Troubleshooting - Conrad Electronic FS8 Notice D'emploi

14. Troubleshooting

By purchasing the Raveland Flatsub FS8 Active Subwoofer, you have acquired a state-of-the-art product which
operates reliably. Nevertheless, problems or malfunctions may occur. For this reason, the following is a description
of how you can eliminate possible malfunctions yourself.
Please observe the safety instructions!
No function, the POWER indicator (6) does not light up:
• The GND connection of the terminal (7) is not connected to the car body.
• The REM connection of the terminal (7) is not connected to the aerial control output of the car radio (only applies
when the POWER MODE switch (1) is set to REMOTE WIRE).
• The car radio does not play any sound via the loudspeakers (only applies when the POWER MODE switch (1)
is set to AUTO POWER).
• The +12V connection of the terminal (7) is not supplied with +12 V.
• The protective circuit of the subwoofer has been activated due to a malfunction.
• The temperature protection circuit of the subwoofer has been activated due to overheating. Allow the device to
cool down.
• The FUSE (8) of the subwoofer or the fuse in the positive line is defective.
The POWER indicator (6) lights up, but there is no sound:
• The volume control of the car radio is set to the minimum.
• The LEVEL control (2) of the subwoofer is set to the minimum.
• The input is not connected correctly.
There is background noise:
• The earthing cable is not connected properly. Remove any rust or paint from the contact surfaces.
• The earthing point of the car radio and of the subwoofer are not on the same potential, try different earthing points.
• The cables of the subwoofer are positioned too close to the cables of the ignition system of the vehicle.
• The ignition system is not shielded.
• The cables of the input are installed too close to the power supply cables.
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