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870A Reference Dual-Mono Power Amplifier
Operating the 870A
We recommend leaving your 870A powered up at
all times to maintain optimal performance. When
you plan on being away for a few days, it may not
be a bad idea to power off your amplifier. Please
Turning on your MOON 870A for the first time
Prior to turning the amplifier on for the first time,
make sure that every cable is properly connected to
avoid any problems. Then turn on your preamplifier
connected to the 870A.
switch, located on the rear panel, labeled "POWER"
to the '1' (on) position. The blue LED on the front
panel will blink for up to 10 seconds while it
achieves standby mode. When it stops blinking and
On and Off Sequence
To avoid having any annoying noises (ie. "thumps"
and "pops") emanate from your speakers when
powering your 870A on or off, you should always
Troubleshooting
The blue LED located on the front panel also
indicates the operational status of your MOON
870A Dual-Mono power amplifier. When the LED
starts blinking on and off during use, the circuitry is
either over-heating or has detected the presence of
DC in the input signal:
Your MOON 870A is a "smart" power amplifier
equipped with a self-diagnostic system that will
automatically shut itself down when it detects DC
(direct current) from any input. If your 870A power
amplifier turns itself off or will not power up, there
may very well be DC present in one (or more) of the
amplifier's inputs coming from one (or more) of your
preamplifier/processor's
source components. You must determine if there is
any DC present. The best way to accomplish this is
by first powering down the 870A via the main
power rocker switch, then physically removing all
inputs to the 870A leaving only the speakers
connected. Attempt to power up your 870A again:
____________________________________________________________________________________
Flick the main rocker
outputs
or
connected
keep in mind that once fully "broken-in", your 870A
requires several hours of operation before reaching
optimal performance after powering it up again.
is not illuminated, your 870A is in standby mode.
Next,
briefly
press
"Standby" located on the front panel. You will hear a
very faint click sound confirming that everything is in
order. The blue LED on the front panel will
illuminate, indicating that the 870A is now powered
up and ready for use.
power up your preamplifier prior to powering up
your 870A. As well, always power down your 870A
prior to powering down your preamplifier.
Left Channel DC protection ............ LED blinks 2 times
Right Channel DC protection .......... LED blinks 3 times
Left Channel Over-heating .............. LED blinks 4 times
Right Channel Over-heating ........... LED blinks 5 times
Unknown Problem ......................... LED blinks 6 times
A successful power up will indicate the presence of
DC coming from your preamplifier or one of your
signal sources (ie. CD Player).
If your 870A still doesn't power up, turn off the
main power switch and check the AC fuse. If the
fuse appears OK, put it back in its socket and then
try to power up again the usual way. If the fuse is
blown, replace it with a fuse of the same rating, and
repeat the above process. At this point, you should
be able to power up your 870A. If not, immediately
consult your dealer for assistance.
the
push
button
labeled
11
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