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ENGLISH
If you experience trouble with the PM-15S1, make the below
checks before thinking the worst. Improper operation can cause
the PM-15S1 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?
* Nothing is heard from the speakers.
1. Aren’t the SPEAKERS 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.
The volume level setting may differ between the left and right
channels. Try trimming the volume level 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-15S1 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, “PROTECT” flashes on the display panel.
• 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-15S1 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 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 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-15S1 are covered or if the PM-
15S1 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.