Sony xr 7052 service manual

Page 1

SERVIE MANAL

REVISED

SPECIFICATIONS

Power ampllller section
Outputs Speaker outputs
(sure seal connectors)
Preamp outputs (phono lacks)
Speaker impedance
3.2 -6 ohms
Maximum power output
25W + 25W(al 4 ohms)
(4 channels driven)
'Maasured at 14.4 v

Cassette player section

Tape Prerecorded tape cassette
Head Playback head
Tape track 4-lrack 2vchannel stereo

Frequency response
40 - 16,000 Hz
Signal-to-noise ratio
With type I cassette
55 dB (A-welghted) (Dolby B NH 011)
Dolby B NFl etlect 3 dB
Wow and lluller 0.15% (WFlMS)

Tuner section

System Superheterodyne tuner Computerized
quartz-locked synthesizer system

Antenna terminal FMIAM external
antenna connector
FMIAM power antenna
relay control lead

FM tuner section

Frequency range

Frequency range 87.5-108Mbtz
Tuning interval 50 kHz

9-953-403-13

Including 9-953-403-1 2
9-953-403-81

Model Name Using Similar Mechanism XR-7050

Tape Transport Mechanism MG-48-83

Intermediate trequency

10.7 MHz
Usable sensitivity 12.5 (181475 ohms)
Sensitivity at 50 dB quietlng

17.5 dBl (75 ohms)
Selectivity 70 dB at 400 kHz
Slgnal-to-nolse ratio

65 dB (stereo). 68 d8 (monaural)
Harmonlc distortion at 1 kHz

0.9% (stereo). 0.5% (monaural)
Separation 35 dB at 1 kHz
Frequency response

30 - 15,000 Hz
Capture ratio 2.0 dB
AM tuner section
Frequency range
Frequency range 531 -1,602 kHz
Tuning Interval 9 kHz

lntennedlale lrequency
459 kHz
Senaltlvlly 34 v

- Continued on page 2 -

Dolby noise reduction manufactured under license from
Dolby Laboratories Licensing Corporation.
"DOLBY" and the double-D symbol D0 are trademarks of
Dolby Laboratories Licensing Corporation.

FM/AM CASSETTE CAR STEREO

SONY;

Page 2

XR-7052

General
Output lead
Power requirements
12 V DC car battery (negative ground)
Approx. 178 x 50 x 160 mm

(w/hld)

(71. x 2 x 6% Inches)
not inci. projecting pans and controls
Mounting dimensions
Approx. 182 x 53 x145 mm

(w/hld) '

(7/. x 213 x 53/. Inches)
not incl. protecting parts and controls
Approx. 1.3 kg (2 lb 14 02)

Power antenna relay control lead

Dimensions

Weight

Accessories supplied
Mounting hardware (1 set)
Fuses (1 set)

TABLE OF CONTENTS
Features
Tuner section m M £82
~Memory preset tuning iunclion allows Specifications. ,,,,,, , , , . ,
you to store 6 stations for each band in Features 2
memory. ..... . . . ...........................
-Preclse tuning is possible with the SECTION 1. GENERAL
"9 synthesizer system. 1-1. Location and Function of Controls .......... 2
Cassette deck section 1-2. Connections ......................... 3
gggzrzgrzzsigggggggggy to W" SECTION 2. MICROCOMPUTER SPECIFICATION
'Aulomatlc Music Sensor (AMS) to locate 01PD1708AG~023~00) """""""" 5
:9 iegrfllng 0* a selection during SECTION 3. MECHANICAL ADJUSTMENT .......... 6
p ay ac .
~The Dolby B NR system reduces tape SECTlON 4. ELECTRICAL ADJUSTMENT .......... 6
hiss noise during playback.
~METAL button for high-performance SECTION 5' D'AGRAMS
metal tapes. 5-l. Semiconductors Lead Layout ............ 12
5-2. Printed Wiring Boards. . ...... 14
5-3. Schematic Diagram ................... 17
54. IC Block Diagram .................... 21
SECTION B. EXPLODED VIEWS ................ 23
SECTION 7. ELECTRICAL PARTS LIST ........... 28
SECTION 1
GEN ERAL

1-1. LOCATION AND FUNCTION OF CONTROLS

M. SCAN (memory scany
A. MEM (automatic memory) button

a (eject) button

Display window---fi

General

oDirect lunction system allows you to
switch the function between radio
reception and tape playback directly.

~You can control the balance of the front
speakers and the rear speakers in a
4-speaker system with an additional
amplifier as well as with the built-in
amplifier (Multl-tader system).

-Trailic inlonnallon broadcast can be
received.

0Automalic loudness circuit to reinlorce
the bass and treble automatically when
listening at a low volume.

0Mnxlmum power output at 25W 7+ 25W.

xcasseue insertion door

DIFI (tape transport dlmtiony»l«
(Vast winfllng) buttons

SDK button

l IONO (monauval) button

FADEFI SELECT switch ->] 1% fi 5

MAN (manual) 4/- buttons

FADERcontroi "7 e (I) (

VOL (volume) control [PUSH POWER -J

swltch [PULL EAL (balance) control

METAL button

% SEEK we buttons
Preset number buttons

-fiBAND button

BASS cont-

UD(D0lby noise teduclion) button

AMS (Automatic Music Sensoll
button

TREBLE cont ml