Sony xr 7142 service manual

Page 1

_ XR-IIBII/IMII/IMZ/IBUU

SERVICE MANUAL us Model

XR-7130/ 7600

ragtime)!)f/X/Il/f/l/lffl/ can a di an M Ode]
, L L L L XR-7740/7600

AEP Model

XR-7740

E Model

XR77740

Germany Model

XR-7142

f I"

XI? If!

Photo: XR-7140

Model Name Using Similar Mechanism XR-7170

Tape Transport Mechanism Type MG-550-31
SPECIFICATIONS
Power amplifier section (XR-7140) AM
Outputs Speaker outputs Tuning range European and other
(sure seal connectors) countries
Speaker impedance 3.2-8 ohms 53l 4502 kHz
Maximum power output (at 9 kHz step)
20 WX4 (at 4 ohms) Central and South American
'Measured at 14.4 V countries
530-1520 kHz
Cassette player section (at to kH_z step)
Tape track A-track 2-cnannel stereo AM tuning interval
F 0- ,5 9 kHz/1t) kHz swrtchable
requency response 3 .000 Hz Antenna terminal External antenna connector
~ _ _ - - Intermediate Irequency
Signal lo noise ram: 450 kHz
$25638 Dolby a Dolby c Dolby olt Sens'l'VW 35W
TYPE II. IV 66 dB 76 dB 53 dB r
- Continued on next page -
TYPE I 63 dB 73 dB 55 dB
Wow and flutter 0.1% (WHMS)
r Dolby noise reduction manufactured under license from
Tuner section Dolby Laboratories Licensing Corporation.
:M. 875 1050 MH "DOLBY" and the double-D symbol DD are trademarks of
umng range . - . z . . , .
Antenna terminal External antenna connector Dolby Laboratones Licensrng Corporation.
intermediate lrequency
10.7 MHz
Usable sensntivity 12 (18105 ohms)
Selectivity 75 dB at 400 kHz

Signal-to-noise ratio 65 dB (stereo). 70 dB (mono)
Harmonic distortion at 1 kHz
0.5% (stereox 0.3% (mono)

Separation 35 dB at 1 kHz
Frequency response 30~15,000 Hz
Capture ratio 2 dB

FM/AM CASSETTE CAR STEREfl
S ONY;

Page 2

XR-71 30/7140/71 42/7600

General

Output lead Power antenna relay control
lead
Power amplifier control lead
Bass :10 dB at 100 Hz
Treble :10 dB at 10 kHz
+10 dB at 100 Hz
+ 6 dB at 10 kHz
12 V DC car battery
(negative ground)
Dimensions (without bracket)
Approx. 178 x 50 x 160 mm
(w/hld).
not incl. projecting parts and
controls

Tone controls
Loudness

Power requirements

Mounting dimensions

Approx. 182 x 53 x145 mm
(w/hld),

not incl. projecting parts and

contnrols

Weight Approx. 1.9 kg

Accessories supplied

Mounting hardware (1 set)

XR-7500:
Remote controller (1)
Aize AA (R6) battery (2)

Design and specifications subject to change without
notice.

TAB LE OF CONTENTS

Section Title Page
Specifications ----------- 1
Note for Lithium battery ......................... 2
1 . GENERAL
Location and Function of Controls ----------- 3
Installation .............................. 4
Connections ............................. 6
Cassette Deck Operation ~~~~~~~~~~~~~~~~~~ 11
Radio ReceptiOn .......................... 12
Maintenance ............................. 1 3
2. DISASSEMBLY ......................... 14
3. ADJUSTMENTS
3- 1 . Mechanical Adjustment ~~~~~~~~~~~~~~~~~~~~ 16
3-2. Electrical Adjustments
Deck semen ............................ 16
Tuner Section ............................ 18
4. DIAGRAMS
4-1. IC301 ( ,u PD75516G) Functional
Description .............................. 22
42. Schematic Diagram ----------------------- 25
4~3. Printed Wiring Boards ..................... 33
5. EXPLODED VIEWS ....................
6. ELECTRICAL PARTS LIST ------------ 45

Note for Lithium Battery

CAUTION
Danger of explosion if battery is incorrectly replaced.
Replace only with the same or equivalent type recom-
mended by the equipment manufacturer, Discard used
batteries according to manufacturers instructions

ADVARSEL l
Lithiumbatteri-Eksplosionsfare ved fejlagtig hindtering.
Udskiftning m5 kun ske med batteri
af samme fabrikat og type.

Lever def brugte batteri tilbage til leveranduren,

ADVARSEL
Lithiumbatteri-Eksplosjonsfare.
Ved utskifting benyttes kun batteri som
anbefalt av apparatfabrikanten.
Brukt batteri retumeres apparatleverandarcn.

VARNING
Explosionsfara vid felaktigt batteribyte. Anvand samma
batterityp eller en ekvivalent typ som rekommenderas av
apparattillverkaren. Kassera anvant batteri enligt fabri-
kantens instruktion.

VAROITUS
Paristo voi riijzitéia, jos se on virheellisesti asennettu Vaihda
paristo ainoastaan laitevalmistajan suosittelemaan tyyppiin.
Havita kiytetty paristo valmistajan ohjeiden mukaisesti.