Marantz MM8003 - Manual (Page 17)

BASIC
CONNECTIONS
OPERA
TION
ADV
ANCED
CONNECTIONS
TROUBLESHOOTING
OTHERS
NAMES AND
FUNCTION
TROUBLESHOOTING
ENGLISH
13
TROUBLESHOOTING
If you believe something is wrong with your amplifi er, check the following points. Unintentional errors in
operation or mistakes made in the connections are sometimes misinterpreted as failure.
If the failure persists even after checking the below points, contact your dealer, your nearest Marantz Consumer
Marketing offi ce or customer center, or a Marantz service center.
Symptom Cause Remedy
Related
page
The amplifier's power fails to
come on. The power plug is not connected. Insert the power plug into the wall
outlet.
7
No sound can be heard from the
speakers. The connecting cables (input) or speaker
cables have been incorrectly connected. Check the cable connections.
5, 6
The setting of one or more of the input
selector switches does not correspond
to the input connector (BALANCED or
UNBALANCED) to which the cable has
been connected. Set the input switch to the position that
corresponds to the input connected to
the amplifi er.
4
The power suddenly goes
off, and the standby indicator
blinks slowly (about two times
a second). The temperature inside the amplifi er has
risen, tripping the protection circuit. • Turn off the power, and wait until
the amplifier's temperature has
fallen to a low enough level before
turning the power back on.
• Check whether the amplifi er has
been installed in a position that
interferes with the dissipation of its
heat.
2
The protection circuit has been tripped
because two conductors ("+" and "-") of
a speaker cable are touching each other
or because the conductors have made
contact with the rear panel or another
metal part. • Turn the power off, and check the
speaker cable connections.
• Re-process the ends of the
conductors of the speaker cables.
6
Sound is being played at a volume higher
than the performance of the amplifi er can
deliver. Turn the power off, turn down the
volume control on the control amplifi er
connected to this amplifi er, then turn
the power back on.
–
Speakers with an impedance below the
specifi ed rating (6 Ω) are being used. Use speakers with the specified
impedance. 6
The power suddenly goes off,
and the standby indicator blinks
rapidly (about eight times a
second). The amplifier's protection circuit has
been tripped. Disconnect the power plug from the
power outlet, and ask your nearest
service center to repair the amplifi er.
14
RESETTING THE AMPLIFIER
This amplifi er features a microcontroller.
The microcontroller can be reset by following the steps below.
ONTROL DC CONTROL REMOTE CONTROL REMOTE CONTROL
OUT OUT OUT IN IN IN IN
1. Set the amplifi er to standby or turn its power on.
2. Use the tip of a needle or other sharp-pointed object to press the reset switch in the hole indicated by the
arrow for at least 1 second.
3. When the amplifi er power is already on, the amplifi er is fi rst set to standby mode, after which the
microcontroller is initialized, and the power is turned back on.
When the microcontroller is reset with the amplifi er in standby mode, it is initialized, then the power is
turned back on.
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