Facilities - Crown D-75 Service Manual

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crown
D75· •
I
F C DE E D C
B
A
FIG. 2.
J
FRONT FAC/LlTfED (0-75)
2 Facilities
A. Power
The AC power swilth, mounted at the right-hand comer
of the
0 -75 is
a simple 2 position "on/orr' control. If the
AC
power
switch is positioned at "on", the power
irw:licator should
be
on (8).
B. Power Indicator
Amber indicator thai the unit is on.
C. Level
The level of each channel is independently controlled by
these
controls. The control for channel 2 should be turned
down
and not
used when operating in MONO mode.
D. IOC'"
An InputlOutpul Comparator LED is provided for each
channel. Illumination may occur at such Limes as when
there
is too
high an input level, improper load impedance,
output stage clipping or even an amplifier based problem.
2·1 Facilities
E. Signal Presence Indication
A signal presence indication LED is provided for each
channel to indicate when signal is presenl Unlike
the
"onJ
orr' state orlhe IOC indicators the SP) LED's will vary
with signal Jcvcl
F. Output Monitor
A standard 1/4 inch stereo jack is provided on the fron t
panel. It
is in parallel with
the
main outputs (0) and can
be used to dri ve headphones. -
G. Output Binding Posts
Dual binding postconnectors arc provided at lhe output of
each channel . Use dual banana plugs on lhe speaker
cables for connection
to
thcjacks. In bridged· MONO,
only the twO top jacks (red) are used.
H. Dual-Mono
Slide this switch
to
the
left (ch. I) for MONO
mode
and
1 0 lhe right (eh. 2) for Stereo mode operation. In MONO
mode
the
input and level control for cham' I Cl two should
not
be
used and only balanced (ungrounded) loads should
be connected 1 0 the output jacks.