Conrad CRUNCH Fat Boy Notice D'emploi page 40

One channel does not function:
• Check the LINE INPUT (9) connections.
• Check the connection of the loudspeakers to the connecting terminals SPEAKER OUTPUT (10).
• The balance control on the car radio is not set to the central position.
Disturbing noise:
• A bad earth connection of the earthing cable. Remove any rust or paint from the contact surfaces.
• The earthing point of the car radio and of the amplifier are not on the same potential, test different earthing points.
• The cables of the amplifier are positioned too close to the cables for the ignition system of the vehicle.
• The ignition system is not shielded.
• The cables of the amplifier input are installed too close to the power supply cables.
The amplifier switches on and off during operation:
• Bad earth contact of the earth connection cable, the mass point of the cable or of the battery terminal corroded.
• Voltage applied at the +12V (13) connection of the connection terminal for the power supply too low, the mass
point of the cable or of the battery terminal corroded, battery too weak.
• Intermittent contact at the remote cable, REM (14) connection of the connection terminal for the power supply
shows intermittent contact or is corroded.
Playback is without bass:
• One loudspeakers is connected the wrong way round.
• The bass control on the car radio is set to minimum.
• The active switch is not set correctly.
The playback is given without mid-high-ranges:
• The active switch is not set correctly.
• The high-range control of the car radio is set to minimum.
Repairs other than those described above should only be performed by an authorised
specialist.
40