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ENGLISH
ENGLISH
If you experience trouble with the PM-11S1, make the below
checks before thinking the worst. Improper operation can cause
the PM-11S1 to behave in a way that makes you think
something is wrong with the equipment when actually not. If
the trouble cannot be fixed after making the below checks,
contact the place of purchase, your nearest Marantz dealer,
our customer service center or our repair service center.
* Power does not turn ON.
1. Is the power cable securely plugged into a power outlet?
2. If the OPERATE indicator on the display is flashing a red
color, a protective circuit has tripped. Shut power OFF, wait
a few minutes and then reactivate the power.
* Nothing is heard from the speakers.
1. Aren’t the SPEAKER A and B buttons on the front panel in
the OFF position?
2. Isn’t the attenuation feature (ATT) active?
3. Isn’t there trouble in the input source selected from the
INPUT SELECTOR knob on the front panel?
4. Are you using the player (replaying device) correctly?
5. Are connection cables and speaker cables securely
connected?
6. Volume may have been muted by a protective circuit that
tripped. Try adjusting the volume level again.
7. If an error message is displayed, correctly set the ID number
as indicated in the table under “Error Messages”.
* Volume level differs between left and right
channels.
Volume, bass and treble level may be trimmed differently for
the left and right channels. Try trimming again.
* Stereo sound is not heard from the speakers.
The operating mode switch on the rear panel may be set to
“BI-AMP”. Shut power OFF, set the switch to “STEREO” and
then reactive the power. Power must be activated after the
operating mode switch is set for the setting to be active.
* Record player audio is not heard or contains
a lot of noise.
1. Is the PHONO MC button on the front panel set to the type
of cartridge you are using?
2. Are connection cables securely connected?
3. Is the grounding wire from the record player connected to
the PHONO GND terminal?
4. Is the cartridge properly connected to the tone arm?
TROUBLESHOOTING
77
77
7 About Protective Circuits
The PM-11S1 is equipped with protective circuits to protect
the amplifier circuits and speaker system against damage. If a
protective circuit trips, the sound is instantly muted. In this case,
either “PROTECT” flashes on the display or the display panel
goes out and the OPERATE indicator on the display flashes a
red color.
• At Power ON
For about 8 seconds after power is activated, a protective circuit
trips and mutes the sound to give amplifier circuits time to
stabilize. Once the amplifier circuits stabilize, the protective
circuit releases and audio is enabled.
• In the Event of Overcurrent
A protective circuit trips if current of a certain level is detected,
which can happen if excessive signal flow is input to the
amplifier or if the PM-11S1 is connected to a speaker system
of less than 4 Ω impedance. A protective circuit can also trip if
a speaker cable accidentally shorts. In these cases,
“PROTECT” flashes on the display and, approximately 8
seconds later, the sound is automatically muted and the
protective circuit is released. Therefore, readjust the volume
level to resume normal use.
If overcurrent is detected because of trouble with the amplifier,
the OPERATE indicator on the display flashes a red color and
power shuts OFF.
• If Strong Bass Signals Are Input
A protective circuit trips if bass signals of an excessive level
are detected. In this case, “PROTECT” flashes on the display
and, approximately 8 seconds later, the sound is automatically
muted and the protective circuit is released. Readjust the
volume level to resume normal use. If these strong bass signals
continue or if excessive DC voltage is detected because of
trouble with the amplifier, the OPERATE indicator on the display
flashes a red color and power shuts OFF.
• If the Power Amplifier Overheats
A protective circuit trips if the temperature of the main amplifier
rises above a certain level, which can happen if excessive
signal flow is continually input into the amplifier. Temperature
can also exceed the trip level of the protective circuits if the
vents on the top of the PM-11S1 are covered or if the PM-
11S1 is installed on a cramped audio rack. In these cases,
“PROTECT” flashes on the display and, when the temperature
inside the unit lowers, the sound is automatically muted and
the protective circuit is released. Readjust the volume level to
resume normal use. If the temperature does not sufficiently
lower within a certain amount of time after the protective circuit
trips, the OPERATE indicator on the display flashes a red color
and power shuts OFF.
• In the Event of Amplifier Trouble
A protective circuit trips and automatically shuts OFF the power
if abnormal voltage is detected in the power circuit for whatever
reason. The same happens if the main fuse inside the amplifier
blows. In these cases, the OPERATE indicator on the display
flashes a red color.
04.10.15, 4:06 AMPage 20