Sony STR-GX215 Service Manual

STR-GX210/GX810/GX415
SERVICE MANUAL
AEP Model
STR-GX215/GX3 15/GX415
East European Model
STR-GX215/GX315
UK Model
STR-GX315
PHOTO: STR-GX415
SPECIFICATIONS
Amplifier section
AEP1, German, 90W+90W 70W+70W
East European, (4ohms) (4ohms)
UK model 80W+80W 50W+50W
DIN, IkHz (80hms) (80hms)
80W+80W 70W+70W 50W+50W
(80hms) (80hms) (80hms)
40Hz-20kHz
THD 0.3%
Harmonic distortion
Less than 0.8% at rated output
Frequency response
PHONO: RIAA equalization curve +0.5dB
CD
VIDEO | 10Hz-50kHz ‘3 dB
TAPE
Input
Sensitivity Impedance S/N (weighting network,
input level)
PHONO 2.5mV 50kilohms 75d B(A net)
75dB*(A net, 5.0 mV)
CD, VIDEO, — | 250mV 5O0kilohms 82dB (A net)
TAPE 1,2 82dB*(A net 500mV)
*78 THF
Outputs
REC OUT, Voltage 250mV
VIDEO (AUDIO) OUT Impedance 10kilohms
HEADPHONES Accepts low and high impedance
head phones
Tone controls
BASS: £10dB at 100Hz
TREBLE: +10dB at 10kHz
Loudness
+6dB (100Hz)
MICROFILM
Tuner section
Tuning range 87.5-108MHz 531-1602kHz
Antenna 75ohms, unbalanced
Sensitivity at 18.3dBf, 2.2nV (mono)
41dB quieting 40d Bf, 24.5yV (stereo)
Usable sensitivity 11.2d Bf, 1pV (IHF) Loop antenna:
300pV (at 999kHz)
Signal-to-noise ratio 70dB (mono) /66dB (stereo) | 54dB (at 50mV/m)
Harmonic distortion 0.3% (mono), 0.5% 0.5% (at 50mV/m,
(stereo) at 1kHz 400 Hz)
60dB at 400kHz 30dB at 10kHz
Frequency response 30Hz—15kHz “3° dB | —
General
System
Tuner section: PLL quartz-locked digital synthesizer system
Preamplifier section: low-noise NF type equalizer amp
Power amplifier section: pure complementary SEPP
Power requirements
220-230V AC, 50/60Hz
240V AC, 50/60Hz (U.K. model)
Power consumption
ara STR-GX415 STR-GX315 STR-GX215
AEP1, German model | 230W 200W 160W
AEP2, East European, | 165W 130W 110W
UK model
—Continued on next page— FM Stepeo
FM-AM Receiver
SONY.
FM tuner section AM tuner section
£ 8 Ei
=z

Sony STR-GX215 Specifications

General

Input Sensitivity	150 mV (line)
Tuning range	FM, MW
Speaker load impedance	8 ohms
Speaker Impedance	8 ohms
Total Harmonic Distortion	0.08%
Dimensions	430 x 130 x 300mm

Summary

Receiver Specifications Overview

Amplifier Section Performance

Details power output, distortion, frequency response of the amplifier.

Tuner Section Performance

Details sensitivity, selectivity, and signal-to-noise ratio of the tuner.

Input/Output and Tone Control Details

Specifies impedance, S/N, and tone control ranges for inputs and outputs.

Power Requirements and Consumption

Lists power supply needs and operational power draw of the receiver.

Receiver General Information and Front Panel Controls

Receiver Dimensions, Weight, and Accessories

Details physical specifications and included items for the receiver.

Model Identification and Safety Warnings

Explains model variants and critical component safety warnings.

Front Panel Controls and Indicators

Identifies all buttons, lights, and displays on the front panel.

Receiver Electrical Adjustment Procedures

FM Signal Level Display Adjustment

Procedure for adjusting the FM signal level display.

IC Pin Functions and Block Diagrams

System Control IC Pinout

Lists pinout details for the main system control IC (UPD78043GF-SOX4072).

Receiver System Block Diagram

Illustrates signal flow and component relationships within the receiver.

Circuit Board and Semiconductor Layouts

Circuit Boards Location

Diagrams showing the physical placement of various circuit boards.

Semiconductor Lead Layouts

Visual representation of common semiconductor pinouts.

Main Board Schematic Diagrams

GX215 Main Board Schematic

Detailed circuit diagram for the GX215 main board.

GX315/GX415 Main Board Schematic

Circuit diagram for the GX315 and GX415 main boards.

Display Section Schematics and IC Details

Printed Wiring Boards - Display Section

PCB layout for display components.

IC Block Diagrams and Waveforms

Explains IC functions and signal behavior in the display system.

Printed Wiring Boards Layouts

Main Section Printed Wiring Boards

PCB layout for the main board.

Power, SW, Transformer, and HP Boards

PCB layouts for ancillary boards like Power, SW, Transformer, and HP.

Main Board Wiring and Semiconductor Locations

Main Section Printed Wiring Board

Detailed PCB layout for the main board.

Semiconductor Location Table

Cross-references semiconductor part numbers to board locations.

Other Board Layouts and IC Details

Display Section Printed Wiring Boards

PCB layout for the display section.

Vol, Tone, and Standby Boards

PCB layouts for the Vol, Tone, and Standby boards.

Exploded Views of Receiver Components

Cabinet Section Exploded View

Illustrates the assembly of the receiver's cabinet.

Chassis Section Exploded View

Shows the assembly of the internal chassis components.

Electrical Parts List: Components

Introduction, Notes, and Abbreviations

Explains list conventions and component types.

Capacitors, Connectors, Diodes, Switches, ICs, and Transistors

Lists core electronic components like capacitors, connectors, diodes, switches, ICs, and transistors.

Electrical Parts List: Resistors and Coils

Resistor Part Numbers and Specifications

Details various carbon and wirewound resistors.

Coil Part Numbers

Lists various coils used in the circuit.

Electrical Parts List: Semiconductors and Special Components

Transistor, Diode, and IC Part Numbers

Lists semiconductor components including transistors, diodes, and ICs.

Transformers, Fuses, Relays, Vibrators, and Encapsulated Components

Lists specialized components and power parts like transformers, fuses, relays, vibrators, and encapsulated units.