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7. MAINTENANCE
W A R N I N G
HIGH VOLTAGE!
The mains line voltage plus a high DC voltage up to 500V inside the
ACOM 600S amplifier are LETHAL! For your safety, pull the amplifier
power plug out of the mains wall outlet and WAIT AT LEAST three
minutes EACH TIME BEFORE servicing the amplifier!
7-1. Periodic maintenance; general checks and cleaning
a) Periodically (but not less than once per year) check the connection reliability, contacts cleanliness and the
tightening of all connectors, in particular the coaxial ones – including their outer conductors.
Check the integrity of the cables, in particular if they are lying on the floor. Check also if the cables are secured
well in the area where they come out of the connector body.
Pay particular attention to the mains plug and the wall outlet for it – if you have any doubts consult with an
electrician.
Periodically check the SWR of the antennas and whether it is changing over time. Problems could occur more
often in poor weather conditions – rain, snow, strong wind etc.
b) Periodically (more often in a dusty environment, but at least once per year) clean the air filter without
opening the amplifier.
W A R N I N G
The air filter may be too dusty - be careful how you clean it so that
you DO NOT INHALE (BREATHE IN) neither spill the dust over! Wrap
it, for instance, in a wet cloth before cleaning!
Use a Philips-1 screwdriver to remove the square filter cover from the rear panel center – see the four screws in
Fig. 2-1. Remove the cover and take out gently the foam-like plastic filter. Clean up the filter and the cover
carefully from dust, wash them with tap water and leave them to dry up before you mount them back.
While the air filter is drying, clean the fan propeller and its body with a vacuum cleaner and a soft brush. Clean
also (as far as possible from outside without opening the amplifier) all ventilation apertures on the cover and the
chassis, including at the bottom. Finally, mount the air filter in reverse order and screw in its four screws tightly.
C A U T I O N
Do not use solvents for cleaning – they can be dangerous to you, as well
as to the coating or the amplifier plastic parts.
In case of need
,
clean the outside amplifier surfaces also without opening it. Use a soft piece of cotton cloth,
slightly moistened with clean water.
7-2.
Replacement of fuses
W A R N I N G
HIGH VOLTAGE!
If replacement of fuses is necessary, first pull out the amplifier mains
plug from the mains outlet and wait for at least 3 minutes!
The main mains fuses of the amplifier are located on the rear panel – Fig. 2-1. Your amplifier may be fitted with
one or two main fuses – see S. 2-3(g).
The fuses must be of the fast type, European size 5x20mm, rated for 250VAC and a current as follows:
C A U T I O N
The fuses must be rated for a current corresponding to your mains nominal
voltage: 10
А
for operation from 100-120VAC mains voltage or 6.3
А
for
operation from 200-240VAC. Use only standard fuses!