Advent Communications
6.
MAINTENANCE & FAULT FINDING
6.1. PERIODIC
MAINTENANCE
Check the rear and side ventilation grills are clear of obstructions to ensure an adequate
airflow.
6.2.
ELECTROSTATIC SENSITIVE DEVICES (ESD!)
Before removing a Module or Printed Circuit Board containing static sensitive devices,
a wrist strap and earth cord must be used to discharge static.
Place the board in a conductive plastic bag before transporting.
When removing a CMOS static sensitive component from a PCB, the following
equipment should be used:
OBSERVE
PRECAUTIONS
FOR HANDLING
ELECTROSTATIC
SENSITIVE
DEVICES
Some components are static sensitive and
certain handling precautions must be taken to
prevent these being permanently damaged
by static charges or fast surges.
a. A workbench with an earthed conductive surface
b. Metallic tools earthed permanently or by repeated discharges.
c. Low-voltage earthed soldering iron.
d. An earthed wrist strap and a conductive earthed seat cover for the operator, whose
outer clothing must not be of man-made fibre.
6.3.
TEST/ALIGNMENT OF UNITS FITTED WITH AC/DC POWER SUPPLY
WARNING
Hazardous voltages are present with lid removed
Diagnostic work on AC powered units or PCBs must be carried out in a test area
designated and equipped for live testing. If units have recently been in operation, time
must be allowed for the discharge of capacitors before handling the unit.
6.4.
SATELLITE TRANSMISSION EQUIPMENT
Radiation Hazard warnings should be prominently displayed and a safe area around
any live transmissions should be coned off. Normal electrical good practice is to be
observed at all times and all cables, connectors and waveguide couplings should be
inspected for integrity.
The following recommended good practise should be complied with whenever
applicable:-
Before beginning a start-up procedure of a High Power Travelling Wave Tube Amplifier
(HPTWTA), or SSPA.
Proper integrity/serviceability of the output waveguide system, correct fitment of the
waveguide terminating loads.
Correct operation of waveguide switches and phase combining units.
When transmission with an antenna system is to be carried out, the area in front of the
antenna must be coned off.
Immediately after the powering up of a high power amplifier or SSPA, carry out the
following checks:
209297 – DCU5000 Drive Control Unit
Page 37 of 42
Summary of Contents for ADVENT DCU5000
Page 3: ...Advent Communications EMC DECLARATION 209297 DCU5000 Drive Control Unit Page 3 of 42 ...
Page 41: ...Advent Communications 209297 DCU5000 Drive Control Unit Page 41 of 42 8 FIGURES ...
Page 42: ...Advent Communications FIGURE 1 DCU5000 LAYOUT 209297 DCU5000 Drive Control Unit Page 42 of 42 ...
