Sony hcd rx 77 s service manual
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Ð 2 Ð Specifications (continued) Inputs MD/VIDEO IN: voltage 450 mV/250mV, (phono jacks) impedance 47 kilohms MIX MIC: (phone jack) sensitivity 1 mV, impedance 10 kilohms Outputs MD/VIDEO OUT: voltage 250 mV, (phono jacks) impedance 1 kilohms PHONES: accepts headphones of 8 ohms (stereo phone jack) or more SPEAKER: European and Russian models: accepts impedance of 6 to 16 ohms Other models: accepts impedance of 8 to 16 ohms SURROUND SPEAKER (Canadian model): accepts impedance of 16 ohms SUPER WOOFER (GRX7/GRX7J/RX77: Canadian models): Voltage 1 V, impedance 1 kilohm CD player section System Compact disc and digital audio system Laser Semiconductor laser (l=780nm) Emission duration: continuous Laser output Max. 44.6 mW* *This output is the value measured at distance of 200 mm from the objective lens surface on the Optical Pick-up Block with 7 mm aperture. Frequency response 2 Hz - 20 kHz (±0.5 dB) Wavelength 780 -790 nm Signal-to-noise ratio More than 90 dB Dynamic range More than 90 dB CD OPTICAL DIGITAL OUT (Square optical connector jack, rear panel) Wavelength 600 nm Output Level -18 dBm Tape player section Recording system 4-track 2-channel stereo Frequency response 40 - 13,000 Hz (±3 dB), (DOLBY NR OFF) using Sony TYPE I cassette 40 - 14,000 Hz (±3 dB), using Sony TYPE II cassette Tuner section FM stereo, FM/AM superheterodyne tuner FM tuner sectionTuning range 87.5 - 108.0 MHz Antenna FM lead antenna Antenna terminals 75 ohm unbalanced Intermediate frequency 10.7 MHz UKV tuner section (4 band models only)Tuning range 65.0 - 74.0 MHz Stereo Plus AM tuner sectionTuning range 2 Band type: Canadian model: 530 - 1,710 kHz (with the interval set at 10 kHz) 531 - 1,710 kHz (with the interval set at 9 kHz) Other model: 531 - 1,602 kHz (with the interval set at 9 kHz) 530 - 1,710 kHz (with the interval set at 10 kHz) 3 Band/4 Band type: European and Russian models: MW: 531 - 1,602 kHz (with the interval set at 9 kHz) LW: 153 - 279 kHz (with the interval set at 3 kHz)Middle Eastern models: MW: 531 - 1,602 kHz (with the interval set at 9 kHz) SW: 5.95 - 17.90 MHz (with the interval set at 5 kHz) Other models: MW: 531 - 1,602 kHz (with the interval set at 9 kHz) 530 - 1,710 kHz (with the interval set at 10 kHz) SW: 5.95 - 17.90 MHz (with the interval set at 5 kHz) Antenna AM loop antenna Antenna terminals External antenna terminal Intermediate frequency 450 kHz General Power requirements Canadian model: 120 V AC, 60 Hz European and Russian models: 230 V AC, 50/60 Hz Mexican model: 120 V AC, 50/60 Hz Australian and Israel models: 220 - 240 V AC, 50/60 Hz Thai model: 220 - 240 V AC, 50/60 Hz Other models: 110 - 120 V or 220 - 240 V AC, 50/60 Hz Power consumption Canadian model: 195 watts European and Russian models: 140 watts Other models: 250 watts Dimensions (w/h/d) Approx. 280 ´ 335 ´ 380 mm (11 1/8 ´ 13 1/8 ´ 15 in.) Mass Canadian model: Approx. 9.5 kg (20 lbs. 15 oz.) European and Russian models: Approx. 9.1 kg (20 lbs. 1 oz.) Other models: Approx. 10.2 kg (22 lbs. 8 oz.) Supplied accessories: AM loop antenna (1) Remote RM-SR5 (1) Batteries (2) FM lead antenna (1) Speaker cords (2) Front speaker pads (8) Design and specifications are subject to change without notice.
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Ð 3 Ð 1. SERVICING NOTES ............................................... 3 2. GENERAL Location of Controls ....................................................... 6 Setting the Time .............................................................. 7 3. DISASSEMBLY ......................................................... 8 4. TEST MODE .............................................................. 11 5. MECHANICAL ADJUSTMENTS ....................... 13 6. ELECTRICAL ADJUSTMENTS DECK Section ................................................................. 13 TUNER Section .............................................................. 16 CD Section ...................................................................... 18 7. DIAGRAMS ................................................................. 20 7-1. Block Diagram Ð TUNER Section (AEP, UK, German models only) Ð ................................ 21 7-2. Block Diagram Ð TUNER Section (East European, CIS models only) Ð .............................. 23 7-3. Block Diagram Ð CD MECHANISM DECK Section Ð .......................... 25 7-4. Block Diagram Ð TAPE DECK Section Ð ...................... 27 7-5. Block Diagram Ð MAIN Section Ð ................................. 29 7-6. Block Diagram Ð DISPLAY/KEY CONTROL/ POWER SUPPLY Section Ð ......................................... 31 7-7. Schematic Diagram Ð TUNER Section (AEP, UK, German models only) Ð ................................ 35 7-8. Printed Wiring Board Ð TUNER Section (AEP, UK, German models only) Ð ................................ 37 7-9. Printed Wiring Board Ð TUNER Section (East European, CIS models only) Ð .............................. 38 7-10. Schematic Diagram Ð TUNER Section (East European, CIS models only) Ð .............................. 39 7-11. Printed Wiring Board Ð CD Section Ð ........................... 41 7-12. Schematic Diagram Ð CD Section Ð ............................... 43 7-13. Printed Wiring Boards Ð CD MOTOR Section Ð .......... 45 7-14. Schematic Diagram Ð CD MOTOR Section Ð .............. 47 7-15. Printed Wiring Board Ð TAPE DECK Section Ð ........... 49 7-16. Schematic Diagram Ð TAPE DECK Section Ð .............. 51 7-17. Printed Wiring Board Ð LEAF SW Section Ð ............... 53 7-18. Schematic Diagram Ð LEAF SW Section Ð .................. 53 7-19. Printed Wiring Board Ð MAIN Section Ð ...................... 55 7-20. Schematic Diagram Ð MAIN Section (1/4) Ð ............... 57 7-21. Schematic Diagram Ð MAIN Section (2/4) Ð ................ 59 7-22. Schematic Diagram Ð MAIN Section (3/4) Ð ................ 61 7-23. Schematic Diagram Ð MAIN Section (4/4) Ð ................ 63 7-24. Printed Wiring Board Ð PANEL Section Ð .................... 65 7-25. Schematic Diagram Ð PANEL Section Ð ....................... 67 7-26. Printed Wiring Board Ð CD-SW Section Ð .................... 69 7-27. Schematic Diagram Ð CD-SW Section Ð ...................... 69 7-28. Printed Wiring Board Ð HP Section Ð ........................... 71 7-29. Schematic Diagram Ð HP Section Ð .............................. 71 7-30. Printed Wiring Board Ð POWER AMP Section Ð ......... 72 7-31. Schematic Diagram Ð POWER AMP Section Ð ............ 73 7-32. Printed Wiring Board Ð TRANSFORMER Section Ð ........................................ 75 7-33. Schematic Diagram Ð TRANSFORMER Section Ð ........................................ 76 7-34. IC Pin Function Description ........................................... 82 8. EXPLODED VIEWS ................................................ 87 9. ELECTRICAL PARTS LIST ............................... 96 TABLE OF CONTENTS The laser diode in the optical pick-up block may suffer electro- static break-down because of the potential difference generated by the charged electrostatic load, etc. on clothing and the human body. During repair, pay attention to electrostatic break-down and also use the procedure in the printed matter which is included in the repair parts. The flexible board is easily damaged and should be handled with care. NOTES ON LASER DIODE EMISSION CHECK The laser beam on this model is concentrated so as to be focused on the disc reflective surface by the objective lens in the optical pick-up block. Therefore, when checking the laser diode emis- sion, observe from more than 30 cm away from the objective lens. Notes on chip component replacement ¥ Never reuse a disconnected chip component. ¥ Notice that the minus side of a tantalum capacitor may be dam- aged by heat. Flexible Circuit Board Repairing ¥ Keep the temperature of the soldering iron around 270 ûC dur- ing repairing. ¥ Do not touch the soldering iron on the same conductor of the circuit board (within 3 times). ¥ Be careful not to apply force on the conductor when soldering or unsoldering. NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT CAUTION Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous ra- diation exposure. This appliance is classified as a CLASS 1 LASER product. The CLASS 1 LASER PRODUCT MARKING is located on the rear exterior. Laser component in this product is capable of emitting radiation exceeding the limit for Class 1. The following caution label is located inside the unit. CAUTION : INVISIBLE LASER RADIATION WHEN OPEN AND INTERLOCKS DEFEATED. AVOID EXPOSURE TO BEAM. ADVARSEL : USYNLIG LASERSTRÅLING VED ÅBNING NÅR SIKKERHEDSAFBRYDERE ER UDE AF FUNKTION. UNDGÅ UDSAETTELSE FOR STRÅLING. VORSICHT : UNSICHTBARE LASERSTRAHLUNG, WENN ABDECKUNG GEÖFFNET UND SICHEREITSVERRIEGELUNG ÜBERBRÜCKT. NICHT DEM STRAHL AUSSETZEN. VA R O ! :AVATTAESSA JA SUOJALUKITUS OHITETTAESSA OLET ALT- TIINA NÄKYMÄTTÖMÄLLE LASERSÄTEILYLLE. ÄLÄ KATSO SÄTEESEEN. VARNING : OSYNLING LASERSTRÅLING NÄR DENNA DEL ÄR ÖPPNAD OCH SPÄRREN ÄR URKOPPLAD. BETRAKTA EJ STRÅLEN. ADVERSEL : USYNLIG LASERSTRÅLING NÅR DEKSEL ÅPNES OG SIKKERHEDSLÅS BRYTES. UNNGÅ EKSPONERING FOR STRÅLEN. VIGYAZAT !:A BURKOLAT NYITÁSAKOR LÁTHATATLAN LÉZERSU- GÁRVESZÉLY ! KERÜLJE A BESUGÁRZÁST ! SECTION 1 SERVICING NOTES