Marantz PM8003 PM8003 User Manual - English - Page 16

Names aNd FuNctioNs Basic coNNectioNs Basic operatioN adVaNced coNNectioNs ENGLISH 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. Power is not supplied. The unit is in STANDBY mode. The protection circuit is activated. Power is supplied, but no sound is heard from the speaker. Speaker connection is incomplete. Input cord connection is incomplete. The INPUT SELECTOR knob is not set correctly. The VOLUME knob is set to minimum. • The SPEKAERS knob is set to OFF. • Setting of the SPEAKERS knob is incorrect. Setting of the POWER AMP DIRECT button is incorrect. The MUTE function is activated. Sound is heard from left or right speakers only. Speaker connection is incomplete. Setting of the BALANCE knob is 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 Howling occurs when sound record player. volume is increased during record playing. The record player is placed on a rack or floor that is easily vibrated. Actions Check the power cable connections. Turn the INPUT SELECTOR knob or press the POWER ON button on the remote controller. If the STANDBY indicator is flashing, turn the power OFF, then ON again after 1 minute or more. Check the speaker cable connection. Check the input cable connection. Set the INPUT SELECTOR knob properly. Turn the VOLUME knob to the proper level. Set the SPEAKERS knob properly according to the SPEAKER terminals to which the speakers are connected. Set the POWER AMP DIRECT button properly. If the MUTE indicator is lit, press the MUTE button on the remote controller to release the MUTE function. Check the speaker connections. Set the BALANCE knob properly. Make connections properly. Check the connections to the PHONO GND terminal. Check the connection to the PHONO input jacks. Place the TV set or record player in another position. Place the speakers away from the record player as far as possible. If an insulating pad is not supplied with the record player, use an insulating pad available in the market. 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. In this case, either the MUTE indicator flashes, or the STANDBY indicator above the POWER ON/OFF button flashes. at poWer oN For about 8 seconds after the power is turned on, the protective circuit is activated muting the sound to give the amplifier circuits time to stabilize. Once the amplifier circuits stabilize, the protective circuit releases and audio is enabled. iN the eVeNt oF oVercurreNt The protective circuit is activated if current exceeding a certain level is detected, which can happen if excessive signal flow is input to the amplifier or if the unit is connected to a speaker system of less than 4Њ impedance. The protective circuit is also activated if a speaker cable shorts. 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. Moreover, if the overcurrent continues, the amplifier's power shuts OFF and the STANDBY indicator above the POWER ON/OFF button flashes. iF eXcessiVe ultra-Bass sigNals are iNput The protective circuit is also activated if ultrabass signals that exceed the base signal range settings are input. In this case, 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 excessive 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. iF the maiN-ampliFier oVerheats 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. iN the eVeNt oF ampliFier trouBle 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 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. remote coNtroller operatioN trouBleshootiNg others 13