Operation Manual

Troubleshooting Page 41
Symptom working state Possible problems Solution
No signal Mains fused released
Check/replace mains fuse
No signal No mains fuse connection
Check mains switch, plugs and socket
No signal Power mode switch in OFF position
Switch MODE switch to AUTO or ON
No signal No input signal Check input connections, exchange
RCA connector, check source signal (is
a different audio component fed by the
same source playing correctly?)
Output level too low
(speaker cable)
One channel inverted
Disconnect one channel, is the bass
level higher now? Connect 2
nd
channel
again, but now with inverted polarity,
check cables for polarity error
Output level too low
(RCA jack)
Output level from source is too low (pre-
amp, surround decoder)
Increase output level of pre-amp (min
0.2 Volts), reduce power amp again for
compensation or: slightly reduce again
for main (centre, effect) speakers, for
compensation increase master volume
max output slightly too low
(living-room)
Placement of subwoofer too „open“ Place subwoofer in front of a wall or a
corner.
Uneven sound Unfavourable polarity Switch polarity, if no signal difference,
move subwoofer by 0.5 – 2m and re-
peat.
Sound during loud tracks
somewhat distorted espe-
cially in surround mode loud
buzzing noises
Overdrive of centre or effect speakers
and their power amps Reduce centre or effect level at surround
decoder; use centre mode ‘normal’
Loud hum Contact problems with RCA connector
(adapter for extensions)
Check all connections; reduce the level
an ELAC sub to -30dB; the outer rings of
the RCA plugs may have to be re-
adjusted.
Soft hum (during pauses) Hum for source, ground loop with RCA
multi-connections
Check of ELAC sub for inherent hum:
switch MODE to OFF, disconnect all
inputs, switch to ON, normal settings.
Now, with the ear near the speaker there
may be a soft hum, but none at the
listening place.