Troubleshooting - Marantz PM7003 User Manual

trouBleshootiNg

BeFore coNsideriNg it as a Failure
In case of trouble with this component, 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 is not fixed after making the following checks, contact the place of purchase, your nearest
Marantz dealer, our customer service center, or our repair service center.
Phenomenon Causes
The power cable is disconnected.
The unit is in STANDBY mode.
Power is not supplied.
The protection circuit is activated.
Speaker connection is incomplete.
Input cord connection is incomplete.
The INPUT SELECTOR knob is not set
correctly.
The VOLUME knob is set to minimum.
Power is supplied, but no
sound is heard from the • The SPEKAERS knob is set to OFF.
speaker.
• Setting of the SPEAKERS knob is
incorrect.
Setting of the POWER AMP DIRECT
button is incorrect.
The MUTE function is activated.
Speaker connection is incomplete.
Sound is heard from left or
Setting of the BALANCE knob is
right speakers only.
incorrect.
Left and right channels are Connection of left and right speaker
reversed. cords or input cords is reversed.
Grounding connection from the record
player is improper.
Noise occurs during record Connection to the PHONO jacks is
playing. incorrect.
A TV set or the like placed too close to
the record player may affect the sound.
Speakers are placed too close to the
record player.
Howling occurs when sound
volume is increased during
The record player is placed on a rack or
record playing.
floor that is easily vibrated.
aBout the protectiVe circuit
This unit is equipped with a protective circuit to
protect the amplifier circuits and speaker system
against damage.
If the protective circuit is activated, the sound is
instantly muted.
Actions
In this case, either the MUTE indicator flashes, or
the STANDBY indicator above the POWER ON/OFF
Check the power cable connections.
button flashes.
Turn the INPUT SELECTOR knob or
press the POWER ON button on the
remote controller.
at poWer oN
If the STANDBY indicator is flashing,
turn the power OFF, then ON again For about 8 seconds after the power is turned on,
after 1 minute or more.
the protective circuit is activated muting the sound
to give the amplifier circuits time to stabilize. Once
Check the speaker cable connection.
the amplifier circuits stabilize, the protective circuit
Check the input cable connection.
releases and audio is enabled.
Set the INPUT SELECTOR knob
properly.
iN the eVeNt oF oVercurreNt
Turn the VOLUME knob to the proper
level.
The protective circuit is activated if current exceeding
Set the SPEAKERS knob properly
a certain level is detected, which can happen if
according to the SPEAKER terminals
excessive signal flow is input to the amplifier or if
to which the speakers are connected.
the unit is connected to a speaker system of less
Set the POWER AMP DIRECT button
than 4
properly.
activated if a speaker cable shorts.
If the MUTE indicator is lit, press the
In these cases, the MUTE indicator flashes, and
MUTE button on the remote controller
the volume is automatically reduced. Approximately
to release the MUTE function.
15 seconds later the protective circuit is released,
Check the speaker connections.
therefore the volume needs readjusting to continue
normal use.
Set the BALANCE knob properly.
Moreover, if the overcurrent continues, the amplifier's
power shuts OFF and the STANDBY indicator above
Make connections properly.
the POWER ON/OFF button flashes.
Check the connections to the PHONO
GND terminal.
iF eXcessiVe ultra-Bass sigNals are iNput
Check the connection to the PHONO
input jacks.
The protective circuit is also activated if ultra-
Place the TV set or record player in
bass signals that exceed the base signal range
another position.
settings are input. In this case, the MUTE indicator
Place the speakers away from the flashes, and the volume is automatically reduced.
record player as far as possible.
Approximately 15 seconds later, the protective
circuit is released, therefore the volume needs
If an insulating pad is not supplied with
the record player, use an insulating pad
readjusting to continue normal use. If excessive
available in the market.
ultra-bass signal input continues or if DC voltage
is detected due to trouble with the amplifier, the
power shuts OFF and the STANDBY indicator above
the POWER ON/OFF button flashes.
The protective circuit is activated if the temperature
of the main-amplifier section rises above a certain
level, which can happen if the amplifier is continually
used with excessive signal flow being input into
it. The protective circuit is also activated when
the set operating temperature is exceeded, which
can happen if the vents on top of the amplifier are
covered, or if the amplifier is installed on a cramped
audio rack. In these cases, the MUTE indicator
flashes, and the volume is automatically reduced.
Approximately 15 seconds later, the protective
circuit is released, therefore the volume needs
readjusting to continue normal use.
If the temperature does not sufficiently lower
within a certain amount of time after the protective
circuit activation, the power shuts OFF and the
STANDBY indicator above the POWER ON/OFF
button flashes.
The protective circuit is activated and the power is
automatically shut OFF if an abnormality is detected
in the power circuit. The same happens if the main
impedance. The protective circuit is also
fuse inside the amplifier blows. In these cases, the
STANDBY indicator above the POWER ON/OFF
button flashes.
In cases as mentioned above, immediately
disconnect the power cord, and contact the place of
purchase, your nearest Marantz dealer, our customer
service center, or our repair service center.
ENGLISH
iF the maiN-ampliFier oVerheats
iN the eVeNt oF ampliFier trouBle
13