Sony xr 7172 service manual

Page 1

XR-llllll 7171/ 7172

SERVICE MANUAL

AEP Model

XR-7770/7177

E Model

XR-7770

Germany Model

XR»7172

Photo: XR-717o

Power amplifier section

Outputs Speaker outputs
(sure seal connectors)
Speaker impedance 3.2 - 8 ohms
Maximum power output
20 WX4 (at 4 ohms)
Measured at 144 V

Cassette player section
Tape track 4-lrack Echannel stereo
Frequency response 30~ 31000 Hz

Signal-lo~norse ratio

Cassette
IYPB Dolby B Dolby C Dolby ofl
TYPE II, N 66 dB 76 dB 58 dB
TYPE I 63 dB 73 dB 55 (13
Wow and flutter 0.1% (WRMS)
Tuner section
FM
Tuning range 875-1080 MHz
Antenna terminal External antenna connector
Intermediate frequency
10.7 MHz
Usable sensitivity 12 mi" (75 ohms)
Selectivity 75 dB at 400 kHz

Signal~to~noise ratio 65 dB (stereo). 70 dB (mono)
Harmonic distortion at 1 kHz
05% (stereo), 0.3% (mono)

Separation 35 dB at 1 kHz
Frequency response 30- 15.000 Hz
Capture ratio 2 dB

Model Name Using Similar Mechanism NEW

Tape Transport Mechanism Type MG-55L2-31
SPECIFICATIONS
AM (XR-7170/7172)
Tuning range European and other
countries
531 -1,602 kHz
(at 9 kHz step)

Central and South American
countries (XR-7l 7o)
BSD-1,620 kHz
(at 10 kHz step)
AM tuning interval
9 kHz/10 kHz switchable

Antenna terminal External antenna connector
intermediate frequency

450 kHz
Sensitivity 35nV

- Continued on next page -

Dolby noise reduction manufactured under license from
Dolby Laboratories Licensing Corporations
DOLBY" and the doubleD symbol DC] are trademarks of
Dolby Laboratories Licensing Corporation.

FM/AM CASSETTE CAR srrnru
ONY;

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XR-71 70/71 71/71 72

MW/LW (XFI-7171)
Yuning range MW: 531 4,602 kHz

LW: 153-281 kHz
Antenna terminal External antenna connector

Intermediate lrequency

450 kHz
Sensitivity MW: 35W
LW: 70uV
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 (wilhout bracket)
Approx. I78 x 50 x153 mm
(wlh/d).
not incl. projecting parts and
controls

Tone controls
Loudness

Power requirements

Mounting dimensions

Approx. 182 x 53 x145 mm
(wlhld).

not incl. proiecting parts and

contnrols

Weight Approx. 1.9 kg

Accessories supplied

Mounting hardware (I set)

Design and specifications subject to change without
notice.

TABLE OF CONTENTS

Section Title Page
Specifications ~~~~~~~~~~~ A A 1
Note for Lithium battery 2
1. GENERAL
Location and Function of Controls ----------- 3
Installation .. . . . . . ....................... 4
Connections ............. 4 . . . . 6
Cassette Deck Operation . . 8
Radio Reception --------- - - - . ........ . . . . . 9
CD Operation . ........................ . . . 10
Maintenance ............................. 11
2. DISASSEMBLY ......................... 12
3. ADJUSTMENTS
3-1. Mechanical Adjustment ------ . -------- - - - - ~ 14
3-2. Electrical Adjustments
Deck Section
Tuner Section
4. DIAGRAMS
4-1. IC301 ( u PD75516G) Functional
Description . . . . . . . 20
4~2. Schematic Diagram . ~ ~ ~ ~ ~ . 25
4-3. Printed Wiring Boards ...... . ..... . 31
5. EXPLODED VIEWS ------------------ ' 35
6. ELECTRICAL PARTS LIST ---------- . - 38

Note for Lithium Battery

CAUTION

Danger of explosion il battery is incorrectly
replaced. Replace only with the same or
equivalent type recommended by the equipment
manufacturer. Discard used batteries according
to manufacturer's instructions.

ADVARSELI
Lithiumbatteri-Eksvlosionsiare ved leilagtig héndtering.
Udskittning ma kun ske med batteri
at samme fabrikat 03 type.

Lever det bmgte batteri tilbage til leverandcren.

ADVARSEL

Lithiumbatteri - Eksplosionslaret
Ved utskilting benyttes kun batteri som
anbelalt av appamtlabrikanten.
Brukt batteri returneres apparatleverandtren.

VARNING

Explosionslara vid telaktigt batteribyte.
Anvand samma battefityp eller en ekvivalent
typ som rckommenderas av apparaltillverkaren.
Kassera anviint batteri enligt labrikantens
instmklion.

VAROITUS

Paristo voi rtiiahtaa. ios se on virheellisesti asennettu.
Vaihda pan'sto ainoastaan laitevalmistainn suositlelemaan
tyyppiin. Havitfa kaytetty paristo valmistaian ohjeiden
mukaisesti.