Marantz MM8003 MM8003 User Manual - English - Page 15

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