Conrad Electronic XCA 1000 Manuel D'utilisation page 43

Problem:
The indicator LED
PROTECTION (5)
lights, but a tone
cannot be heard:
One channel does
not function:
Disturbing noise:
The device turns
on and off during
operation:
The playback is
given without
basses:
The playback is
given without
mid-high-ranges:
Repairs other than those just described should only be performed
by an authorised electrician.
42
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Solution:
• The short-circuit protection of the amplifier has been
triggered due to a short circuit at the loudspeaker output.
• The temperature protection of the amplifier has been
triggered due to overheating. Allow the device to cool down.
• Check the cinch connections IN (7).
• 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.
• Bad ground connection of the ground cable, remove possi-
ble 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.
• Bad mass contact of the mass connection cable, the mass
point of the cable or of the battery terminal corrodes.
• Too low voltage applied at the B+ connection of the con-
nection terminal for the power supply, the mass point of the
cable or of the battery terminal corrodes, battery too weak.
• Intermittent contact at the REMOTE cable, REMOTE or
REM connection of the connection terminal for the power
supply shows intermittent contact or is corroded.
• One loudspeakers is connected in the wrong way.
• The bass control unit of the car radio is set to minimum.
• The active duplexer is not set correctly.
• The active duplexer is not set correctly.
• The high-range control unit of the car radio is set to
minimum.