T+A Elektroakustik POWER PLANT balanced Betriebsanleitung Seite 37

No sound is reproduced
from the source devices
connected to Disc/MP,
A2/TV or A3/Tuner.
   
No output signal at the
loudspeakers; the LED
above the   button
 
flashes (the PROTECTION
circuit has tripped).
   
Unit switches off repeatedly
at fairly high volume levels.
Flat sound image,
insufficient bass response.
Cause:
One of the change-over switches on the back of the machine, used to select the
input, is not in the correct position.
Remedy:
To use the Cinch inputs the switches must be set to "off", otherwise the
symmetrical inputs are selected.
Cause 1:
The PROTECTION circuit has tripped due to overheating or overloading.
Remedy:
Reduce volume and wait for about 20 seconds. If the unit does not switch on
again automatically, it has become too hot and should be left switched off for a
few minutes to cool down.
Cause 2:
Short-circuit in the speaker leads, e. g. stray wire ends touching at the speaker
terminals, or mechanical damage to the cables.
Remedy:
Check speaker leads and terminals, twist wire ends together neatly, replace
damaged cables.
Cause 3:
Overloading due to poor earth contact.
Remedy:
Disconnect input cable and wait to see if the amplifier switches back on again; if
so, check the input lead and replace if necessary.
Cause 1:
Overheating due to heat build-up.
   
Remedy:
Set up the unit in such a way that an unobstructed flow of cooling air is
guaranteed.
Cause 2:
Overheating through insufficient loudspeaker impedance.
Remedy:
Use only loudspeakers of at least 4 Ω impedance (DIN rating). That means a
minimum impedance of > 3.2 Ω.
Cause:
The loudspeaker cables are connected with reversed polarity.
   
Remedy:
Check the speaker connections at the loudspeakers and at the integrated
amplifier's speaker terminals; correct if necessary.
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