Sony STR-W550 - Service Manual

STR-W550
Canadian Model
AEP Model
UK Model
E Model
Australian Model
Tourist Model
SERVICE MANUAL
FM STEREO/FM-AM RECEIVER
MICROFILM
STR-W550 is RECEIVER section in
MHC-W550
SPECIFICATIONS
Tuner section
FM stereo, FM/AM superheterodyne tuner
FM tuner section
Tuning range 87.5-108.0MHz (EXCEPT JE)
76.0-108.0MHz (JE)
Aerial FM lead aerial
Aerial terminals 75 ohm unbalanced
Intermediate frequency 10.7MHz
AM tuner section
Tuning range (Canadian,Thai,Argentine,Australian,E2)
AM: 530-1,710kHz
(with interval set at 10kHz)
531-1,710kHz
(with interval set at 9kHz)
(EXCEPT Canadian,Thai,Argentine,
Australian,E2)
MW: 531-1,602kHz
(with interval set at 9kHz)
(AEP,UK)
LW: 153-279kHz
(with interval set at 3kHz)
(EXCEPT AEP,UK,Canadian,Thai,
Argentine,Australian,E2)
SW: 5.95-17.90MHz
(with interval set at 9kHz)
Intermediate frequency 450kHz
Aerial AM loop aerial,
External aerial terminal
Video section
Inputs AV INPUT VIDEO
(phone jack) :
1 Vp-p, 75 ohms
MONITOR OUT
(phone jack) :
1 Vp-p, 75 ohms
Amplifier section
DIN power output 80W +80W
(6 ohms at 1kHz, DIN)
Music power output 190W + 190W
(6 ohms at 1kHz, 10%, THD)
Inputs MD/VIDEO 1 IN (phono jacks) : voltage 250 mV,
impedance 47 kilo ohms AV INPUT AUDIO
(phone jacks) : voltage 250 mV, impedance 47
kilo ohms
MIX/MIC (phone jack) :sensitivity 1mV,
impedance 10 kilo ohms
Outputs MD/VIDEO 1 OUT
(phone jacks) : voltage 250
mV, impedance 1 kilo ohm
PHONES (stereo phone
jack) : accepts headphone
of 8 ohms or more.
SPEAKER : accepts
impedance of 6 to 16
ohms
SUPER WOOFER :
Voltage 1 V, impedance 1
kilo ohms
— Continued on next page —
E2 : Tuner sections SW band do not exist.

Summary

Specifications

Tuner Section

Amplifier Section

Power output, music power, and input/output specifications.

Test Modes

Operational Test Procedures

Electrical Adjustments

Tuner and FM Adjustment Procedures

Steps for adjusting AM/FM reception and polar settings.

Diagrams

Tuner Section Diagrams

Main and Power Section Diagrams

Integrated Circuit (IC) Information

IC Pin Functions

Detailed pin assignments and descriptions for key integrated circuits.

IC Block Diagrams

Electrical Parts List

Component Lists by Section

Detailed lists of electronic components for various sections.

Sony STR-W550 Specifications

General

Power output	70 watts per channel into 8Ω (stereo)
Frequency response	10Hz to 50kHz
Total harmonic distortion	0.08%
Input sensitivity	2.5mV (MM), 200mV (line)
Dimensions	430 x 150 x 340mm
Weight	8.2kg
Speaker load impedance	8 ohms