BANG&OLUFSEN MX4500
Manual de Servicio

Controls and indicators
This unit has the following switch and indicators. The power indicator and the STANDBY indicator will let you know the status of this unit. POWER switch
Press to turn the power ON/OFF.

In case of difficulty
7Operation to reset
The microcomputer may malfunction when the power cord is unplugged while power is ON or due to an external factor. In this case, execute the following procedure to reset the microcomputer and return it to normal condition. � Unplug the power cord from the AC outlet and, while holding the POWER switch depressed, plug the power cord into the AC outlet again.

STANDBY indicator*
Lights when this unit is in Standby mode. Will blink if the internal thermal protection circuitry is activated.

Power indicator
Lights while the power is ON.

7Troubleshooting
Symptom
BRIDGEABLE POWER AMPLIFIER

Cause � The speaker cords are disconnected. � The audio cords are disconnected. � The STEREO/BTL switch is not set properly. � Speaker cords are shortcircuited. � The internal temperature of the unit rose and the protection circuitry was activated.

Remedy � Connect them properly referring to �Connections�. � Connect them properly referring to �Connections�. � Set it properly referring to �Connections�. � Turn the power OFF, eliminate the short-circuiting, then turn ON the power again. � Turn the power OFF and wait until the internal temperature drops. After ensuring that the temperature has dropped, turn the power ON again. As the current installation condition may not be appropriate, improve it following the �Notes on heat generation�. � Connect it between this unit and the KENWOOD receiver (such as the Kenwood Sovereign VR-5900 receiver).

Sound is not output from one or all speakers.

*: The STANDBY indicator is activated only when the supplied mini-plug cord is connected between this unit and the KENWOOD receiver (such as the Kenwood Sovereign VR-5900 receiver). The STANDBY indicator will light when the KENWOOD receiver is turned OFF and it will go out when the KENWOOD receiver is turned ON. When the supplied mini-plug cord is not used, the STANDBY indicator does not work.

The STANDBY indicator blinks and sound is not output.

712 V Relay power control
The MX-5000 can be powered on and off by a 12 volt trigger signal from a compatible component (such as the Kenwood Sovereign VR-5900 receiver).

1 Make sure that the MX-5000�s power cord is unplugged from the wall outlet before mak2 Connect the supplied mini cable to the MX-5000�s RELAY CONTROL input and the 12 V
relay control output of the VR-5900 or other compatible component. � When the MX-5000�s POWER switch is turned ON, the amplifier will remain in the STANDBY mode (the STANDBY indicator will be lit) as long as there is no signal at the RELAY CONTROL input. � The MX-5000 will automatically turn ON when a 12 V signal is applied to the RELAY CONTROL input. � When the 12 V signal is removed from the MX-5000�s RELAY CONTROL input, the amplifier will go back into the STANDBY mode. � If there is no cable connected to the MX-5000�s RELAY CONTROL input, the amplifier�s STANDBY indicator will not function, and its ON/OFF status will be controlled by the POWER switch. ing any connections.

STANDBY indicator does not lights.

� The cord for RELAY CONTROL is not connected.

7 EN