Arcam Delta 150 NICAM - Manual (Page 14)

Delta 150 NICAM stereo TV tuner handbook
Faults and their likely causes
IMo picture or sound. Check that;
1. the unit(s) are turned on and plugged into working
mains outlets.
2. the Delta 150 is not in the 'standby' mode (all lights off
except the green power LED). If so, press the standby button on the
remote control, or briefly switch the unit off and on again with the
power switch on the right side of the front panel.
3. your Delta 150 and/or TV has stored the TV
station correctly.
4. the chosen TV station is broadcasting at the time.
Picture OK, but no sound. Check that;
1. the Delta 150 is not in the mute mode. If so, press the
mute button on the remote control, or briefly switch the unit on and off
again with the mains power switch.
2. the variable audio output of the Delta 150, if in use, is
turned up (use the remote control).
3. the amplifier is switched on, set to the correct input and
that the volume is turned up.
4. the audio leads between the Delta 150 and your amplifier
are properly connected.
5. the loudspeakers are connected correctly.
Sound from one channel only. Check that.
1. the balance control on the amplifier is positioned centrally.
2
.
the audio leads are fitted correctly, and the wiring is not
faulty. Check by interchanging left and right leads.
3. both loudspeakers are connected correctly to the
amplifier's output terminals.
Sound OK, but no picture. Check that;
1. your TV set is selecting the correct channel.
2. if using SCART - SCART lead (Eurocable), the external
input has been selected on the TV/VCR.
3. the video cables to the TV are plugged in and
connected correctly.
Sound OK, but poor picture. Check that;
1. all the aerial (RF) plugs are pushed home firmly in their
sockets and are correctly fitted to their co-axial cables. If the outer
braiding (earth) of the cable is allowed to come into contact with the
central core of the cable, or the centre pin of the plug, this will result in a
very poor picture.
2. mutual interference is not being caused between TV
stations broadcasting between channels 30-40 and the remodulated
outputs from the Delta 150, VCR ora satellite receiver Careful retuning
of some or all of the remodulators fitted to these devices may be
necessary to effect a cure.
3. patterning of an otherwise clear picture may be caused by
(2) above or by cross modulation distortion in the tuner head of your
Delta 150, VCR or TV This is due to excessive signal levels and may
usually be controlled with simple in-line co-axial attenuators fitted in the
aerial leads between the units.
4. persistent hues near the corners of your TV picture may be
caused by your hi fi speakers being too close to the TV screen. The
speakers' powerful magnets affect the colour purity of the TV tube.
Move the speakers further away and turn the TV on and off again in
order to activate its degaussing circuits until the problem is solved.
Picture OK, but interference (crackling) on
NICAM sound
The NICAM digital signal is very robust and can normally be
received cleanly, even with a weak signal which gives an unacceptably
noisy picture.
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