Sony str w 777 service manual

Page 1

Ñ 2 Ñ Output MD/VIDEO 1 OUT (phono jacks): voltage 450/250mV, impedance 1kW PHONES (stereo phone jack): accepts headphones of 8W or more. FRONT SPEAKER: accepts impedance of 6 to 16W CENTER SPEAKER: accepts impedance of 8 to 16W REAR SPEAKER: accepts impedance of 8 to 16W SUPER WOOFER: Voltage 1V, impedance 1kW Video sectionInputs AV INPUT VIDEO (phone jack): 1Vp-p, 75W Outputs MONITOR OUT (phone jack): 1Vp-p, 75W Tuner sectionFM stereo, FM/AM superheterodyne tuner FM tuner sectionTuning range 3 band type model 87.5 Ð 108.0MHz (50kHz step) 4 band type model 65.0 Ð 74.0MHz (10kHz step) 87.5 Ð 108.0MHz (50kHz step) Aerial FM lead aerial Aerial terminals 75W unbalanced Intermediate frequency 10.7MHz UKV tuner section (4 band type model only)Tuning range 65.0 Ð 74.0MHz (10kHz step) Polar Stereo AM tuner sectionTuning range Australian model: 531 Ð 1,602kHz (with the AM tuning interval set at 9kHz) 530 Ð 1,710kHz (with the AM tuning interval set at 10kHz) Other models: MW: 531 Ð 1,602kHz (with the MW tuning interval set at 9kHz) 530 Ð 1,710kHz (with the MW tuning interval set at 10kHz) SW: 5.95 Ð 17.90MHz (with the SW tuning interval set at 5kHz) LW: 153 Ð 279kHz (with the interval set at 3kHz) Intermediate frequency 450kHz Antenna AM loop antenna External antenna terminal GeneralPower requirements Australian models: 240V AC, 50/60Hz AEP, UK, East European, CIS models: 230V AC, 50/60Hz Other models: 120V or 220V or 230 Ð 240, 50/60Hz Adjustable with voltage selector Power consumption 270W (AEP, UK, East European, CIS models) 300W (Other models) Dimensions (w/h/d) Approx. 288 ´ 205 ´ 375mm Mass Approx. 8.8kg Supplied accessories: AM loop antenna (1) Remote RM-SR77 (1) Size AA (R6) batteries (2) FM lead antenna (1) Speaker cords (5) Front speaker pads (8) Design and specifications are subject to change without notice.

Page 2

Ñ 3 Ñ TABLE OF CONTENTS 1. GENERAL ........................................................................... 4 2. DISASSEMBLY ¥ Sliding Panel Assembly ...................................................... 5 3. SERVICE MODE .............................................................. 6 4. ELECTRICAL ADJUSTMENT ................................... 11 5. DIAGRAMS 5-1. Circuit Boards Location ááááááááááááááááááááááááááááááááááááááááááááááááááá\ 12 5-2. Block Diagrams ¥ Tuner Section (AEP, UK model) áááááááááááááááááááááááááááááááááááá 13 ¥ Tuner Section (East European, CIS model) ááááááááááááááááááá 15 ¥ Main Section ááááááááááááááááááááááááááááááááááááááááááááááááááá\ ááááááááááááááá 17 ¥ Power Section ááááááááááááááááááááááááááááááááááááááááááááááááááá\ ááááááááááááá 19 5-3. Schematic Diagram ÐTuner (AEP, UK model) Section Ð ááááááááááááááááááááááááááááááááá 23 5-4. Printed Wiring Board ÐTuner (AEP, UK model) Section Ð ááááááááááááááááááááááááááááááááá 25 5-5. Printed Wiring Board ÐTuner (East European, CIS model) Section Ð áááááááááááááááá 26 5-6. Schematic Diagram ÐTuner (East European, CIS model) Section Ð áááááááááááááááá 27 5-7. Printed Wiring Board Ð Main Section Ð ááááááááááááááááááááááááááá 29 5-8. Schematic Diagram Ð Main (1/2) Section Ð ááááááááááááááááááááá 31 5-9. Schematic Diagram Ð Main (2/2) Section Ð ááááááááááááááááááááá 33 5-10. Schematic Diagram Ð AV/Mic Section Ð áááááááááááááááááááááááááá 35 5-11. Printed Wiring Board Ð AV/Mic Section Ð ááááááááááááááááááááááá 36 5-12. Schematic Diagram Ð Power Amp Section Ð ááááááááááááááááááá 37 5-13. Printed Wiring Board Ð Power Amp Section Ð ááááááááááááááááá 39 5-14. Schematic Diagram Ð Display Section Ð áááááááááááááááááááááááááá 41 5-15. Printed Wiring Board Ð Display Section Ð ááááááááááááááááááááááá 43 5-16. Schematic Diagram Ð Sliding Panel Section Ð ááááááááááááááááá 45 5-17. Printed Wiring Board Ð Sliding Panel Section Ð áááááááááááááá 47 5-18. Schematic Diagram Ð Surround Section Ð ááááááááááááááááááááááá 49 5-19. Printed Wiring Board Ð Surround Section Ð ááááááááááááááááááááá 51 5-20. Printed Wiring Board Ð Trans Section Ð ááááááááááááááááááááááááááá 53 5-21. Schematic Diagram Ð Trans Section Ð ááááááááááááááááááááááááááááá 55 5-22. IC Block Diagrams ááááááááááááááááááááááááááááááááááááááááááááááááááá\ áááááááá 56 5-23. IC Pin Function ááááááááááááááááááááááááááááááááááááááááááááááááááá\ ááááááááááááá 60 6. EXPLODED VIEWS 6-1. Case and Sliding Panel Section ........................................ 63 6-2. Front Panel Section .......................................................... 64 6-3. Slide Mechanism Section ................................................. 65 6-4. Circuit Boards and Back Panel Section ............................ 66 7. ELECTRICAL PARTS LIST ........................................ 67 SAFETY-RELATED COMPONENT WARNING !! COMPONENTS IDENTIFIED BY MARK ! OR DOTTED LINE WITH MARK ! ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY. LABEL MODEL NUMBER No. MODEL IDENTIFICATION Ñ BACK PANEL Ñ Saudi Arabia, Singapore, Malaysia 4-900-848-2¹ Thai, Australian 4-900-848-3¹ AEP, UK, East European, CIS 4-900-848-4¹ MODEL PART No.