Sony STR-313L Service Manual

GENERAL
Power Requirements:
Power Consumption:
Dimensions:
Weight:
FM SECTION
Frequency Range:
Antenna:
Intermediate
Frequency:
Sensitivity at
50dB Quieting:
SPECIFICATIONS
240V ac, 50H2(UK model)
120V, 220V or 240V ac adjustable,
50Hz(AEP model}
210W(UK model)
180W(AEP model)
Approx.410(w)x145(h)x310{d)mm
: 16(w)x5 3/4 (h)x12 "/s (d) inches
including projecting parts and
controls
Approx.7.6kg, 16 Ib 13 oz (net)
Approx.8.8kg, 19 Ib 7 oz {in shipping carton)
87.5—108MHz
300 © balanced
75 2 unbalanced
10.7MHz
3.5uV (10.7dB) (MONO)
45uV (33dB) (STEREO)
SAFETY RELATED COMPONENT WARNING?
APONENT
ON THE
OPER ATION
IDENTIFIED BY
SCHEMATIC DIAGRAMS,
S
AND
IN
THE
PARTS
LiST
ARE
CRITICAL
TO
REPLACE THESE COMPONENTS
i SONY PARTS WHOSE PART NUMBERS APPEAR
SHOWN
IN
THIS
MANUAL
OR
IN
SUPPLEMENTS
LISHED BY SONY
SHADING ANG MARK
EXPLODED
Sensitivity
at 46dB Quieting:
AEP Model
UK Model
4uV (12dB) (MONO)
{at 40kHz deviation) 50uV (34dB) (STEREO)
Usable Sensitivity:
{at 40kHz deviation)
S/N Ratio:
Harmonic Distortion:
1M Distortion:
Separation:
Frequency Response:
1.8uV (5dB), HF
1.6uV (4dB), S/N=26d0B
75dB (MONO)
70dB (STEREO)
At 100Hz
0.2% (MONO)
0.3% (STEREO)
At 1kHz
0.2% (MONO}
0.3% (STEREO)
At 10kHz
0.3% (MONO)
0.5% (STEREO)
0.2% (MONO)
0.3% (STEREO)
30dB at 100H%Z
45dB at 1 kHz
35dB at 10kHz
40-12, 500Hz*9:5 dB
30-15, OOOHz *3:3 dB
— Continued on page 2 —
SERVICE MANUAL

Sony STR-313L Specifications

General

Brand	Sony
Model	STR-313L
Category	Receiver
Language	English

Summary

SPECIFICATIONS

GENERAL

General specifications including power, dimensions, and weight.

FM SECTION

Detailed FM reception performance specifications like sensitivity and distortion.

SW/MW/LW SECTION

AUDIO AMPLIFIER SECTION

MODEL IDENTIFICATION

SECTION 1 OUTLINE

BLOCK DIAGRAM

Visual representation of the unit's functional blocks and signal flow.

Integrated Circuits (ICs)

CX168 Main Function

Primary functions of the CX168 IC in FM/AM signal processing.

CX178 Main Function

Primary functions of the CX178 IC in FM stereo and general operations.

Photo Interrupter (IC401, 402)

Explanation of photo interrupter operation for station selection.

CIRCUIT DESCRIPTION

Program Sensor Circuit

Description of the sensor circuit for automatic station selection.

Transistor Circuits (Q202 and 401)

Explanation of transistor roles in muting and indicator circuits.

IC REPLACEMENT

SECTION 2 DISASSEMBLY

TOP COVER REMOVAL

Instructions for removing the top cover of the receiver.

FRONT GLASS REMOVAL

Instructions for removing the front glass panel.

BOTTOM PLATE REMOVAL

Instructions for removing the bottom plate.

FRONT PANEL REMOVAL

Instructions for removing the front panel assembly.

DIAL CORD STRINGING

Preparation

Initial steps and materials needed for dial cord stringing.

Stringing Process

Detailed steps for winding and routing the dial cord.

Dial Pointer Installation

Final steps for installing the dial pointer after calibration.

SECTION 3 ADJUSTMENTS

SW, MW SECTION

Adjustment procedures for Shortwave and Medium Wave bands, including frequency coverage and tracking.

LW SECTION

Adjustment procedures for the Long Wave band, including antenna coil, tracking, and frequency coverage.

FM SECTION

Adjustment procedures for the Frequency Modulation band, including frequency coverage and tracking.

Alignment Procedures

Detailed alignment steps for FM discriminator, stereo separation, IF, and MPX circuits.

SECTION 4 DIAGRAMS

MOUNTING DIAGRAM

Shows the physical placement of components on the circuit boards.

SCHEMATIC DIAGRAM

SECTION 5 EXPLODED VIEWS

EXPLODED VIEWS

Illustrations showing parts arrangement for disassembly and reassembly.

SECTION 6 ELECTRICAL PARTS LIST

Electrical Parts List

Detailed catalog of semiconductors, transformers, capacitors, coils, diodes, ICs, and resistors.

ACCESSORIES AND PACKING MATERIALS

1/4 Watt Carbon Resistors

Table listing 1/4 Watt carbon resistor values and part numbers.

Hardware Nomenclature

Identification of various screws, nuts, and washers used in assembly.