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Problem: Solution:
The indicator LED • The volume control unit of the car radio is set to minimum.
POWER (5) lights, but a •
The
GAIN
control unit (3) of the amplifier is set to minimum.
tone cannot be heard: • The loudspeakers are not properly connected.
The indicator LED • The short-circuit protection of the amplifier has been
PROTECTION (5) triggered due to a short circuit at the loudspeaker output.
lights, but a tone • The temperature protection of the amplifier has been
cannot be heard: tr
iggered due to overheating. Allow the device to cool down.
One channel does • Check the cinch connections IN (7).
not function: • Check the connection of the loudspeakers to the connec-
tion terminals and at the loudspeakers themselves.
• The balance control at the car radio is not set to its centre position.
Disturbing noise: • Bad ground connection of the ground cable, remove possible rust or
colour from the contact surfaces.
• The mass point of the car radio and of the amplifier are not at the same
potential, test different mass 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 positioned too close to the power
cables.
The device turns • Bad mass contact of the mass connection cable, the mass
on and off during point of the cable or of the battery terminal corrodes.
operation: • Too low voltage applied at the +12V connection of the connection termi-
nal for the power supply, the mass point of the cable or of the battery ter-
minal corrodes, battery too weak.
• Intermittent contact at the REMOTE cable, REMOTE connection of the
connection terminal for the power supply shows intermittent contact or is
corroded.
The playback is • One loudspeakers is connected in the wrong way.
given without • The bass control unit of the car radio is set to minimum.
basses: • The active duplexer is not set correctly.
The playback is • The active duplexer is not set correctly.
given without • The high-range control unit of the car radio is set to
mid-high-ranges: minimum.
Repairs other than those just described should only be performed by an authorised
electrician.
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