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Trouble shooting
Many problems have a simple cause which is simple to
put right.
In this section we list a number of possible problems
together with the method of eliminating them.
If you meet a problem which cannot be sorted out using
these notes, then please disconnect the mains supply at
the wall socket and contact an authorised service
workshop without delay.
Problem: The CC 820 M responds correctly
when the buttons are pressed, but
cannot be remote-controlled.
Cause 1:
Batteries in the remote control unit
inserted incorrectly or flat.
Remedy:
Insert batteries correctly and/or replace
with new cells.
Cause 2:
No visual contact between system and
remote control handset.
Remedy:
Make sure that the remote control
transmitter has direct line-of-sight con-
tact with the receiver - note that glass
doors can interrupt the connection.
Maximum range between transmitter
and receiver: approx. 6 metres.
Be sure to position the remote control
receiver (located in the display) where it
is not subjected to direct sunlight or very
bright artificial light.
Fluorescent tubes and energy-saving
lamps are powerful sources of interfer-
ence.
Cause 3:
The cassette recorder is not selected as
the current listening source (TAPE 1) on
the PT 820 M, i. e. the remote control
commands are being passed to some
other device in the 'M'-system instead of
the cassette recorder.
Cause 4:
M
LINK
cable not connected correctly.
Remedy:
Check and push connector in firmly.
Problem: The display shows 'NO TAPE' when
you close the tray.
Cause:
There is no cassette in the tray.
Problem: The tape deck refuses to record.
Ursache:
The write protect tab on the rear face of
the cassette has been broken out.
Remedy:
Seal the slot with a piece of adhesive
tape.
Problem: On playback the sound fluctuates or
is distorted.
Cause 1:
Record level set too high / bias level set
too low.
Remedy:
Adjust levels and repeat the recording.
Cause 2:
Heads dirty.
Remedy:
Use a head cleaning cassette after
every 10 hours or so of use. The proce-
dure is described in the instructions
supplied with the cleaning cassette.
Problem: Audible background hiss or unnatural
sounding reproduction on playback.
Cause 1:
The DOLBY noise reduction system
used for playback is not the same as
that used for the recording.
Remedy:
Select the DOLBY noise reduction
system which was used for recording.
Cause 2:
Heads dirty.
Remedy:
Clean the heads using a cleaning cas-
sette (see above).
Cause 3:
The heads and metal parts are mag-
netised.
Remedy:
The heads and other metal parts which
come into contact with the tape should
be de-magnetised after about 20 - 30
hours' use. Degaussing cassettes are
available commercially for this purpose.
Note:
A thorough de-magnetising with a
special tape head degaussing unit can
be carried out by your specialist Hi-Fi
dealer.