Sony XR-4740RDS User manual

FM/MW/LW CASSETTE CAR STEREO

Model Name Using Similar Mechanism NEW

Tape Transport Mechanism Type

MG-25B-136

– Continued on next page –

XR-4740RDS/C430RDS/C440RDS

AEP Model

UK Model

SERVICE MANUAL

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

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),

70 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 4 dB

MW/LW

Tuning range MW: 531 – 1,602 kHz

LW: 153 – 281 kHz

Antenna terminal External antenna connector

Intermediate frequency 10.71 MHz/450 kHz

Sensitivity MW: 30 µV

LM: 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

Outputs

(XR-C430RDS/C440RDS):

Power amplifier control lead

Rear line out (1)

Tone controls Bass ±8 dB at 100 Hz

Treble ±8 dB at 10 kHz

Power requirements 12 V DC car battery (negative ground)

Dimensions Approx. 188 ×58 ×181 mm (w/h/d)

Mounting dimensions Approx. 182 ×53 ×164 mm (w/h/d)

Mass Approx. 1.2 kg

Supplied accessories Parts for installation and connections (1 set)

Front panel case (1)

XR-C440RDS: Rotary commander RM-X2S

Design and specifications are subject to change without notice.

Photo: XR-C430RDS

For RM-X2S (Remote Commander),

please refer to RM-X2S/X3S Service

Manual (9-960-039-∏) previously issued.

(XR-C440RDS ONLY)

9-925-541-12 Sony Corporation

2001F0500-1 e Vehicle Company

C2001.6 ShinagawaTec Service Manual Production Group

Ver 1.1 2001.06

– 2 –

TABLE OF CONTENTS

1. GENERAL

Location of Controls .......................................................... 3

Setting the Clock ............................................................... 3

Using the rotary remote ..................................................... 3

Adjusting the sound characteristics ................................... 4

Muting the sound ............................................................... 4

Changing the sound and beep tone .................................... 4

Installation ......................................................................... 5

Connections ....................................................................... 6

2. DISASSEMBLY............................................................ 9

3. ASSEMBLY OF MECHANISM DECK ............. 11

4. MECHANICAL ADJUSTMENTS ......................... 14

5. ELECTRICAL ADJUSTMENTS

Tape Deck Section ............................................................. 14

Tuner Section ..................................................................... 15

6. DIAGRAMS

6-1. Printed Wiring Boards – Main Section – ........................... 23

6-2. Schematic Diagram – Main Section – ............................... 25

6-3. Printed Wiring Board – Key Section – .............................. 30

6-4. Schematic Diagram – Key Section – ................................. 32

6-5. IC Pin Description ............................................................. 35

7. EXPLODED VIEWS ................................................... 37

8. ELECTRICAL PARTS LIST .................................... 40

SERVICING NOTES

Flexible Circuit Board Repairing

•Keep the temperature the soldering iron around 270° C during

repairing.

•Do not touch the soldering iron on the same conductor of the

circuit board (within 3 times).

•Be careful not to apply force on the conductor when soldering or

unsoldering.

Notes on chip component replacement

•Never reuse a disconnected chip component.

•Notice that the minus side of a tantalum capacitor may be dam-

aged by heat.

– 3 –

SECTION 1

GENERAL This section is extracted

from instruction manual.

– 4 –

– 5 –

– 6 –

– 7 –

– 8 –

– 9 –

Note: Follow the disassembly procedure in the numerical order given.

FRONT PANEL ASS’Y

SECTION 2

DISASSEMBLY

Push the button

(release).

Remove the front panel ass’y

to the direction of the arrow

COVER ASS’Y

cover ass’y

– 10 –

SUB PANEL, MECHANISM DECK (MG-25B-136) 5

screw

(PTT2.6

mechanism deck

(MG-25B-136)

flexible flat cable

(CN301)

three screws

(PTT2.6

three screws

(PTT2.6

MAIN BOARD, HEAT SINK

sub panel

connector

(CN302)

two ground point

screws

seven screws

(PTT2.6

two screws

(PTT2.6

main board

heat sink

screw

(PTT2.6

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