A&R Power Amplifier SA150 Panduan Buku Pegangan Pemilik - Halaman 10

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Halaman Cetak
Mains Fuses
All models are fitted with an anti surge (slow blow} 20mm x 5mm diameter fuse, designed to
protect against faults in the amplifier, transformer and mains switch. The values are shown below:
SA200 (all voltages)
5A
SA150 (220/240V)
1.6A
SA150 (120V)
3.15A
THESE FUSES ARE NOT USER REPLACEABLE
Should the SA150 or SA200 fail to function at switch-on the fault is probably external to the
amplifier. In particular, check the fuse in the mains plug (and distribution board, if used) before
suspecting the power amplifier. The switch-on surge currents of the SA150 and SA200 are very
great which is why a 10 or 13 Amp fuse is recommended for the mains plug. You should also
ensure that the IEC mains socket is pushed seucrely home into the IEC plug on the back panel of
the amplifier.
Inspecting and Changing Fuses
In order to inspect or change the fuses you will need to remove the top cover (see Figures 6
and 7).
BEFORE REMOVING THE COVER ALWAYS SWITCH OFF THE AMPLIFIER AND
DISCONNECT THE MAINS SUPPLY. NOTE THAT THE MAINS FUSE REMAINS LIVE
WHENEVER THE AMPLIFIER IS PLUGGED INTO THE MAINS, EVEN WHEN THE
AMPLIFIER SWITCH IS IN THE OFF POSITION.
To remove the top cover use a No 1 'Posidriv' screwdriver to take out the three black screws
located along the top rear edge of the amplifier, above the heat-sinks. The cover may then be
lifted gently upwards and backwards in order to free it from its locating slot in the front panel. The
positions of the fuses are shown in Figure 4. Replacement of the cover is a straight reversal of the
above procedure.
left hand
_
output fuse
max 2.5 Amp
quick blow
(SA150)
max. 3.15 Amp
quick blow
(SA200)
DO,
1CXV
)( )
ioOO
•
right hand
output fuse
max. 2.5 Amp
quick blow
[SA150)
rnax. 3.15 Amp
quick blow
(SA200)
mains fuse
NOT USER
REPLACEABLE
power supply fuses
-RFPLA(
*
Figure 6. Location of Fuses