Sony XR-4790 User Manual

FM/MW/LW Cassette Car Stereo

3-861-514-11 (1)

Operating Instructions

Manual de instrucciones

Bruksanvisning

Manual de instruções

For installation and connections, see the supplied installation/connections manual.

Con respecto a la instalación y las conexiones, consulte el manual de Instalación/ conexiones suministrado.

Vi hänvisar till det medföljande häftet angående montering/anslutningar.

Para a instalação e as ligações, consulte o manual de instalação/ligações fornecido.

XR-4790

 1998 by Sony Corporation

Welcome!

Thank you for purchasing the Sony Cassette Car Stereo. This unit lets you enjoy a variety of features by using an optional rotary commander.

Table of contents

Getting Started

Resetting the unit ................................................ 4

Detaching the front panel .................................. 4

Setting the clock .................................................. 5

Cassette Player

Listening to a tape ............................................... 5

Radio

Memorising stations automatically

— Best Tuning Memory (BTM) ................... 6

Memorising only the desired stations.............. 7

Receiving the Memorised stations.................... 7

Other Functions

Adjusting the sound characteristics ................. 8

Attenuating the sound ....................................... 8

Changing the sound and beep tone ................. 8

Additional Information

Precautions ........................................................... 9

Maintenance ....................................................... 10

Dismounting the unit ....................................... 10

The rotary commander labels ......................... 11

Location of controls .......................................... 12

Specifications ..................................................... 13

Troubleshooting guide ..................................... 14

Index ................................................................... 15

Getting Started

Resetting the unit

Before operating the unit for the first time or after replacing the car battery, you must reset the unit. Press the reset button with a pointed object, such as a ballpoint pen.

Reset button

Note

Pressing the reset button will erase all the Memorised programme and memory functions.

Detaching the front panel

The front panel of this unit can be detached to prevent the unit from being stolen.

1 Press (OFF).

2 Press (RELEASE) to detach the front

panel then gently pull it out.

(RELEASE)

Attaching the front panel

Attach part A of the front panel to part B of the unit as illustrated and push until it clicks.

Notes

• Make sure the front panel is right side up when attaching

it to the unit as it cannot be attached upside down.

• Do not press the front panel too hard when attaching it

to the unit. It can easily be attached by pressing it lightly against the unit.

• When you carry the front panel with you, keep it in the

supplied front panel case.

• Do not press hard or put excessive pressure on the

display windows of the front panel.

• Do not expose the front panel to direct sunlight, heat

sources such as hot air ducts or leave it in a humid place. Never leave it on the dashboard etc. of a car parked in direct sunlight where there may be a considerable rise in temperature inside the car.

Caution alarm

If you turn the ignition key to the OFF position without removing the front panel, the caution alarm will beep for a few seconds (only when the POWER SELECT switch is set to the A position).

Notes

• Be sure not to drop the panel when detaching it from the unit.

• If you press (RELEASE) to detach the panel while the unit is still turned on, the power will automatically turn off to protect the speakers from being damaged.

Setting the clock

The clock has a 24-hour digital indication.

For example, setting it to 10:08

Cassette Player

1 Press (OFF) or (DSPL) during operation. 2 Press (DSPL) for two seconds.

100

The hour digit flashes.

1 Set the hour digits.

To go backward

1000

2 Press (SEL) momentarily.

1000

The minute digits flashes.

3 Set the minute digits.

To go

backward

1008



To go forward



To go forward



3 Press (DSPL) momentarily.

1008

The clock starts.

Note

If the POWER SELECT switch on the top of the unit is set to the B position, the clock cannot be set unless the power is turned on. Set the clock after you have turned on the radio.



Listening to a tape

Insert a cassette.

Playback will start automatically.

If a cassette is already inserted, press (SOURCE) repeatedly until “TAPE” is displayed.

TAPE

The side facing up is being played.

TAPE

The side facing down is being played.

Tip

To change the tape transport direction, press (MODE) (*) during tape playback.

To Stop playback Eject the cassette

Fast-winding the tape

During playback, press either side of (SEEK/AMS) for two seconds.



Press

(OFF)

SEEK

AMS

Fast-forwardRewind

Getting Started/Cassette Player

To start playback during fast-forwarding or rewinding, press (MODE) (*).

Locating the beginning of a track

— Automatic Music Sensor (AMS)

You can skip up to nine tracks at one time.

During playback, press either side of (SEEK/AMS) momentarily.

SEEK

AMS

To locate the preceding tracks

Note

The AMS function may not work when :

• the blanks between tracks are shorter than 4 seconds

• there is noise between tracks

• there are long sections of low volume or quiet sections.

To locate the succeeding tracks

Changing the displayed items

Each time you press (DSPL) momentarilly during tape playback, the displayed item changes as follows:

z Tape playback z Clock z Frequency*

* While the ATA function is activated.

Switching to the radio while fastwinding a tape

— Automatic Tuner Activation (ATA)

Press (5) during playback.

“ATA” appears on the display.

When fast-forwarding or rewinding with (SEEK/AMS) for two seconds, the tuner will turn on automatically.

Radio

Memorising stations automatically

— Best Tuning Memory (BTM)

This function selects from the currently received band the stations with the strongest signals and Memorises them in order of their frequency.

PREVENTING ACCIDENTS!

When tuning in while driving, use the automatic tuning or memory preset search function instead of manual tuning.

1 Press (SOURCE) repeatedly to select the

tuner.

Each time you press (SOURCE), the source changes as follows:

TAPE ˜ TUNER

2 Press (MODE) repeatedly to select the

band.

Each time you press (MODE), the band changes as follows:

FM1 n FM2 n FM3 n MW n LW

3 Press (BTM) for two seconds.

To cancel this function, press (5) again.

Notes

• The unit will not store stations with weak signals on the preset number buttons. If there are only a few stations received, some preset number buttons will remain empty.

• When a preset number indicated on the display, the unit starts storing station from the one currently display.

Memorising only the desired stations

Up to 6 stations on each band (FM1, FM2, FM3, MW and LW) can be stored on the preset number buttons in the order of your choice. Therefore, 18 FM stations can be Memorised. If you try to store another station on the same preset number button, the most recently stored station will be erased.

1 Press (SOURCE) repeatedly to select the

tuner.

2 Press (MODE) repeatedly to select the

band.

3 Press (SEEK/AMS) to search for the

station you wish to store on a preset number button.

4 Press the desired preset number button

((1) to (6)) for two seconds.

The number of the selected preset number button appears on the display.

Changing the displayed items

Each time you press (DSPL), the display changes between the frequency and the clock.

If you cannot tune in a preset station

Press either side of (SEEK/AMS) momentarily to search for the station (automatic tuning).

Scanning stops when a station is received. Press either side of (SEEK/AMS) repeatedly until the desired station is received.

Note

If the automatic tuning stops too frequently, press (LCL) to light up “LCL” on the display (local seek mode). Only the stations with relatively strong signals are tuned in.

Tip

If you know the frequency, press and hold either side of (SEEK/AMS) until the desired station is received (manual tuning).

Cassette Player/Radio

Receiving the Memorised stations

1 Press (SOURCE) repeatedly to select the

tuner.

2 Press (MODE) repeatedly to select the

band.

3 Press the preset number button

momentarily ((1) to (6)) on which the desired station is stored.

Tip

Press either side of (PRST) to receive in order the stations stored in the memory (Preset Search Function).

Other Functions

Adjusting the bass curve

Turn the D-BASS control to adjust the bass level (1, 2 or 3).

“D-BASS” appears in the display.

To cancel, turn the control to the OFF position.

Adjusting the sound characteristics

1 Select the item you want to adjust by

pressing (SEL) repeatedly.

VOL (volume) n BAS (bass) n TRE (treble) n BAL (left-right) n FAD (front-rear)

2 Adjust the selected item by pressing

either (+) or (–).

Adjust within three seconds after selecting. (After three seconds the button will again serve as the volume control button.)

Attenuating the sound

Press (ATT).

The “ATT” indication flashes.

To restore the previous volume level, press again.

Note

If the bass sound becomes distorted, adjust the D-BASS control or the volume button.

Attenuating the beep tone

Press (6) while pressing (SEL).

To obtain the beep tone again, press these buttons again.

Changing the sound and beep tone

Boosting the bass sound — D-Bass

To enjoy clear and powerful bass sound, you can boost only the low frequency signal with a sharp curve. This is the effect you get when use an optional subwoofer system. For example, you can hear the bass line more clearly even if the vocal volume remains the same. You can emphasize and adjust the bass sound easily with the D-BASS control.

Analog D-BASS

D-BASS 3

Level

0dB

D-BASS 2

D-BASS 1

Frequency (Hz)

Additional Information

Precautions

• If your car was parked in direct sunlight

resulting in a considerable rise in temperature inside the car, allow the unit to cool off before operating it.

• If no power is being supplied to the unit,

check the connections first. If everything is in order, check the fuse.

• If no sound comes from the speakers of a

2-speaker system, set the fader control to the center position.

• When the tape is played back for a long

period, the cassette may become warm because of the built-in power amplifier. However, this is not a sign of malfunction.

If you have any questions or problems concerning your unit that are not covered in this manual, please consult your nearest Sony dealer.

To maintain high quality sound

If you have drink holders near your audio equipment, be careful not to splash juice or other soft drinks onto the car audio. Sugary residues on this unit or cassette tapes may contaminate the playback heads, reduce the sound quality, or prevent sound reproduction altogether. Cassette cleaning kits cannot remove sugar from the tape heads.

Notes on Cassettes

Cassette care

• Do not touch the tape surface of a cassette, as

any dirt or dust will contaminate the heads.

• Keep cassettes away from equipment with

built-in magnets such as speakers and amplifiers, as erasure or distortion on the recorded tape could occur.

• Do not expose cassettes to direct sunlight,

extremely cold temperatures or moisture.

• Slack in the tape may cause the tape to be

caught in the machine. Before you insert the tape, use a pencil or similar object to turn the reel and take up any slack.

Slack

• Distorted cassettes and loose labels can cause

problems when inserting or ejecting tapes. Remove or replace loose labels.

Cassettes longer than 90 minutes

The use of cassettes longer than 90 minutes is not recommended except for long continuous play. The tapes used for these cassettes are very thin and tend to be stretched easily. Frequent playing and stopping of these tapes may cause them to be pulled into the cassette deck mechanism.

Other Functions/Additional Information

Maintenance

Fuse Replacement

When replacing the fuse, be sure to use one matching the amperage rating stated on the original fuse. If the fuse blows, check the power connection and replace the fuse. If the fuse blows again after replacement, there may be an internal malfunction. In such a case, consult your nearest Sony dealer.

Dismounting the unit

Release key (supplied)

Fuse (10 A)

Warning

Never use a fuse with an amperage rating exceeding the one supplied with the unit as

this could damage the unit.

Cleaning the Connectors

The unit may not function properly if the connectors between the unit and the front panel are not clean. In order to prevent this, open the front panel by pressing (RELEASE), then detach it and clean the connectors with a cotton swab dipped in alcohol. Do not apply too much force. Otherwise, the connectors may be damaged.

Main unit

Back of the front panel

The rotary commander labels

You can control this unit with the optional rotary commander (RM-X4S). Some labels are supplied with the rotary commander. Attach that label which matches the functions of the master unit and the mounting position of the rotary commander. When you mount the rotary commander, attach the appropriate label, as in the illustration below.

DSPL

MODE

SEL

MODE

DSPL

Additional Information

Location of controls

SEEK

AMS

SEL

ATT

MODE

OFF

BTM

SOURCE

RELEASE

Refer to the pages for further details.

1 SEL (control mode select) button 5, 8 2 SOURCE button (TAPE/TUNER) 5, 6, 7 3 MODE (*) button

During tuner reception:

BAND select 6, 7

During tape playback:

Transport direction change 5

4 POWER SELECT switch (located on the

top of the unit)

See “POWER SELECT Switch” in the Installation/Connections manual.

5 OFF button 4, 5 6 SEEK/AMS button 5, 6, 7 7 6 (Eject) button 5 8 DSPL (display mode change/time set)

button 5, 6, 7

9 During radio reception:

Preset number buttons 7

During tape playback:

(5) ATA (Automatic Tuner

Activation) button 6

231

LCL

PRST

ATA

564

D-BASS

OFF

DSPL

!º (+)(–) (volume/bass/treble/left-right/

front-rear control) button 5, 8

!¡ RELEASE (front panel release) button

4, 10

!™ Reset button (located on the front side

of the unit hidden by the front panel)

Press this button when you use this unit for the first time, when you have changed the car battery, or when the buttons of this unit do not function properly.

!£ ATT button 8 !¢ BTM (Best tuning memory) button 6 !∞ Display window !§ LCL button 7 !¶ PRST button 7 !• D-BASS control 8

Specifications

Cassette player section

Tape track 4-track 2-channel stereo Wow and flutter 0.08 % (WRMS) Frequency response 30 – 18,000 Hz Signal-to-noise ratio 58 dB

Tuner section

Tuning range 87.5 – 108.0 MHz Antenna terminal External antenna connector Intermediate frequency 10.7 MHz Usable sensitivity 8 dBf Selectivity 75 dB at 400 kHz Signal-to-noise ratio 65 dB (stereo),

68 dB (mono)

Harmonic distortion at 1 kHz

0.5 % (stereo),

0.3 % (mono) Separation 35 dB at 1 kHz Frequency response 30 – 15,000 Hz Capture ratio 2 dB

MW/LW

Tuning range MW: 531 – 1,602 kHz

LW: 153 – 281 kHz Antenna terminal External antenna connector Intermediate frequency 10.71 MHz/450kHz Sensitivity MW: 30 µV

LW: 50 µV

Power amplifier section

Outputs Speaker outputs

(sure seal connectors) Speaker impedance 4 – 8 ohms Maximum power output 35 W × 4 (at 4 ohms)

General

Tone controls Bass ±8 dB at 100 Hz

Power requirements 12 V DC car battery Dimensions Approx. 188 × 58 × 181 Mounting dimensions Approx. 182 × 53 × 164 mm

Mass Approx. 1.2 kg Supplied accessories Parts for installation and

Optional accessories Rotary commander

Design and specifications are subject to change without notice.

Treble ±8 dB at 10 kHz

(negative ground)

mm (w/h/d)

(w/h/d)

connections (1 set) Front panel case (1)

RM-X4S

Additional Information

Troubleshooting guide

The following checklist will assist in the correction of most problems you may encounter with your unit. Before going through the checklist below, refer to the operating procedures.

General

Problem

No sound.

Indications do not appear on the display.

No beep tone.

Tape playback

Problem

Playback sound is distorted.

The AMS does not operate correctly.

Cause/Solution

• Adjust the volume with (+).

• Set the fader control to the center position for 2-speaker

systems.

Remove the front panel and clean the connectors. See “Cleaning the Connectors” in “Maintenance” for details.

The beep tone is attenuated.

Cause/Solution

Contamination of the tape head. n Clean the head.

• There is noise in the space between tracks.

• A blank space is too short (less than four seconds).

• + on (SEEK/AMS) is pressed immediately before the

following track.

• = on (SEEK/AMS) is pressed immediately after the track

starts.

• A long pause, or a passage of low frequencies or very low

sound level is treated as a blank space.

Radio reception

Problem

Preset tuning is not possible.

Automatic tuning is not possible.

If the above-mentioned solutions do not help to improve the situation, consult your nearest Sony dealer.

Cause/Solution

• Store the correct frequency.

• The broadcast is too weak.

The broadcast is too weak. n Use manual tuning.

Index

ATT 8 Automatic Music Sensor (AMS) 6 Automatic tuning 7 Automatic Tuner Activation (ATA) 6

BAL (left-right) 8 BAS (bass) 8 Best Tuning Memory (BTM) 6

Caution alarm 4 Clock 5

D, E

D-BASS (D-Bass) 8 Display 6

F, G, H, I, J, K

FAD (front-rear) 8 Fast-forward 5 Front panel 4 Fuse 10

Local seek mode (LCL) 7

M, N, O

Manual tuning 7

P, Q

Preset search 7

R, S

Radio 6 Reset 4 Rewind 5 Rotary commander 11

Additional Information

T, U, V, W, X, Y, Z

Tape playback 5 TRE (treble) 8

¡Bienvenido!

Enhorabuena por la adquisición del sistema estéreo de cassettes para automóvil de Sony. Esta unidad permite disfrutar de diversas funciones mediante un mando rotativo opcional.

Indice

Procedimientos iniciales

Restauración de la unidad ................................. 4

Extracción del panel frontal............................... 4

Puesta en hora del reloj ...................................... 5

Reproductor de cassettes

Escucha de cintas ................................................ 5

Radio

Memorización automática de emisoras

— Función de memorización de la mejor

sintonía (BTM) ................................................ 6

Memorización de las emisoras deseadas......... 7

Recepción de emisoras memorizadas .............. 7

Otras funciones

Ajuste de las características del sonido............ 8

Atenuación del sonido ....................................... 8

Cambio de los ajustes de sonido y tono del

pitido ............................................................... 8

Información complementaria

Precauciones ........................................................ 9

Mantenimiento .................................................. 10

Desmontaje de la unidad ................................. 10

Etiquetas del mando rotativo .......................... 11

Ubicación de los controles ............................... 12

Especificaciones ................................................. 13

Guía para la solución de problemas ............... 14

Indice alfabético ................................................ 15

Procedimientos iniciales

Restauración de la unidad

Antes de emplear la unidad por primera vez, o bien después de sustituir la batería del automóvil, es necesario restaurar dicha unidad. Presione la tecla de restauración con un objeto puntiagudo, como un bolígrafo.

Tecla de restauración

Nota

Al presionar la tecla de restauración se borrarán todos los programas memorizados y las funciones de memoria.

Extracción del panel frontal

Es posible extraer el panel frontal de la unidad para evitar que lo roben.

1 Presione (OFF). 2 Presione (RELEASE) para extraer el panel

frontal y desmóntelo tirando hacia fuera con suavidad.

(RELEASE)

Inserción del panel frontal

Fije la parte A del panel frontal a la parte B de la unidad tal como muestra la ilustración y ejerza presión hasta oír un chasquido.

Notas

• Cerciórese de colocar correctamente el panel frontal en la

unidad, ya que no podrá fijarse al revés.

• No presione el panel frontal a la fuerza contra la unidad

cuando lo inserte en la misma. El panel podrá insertarse con facilidad presionándolo ligeramente contra la unidad.

• Para llevar consigo el panel frontal, métalo en la caja

para el mismo suministrada.

• No aplique demasiada fuerza sobre el visor del panel

frontal.

• No exponga el panel frontal a la luz solar directa, fuentes

térmicas tales como conductos de aire caliente, ni lo deje en lugares húmedos. No lo deje nunca en el salpicadero, etc. con el automóvil aparcado al sol, porque la temperatura del interior del mismo podría aumentar considerablemente.

Alarma de aviso

Si pone en OFF la llave de encendido sin haber extraído el panel frontal, se activará la alarma de aviso, y durante algunos segundos sonará un pitido (solamente cuando el selector POWER SELECT esté en la posición A).

Notas

• Tenga cuidado de no dejar caer el panel frontal cuando lo extraiga de la unidad.

• Si presiona (RELEASE) para extraer el panel frontal con la alimentación de la unidad conectada, ésta se desconectará automáticamente a fin de evitar que se dañen los altavoces.

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