T+A POWER PLANT MK I, User Manual

Page: 37 / 44

37
No output signal at the
loudspeakers;
the LED
above the     button
flashes (the PROTECTION
circuit has tripped).

 

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.
Unit switches off repeatedly
at fairly high volume levels.

 

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
.
Flat sound image,
insufficient bass response.
   
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.