Sony XR-1750 Bedienungsanleitung

XR-1750

US Model

E Model

Australian Model

SERVICE MANUAL

FM/AM CASSETTE CAR STEREO

SPECIFICATIONS

Model Name Using Similar Mechanism NEW

Tape Transport Mechanism Type

MG-52A-135

AUDIO POWER SPECIFICATIONS (US model)

POWER OUTPUT AND TOTAL HARMONIC DISTORTION

13 watts per channel minimum continuous average power into 4 ohms, 4 channels driven from

20 Hz to 20 kHz with no more then 1% total harmonic distortion.

Cassette player section

Tape track 4-track 2-channel stereo

Wow and flutter 0.08% (WRMS)

Frequency response 30 – 20,000 Hz

Signal-to-noise ratio 58 dB

Tuner section

Tuning range US model:

87.5 – 107.9 MHz

E, Australian model:

50 kHz/200 kHz switchable

87.5 – 108.0 MHz (at 50 kHz step)

87.5 – 107.9 MHz (at 200 kHz step)

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

Tuning range US model:

530 – 1,710 kHz

E, Australian model:

9 kHz/10 kHz switchable

531 – 1,602 kHz (at 9 kHz step)

530 – 1,710 kHz (at 10 kHz step)

Antenna terminal External antenna 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

Outputs Power antenna control lead

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 ×182 mm

(71/2 ×23/8 ×71/4in.) (w/h/d)

Mounting dimensions Approx. 182 ×53 ×161 mm

(71/4 ×21/8 ×63/8in.) (w/h/d)

Mass Approx. 1.2 kg (2 lb. 10 oz.)

Supplied accessories Parts for installation and connections (1 set)

Design and specifications are subject to change without notice.

Ver 1.1 2001.04

9-925-564-12 Sony Corporation

2001D0500-1 e Vehicle Company

C2001.4 ShinagawaTec Service Manual Production Group

– 2 –

TABLE OF CONTENTS

1. GENERAL

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

Installation (US Model) ................................................... 4

Installation (E, Australian Model) ................................... 5

Connection....................................................................... 6

2. DISASSEMBLY.......................................................... 8

3. ASSEMBLY OF MECHANISM DECK ........... 10

4. MECHANICAL ADJUSTMENTS ....................... 16

5. ELECTRICAL ADJUSTMENTS

Tape Deck Section ........................................................... 16

Tuner Section................................................................... 16

6. DIAGRAMS

6-1. IC Pin Function Description ............................................ 18

6-2. Printed Wiring Boards –MAIN Section– ........................ 20

6-3. Schematic Diagram –MAIN Section–............................ 23

6-4. Printed Wiring Board –CONTROL Section– ................. 27

6-5. Schematic Diagram –CONTROL Section–.................... 29

7. EXPLODED VIEWS ................................................ 33

8. ELECTRICAL PARTS LIST................................ 37

SERVICING NOTES

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.

–3 –

SECTION 1

GENERAL This section is extracted

from instruction manual.

–4 –

–5 –

–6 –

–7 –

– 8 –

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

COVER

SECTION 2

DISASSEMBLY

FRONT PANEL ASS’Y

Remove the cover

to direction of the arrow

two claws

front panel ass’y

–9 –

MECHANISM DECK

MAIN BOARD, HEAT SINK

mechanism deck

two screws

(PTT2.6

flexible flat cable

(CN1)

seven screws

(PTT2.6

10)

heat sink

two ground point

screws

main board

insulator

connector

(CN351)

three screws

(PTT2.6

front chassis

three screws

(PTT2.6

10)

–10 –

SECTION 3

ASSEMBLY OF MECHANISM DECK

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

ALIGNMENT OF FRONT SWITCH

Align

mark on the rotary switch

the position shown in the figure.

chassis (S) ass’y

Align hole in the gear (LDG-D) with the

position shown in the figure.

hole

Install the gear (LDG-E).

Align hole as shown in the figure.

GEAR (LDGE)

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