. Install the Control module and the Display and Switch module as follows:
x Insert both modules in the appropriate slots.
x Tighten the x2 captive screws of each module using a torque of 078 Nm.
x Reconnect the Eth jumper between the Control module Eth port and
any one of the four Eth ports
on the Display and Switch card
8. Verify the front panel LEDs are as follows:
x BTSI DL Input and DL Output LEDs = steady green
x Control Module CCD status LED = blinking green