SONY XR1780 - Service Manual Immediate Download

SERVICE MANUAL

FM/MW/SW CASSETTE CAR STEREO

Saudi Arabia Model

SPECIFICATIONS

XR-1780

Model Name Using Similar Mechanism

XR-1790

Tape Transport Mechanism Type

MG-36SZ9-32

Cassette player section

Tape track

4-track 2-channel stereo

Wow and flutter

0.13 % (WRMS)

Frequency response

30 15,000 Hz

Signal-to- noise ratio

55 dB

Tuner section

Tuning range

87.5 108.0 MHz

Aerialterminal

External aerial connector

Intermediate frequency

10.7 MHz

Usable sensitivity

9 dBf

Selectivity

75 dB at 400 kHz

Signal-to-noise ratio

65 dB (stereo),

68 dB (mono)

Harmonic distortion at 1 kHz

0.7% (stereo),

0.4% (mono)

Separation

35 dB at 1 kHz

Frequency response

30 15,000 Hz

MW/SW

Tuning range

MW Tuning interval:

531 1,602 kHz

SW tuning interval:

SW1:

2,940 7,735 kHz

SW2:

9,500 18,135 kHz (except

for 10,140 11,575 kHz)

Aerialterminal

External aerial connector

Intermediate frequency

10.71 MHz/450 kHz

Sensitivity

30 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

Output lead

Power aerial relay control

lead

Tone controls

Bass ±8 dB at 100 Hz

Treble ±8 dB at 10 kHz

Power requirements

12 V DC car battery

(negative earth)

Dimensions

Approx. 186

× 57 × 176 mm

(w/h/d) not incl.

projecting parts and

controls

Mounting dimension

Approx. 182

× 53 × 163 mm

(w/h/d) not incl.

projecting parts and

controls

Mass

Approx.1.2 kg

Supplied accessories

Parts for installationand

connections (1 set)

Design and specifications are subject to change

without notice.

TABLE OF CONTENTS

GENERAL

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

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

Installation .......................................................................

Connections .....................................................................

DISASSEMBLY ......................................................... 7

MECHANICAL ADJUSTMENTS ....................... 11

ELECTRICAL ADJUSTMENTS

Tape Deck Section .......................................................... 11

Tuner Section .................................................................. 12

DIAGRAMS

5-1. Note for Printed Wiring Boards and

Schematic Diagrams ....................................................... 15

5-2. Printed Wiring Board MAIN Board ........................ 17

5-3. Schematic Diagram MAIN Board (1/2) ................... 18

5-4. Schematic Diagram MAIN Board (2/2) ................... 19

5-5. Printed Wiring Board CONTROL Board ................ 20

5-6. Schematic Diagram CONTROL Board ................... 20

5-7. IC Pin Function Description ........................................... 21

EXPLODED VIEWS ................................................ 23

ELECTRICAL PARTS LIST ............................... 29

Flexible Circuit Board Repairing

· Keep the temperature of the soldering iron around 270 °C dur-

ing 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.

SECTION 1

GENERAL

This section is extracted from

instruction manual.

Location of controls

7 LCL (local seek) button 7

(volume/bass/treble/

balance/fader control) buttons 5, 8

9 SEEK/MANU button 7

0 LOUD (loudness) button 8

qa TUNER/A MEM (radio on

· band select/

automatic memory) button 5, 7, 8

qs OFF button

Refer to the pages listed for furtherdetails.

1 Display window

2 SEL (control mode select) button 5, 8

3 DSPL (display mode change/time set)

button 5

4 Z (eject) button 6

5 During radio reception:

Preset number buttons 8

During tape playback:

ATA

ATA (Automatic Tuner

Activation) button 6

6 m/ M (fast-winding)/DIR (tape

transport direction change) buttons 6

DSPL

ATA

SEEK

MANU

LCL

A MEM

DIR

XR-1780

SEL

TUNER

OFF

LOUD

The clock activates.

6 Press the DSPL button.

Note

The clock cannot be set unless the power is turned

on. Set the clock after you turn on the radio, or

during tape playback.

Setting the clock

The clock has a 12-hour digitalindication.

Example: To set the clock to 10:08

1 Turn the ignition switchof your car on.

2 Press the

TUNER

button,or insert a

cassette to turnthe unit on.

3 Display the time.

(Press the

DSPL

button during unit

operation.)

4 Press the

DSPL

button for more than two

seconds.

Set the hour.

5 Press the SEL button.

Set the minute.

(to go

backward)

(to go forward)

The hour digits blinks.

The minute digits blink.

(to go

backward)

(to go forward)

Installation

Precautions

·Choose the installing location carefully so that the unit will not interfere with the normal driving

functions of the driver.

·Avoid installing the unit where it would be subject to high temperatures, such as from direct sunlight or

hot air from the heater, or where it would be subject to dust, dirt or excessive vibration.

·Use only the supplied mounting hardware for a safe and secure installation.

Mounting angle adjustment

Adjust the mounting angle to less than 20°.

Mounting example

Installing in the dashboard

Bend these claws, if necessary.

Ædô« vb« «« XU

VOd

VU<« Ác

Dashboard

«oe«bF« Wu

Fire wall

od(« eU

Remove the bracket.

Æ"uI« Ye

To support the unit

"UN'« rb

182

53 mm

Mounting the unit in a Japanese car

You may not be able to install this unit in some makes of Japanese cars. In such a case, consult your

nearest Sony dealer.

NISSAN

TOYOTA

to dashboard/center console

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v«

to dashboard/center console

wDu« uuJ« ,ËbMØ«oe«bF« Wu

v«

Bracket

VOd

...bU

max. size

ø 5

× 8 mm

vB«

3 TM µ

Bracket

VOd

...bU

max. size

ø 5

× 8 mm

vB«

3 TM µ

max. size

ø 5

× 8 mm

vB«

3 TM µ

max. size

ø 5

× 8 mm

vB«

3 TM µ

Note

To prevent malfunction, install only with the supplied screws

d«

WOUO

UNOM

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Æ...bz«eÃ« «"«e²¼ô« Ë« OEUÝËô« Ë« --U³GKÃ ÷dF²ð

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Caution

·This unit is designed for negative earth 12 V DC operation only.

·Be careful not to pinch any wires between a screw and the body of the car or this unit or between any

moving parts such as the seat railing, etc.

·Before making connections, disconnect the earth terminal of the car battery to avoid short circuits.

·Connect the yellow and red power input leads only after all other leads have been connected.

·Be sure to connect the red power input lead to the positive 12 V power terminal which is energized

when the ignition key is in the accessory position.

·Run all earth wires to a common earth point.

·Be sure to insulate any loose unconnected wires with electrical tape for safety.

Connections

Connection diagram

XR-1780

Front speakers

WOUô«

UUL«

Rear speakers

WOHK)«

UUL«

UNOM

ÆjI

VÃUÝ i¹--Q²Ð XÃu

± dýU³Ä --UOð vKZ qOGA²KÃ WLLBÄ ...bSuÃ« Ác¼

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--UO²Ã« qsoe ,,öÝ« qOu²Ð rIð ô

dHô«

dLô«

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l{uÃ« w

,,d;« qOGAð ÕU²HÄ ÊuJ¹ UÄbMZ --UO²Ã« tO

Íd¹ ÍcÃ« Vlu*« XÃu

± --UO²Ã« ·dDÐ dLSô« --UO²Ã« qsoe pKÝ qOuð sÄ bÂQð

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i--Q

WDI

v« i--Q« ,,ö« lOL

bbL

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qOu«

qOu« jD

Dismounting the unit

"UN'« pOJH

1 Insertthesuppliedtool

8 between the unit and the frame, and rotate 90º to release the

hidden mounting spring. Repeat on the opposite side and remove the frame.

WId*« ...«oe_« UsoeSÐ rÁ

V½U'« vKZ --«dJ²ÃUÐ rÁ ÆwH<« VOÂd²Ã« wzd³Ã« d¹d×²Ã Wl--oe Ád¹Ëb²Ð rÁË ¨--UÞù«Ë "UN'« 5Ð

Æ--UÞù« Ye½«Ë fÂUF*«

10mm

3 ±

90¡

W--oe

2 Insertaflatheadscrewdriverbetweenthebracketandmountingspring.Gentlyprythe

spring toward the unit while pulling the unit out a little. Repeat on the opposite side and

remove the unit.

ÆÃ--UKÃ V×Ý ¡UML pÃË nDKÐ "UN'« ÁU&UÐ wzd³Ã« ldÐ rÁ ÆVOÂd²Ã« wzdÐË "uIÃ« 5Ð "dÃ« `DÄ wz«dÐ pHÄ UsoeSÐ rÁ

Æ"UN'« Ye½«Ë fÂUF*« V½U'« vKZ --«dJ²Ð rÁ

4mm

3¥

Caution

Cautionary notice for handling the bracket

Handle the bracket carefully to avoid injuring your fingers.

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VOÂd²Ã« ...bZUÁ ËUMð uS W¹d¹c% WESöÄ

ÆpFÐU« Õdl ÍoeUH²Ã 'd×Ð VOÂd²Ã« ...bZUÁ ËUMð

Note

The tool

8 is used for removing the unit.

Be sure to keep it for future use.

WEö

...«oe_« Âb²ð

Æ"UN'« YeMÃ

ö³I²Ä UNÄ«b²Ýù UNÐ ÿUH²Sù« sÄ bÂQð