Sony str de 491 rec service manual
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Ñ 2 Ñ AM tuner sectionTuning range 10kHz interval** 530 Ð 1,710kHz 9kHz interval 531 Ð 1,710kHz Antenna Loop antenna Intermediate frequency 450kHz Usable sensitivity 50dB/m (at 1,000kHz) S/N 54dB (at 50mV/m) Harmonic distortion 0.5% (50mV/m, 400Hz) Selectivity At 10kHz: 40dB At 9kHz: 35dB ** You can change the AM tuning interval between 9kHz and 10kHz. After tuning in any AM station, turn off the receiver. Hold down the PRESET TUNING+ buttoh and press the 1/u (power) button. All preset stations will be erased when you change the interval. To reset the interval, repeat the procedure. VIDEO section (except STR-SE491)Inputs VIDEO, TV/SAT, 5.1CH/DVD: 1Vp-p 75W Outputs VIDEO, MONITOR: 1Vp-p 75W GeneralSystem Tuner section: PLL quartz-locked digital synthesizer system Preamplifier section: Low-noise NF type equalizer Power amplifier section: Pure-complementary SEPP Power requirements 120V AC, 60Hz Power consumption 220W AC outlets STR-DE535/SE491: 2 switched, total 120W/1A Max STR-DE435: 1 switched, total 120W/1A Max Dimensions 430 ´ 157 ´ 366 mm (17 ´ 6 1/8 ´ 14 5/8 inches) Mass (Aporox.) STR-DE535: 11.1kg (24 lb 6 oz) STR-DE435: 11.0kg (24 lb 3 oz) STR-DE491: 11.2kg (24 lb 9 oz) Supplid accessories FM wire antenna (1) AM loop antenna (1) Remote commander (remote) (1) LR6 (size - AA) batteries (3) (STR-DE535 only) R6 (size - AA) batteries (2) (STR-DE435/SE491 only) * Depending on the sound field setting and the source, there may be no sound output. Design and specifications are subject to change without notice. Parts No. MODEL IDENTIFICATION Ñ BACK PANEL Ñ MODEL PARTS No. DE535: US model 4-216-927-0¹ DE535: Canadian model 4-216-927-1¹ DE535: Australian model 4-216-927-2¹ DE535: E model 4-216-927-3¹ DE535: Malaysia, Singapore model 4-216-927-4¹ V525: Chinese model 4-216-927-5¹ DE435: US model 4-217-181-0¹ DE435: Canadian model 4-217-181-1¹ DE435: Australian model 4-217-181-2¹ DE435: Malaysia, Singapore model 4-217-181-3¹ V424: Chinese model 4-217-181-4¹ DE435: AEP model 4-217-181-5¹ DE435: East European, CIS model 4-217-181-6¹ SE491: US model 4-217-181-7¹
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Ñ 3 Ñ 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. After correcting the original service problem, perform the following safety checks before releasing the set to the customer: Check the antenna terminals, metal trim, ÒmetallizedÓ knobs, screws, and all other exposed metal parts for AC leakage. Check leakage as described below. LEAKAGE The AC leakage from any exposed metal part to earth ground and from all exposed metal parts to any exposed metal part having a return to chassis, must not exceed 0.5 mA (500 microamperes). Leakage current can be measured by any one of three methods. 1. A commercial leakage tester, such as the Simpson 229 or RCA WT-540A. Follow the manufacturersÕ instructions to use these instruments. 2. A battery-operated AC milliammeter. The Data Precision 245 digital multimeter is suitable for this job. 3. Measuring the voltage drop across a resistor by means of a VOM or battery-operated AC voltmeter. The ÒlimitÓ indication is 0.75 V, so analog meters must have an accurate low-voltage scale. The Simpson 250 and Sanwa SH-63Trd are examples of a passive VOM that is suitable. Nearly all battery operated digital multimeters that have a 2V AC range are suitable. (See Fig. A) SAFETY CHECK-OUT To Exposed Metal Parts on Set 0.15 µF 1.5 k ½ AC Voltmeter (0.75 V) Earth Ground Fig. A. Using an AC voltmeter to check AC leakage. ATTENTION AU COMPOSANT AYANT RAPPORT Ë LA SƒCURITƒ! LES COMPOSANTS IDENTIFƒS PAR UNE MARQUE ! SUR LES DIAGRAMMES SCHƒMATIQUES ET LA LISTE DES PIéCES SONT CRITIQUES POUR LA SƒCURITƒ DE FONCTIONNEMENT. NE REMPLACER CES COMPOSANTS QUE PAR DES PIéSES SONY DONT LES NUMƒROS SONT DONNƒS DANS CE MANUEL OU DANS LES SUPPƒMENTS PUBLIƒS PAR SONY. TABLE OF CONTENTS 1. GENETAL ááááááááááááááááááááááááááááááááááááááááááááááááááá\ áááááááááááááááááááááááá 4 2. TEST MODE ááááááááááááááááááááááááááááááááááááááááááááááááááá\ ááááááááááááááááááá 6 3. DIAGRAMS 3-1. Circuit Boards Location ááááááááááááááááááááááááááááááááááááááááááááááááááá\ áá 7 3-2. Block Diagrams ááááááááááááááááááááááááááááááááááááááááááááááááááá\ ááááááááááááááá 9 ¥ Main Section ááááááááááááááááááááááááááááááááááááááááááááááááááá\ ááááááááááááááááá 9 ¥ Power Section ááááááááááááááááááááááááááááááááááááááááááááááááááá\ ááááááááááááá 11 3-3. Printed Wiring Board Ñ Input Section Ñ ááááááááááááááááááááááá 13 3-4. Schematic Diagram Ñ Input Section Ñ áááááááááááááááááááááááááá 15 3-5. Printed Wiring Board Ñ Surround Section Ñ ááááááááááááááááá 17 3-6. Schematic Diagram Ñ Surround Section Ñ ááááááááááááááááááá 19 3-7. Printed Wiring Board Ñ Display Section Ñ ááááááááááááááááááá 21 3-8. Schematic Diagram Ñ Display Section Ñ áááááááááááááááááááááá 23 3-9. Printed Wiring Board Ñ Key Section Ñ ááááááááááááááááááááááááá 25 3-10. Schematic Diagram Ñ Key Section Ñ ááááááááááááááááááááááááááá 27 3-11. Printed Wiring Board Ñ Rear Amp Section Ñ ááááááááááááááá 29 3-12. Schematic Diagram Ñ Rear Amp Section Ñ áááááááááááááááááá 31 3-13. Printed Wiring Board Ñ Power Amp Section Ñ ááááááááááááá 33 3-14. Schematic Diagram ÑPower Amp Section Ñ áááááááááááááááá 35 3-15. IC Pin Function Description ááááááááááááááááááááááááááááááááááááááááááááá 37 3-16. IC Block Diagrams ááááááááááááááááááááááááááááááááááááááááááááááááááá\ áááááááá 39 4. EXPLODEO VIEWS 4-1. Front Panel Section ááááááááááááááááááááááááááááááááááááááááááááááááááá\ ááááááá 40 4-2. Chassis Section ááááááááááááááááááááááááááááááááááááááááááááááááááá\ áááááááááááááá 42 5. ELECTRICAL PARTS LIST ááááááááááááááááááááááááááááááááááááááá 44