Sony STR-W550 Service Manual
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Sony STR-W550 Service Manual

Fm stereo/fm-am receiver
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SERVICE MANUAL
STR-W550 is RECEIVER section in
MHC-W550
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
MICROFILM
STR-W550

SPECIFICATIONS

Amplifier section
DIN power output
Music power output
Inputs
Outputs
E2 : Tuner sections SW band do not exist.
FM STEREO/FM-AM RECEIVER
Canadian Model
AEP Model
UK Model
E Model
Australian Model
Tourist Model
80W +80W
(6 ohms at 1kHz, DIN)
190W + 190W
(6 ohms at 1kHz, 10%, THD)
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
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 —

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Summary of Contents for Sony STR-W550

  • Page 1 STR-W550 SERVICE MANUAL Canadian Model AEP Model UK Model E Model Australian Model Tourist Model STR-W550 is RECEIVER section in MHC-W550 SPECIFICATIONS Tuner section Amplifier section DIN power output 80W +80W FM stereo, FM/AM superheterodyne tuner (6 ohms at 1kHz, DIN)

  • Page 2: Table Of Contents

    CND : Canadian CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE EE : East European REMPLACER CES COMPOSANTS QUE PAR DES PIÈSES SONY E2 : Tuner sections SW band do not exist. DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU E3 : Tuner sections SW band exist.

  • Page 3: General

    SECTION 1 GENERAL — FRONT PANEL — !ª KARAOKE PON/MPX button PLAY MODE button @º SURROUND button 1/ALL DISCS button @¡ EFFECT ON/OFF button REPEAT button @™ MUSIC button HIGH FREQ button @£ MOVIE button ENTER/NEXT button @¢ GAME button MULTI JOG STATION dial @∞...
  • Page 4 — BACK PANEL — Photo : E MODEL #¶ ANTENNA terminal #• SYSTEM CONTROL #ª MD/VIDEO jack $º FRONT SPEAKER terminal $¡ SUPER WOOFER jack $™ MONITOR OUT jack $£ VOLTAGE SELECTOR switch (E, Saudi Arabia, Singapore, Malaysia, Hong Kong, Taiwan, Indonesian, Argentine, Tourist MODEL) —...

  • Page 5: Test Mode

    SECTION 2 SECTION 3 TEST MODE ELECTRICAL ADJUSTMENTS FL DISPLAY/KEY LED TEST MODE AGING MODE Procedure : (AEP, UK, East European, CIS model) (East European, CIS model) Press the REPEAT, ENTER/NEXT and SURROUND buttons CD aging mode Note: As a front-end (FE1) is difficult to repair if faulty, replace it FM Polar Adjustment 1.

  • Page 6: Circuit Boards Location

    STR-W550 SECTION 4 4-2. PRINTED WIRING BOARD — TUNER SECTION — (AEP, UK) (East European, CIS) DIAGRAMS 4-1. CIRCUIT BOARDS LOCATION PRI BOARD DUMMY BOARD SEC BOARD TCB BOARD (AEP, UK, EE, CIS MODEL) ENCAPSULATED COMPONENT (EXCEPT AEP, UK, EE, CIS MODEL)

  • Page 16: Ic Pin Function

    4-9. IC PIN FUNCTION • IC501 TMP87CM75F-6608 (DISPLAY CONTROL) Pin No. Pin Name Description — Not used — POWER SUPPLY FOR VFT DRIVER COM CLK Transfer clock output serial data ST DATA IN Serial data input COM DATA Serial data output ST CE Chip enable output LED LAT...
  • Page 17 Pin No. Pin Name Description FL–1G FL–2G FL–3G FL–4G FL–5G FL–6G Grid output to FL501 FL–7G FL–8G FL–9G FL–10G FL–11G FL–12G FL–13G FL–14G FL–P1 FL–P2 FL–P3 FL–P4 FL–P5 FL–P6 FL–P7 FL–P8 FL–P9 FL–P10 FL–P11 FL–P12 FL–P13 FL–P14 FL–P15 FL–P16 FL–P17 Segment output to FL501 FL–P18 FL–P19...

  • Page 18: Ic Block Diagrams

    4-10. IC BLOCK DIAGRAMS IC21 LC72130 PHASE DETECTOR CHARGE PUMP UNLOCK POWER DETECTOR RESET REFERENCE SWALLOW COUNTER DIVIDER 1/16, 1/17 4BITS 12BITS PROGRAMMABLE DRIVER UNIVERSAL DATA SHIFT REGISTER LATCH COUNTER 3 4 5 6 IC41 LA1835 17 16 DECODER RF. AMP ANTI BIRDIE BUFF STEREO...
  • Page 19 IC105 M62427FP-A KEY IN2 BB22 SBAND GRAPHIC EQUALIZER – BPF OUT BUF IN1 – BPF IN BUF OUT1 IN 2B AVDD – – – DGND IN 2A LATCH – U-CON AVSS INTER DATA – – FACE CLOCK AGND IN 1A DVDD PORT C –...

  • Page 20: Main Section

    SECTION 5 EXPLODED VIEWS Note: • -XX, -X mean standardized parts, so they may • Abbreviations The components identified by mark ! or have some differences from the original one. TH : Thai : Singapore dotted line with mark ! are critical for safety. •...

  • Page 21: Panel Section

    * 64 A-4398-480-A PANEL BOARD, COMPLETE (AEP,UK) * 64 A-4398-481-A PANEL BOARD, COMPLETE (EE,CIS) X-4948-610-1 PANEL ASSY, FRONT (AEP,UK) 4-962-708-11 EMBLEM (4-A), SONY * 64 A-4398-482-A PANEL BOARD, COMPLETE (CND) X-4948-612-1 DISPLAY ASSY, BUTTON * 64 A-4403-302-A PANEL BOARD, COMPLETE (JE)

  • Page 22: Electrical Parts List

    Note: SECTION 6 When indicating parts by reference number, please include the board naame. ELECTRICAL PARTS LIST The components identified by mark ! or • Items marked “*” are not stocked since they • SEMICONDUCTORS dotted line with mark ! are critical for safety. are seldom required for routine service.
  • Page 23 AVIN MAIN Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks R954 1-249-437-11 CARBON 1/4W C106 1-137-375-11 FILM 0.068uF R956 1-249-429-11 CARBON 1/4W C107 1-137-440-11 FILM 0.018uF R957 1-249-429-11 CARBON 1/4W C108 1-137-440-11 FILM 0.018uF R958 1-249-429-11 CARBON 1/4W C109 1-137-437-11 FILM...
  • Page 24 MAIN Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks C852 1-126-923-11 ELECT 220uF < TRANSISTOR > C853 1-126-933-11 ELECT 100uF C858 1-104-664-11 ELECT 47uF Q111 8-729-119-78 TRANSISTOR 2SC403SP-51 C859 1-126-961-11 ELECT 2.2uF Q112 8-729-119-78 TRANSISTOR 2SC403SP-51 C861 1-164-159-11 CERAMIC 0.1uF...
  • Page 25 MAIN MIC ECHO Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks R155 1-249-429-11 CARBON 1/4W R859 1-249-439-11 CARBON 1/4W R156 1-249-429-11 CARBON 1/4W ! R870 1-215-892-11 METAL OXIDE R158 1-247-897-00 CARBON 560K 1/4W (EXCEPT CND) R159 1-249-419-11 CARBON 1.5K 1/4W F...
  • Page 26 MIC ECHO PANEL VOLUME Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks C6024 1-162-282-31 CERAMIC 100PF < CAPACITOR > C6025 1-124-257-00 ELECT 2.2uF C6026 1-124-261-00 ELECT 10uF C501 1-164-159-11 CERAMIC 0.1uF C6027 1-124-261-00 ELECT 10uF C502 1-164-159-11 CERAMIC 0.1uF C6030...
  • Page 27 PANEL VOLUME Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks D537 8-719-032-86 DIODE SEL5420E R518 1-249-421-11 CARBON 2.2K 1/4W F D538 8-719-046-44 DIODE SEL5221S R519 1-247-843-11 CARBON 3.3K 1/4W D539 8-719-046-44 DIODE SEL5221S R520 1-249-427-11 CARBON 6.8K 1/4W F D540...
  • Page 28 PANEL VOLUME Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks R614 1-249-409-11 CARBON 1/4W F S524 1-762-751-11 SWITCH, TACTILE (TUNER BAND) R615 1-249-409-11 CARBON 1/4W F S525 1-762-751-11 SWITCH, TACTILE (TIMER SELECT) R616 1-247-843-11 CARBON 3.3K 1/4W S526 1-762-751-11 SWITCH, TACTILE (CLOCK TIMER SET)
  • Page 29 Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks < RESISTOR > 1-163-909-11 CERAMIC CHIP 0.047uF (AEP,UK) ! R853 1-219-123-11 FUSIBLE 0.47 1/4W F 1-163-989-11 CERAMIC CHIP 0.033uF ! R854 1-219-123-11 FUSIBLE 0.47 1/4W F (EE,CIS) ! R855 1-219-121-11 FUSIBLE 0.22 1/4W F...
  • Page 30 Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks C1727 1-126-960-11 ELECT < IC > (EE,CIS) C1728 1-126-966-11 ELECT 33uF IC21 8-759-288-54 IC LC72130 (EE,CIS) IC41 8-759-176-03 IC LA1835 C1751 1-164-159-21 CERAMIC 0.01uF IC1701 8-759-063-04 IC IR3R42 (EE,CIS) (AEP,UK) IC1702 8-759-140-53 IC MC14053BCP (EE,CIS)
  • Page 31 Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks Q1701 8-729-424-08 TRANSISTOR MUN2111T1 (EE,CIS) 1-216-065-00 METAL CHIP 4.7K 1/10W Q1702 8-729-907-00 TRANSISTOR RT1N141M-TP-1 (EE,CIS) 1-216-065-00 METAL CHIP 4.7K 1/10W Q1703 8-729-421-22 TRANSISTOR MUN2211T1 (EE,CIS) 1-249-429-11 CARBON 1/4W 1-216-162-00 CHIP (3216) 1/8W <...
  • Page 32 Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks < VARIABLE RESISTOR > ************** HARDWARE LIST RV41 1-238-601-11 ADJ, CARBON 22K ************** RV42 1-238-600-11 ADJ, CARBON 10K RV1701 1-238-600-11 ADJ, CARBON 10K (EE,CIS) 7-685-872-09 SCREW +BVTT 3X8 (S) RV1702 1-238-599-11 ADJ, CARBON 4.7K (EE,CIS) 7-685-881-09 SCREW +BVTT 4X8 (S) 7-685-646-79 SCREW +BVTP 3X8 TYPE2 N-S...
  • Page 33 STR-W550 Sony Corporation 97F1681-1 Printed in Japan © 1997.6 9-920-914-11 Home A&V Products Company Published by General Engineering Dept. — 48 — (Shibaura)

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