Trouble-Shooting - T+A DD 820 M User Manual

Many problems have
correspondingly simple solution. The following section
describes a few difficulties you may encounter, and the
measures you need to take to cure them.
If you find it impossible to solve a problem with the help
of these notes please disconnect the unit from the mains
and ask your authorised 
advice.
Problem: Loud humming
loudspeakers.
Cause: Poor contact between the Cinch plugs and
sockets, or a faulty Cinch cable.
Remedy: Please check all connections and cables
thoroughly.
Problem: No sound, or distorted sound.
Cause: Incorrect audio connection to amplifier or
TV set.
Check connections against wiring diagram;
Remedy:
push all connectors in firmly. Select a
different listening source when checking the
amplifier.
Problem: No sound from center, or center sound
signal too quiet.
Center speaker
Cause:
activated in 'Speaker Setup'.
Remedy: Connect center loudspeaker, or disable
center speaker in 'Speaker Setup'.
Problem: No sound from individual loudspeaker.
Cause 1: Loudspeaker not activated in 'Speaker
Setup'.
Remedy: Call up 'Speaker Setup' and enter the type
of loudspeaker connected.
Cause 2: Loudspeaker cable not connected correctly,
or short-circuit in speaker cable.
Remedy: Check connection and speaker cable,
correct if necessary.
Decoder not set to surround mode.
Cause 3:
Remedy: Call up
'SURROUND' or one of the sound fields.
Cause 4: Programme contains no information on the
auxiliary channels (e. g. stereo material).
Remedy: If you wish, call up the 'Main Menu' and
select a sound field.
The level for the channel affected is set too
Cause 5:
low.
Remedy: Call up 'Speaker Balance Setup' and raise
the level.

Trouble-shooting

a simple cause and
 specialist dealer for  
noise from
not connected,
'Main Menu' and set
a
Problem: No bass, or inadequate bass.
Cause 1: No subwoofer connected, but activated in
'Speaker Setup'.
Connect subwoofer, or disable subwoofer in
Remedy:
'Speaker Setup'.
Size of loudspeakers entered incorrectly in
Cause 2:
'Speaker Setup'.
the
Remedy: Call up 'Speaker Setup' and check that
settings match the loudspeakers in your
system; correct if necessary.
Problem: 'Main
television screen.
Cause: Screen display of 'Main Menu' switched off
in 'Device Setup'.
Remedy: Call up 'Device Setup' and switch on 'On-
screen Menu'.
Problem: Neither
external programmes appear on the TV
screen. TV only shows those stations
which are received via its own aerial.
Video lead not connected properly.
Cause :
Push in all connectors firmly.
Remedy:
but
to
61
Menu' not displayed
on-screen menu nor
on the
other