Marantz MM9340, Руководство по эксплуатации

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9. INPUT XLR and ¼" PHONE jacks
The amplifier uses 1/4" phone jacks and female XLR jacks
for balanced input signals, recommended for longer input
cables and to minimize hum and noise.
Balanced Inputs
It is recommended that balanced input connections be used
whenever possible to take full advantage of the amplifier's
common mode rejection properties, and to reduce ground-
loop problems. The (+) signal is on pin 2 of the XLR, and
the tip of the phone jack. The (-) signal is on pin 3 of the
XLR, and the ring of the phone jack.
Unbalanced Inputs
If an unbalanced XLR input connection is used, pin 3 should
be connected to input ground (pin 1). If the ¼" input jack
is used unbalanced, the use of a mono (tip-sleeve) plug
will automatically tie the (-) connection to input ground.
Note: Never float the (+) or (-) input connection when us-
ing an unbalanced source.
10. RC-5 IN/OUT jack
If your system uses a Marantz remote control com-
patible component with preamplifier outputs, such as an
A/V preamplifier or surround receiver, these jacks allow
you to turn the power of the amplifier to ON or OFF/Standby
through remote control from the preamplifier or receiver.
Before using these jacks, check the owner's manual of the
Marantz component to see if it is remote control compat-
ible.
11. AC INLET
Connect AC cord (Supplied) and plug into a grounded AC
power outlet.
12. DC TRIGGER jacks
Two 3.5mm jacks are used for remote switching between
ON status and OFF/Standby status. An external 12 volt
DC power supply wired in series with a switch is required
for the DC trigger input. Wire the switched DC to the tip of
a 3.5mm miniature phone plug for the DC trigger input,
and wire the power supply ground to the sleeve. Be sure
to use a latching (push-push) type switch rather than a mo-
mentary switch. Assuming the amplifier's main AC power
switch is on, an input voltage transition from 0 to 12 volts
turns on the amplifier (if already in OFF/Standby mode),
and after a one second delay provides 12 volts to the DC
Trigger Out jack for remote control of other amplifiers. A
DC trigger input voltage transition from 12 volts to 0 volts
returns the amplifier into Off/Standby mode.
13. AC FUSE drawer
This is where the AC line fuse is located. In the event of
fuse failure, replace only with MDA 12 250V.
14. INPUT RCA jacks
Connect the preamplifier output to this jack. Since these
connections use unbalanced signals, they are more
succeptable to picking up radiated noise such as magnetic
field from a large power transformer, electric motors,
flourescent lights, computer and video cables, etc. For
best noise performance, keep these cables short and avoid
passing them near any potential noise source.
15. SPEAKER SYSTEM terminals
Dual binding posts provide connections for the speaker out-
puts. In addition to using the banana-type plug, the bind-
ing posts have a slotted entry-way for wire-crimped spade
terminals. In BRIDGE MONO mode, the channel 1, 3, or 5
red binding post is the (+) in-phase speaker output termi-
nal and the channel 2, 4, or 6 red binding post becomes
the (-) out-of-phase speaker terminal.
CAUTION! NEVER CONNECT THE TWO RED BINDING
POSTS TOGETHER OR CONNECT EITHER RED BIND-
ING POST TO A BLACK BINDING POST!
Tip (+)
Ring (-)
Sleeve (Gnd)
Stereo Phone Plug
used for balanced
2 = (+)
3 = (-)
1 = (gnd)
XLR pins are
numbered
on the
connector
insert.
XLR M ale
Tip (+)
Sleeve (Gnd)
M ono Phone Plug
used for unbalanced
RCA Plug
(+)
(Gnd)