Sony xr 1853 mk2 service manual

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XR-1853MK2

SERVICE MANUAL

East European Model

Cassette player section

Tape track 4-tuck ZAchanneI stereo

Wow and flutter 0.2 % (WRMS)

Frequency response 50 ~ 5,000 Hz

Signal-to~ noise ratio 50 dB

Tuner section

FM

Tuning range FMI: 65 - 74 MHz
FMZ: 875 - 108 MHz

Antenna terminal External antenna connector

Intermediate frequency 10.7 MHz

Usable sensitivity 12 dBi

Selectivity 65 dB at 400 kHz

Signal-tu-noise ratio 55 dB (stereo), 60 dB
(mono)

Harmonic distortion at ! kHz
1.5 /o (stereo), 1.0 %

(mono)
Separation 25 dB at 1 .kHz
Frequency response 30 - 15,000 Hz
Capture ratio 9 dB
MW/LW
Tuning range MW: 522 - 1,611 kHz
LW:153 - 281 kHz
Antenna terminal External antenna connector
Intermediate frequency 450 kHz
Sensitivity MW: 35 [av
LW: 40 pV

Power amplifier section

Outputs Speaker outputs
(sure seal connectors)

Speaker impedance -t - 8 ohms

Maximum power output 20 W x 4 (at 4 ohms)

Model Name Using Similar Mechanism XR-1853

Tape Transport Mechanism Type MG-368HJ-32
SPECIFICATIONS

General

Output lead Power antenna relay
control lead

Tone controls 12 dB at 10 kHz

Power requirements 12 V DC car battery
(negative ground)

Dimensions Approx. 188 x 58 x 170 mm
(w/h/d) not incl.
projecting parts and
controls

Mounting dimension Approx 182 x 53 x 165 mm
(w/h/d) not incl.

projecting parts and
controls

Mass Approx. 1.5 kg

Supplied accessories Mounting hardware (1 set)

Design and specifications are subject to change without
notice.

FM/MW/LW CASSETTE CAR STEREI]
S O N Y;

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TABLE OF CONTENTS

GENERAL
Button Locations .................................. 3
Listening to Tape Playback
Tuning in a Station
Memorizing Stations.

Maintenance
Connections ....................................... 6
DISASSEMBLY
Cover ............................................ 8
Front Panel Assy ................................ 8
Mechanism Deck Block .......................... 9
Main Board ...................................... 9
MECHANICAL ADJUSTMENTS ................. 10

ELECTRICAL ADJUSTMENTS
Deck Section. . . .
Tuner Section ........

DIAGRAMS
Circuit Boards Location ........................ 15
Printed Wiring Boards .......................... 16
Schematic Diagram-Main Section (1/3)~ ........ 19
Schematic Diagram~Main Section (2/3)w ........ 23
Schematic Diagram-Main Section (3/ 3)- ........ 27

EXPLODED VIEWS
Cover Section .................................. 30

Chassis Section ............................. 31
Front Panel Section ..................... 32
Mechanism Deck Section 1 ...................... 33
Mechanism Deck Section 2 ............ t ......... 34
ELECTRICAL PARTS LIST ...................... 35

NOTES ON CHIP COMPONENT REPLACEMENT

0 Never reuse a disconnected chip component.

0 Notice that the minus side of a tantalum
capacitor may be damaged by heat.