Accuphase C-280 - Page 10

PRECAUTIONS
" Precautions concerning heat build-up
Because each amplifier unit uses power
transistors in a pure class A con-
figuration, a considerable amount of
heat is generated. The top panel may
become hot after this unit has been
operated for a while, but this has no
adverse effect on performance and is
not a malfunction. The C-280,
including the attractive wooden cabi-
net, is carefully designed to provide
sufficient heat dispersion at all
times. However, to assure adequate
ventilation, do not place this unit in
narrow confines or in such a way that
proper ventilation is impeded. Also,
do not place this unit in a location
exposed to direct sunlight or near a
room heater or other heat source.
m Turn AC power off when connecting or
disconnecting inter-connecting cables
When RCA type pin plugs, the most
widely used connectors for intercon-
necting cables, are used, the (+) and
(-) leads are connected or discon-
nected separately, i.e., one side
before the other. If this is done
without having first turned off the AC
power, a momentary current surge that
results may damage the speaker. Always
remember to turn the AC power off
before trying to connect or disconnect
the cables between associated com-
ponents.
в Using the shorting pin plugs
The DISC 2 jacks are equipped with
shorting pin plugs. When only the DISC
1 jacks are used, the DISC 2 shorting
pin plugs should be left in place. If
they are removed to accommodate a
second turntable, the plugs should be
reinserted in another set of unused
input jacks (TUNER, LINE, TAPE PLAY)
that is not being used. The shorting
plugs should never be inserted in any
of the output jacks as no sound will
be heard.
Cleaning the wooden cabinet
The cabinet of this unit is made of
persimmon wood. Wipe off dirt and
dust from time to time with a damp
cloth that has been well wrung out.
Commercial wood cleaning and polishing
products may permanently mar the
finish of this cabinet. Avoid waxing
since the wood may become too glossy
or the wax may accumulate on the sur-
face of the wood without being
absorbed, leading to an unsightly
coating of dust.
Do not place the C-280 directly on top
of or underneath a power amplifier
This unit contains a high gain pre-amp
with a moving coil cartridge (MC) head
amplifier. If it is placed too close
to a power amplifier or another com-
ponent that generates a strong magne-
tic field, a hum may be produced in
this unit through magnetic induction.
Therefore, leave a gap of at least 10
cm between this unit and other audio
and video components. When placing
components in a rack, be sure to allow
sufficient ventilating space for the
power amp.