Sony xr c 503

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XR-C503 w

SERVICE MANUAL East European Model

Model Name Using Similar Mechanism XR-CSOORDS
Tape Transport Mechanism Type MG-52B-135

SPECIFICATIONS

Cassette player section MW/LW
Tape track 4-track Z-channel stereo Tuning range MW: 531 - 1,602 kHz
Wow and flutter 0.05 /- (W RMS) . , LW? 1-53 2? kHz
Frequency response 30 _ 201m Hz Aerial terminal External aerial connector
Signal-to-noise ratio Intermediate frequency 10.71 MHz/450 kHz
..__-.~------- Sensitivity MW: 30 pV
M ML D°lb NR it LW150pV
TYPE II. IV 67 dB 61 dB
TYPE I 64 dB 58 dB Power amplifier section
. Outputs Speaker outputs
Tuner section (sure seal connectors)
FM Speaker impedance _ 4 - 8 ohms
Tuning range 65.0 _ 74.0 MHz Maximum power output 35 W x 4 (at 4 ohms)
3 3° $853:
87.5 - l .
(at so kHz step) General
Aerial terminal External aerial connector OH'PUB Line outputs (2)
Intermediate frequency 10.7 MHz Power aerial relay control
Usable sensitivity 9 dBf lead
Selectivity 75 dB at 400 kHz Power amplifier control
Signal-tortoise ratio 65 dB (stereo), lead
68 dB (mono) Tone controls Bass :8 dB at 100 Hz
Harmonic distortion at 1 kHz Treble :6 dB at 10 kHz
05 % (stereo), Power requirements 12 V DC car battery
0.3 % (mono) , (negative ground)
Separation 35 dB at 1 kHz Dimensions Approx. 188 X 50 x177 mm
Frequency response (w/h/d)
30 -15,000 Hz Maunting dimension Approx 182 x 53 x162 mm
Capture ratio 2 dB M (XVIII/Q] 3
a . ass rox. .
370?; Eff-11:: mm, values "WSW, "' 575 Supplied accessories 93?: for insglation and
connections (1 set)
Front panel case (1)
Rotary remote RM-XZS

Drsign and specifications are subject to change without
notice

FM/MW/LW CASSETTE CAR STEREll
S 0 NY;

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2-1.
2-21
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3-11
3-2.
3-3.
3-4.
3-51
3-6.
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TABLE OF CONTENTS

GENERAL

Location of controls ..

Getting Started ......

Cassette Player .....

Radio ................

Other Functions ......

CD/ MD Changer 7

Connections ............

DISASSEMBLY
Cover ................... . .11
Front Panel Assy ......... . .11
Sub Panel ................ .12
Heat Sink ................. r .12
Mechanism Deck Block ..... . .13
Main Board ............... . .13

ASSEMBLY OF MECHANISM DECK
Alignment of Rotary Switch .................... 14
Gear (LDGE) . , 14
Chassis (S) Assy ................. . . .15
Lever (Mode) ....................... . . .15
Lever (Pinch Selection) ............. i . i 16
Head Plate Assy ..................... . . .16
Lever (Pinch) Assy ................... .. .17
Housing ........................................ 17

Notes on Chip Component Replacement

- Never reuse a disconnected chip component,

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

_2_

3-9.

3-10.
3-11.
312.

6-1.
6-2.
6-3.
641.
6-5.
6-6.

7-1.
7-2.
7-3.
744.

Arm (Suction) .................................. 18

Lever (LDG-B) .. .18

Gear (LDG-FT). r . , . .19

Guide (C) ...................................... 19
MECHANICAL ADJUSTMENTS .................. 20
ELECTRICAL ADJUSTMENTS

Deck Section ...........
Tuner Section .........

DIAGRAMS
IC Pin Description .....
Block Diagram .......
Printed Wiring Boards~Main Section- .
Schematic Diagram-Main Sectioni
Printed Wiring Board~Panel Section- . . .
Schematic Diagram-Panel Section- ............ 45

EXPLODED VIEWS
Chassis Section .................................. 51
Front Panel Section
Mechanism Deck Section 1 .
Mechanism Deck Section 2 . . .

ELECTRICAL PARTS LIST ...................... 55

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