Operation Manual

35
Problem Possible cause Solution
Subwoofer
does not turn
on
1. The power cable is not connected from the socket to the
subwoofer
Check connection
2. The power has not been turned on Switch to “ON”
3. The switch for automatic switching on is not in the “ON”
position or the “AUTO” or “AUTO HIGH” positions
Check switch setting
4. The subwoofer is not connected with the amplifier (re-
ceiver) through its speaker outlet (High Level) or subwoofer
outlet (cinch) cable
Check connection
5. Defective signal line (cinch) Test with another cinch cable and change cable if necessary
6. The volume of the amplifier has been set too low
Increase volume level to test
7. With a “Dolby Digital” receiver (amplier): the receiver is
not set for subwoofer operation (operating method “Small”
or “ActiveSub = On”)
Check operating mode
8. The outlet level on the amplifier is set too low for the
subwoofer outlet (cinch outlet)
Increase the outlet level of the amplifier
9. The microfuse in the subwoofer has blown (fused) Get a specialist to change the microfuse
Subwoofer
does not
switch off
1. Switch for automatic switching on (Standby) set to “ON” Switch to “Auto” or “OFF”
2. Constant humming at inlet of subwoofer
Use a shorter signal line from the amplifier to the subwoofer or remove any possible sources of
interference (see “Subwoofer hums”)
Subwoofer
hums
1. Signal line from amplifier to subwoofer too long
Use shorter signal line
2. Signal line used is not fault-protected or the protection
has been damaged (defective)
Change signal line for a fault-protected line
3. Ground loop (ripple pickup) generated A ground loop can be generated when two or more devices connected via a signal line (cinch)
are plugged into separate sockets (e. g. amplifier and computer). All devices connected to the
amplifier should be plugged into the same multiple socket outlet
4. Another piece of equipment on the same circuit has no
interference suppression (e. g. fridge)
Switch off possible sources of interference to test; unplug the device concerned to see if the
humming noise disappears or connect the source of interference to a different circuit (L1, L2
or L3). (Where necessary take advice from your electrician.) Insert a special “ferrite common
mode lter” (available from specialist retailers) between the amplier and the subwoofer to
eliminate the humming. Disconnect and rotate the mains plug to reduce the so-called ripple
voltage. (Particularly important if the amplifier is not earthed)
Subwoofer
does not
respond to
remote control
1. The battery is flat Change the battery
2. The remote control is not registered on the subwoofer Turn the subwoofer off, wait for 30 seconds then turn it back on. Activate the remote control
and press the “- Phase”, “+ Phase” and “Power/Auto” buttons in quick succession. The sub-
woofer and the remote control are now synchronised
ENG