Roberts Radio R9943 User Manual

R9943

3 band PLL

Synthesised Radio

ROBERTS

Sound for Generations

Please read this manual before use

Contents

Controls .......................................................................... 2-3

Display ............................................................................... 4

Battery operation ............................................................... 5

Battery replacement .......................................................... 5

Mains operation ................................................................. 5

Setting the clock ............................................................... 6

Operating your radio .......................................................... 7

Scan tuning ....................................................................... 7

Manual tuning .................................................................... 8

Rotary tuning ..................................................................... 9

Presetting stations .......................................................... 10

Recalling a preset station ............................................... 11

Wake to buzzer alarm .................................................... 12

Wake to radio alarm ....................................................... 13

Snooze function .............................................................. 14

Sleep timer ...................................................................... 15

Display backlight............................................................. 15

Headphone socket .......................................................... 16

FM Stereo/Mono button .................................................. 16

Tuning step size .............................................................. 17

Summer time ................................................................... 18

Reset button .................................................................... 19

General ............................................................................ 19

Specifications.................................................................. 20

Circuit features ................................................................ 20

Mains Supply ................................................................... 21

Guarantee ........................................................................ 22

Important Information - please read before use

The batteries provide power for the clock/memory
backup and must be fitted at all times.

1

Controls

1 23 4 5

(Top)

6

7

1. On/Off/Sleep button

2. Light button

3. Waveband, Time set, FM Stereo/Mono button

4. Tuning Up/Down buttons

If you need any further advice, please call our Technical Helpline on :-

020 8758 0338 (Mon-Fri)

5. Telescopic aerial

6. Preset, Summer time, Tuning step and Alarm set buttons

7. LCD display

2

Controls

(Right side)

11

12

10

13

8. Headphone socket

9. Tone control

10. Volume control

11. Rotary tuning control

12. Mains input socket (on rear)

13. Battery compartment (on rear)

3

9

8

Display

4

3

2

1

5678910

11

12

1. Step indicator

2. Sleep/Snooze indicator

3. Summer time indicator

4. Stereo indicator

5. Waveband indicators

6. Frequency/Time indicators

7. Frequency units indicators

8. Alarm indicators

9. Tuning indicator

10. Memory indicator

11. Battery indicator

12. Dial scale

If you need any further advice, please call our Technical Helpline on :-

020 8758 0338 (Mon-Fri)

4

Battery operation

1. Remove the Battery cover on the rear of the unit by pushing the
catches in the direction shown by the arrows.

2. Insert four 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.

note : the batteries provide power for the clock/memory
backup and must be fitted at all times.

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 R9943 is used on the
mains whenever possible with battery operation for occasional or
stand-by use only.

Battery replacement

1. The battery indicator will appear in the display (not when connected
to mains) for 7 seconds after the radio is switched on or off. The

battery indicator will show when the batteries are new. The
batteries should be replaced when the battery indicator shows

. If the battery power is too weak to switch on the radio the

battery indicator will flash . After removing the batteries you
have approximately 3 minutes to replace the batteries after which
the clock and memory information will be lost.

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.

5

Setting the clock

1. The clock will start running when the batteries are installed or when
the radio is connected to the mains supply. The display will show
0:00 .

2. Ensure that the radio switched off.

3. Press and hold down Time set button until the hours digits begin
to flash in the display.

4. Press the Tuning up/down buttons to set the required hour. The
clock uses the 24 hour system e.g. 2:00pm is shown as 14:00

5. Press the Time set button, the minute digits will flash in the display.

6. Press the Tuning up/down buttons to set the required minute.

7. Press the Time set button to complete time setting.

If you need any further advice, please call our Technical Helpline on :-

020 8758 0338 (Mon-Fri)

6

Operating you radio

Your radio is equipped with four tuning methods:- Scan tuning, Rotary
tuning, Manual tuning, and Memory preset tuning. When switched on
your radio will display the waveband and frequency in use. A graphical
display similar to a conventional radio tuning dial will be shown in the
bottom half of the display.

Scan tuning

1. Press the On/Off button to switch on your radio.

2. Select the required waveband by repeatedly pressing the Band
button. For the FM waveband fully extend the Telescopic aerial
angle and rotate, if necessary, to obtain best reception.

3. Press and hold down either the Tuning up or Tuning down buttons
for more the 0.5 sec to commence scan tuning.

4. Your radio will scan the selected waveband and stop automatically
when it finds a station of sufficient strength. The tuning indicator

and station frequency will appear in the display.

5. To recommence scan tuning, press and hold down either the
Tuning up or Tuning down buttons for more the 0.5 sec.

6. When the waveband end is reached the radio will bleep and continue
tuning from the opposite waveband end.

7. Set the Volume control and Tone controls to the desired settings.

8. To switch off your radio press the On/Off button.

7

Manual tuning

1. Press the On/Off button to switch on your radio.

2. Select the required waveband by repeatedly pressing the Band
button. For the FM waveband fully extend the Telescopic aerial
angle and rotate, if necessary, to obtain best reception.

3. A single press on either the Tuning up or Tuning down buttons
will change the frequency in the following increments:-

FM 50kHz or 100kHz

MW 9kHz or 10 kHz

LW 9kHz

4. When a station is correctly tuned, the tuning indicator will
appear in the display.

5. When the waveband end is reached the radio will bleep and continue
tuning from the opposite waveband end.

6. Set the Volume and Tone controls to the desired settings.

7. To switch off your radio press the On/Off button.

If you need any further advice, please call our Technical Helpline on :-

020 8758 0338 (Mon-Fri)

8

Rotary tuning

1. Press the On/Off button to switch on your radio.

2. Select the required waveband by repeatedly pressing the Band
button. For the FM waveband fully extend the Telescopic aerial
angle and rotate, if necessary, to obtain best reception.

3. Rotate the Tuning control to change the frequency in the following
increments:-

FM 50kHz

MW 1kHz

LW 1kHz

4. When a station is correctly tuned, the tuning indicator will
appear in the display.

5. When the waveband end is reached the radio will bleep and continue
tuning from the opposite waveband end.

6. Set the Volume control and Tone controls to the desired settings.

7. To switch off your radio press the On/Off button.

9

Presetting stations

There are 5 memory presets for each of the 3 wavebands.

1. Press the On/Off button to turn on the radio.

2. Tune to the required station using one of the methods previously
described.

3. Press and hold down the required Preset button until the radio
beeps (greater than 2 seconds) The preset number will appear in
the display and the station will be stored under the chosen preset
button.

4. Repeat this procedure for the remaining presets.

5. Stations stored in preset memories may be overwritten by following
the above procedure.

If you need any further advice, please call our Technical Helpline on :-

020 8758 0338 (Mon-Fri)

10

Recalling a preset station

1. Press the On/Off button to turn on the radio.

2. Select the required waveband by repeatedly pressing the Band
button.

3. Momentarily press the required Preset button, the preset number
and station frequency will appear in the display.

11

Wake to buzzer alarm

A bleep tone will sound when using the buzzer alarm. The alarm bleep
will increase in volume every 15 seconds for one minute followed by one
minutes silence before repeating the cycle. The buzzer alarm will sound
for one hour unless turned off by pressing the On/Off button. Pressing
the On/Off button whilst the alarm is sounding will cancel the alarm for
24 hours.

1. Ensure that the radio switched off.

2. Press and hold down the button until the hour digits and alarm

symbol flash in the display.

3. Press the Tuning up/down buttons to set the required hour. The
clock uses the 24 hour system e.g. 2:00pm is shown as 14:00

4. Press the button, the minutes digits and alarm symbol will flash

in the display.

5. Press the Tuning up/down buttons to set the required minute.

6. Press the button to complete alarm setting.

7. To permanently cancel the alarm press the button until the

symbol is removed from the display.

If you need any further advice, please call our Technical Helpline on :-

020 8758 0338 (Mon-Fri)

12

Wake to radio alarm

When the radio alarm is selected the radio will turn on and play the last
station listened to. The radio alarm will sound for one hour unless turned
off by pressing the On/Off button. Pressing the On/Off button whilst
the alarm is sounding will cancel the alarm for 24 hours. The radio alarm
can be set to sound for 1, 2, 3 or 4 hours . Pressing the On/Off button
whilst the alarm is sounding will cancel the alarm for 24 hours.

1. Ensure that the radio switched off.

2. Press and hold down the button until the hour

digits and alarm symbol flash in the display.

3. Press the Tuning up/down buttons to set the required hour. The
clock uses the 24 hour system e.g. 2:00pm is shown as 14:00

4. Press the button, the minutes digits and alarm

symbol will flash in the display.

5. Press the Tuning up/down buttons to set the required minute.

6. Press the button, the radio alarm duration will

flash in the display.

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7. Press the Tuning up/down buttons to set the required radio alarm
duration. (1, 2, 3 or 4 hours)

8. Press the button to complete alarm setting.

9. To permanently cancel the alarm press the button

until the symbol is removed from the display.

Snooze function(buzzer alarm only)

1. Whilst an alarm is sounding pressing any button (except the On/Off
or Light button ) will activate the snooze function. The Radio or
buzzer alarms will be silenced for 5 minutes.

2. The Display will flash both the snooze symbol and the alarm

symbol . The snooze function can be repeated during

the period that the alarms are active.

If you need any further advice, please call our Technical Helpline on :-

020 8758 0338 (Mon-Fri)

14

Sleep timer

The sleep timer will automatically switch off the radio after a preset time
has elapsed.

1. Press and continue to hold down the button the display will
cycle through the available sleep times in the order 90-60-30-15-90.

Release the button when the required sleep time appears in the

display. The symbol will appear in the display and the radio
will play the last station selected.

2. To cancel the sleep function, press the On/Off button, the
symbol will disappear and the display will revert to showing real time.

Display backlight

1. When the radio is powered via the mains the display backlight can
be switched on and off by pressing the Light button.

When your radio is powered by batteries pressing the Light button
or any other button will switch on the display backlight and illuminate
the display for approximately 15 seconds. The display backlight may
be turned off immediately by pressing the Light button.

15

Headphone socket

A 3.5mm Headphone Socket located on the right-hand end of you radio
is provided for use with either headphones or an earpiece. Inserting a
plug automatically mutes the internal loudspeaker.

FM Stereo/Mono button

1. If a station being received is weak some hiss may be audible. To
reduce the hiss press and hold down the FM St./Mono button to
switch to mono mode. The stereo indicator will be removed from the
display.

2. Press and hold down the FM St./Mono button to return to FM
stereo operation.

Note: FM stereo is only available when using earphone/headphones

If you need any further advice, please call our Technical Helpline on :-

020 8758 0338 (Mon-Fri)

16

Tuning step size

In Europe and other parts of the world MW tuning steps are 9kHz, in
America the MW tuning step size is 10kHz.

On FM most countries use 100kHz tuning steps, your radio can however
be set so as to allow an FM tuning step size of 50kHz.

1. Ensure that your radio is switched off. Press and hold down (7sec)
the Step button until the FM step size begins to flash in the display
and then release.

2. Adjust the FM step size using the Tuning up or Tuning down
buttons.

3. Press the Step button, the MW tuning step size will flash in the
display.

4. Adjust the MW step size using the Tuning up or Tuning down
buttons.

5. Press the Step button to complete the step size setting.

17

Summer time

Your radio can be set to advance the clock to summer time by pressing
a single button.

1. Ensure that your radio is switched off. Press and hold down the
Summer time button until the summer time indicator appears in the
display.

2. To cancel summer time display press and hold down the Summer
time button until the summer time indicator is removed from the
display.

If you need any further advice, please call our Technical Helpline on :-

020 8758 0338 (Mon-Fri)

18

Reset button

If your radio fails to operate correctly, or some digits on the display are
missing or incomplete carry out the following procedure.

1. With the aid of a suitable implement (the end of a paper clip) press
the reset button located on the underside of your radio for at least
5 seconds, this will reset the microprocessor, clock time and clear
all stations stored in preset memory.

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.

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 FM band be used wherever possible as better results in terms of
quality and freedom from interference will usually be obtained than on
the MW or LW bands.

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Specifications

Power Requirements

Mains AC 230 volts, 50Hz only

Batteries 4 x LR20 (D size)

Circuit Features

Loudspeaker Woofer 125mm 4ohms

Tweeter 38mm 4 ohms

Battery Life

Frequency Coverage

Approx. 70 hours of listening for 4 hours a day
at normal volume using alkaline cells.

FM 87.5-108MHz

MW 522- 1629kHz

LW 153- 279kHz

Output Power Mains 1.4 Watts

Batteries 0.8 Watts

Headphone socket 3.5mm dia

Aerial System FM Telescopic aerial

MW Built-in Ferrite aerial

LW Built-in Ferrite aerial

If you need any further advice, please call our Technical Helpline on :-

020 8758 0338 (Mon-Fri)

20

Mains supply

The R9943 will operate from a supply of AC 230 volts, 50Hz only.

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.

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 or coloured
Green or Green-and-yellow.

The wires in the mains lead are coloured in accordance with the
following codes :-

BLUE - NEUTRAL BROWN - LIVE

The wire coloured BLUE must be connected to the terminal marked N or
coloured BLACK.

The wire coloured BROWN must be connected to the terminal marked
L or coloured RED.

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.

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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.

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.

These statements do not affect the statutory rights of a consumer.

If you need any further advice, please call our Technical Helpline on :-

020 8758 0338 (Mon-Fri)

22

Issue 1

ROBERTS RADIO TECHNICAL SERVICES

97-99 Worton Road

Isleworth Middlesex

TW7 6EG

Technical Helpline :- 020 8758 0338 (Mon-Fri during office hours)

20