Roberts Radio Radio RD 20 User Guide

RD-20  
FM RDS/DAB digital radio  
Please read this manual before use  
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Controls  
(Top)  
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2
3
4
5
6
7
8
9
10  
11  
18  
17  
16  
15  
14  
13  
12  
1. Telescopic aerial (on rear)  
2. On/Off button  
7. Line out socket (on rear)  
8. FM/DAB button  
9. +5 button  
13. Tuning up button  
14. Tuning down button  
15. Liquid crystal display (LCD)  
16. Treble control  
3. Mains LED indicator  
4. Station presets  
10. Info button  
5. Headphone socket (on rear)  
6. Auto Tune button  
11. Select button  
12. Tuning control  
17. Bass control  
18. Volume control  
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2
020 8758 0338 (Mon-Fri)  
Battery operation  
1. Remove the Battery cover on the rear of the unit by pushing the  
battery door in and downwards. .  
2. Insert six LR20 (D size) batteries into the spaces in the compartment.  
Take care to ensure all batteries are inserted with the correct polarity  
as shown inside the battery compartment. Replace the battery cover.  
3. Reduced power, distortion and a ‘stuttering’ sound are all signs that  
the batteries may need replacing.  
4. If the radio is not to be used for any extended period of time it is  
recommended that the batteries are removed from the radio.  
We would recommend for economy that the RD-20 is used on the  
mains whenever possible with battery operation for occasional or  
stand-by use only.  
IMPORTANT: The batteries should not be exposed to excessive  
heat such as sunshine, fire or the like. After use, disposable  
batteries should if possible be taken to a suitable recycling centre.  
On no account should batteries be disposed of by incineration.  
Mains operation  
1. Place your radio on a flat surface.  
2. Plug the mains lead into the Socket located on the rear of your radio  
ensuring that the plug is pushed fully into the socket.  
3. Plug the other end of the mains lead into a wall socket and switch  
on the wall socket.  
IMPORTANT: The mains plug is used as the means of connecting  
the radio to the mains supply. The mains socket used for the radio  
must remain accessible during normal use. In order to disconnect the  
radio from the mains completely, the mains plug should be removed  
from the mains socket outlet completely.  
4. When the mains LED is off, it indicates that the radio is completely  
disconnected from the mains.  
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3
Operating your radio - DAB  
2
1. Fully extend the telescopic aerial  
2. Press the On/Off button to switch on your radio. The display will  
show "Roberts DAB digital radio" for a few seconds.  
3. If this is the first time the radio is used a quick scan of the UK band  
III DAB channels will be carried out. The display will show "Autotune  
Quick scan". If the radio has been used before the last used station  
will be selected.  
4. During Autotune as each group of stations is detected the bottom  
line of the display will show its name and the station count will be  
updated. The top line of the display shows a bargraph indicating  
progress of the Autotune.  
5. When the Autotune is complete the first station (in numeric-alpha  
order 0...9...A....Z) will be selected.  
6. If the station list is still empty after the Autotune you radio will display  
"No Signal".  
7. If no signals are found it may be necessary to relocate your radio  
to a position giving better reception.  
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Selecting a station - DAB  
1. The top line of the display shows the name of the station currently  
selected.  
2. Rotate the Tuning control or press the Up or Down buttons to scroll  
through the list of available stations.  
2
2
3. Press and release the Select button to select the station. The display  
2
may show "Tuning" while your radio finds the new station.  
4. Adjust the Volume and Tone controls to the required settings.  
Note: If after selecting a station the display shows "Not Available"  
it may be necessary to relocate your radio to a position giving better  
reception.  
3
4
4
4
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5
Secondary services - DAB  
1. Certain radio stations have one or more secondary services associ-  
ated with them. If a station has a secondary service associated with  
it the display will show ">" next to the station name on the station list.  
The secondary service will then appear immediately after the primary  
service as you turn the tuning control.  
Display modes - DAB  
a
1
Your radio has five display modes:-  
1. Press the Info button to cycle through the various modes.  
a. Scrolling text  
Displays scrolling text messages such  
as artist/track name, phone in number  
etc.  
b
c
b. Program Type Displays type of station being listened to  
e.g. Pop, Classic, News etc.  
c. Multiplex Name Displays name of multiplex to which  
current station belongs.  
d. Signal strength Displays signal strength for station being  
listened to.  
d
e. Time and date Displays current time and date.  
e
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Finding new stations - DAB  
As time passes new stations may become available. To find new stations  
proceed as follows:-  
1
1. Press and release the AutoTune button, the display will show  
Autotune Quick scan. Your radio will perform a scan of the UK DAB  
frequencies. As new stations are found the station counter on the  
right-hand side of the display will increase and stations will be added  
to the list  
2. To carry out a full scan of the entire DAB band III frequencies press  
and hold down the AutoTune button for more than 2 seconds and  
then release. The display will show Autotune Full scan. As new  
stations are found the station counter on the right-hand side of the  
display will increase and stations will be added to the list  
2
Autoselect - DAB  
As an alternative to pressing the Select button to select a station your  
radio can be set so as to automatically select a station.  
1
1. Rotate the Tuning control a few clicks in either direction, immedi-  
ately press and hold down the Select button until the display shows  
Autoselect ON.  
2. Rotate the Tuning control or press the Up or Down buttons until the  
station you require is visible on the display. After a few seconds your  
radio will automatically select the station shown on the display.  
3. To switch off autoselect rotate the Tuning control a few clicks in  
either direction, immediately press and hold down the Select button  
until the display shows Autoselect OFF.  
1
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7
Manual Tuning - DAB  
1
Manual tuning allows you to tune directly to the various band III DAB  
channels. UK DAB stations are currently located in the range 11B to 12D.  
1. Press and hold down the Select button until the display shows  
Manual tune. Release the Select button.  
2
2. Rotate the Tuning control or press the Up or Down buttons to  
select the required DAB channel.  
3. Press and release the Select button to select the channel.  
2
4. Rotate the Tuning control or press the Up or Down buttons to  
select the stations contained within the Multiplex (group of stations)  
for the selected DAB channel.  
3
2
5. Press and release the Select button to return to normal tuning  
mode.  
Signal strength display - DAB  
1. Repeatedly press and release the Info button until the lower line  
of the display shows signal strength - see diagram.  
1
2. Your radio can now be positioned for best reception using the signal  
strength display as guide. Move your radio around and position your  
radio so as to give maximum number of black rectangles on signal  
strength display.  
3. The clear unfilled rectangle indicates minimum signal level required  
for satisfactory reception.  
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8
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Operating your radio - FM  
2
3
1. Carefully extend the telescopic aerial  
2. Press the On/Off button to switch on your radio. The display will  
show "Roberts DAB digital radio" for a few seconds.  
4
4
3. Press the FM/DAB button to select the FM band.  
4. Press and hold down either the Up or Down buttons until the  
frequency in the display begins to change rapidly. Release the  
button. Your radio will scan the FM waveband, stopping each time  
it finds a station of sufficient strength.  
5. After a few seconds the display will update and show station name.  
6. To find other stations press hold down the Up or Down button as  
before.  
8
8
7. When the waveband end is reached your radio will recommence  
tuning from the opposite waveband end.  
8
8. Adjust the Volume and Tone controls to the required settings.  
9. To switch off your radio press the On/Off button.  
9
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9
Manual tuning - FM  
1
3
2
3
1. Press the On/Off button to switch on your radio.  
2. Press the FM/DAB button to select the FM band. Fully extend the  
Telescopic aerial .  
3. Rotate the Tuning control or press the Up or Down buttons to tune  
to a station. The frequency will change in steps of 50kHz.  
3
4. When the waveband end is reached the radio will recommence  
tuning from the opposite waveband end.  
5. Set the Volume control and Tone controls to the desired settings.  
6. To switch off your radio press the On/Off button.  
5
5
5
6
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Display modes - FM  
a
1
On FM the bottom line of the display can be set to any of the following  
modes:-  
b
c
1. Press the Info button to cycle through the various modes.  
a. Scrolling text  
Displays scrolling text messages such as artist/  
track name, phone in number etc.  
b. Program Type Displays type of station being listened to e.g.  
Pop, Classic, News etc.  
d
c. Signal strength Displays signal strength for station being listened  
to.  
e
f
d. Time and date Displays current time and date.  
e. Frequency  
Displays frequency of the station being listened  
to.  
f. Audio mode  
Display shows Auto (stereo) or mono.  
FM Stereo/Mono  
1. If a station being received is weak some hiss may be audible. To  
reduce the hiss press and hold in the Select button until the display  
shows Audio mode : Mono, your radio will switch to mono mode.  
1
2. To return to stereo mode press and hold in the Select button until  
the display shows Audio mode :Auto, your radio will switch to  
stereo mode.  
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11  
Presetting stations - DAB and FM  
1
There are 10 memory presets for each of the 2 wavebands.  
1. Press the On/Off button switch on the radio.  
2. Tune to the required station as previously described.  
3. Press and hold down the required Preset button until the display  
shows e.g. Preset 1 stored. The station will be stored under the  
chosen preset button. Repeat this procedure for the remaining  
presets.  
3
4. Presets 6 to 10 are obtained by pressing +5 followed by Preset  
button 1 to 5. e.g preset 7 can be set by pressing +5 followed by  
holding down Preset button 2 until the display shows Preset 7  
stored.  
5. Stations stored in preset memories may be overwritten by following  
the above procedure.  
4
4
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020 8758 0338 (Mon-Fri)  
Recalling a preset station - DAB and FM  
1
2
1. Press the On/Off button to switch on the radio.  
2. Select the required waveband by pressing the FM/DAB button.  
3. Momentarily press the required Preset button, your radio will tune  
to the station stored in preset memory.  
3
4. Presets 6 to 10 are obtained by pressing +5 and Preset button 1  
to 5. e.g preset 7 can be recalled by pressing +5 followed by Preset  
button 2  
4
4
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13  
System reset  
1
2
If your radio fails to operate correctly, or some digits on the display are  
missing or incomplete carry out the following procedure.  
1. Switch off your radio  
2. Switch on your radio - before the screen shows Roberts DAB digital  
radio press and hold down the Select button until the display  
shows System Reset.  
2
3. A full reset will be performed all presets and station lists will be  
erased.  
4. If DAB was used last then a quick scan of the UK band III DAB  
channels will be carried out, otherwise a quick scan of the UK band  
III DAB channels will be carried out out the next time the DAB band  
is selected.  
If a problem persists our technical staff would be pleased  
to help offer any assistance on operating the radio. Our  
technical helpline number is 020 8758 0338.  
If you need any further advice, please call our Technical Helpline on :-  
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14  
020 8758 0338 (Mon-Fri)  
Headphone socket  
A 3.5mm Headphone Socket located on the rear of your radio is  
provided for use with either headphones or an earpiece. Inserting a plug  
automatically mutes the internal loudspeaker.  
IMPORTANT: Excessive sound pressure from earphones and head-  
phones can cause hearing loss.  
Line out socket  
A 3.5mm Line out socket located on the rear of your radio is provided  
for connecting the audio signal to an external amplifier. Inserting a line  
out audio cable will not mute the internal loudspeaker. Set the volume  
control to minimum if desired.  
Display backlight  
1. When your radio is powered by batteries the display backlight will  
be switched on for approximately 12 seconds when any button is  
pressed.  
2. When your radio is powered by AC mains the display backlight will  
always be switched on.  
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15  
No objects filled with liquids such as vases, shall be placed on  
the radio.  
General  
Do not allow this radio to be exposed to water, steam or sand. Do not  
leave your radio where excessive heat could cause damage such as in  
a parked car where the heat from the sun can build up even though the  
outside temperature may not seem too high. It is recommended that the  
DAB band be used wherever possible as better results in terms of quality  
and freedom from interference will usually be obtained than on the FM  
band.  
It is recommended to operate the product such that there is a minimum  
distance (10cm recommended) to adjacent objects in order to  
ensure good ventilation.  
The ventilation of the product should not be restricted by covering  
it or its ventilation openings with items such as newspapers, table-  
cloths, curtains etc.  
No naked flame sources such as lighted candles should be placed  
on the product.  
In case of misfunction due to electrostatic discharge reset your radio  
following the proceedure on page 14 (reconnect of power source may  
be required) to resume normal operation.  
It is recommended to avoid using or storing the product at extremes  
of temperature. Avoid leaving the unit in cars, on window sills in  
direct sunlight etc.  
The nameplate is located on the underside of your radio.  
Specifications  
Power Requirements  
Circuit Features  
Loudspeaker  
Mains  
AC 230 volts, 50Hz  
6 x LR20 (D size)  
only  
2 x 79mm 4ohms  
3W into 4ohms  
Batteries  
Output Power  
Battery Life  
Approx. 28 hours of listening for 4 hours a day  
at normal volume using alkaline cells.  
Headphone socket  
Line out socket  
3.5mm dia  
3.5mm dia  
Frequency Coverage  
Aerial System FM  
Telescopic aerial  
FM  
87.5-108MHz  
DAB 174.928 - 239.200MHz  
DAB Telescopic aerial  
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16  
020 8758 0338 (Mon-Fri)  
Mains supply  
The RD-20 will operate from a supply of AC 230 volts, 50Hz  
only.  
The wire coloured BLUE must be connected to the terminal marked N or  
coloured BLACK.  
DO NOT cut off the mains plug from this equipment. If the plug  
fitted is not suitable for the power points in your home or the cable is too  
short to reach a power point, then obtain an appropriate safety approved  
extension lead or adaptor. If in doubt consult your dealer.  
The wire coloured BROWN must be connected to the terminal marked L  
or coloured RED.  
If nonetheless the mains plug is cut off, remove the fuse and dispose of  
the plug immediately to avoid a possible shock hazard by inadvertent  
connection to the mains supply.  
If this product is not supplied with a mains plug, or one has to be fitted,  
then follow the instructions given below:  
IMPORTANT. DO NOT make any connection to the larger terminal which  
is marked with the letter E or by the safety earth symbol  
Green or Green-and-yellow.  
or coloured  
The wires in the mains lead are coloured in accordance with the following  
codes :-  
BLUE - NEUTRAL  
BROWN - LIVE  
Fuse  
When replacing the fuse only a 3A ASTA approved to BS1362 type  
should be used and be sure to re-fit the fuse cover.  
IF IN DOUBT - CONSULT A QUALIFIED ELECTRICIAN.  
Replacement fuse holders are available from Roberts Radio Technical  
Services at the address shown on the rear of this manual.  
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17  
Guarantee  
This instrument is guaranteed for twelve months from the date of delivery to the original owner against failure due to faulty workmanship or component  
breakdown, subject to the procedure stated below. Should any component or part fail during this guarantee period it will be repaired or replaced free  
of charge.  
The guarantee does not cover:  
1. Damage resulting from incorrect use.  
2. Consequential damage.  
3. Receivers with removed or defaced serial numbers.  
N.B. Damaged or broken telescopic aerials will not be replaced under guarantee.  
Procedure:  
Any claim under this guarantee should be made through the dealer from whom the instrument was purchased. It is likely that your Roberts' dealer  
will be able to attend to any defect quickly and efficiently, but should it be necessary the dealer will return the instrument to the company’s service  
department for attention. In the event that it is not possible to return the instrument to the Roberts' dealer from whom it was purchased, please contact  
Roberts Radio Technical Services at the address shown on the rear of this manual.  
If you need any further advice, please call our Technical Helpline on :-  
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18  
020 8758 0338 (Mon-Fri)  
ROBERTS RADIO TECHNICAL SERVICES  
97-99 Worton Road  
Isleworth Middlesex  
TW7 6EG  
Technical Helpline :- 020 8758 0338 (Mon-Fri during office hours)  
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Issue2  

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