Astin Trew AT5000 Руководство по эксплуатации - Страница 7
Просмотреть онлайн или скачать pdf Руководство по эксплуатации для Усилитель Astin Trew AT5000. Astin Trew AT5000 10 страниц. Dual mono power amplifier
Печатать страницу6. Operation
The power amplifier on-off switch is
located on the left side of the front
fascia. The blue LED light above the
switch is illuminated when on. See
illustration, page 4.
We recommend that the amplifier is
turned on half an hour or more before
you wish to use it. This is not essen-
tial but we think our amplifiers sound
better once they have 'warmed up'.
We do not recommend that you leave
it on all the time but it will come to no
harm if you do. From new, you will
find that the amplifier will need up to
100 initial hours use to achieve its
optimum audiophile sound.
The valves fitted have been selected to
offer a high quality performance. If
you wish to experiment with alternative
manufacturers' valves, after the
warantee period, replace with ECC 82
(12AU7) types. Other valve types may
damage the amplifier.
In the unlikely event of the amplifier
failing to work properly when first
switched on please refer to trou-
bleshooting in section 8.
7. Valve and internal fuse
replacement.
6
Replacing or substituting the valves; or
replacing the internal fuses in the
unlikely event of failure, can be carried
out by your dealer or distributor. If
you attempt to replace either compo-
nent, the following instructions must
be adhered to.
Note: Dangerously high voltages
are present inside the unit, when
powered from the mains supply,
that can kill.
NEVER open the amplifier when
attached to the mains supply.
A. Disconnect the amplifier from all
equipment and the mains supply.
Place on a table or work bench with
plenty of space around the amplifier.
Caution: Wait 1 hour before opening
cover to allow the valves to cool and
capacitors to discharge.
B. Undo the 10 x Alan screws in top
plate with key provided, Put the
screws somewhere safe.
C. Remove the top plate, place on a
non-scratch surface to prevent
marking.
You are now ready to replace the
valves or the fuses.
Valve replacement. We recommend