ENGLISH
ENGLISH
4
NAMES OF CONTROLS AND INDICATORS
(Page 10)
A
ATT switch
The gain of the amp increases during
BTL
operation in com-
parison with normal stereo operation.
The
ATT
switch is an attenuator switch that reduces the amp
gain by 6dB so that the gain is same with the gain that is out-
put during normal stereo operation.
B
INPUT jack
The L(BTL)/R input jacks are the left/right signal input jacks.
When using the amp as a BTL amp (monaural), input the sig-
nal to the L(BTL) input jack.
During BTL operation, this jack also functions as the BTL line
amp signal input jack.
C
BTL switch
When this switch is in the
NORMAL
position, the unit functions
as a stereo power amp.
When this switch is in the
BTL
position, the unit functions as a
monaural power amp.
Caution:
The BTL circuit (Balanced Transformerless circuit) can amplify
the output power by having two amps connected to each other
through a bridge connection; this amp will then function as a
monaural amp. In addition, when this switch is in the BTL posi-
tion, the signal from each amp is output to their corresponding
BTL output jack (BTL OUT).
D
BTL OUTPUT jack
These are the
BTL
line amp output jacks. The signal is output
on these jacks if
C
BTL
switch is set to the
BTL
position.
A signal with the same phase as the signal that was input to
the L(BTL)/R input jacks is output on the L+/R+ output jacks,
and a signal with the inverted phase as the signal that was
input to the L(BTL)/R input jacks is output on the L-/R- output
jacks.
If another stereo power amp is connected, it can be used as a
BTL power amp (monaural).
(Do not connect any power amp for which the BTL connection
is not guaranteed.)
E
SPERKER OUTPUT treminal
These output terminals are for connecting the speaker sys-
tems.
Refer to page 2 for details on how to connect the speaker sys-
tem when using the SM-17 as a stereo power amp.
When using the SM-17 as a BTL amp (monaural), connect the
speaker system to the L
terminal and the R
terminal.
In this case, connect the positive line from the speaker system
to the BTL
(L
) terminal, and the negative line from the
speaker system to the BTL
(R
) terminal.
F
AC IN jack
Connect to AC power outlet.
This unit can be powered by 120 V AC only.
G
AC OUTLETS
[SWITCHED]
The switched outlet is turned on and off by the main power
switch. The maximum power capacity of this outlet is 120W.
[UNSWITCHED]
Use this outlet as the power supply for a component that does
not need to be turned on and off by the main power switch.
The maximum power capacity of this outlet is 120W.
Do not plug a device that consumes a great deal of power into
this outlet.
For the best audio quality, we recommend that you plug your
CD player, MD player, or other digital audio component into a
power outlet that is independent of the power supply for the
amp.
q
POWER switch
Press to turn power ON and press again to turn it OFF.
Meter
w
lights up when the
POWER
is turned
ON
.
w
Warm-up meter
With any audio unit, the real sound quality cannot be obtained
immediately after the power is turned on, and warming up is
required to make the unit exhibit its full performance. As time
passes after the power has been turned ON, the temperatures
of different parts of the unit become constant and the electro-
lytic capacitors become active.
This meter allows to check the warm-up condition of the unit.
The meter needle starts to swing gradually in a little while after
the power is turned ON and reaches about 2/3 of the meter’s
full scale in about 30 minutes. Now the unit has almost been
warmed up and can reproduce music with its original perfor-
mance.
The meter positions immediately after turning power on and at
the end of warming up and the time taken for warming up are
variable depending on the temperature, ventilation and other
conditions of the listening room where the unit is located.
TROUBLESHOOTING
In case of trouble with the unit, first check the following before
calling for service. What seems to be a serious malfunction is
often due to a simple operation mistake.
If the trouble still persists after checking, please consult your
dealer or nearest MARANTZ service agent.
The amplifier does not work and the warm-up meter lamp
does not light.
1.
Check if the power cord is plugged properly into an AC
power outlet.
Sound is produced only from one of the speaker systems.
1.
Check the connection of the RCA pin cords and speaker
cords.
2.
Turn power of the set off and change the connections of the
left and right speaker systems, If sound is still not output
from the same speaker system, check its connection cord
or the speaker system itself.
Sound is not produced at all.
1.
Check the connection of the speaker cords.
2.
Check the connection of the RCA pin cords.
The sound from both speakers is monaural.
1.
Make sure that the
NORMAL/BTL
switch is not set to the
BTL position.
Caution concerning Bi-amp Connection
Some speaker systems that permit bi-wiring do not permit bi-
amp connection as described in the example on the preced-
ing page. For example, if the
or
speaker terminals used
for bi-wiring are shared, bi-amp connection is not possible with
that speaker system.
(The system will not operate correctly because the amp’s pro-
tective circuits will be worked, etc.)
For details, refer to the user guide provided with the speaker
system, or contact the manufacturer of the speaker system.
