Roberts R757 Technisches Handbuch

ROBERTS

Sound for Generations

BY APPOINTMENT TO

HER MAJESTY THE QUEEN

SUPPLIERS & MANUFACTURERS

OF RADIO AND TELEVISION

ROBERTS RADIO LIMITED

Operating Instructions

3-Band

Portable

Radio

If you need any further advice, please

call our Technical Helpline on

020 8758 0338 (Mon- ri)

Controls (top panel)

1. Headphone socket

2. On/Off and Volume control

3. Tone control button

4. Wa eband buttons

5. Tuning control

6. Telescopic aerial

AC Adaptor

Revival Range

Classic Range

If you need any further advice, please

call our Technical Helpline on

020 8758 0338 (Mon- ri)

General

Do not allow this unit to be exposed to water, steam or sand. Do not lea e the unit

where excessi e heat could cause damage such as in a parked car where the heat

from the sun can build up e en though the outside temperature may not seem too

high. It is recommended that the FM band be used were e er possible as better

results in terms of quality and freedom from interference will usually be obtained

than on the MW or LW bands.

Mains adaptor

Plug the adaptor into a 13A mains outlet. Plug the lead from the adaptor into the

DC socket, located on the rear of Revival models and on the left hand end on

Classic models. The battery will be automatically disconnected.

The mains adaptor should be disconnected from the mains supply when not in

use.

Battery

Revival models. Open the rear door by releasing the catch on the right-hand side

of the case.

Classic models. Remo e the battery co er on the base of the unit by unscrewing

the retaining stud using a suitable coin or screwdri er.

Fit the battery IEC 6F100 (PP9) to the connector.

Revival models. Close the rear door and fasten the catch.

Classic models. Replace the battery co er and refit the stud.

Reduced power, distortion, and a ‘stuttering’ sound are all signs that the battery

may need replacing.

If the radio is not to be used for any extended period of time it is recommended

that the battery is remo ed from the radio.

We would recommend for economy, this radio is used via the Mains

adaptor whenever possible with battery operation for occasional or stand-

by use only.

Radio Operation

Your radio is equipped with three wa ebands to enable you to select the

programme of your choice. The FM band uses an external telescopic aerial

which should be fully extended and rotated for best reception. MW and LW

bands are recei ed by an internal aerial which is directional. To achie e the

best reception, it may be necessary to rotate the radio.

1. Switch on the recei er by rotating the olume control clockwise until a

click is heard.

2. Depress the appropriate wa eband button for FM MW or LW as

required.

3. Tune to the desired programme by adjusting TUNING control. On

MW and LW the tuning scale is marked in kilohertz (kHz) and on FM

in megahertz (MHz).

4. Adjust the olume and tone controls to the desired tone and sound

le el. Depressing the TONE control button reduces high frequencies

(treble).

Headphones

A 3.5mm socket is pro ided for use with either headphones or an earpiece.

Inserting a plug automatically mutes the internal loudspeaker.

If you need any further advice, please

call our Technical Helpline on

020 8758 0338 (Mon- ri)

Care

For external cleaning use only a soft clean cloth. Use a damp cloth to clean the

cabinet. A mild soap will help remo e grease or oil. Ne er use strong detergents,

spray cleaners, abrasi e powders, thinners or sol ents as these may cause

damage to the radio.

Specifications

Power Requirements 9.0V DC

Battery 1 x IEC 6F100 (PP9)

Battery Life Approx. 80hrs of listening for 4 hours a day at

normal olume.

Circuit Features

Semiconductors 3 Integrated circuits, 1 Voltage regulator.

Output Power 1watt RMS into 8ohms

Headphone socket 3.5mm dia

requency Coverage

FM 87.5 -108MHz

MW 522 - 1620kHz

LW 150 - 281kHz

The Company reserves the right to amend the specification without notice.

Guarantee

This instrument is guaranteed for twel e months from the date of deli ery 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 co er:

1. Damage resulting from incorrect use.

2. Consequential damage.

3. Recei ers with remo ed 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 ser ice department for attention. In the e ent that it is not

possible to return the instrument to the Roberts dealer from whom it was purchased, please contact Roberts Radio

Technical Ser ices Department at the address shown on the back page of this manual before taking further action.

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

ROBERTS RADIO TECHNICAL SERVICES DEPARTMENT

97-99 Worton Road

Isleworth Middlesex

TW7 6EG

Technical Helpline:-020 75 033

Issue 2

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