34
Trouble shooting
Many problems have a simple cause and a correspond-
ingly 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
specialist dealer for
advice.
Problem:
Machine responds correctly when front
panel buttons are pressed, but cannot
be remote-controlled.
Cause 1:
Batteries in remote control handset
exhausted or fitted incorrectly.
Remedy:
Fit new batteries, or re-fit batteries with
correct polarity.
Cause 2:
No visual contact between remote control
transmitter and remote control receiver of
the
PT 820 M
.
Remedy:
Ensure direct visual contact between
remote control transmitter and receiver
(glass doors may prevent contact).
The maximum range of the remote control
system is about 8 metres.
Position the remote control receiver so
that it is not subjected to direct sunlight or
excessively bright lighting. Fluorescent
lamps and energy-saving bulbs are
powerful sources of interference.
Cause 3:
The DVD player is not selected as current
listening source on the pre-amplifier,
integrated amplifier or receiver, i. e. the
control commands from the handset are
being passed to another
M-
system
device.
Remedy:
Press the
(or
- see next
point) on the remote control handset, and
try again.
Cause 4:
M
LINK
cable not correctly connected.
Remedy:
Check that the lead is firmly connected.
Problem:
No sound, or distorted sound.
Cause:
Audio connection to amplifier or TV set
not correct.
Remedy:
Complete the connections as shown in
the wiring diagram; push the plugs in
firmly, check cables and replace if
necessary.
Problem:
Loud hum from the loudspeakers.
Cause:
Poor contact at the cinch plugs or a
faulty cinch lead.
Remedy:
Check all plug in connections and
cables carefully, and replace where
necessary.
Problem:
Other
machines
(Hi-Fi
units,
television, video recorder or similar)
respond to the RC signals from the
F6 system remote control handset, or
the M-system responds to the signals
from other RC units.
Cause:
There is a limited number of remote
control codes available, so conflicts may
occasionally occur with signals from
other remote control handsets.
Remedy:
The
F6
remote control handset used
with the
M-system
can be switched to a
different remote control address.
As standard both the remote control
transmitter and the
M-system
are set to
RC address 1.
Note:
The
F6
RC handset and the
M-system
must always be set to the same RC
address.
Problem:
The TUNER, CD player or recorder do
not respond to commands.
Cause:
The unit you wish to control is not
selected as the source device.
Remedy:
Press the corresponding source button
on the remote control unit and try again.
Problem:
The auditioning source can be
operated, but the system produces
no output signal.
Cause:
Loudspeaker output switched off:
'
A
A
A
A
'
or
'
B
B
B
B
'
not glowing in the display.
Remedy:
Briefly press the corresponding remote
control button
or
to
switch on the speaker output you want
to use.
Cause:
The Protection circuit has switched off
the speaker outputs;
'
A
A
A
A
'
or
'
B
B
B
B
'
flashing in
the display.
Remedy:
Reduce the volume setting; check the
speaker terminals for short circuits.