Maintenance Guide Part 1

NeTIS MAINTENANCE GUIDE – Version 1.1 32/139
3.4 Removing subsets
3.4.1 P LUG - IN MODULES
The different modules must be plugged in or removed when power is off.
Before removing a module, disconnect the eventual coaxial connections from its front face.
To remove a module, first remove the screws from the four corners of the front face of the
module before gently extracting it by pulling it forward using the extraction handles.
Before any interventions inside the chassis, the mains or 48V input at the rear of the chassis
must be disconnected.
The power supply module has an auxiliary connector (mains input) which must be
disconnected before completely extracting the block.
Plugging a block back in must be done gently but firmly; once the block is correctly engaged
on its connector, push hard on the set to place it correctly.
3.4.2 R EAR FACE
The rear face is removed by unscrewing the 4 screws at each corner of the rear face; the
connection cables are long enough to be able to lay the face on a flat, cleared surface.
3.4.3 V ENTILATORS
Access to the ventilators differs depending on the rack or box versions: for the rack version,
the mains power input located to the rear must be disconnected and then the rack mounting
screws must be removed in order to extract the entire block from the front.
In the box version, access to the ventilators is from the bottom: remove the screws on the
sides and then lift the entire appliance; the lower part comes away.
3.5 Diagnosis and maintenance
WARNING: putting a switch in test mode can cause major radio disturbances both on the
network on which the station is working and on other networks in the region (frequency
changes) - it is therefore strongly recommended to disconnect the base stations before any
tests