Sony str de 375 service manual

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2 STR-DE375 MODEL IDENTIFICATION - BACK PANEL - Parts No. MODEL PARTS No. AEP model 4-232-119-0s UK model 4-232-119-1s Malaysia,Singapore model 4-232-119-3s E model 4-232-119-4s Canadian model 4-232-119-5s Argentina model 4-232-119-7s System Power requirementsPower consumption Dimensions Mass (Approx.) Supplied accessories Tuner section: PLL quartz-locked digital synthesizer system Preamplifier section: Low-noise NF type equalizer Power amplifier section: Pure-complementary SEPP Canadian model: 120 V AC, 60 Hz Malaysia, Singapore model 220-230 V AC, 50/60 Hz Other countries: 120/220/240 V AC, 50/60 HzCanadian model: 240 VA Standby mode: 0.5 W Malaysia, Singapore model 175 W Standby mode: 0.5 W Other countries: 160 W Standby mode: 0.5 W 430 x 145 x 298 mm Malaysia, Singapore model 5.5 kg Canadian and other countries: 6 kg (13 lb 4 oz) General The specification measured is under -230 AC 50 Hz condition (Malaysia, Singapore model) Design and specifications are subject to change without notice. -FM wire antenna (1) -AM loop antenna (1) -Remote commander (remote) (1) -Size AA (R6) batteries (2) * You can change the AM tuning interval between 9 kHz and 10 kHz. Turn off the receiver and press ?/1 (power) for more than 4 seconds until INITIAL appears. 1) After tuning in any AM station, turn off the receiver. 2) Hold down PRESET TUNING + button and press the ?/1 (power) button. 9k STEP appears. To change to 10k Step, repeat step 1 and 2 until 10k STEP appears. Note that all preset stations, index names and sound field are cleared after you make the procedure above. Separation Frequency response Selectivity +0.5 -“2 AM tuner section 45 dB at 1 kHz 30 Hz - 15 kHz dB 60 dB at 400 kHz Tuning range Antenna Intermediate frequency Usable sensitivity S/N Harmonic distortion SelectivityMalaysia, Singapore model 531 - 1602 kHz (9 kHz step) Canadian model: 530 - 1710 kHz (10 kHz step)* 531 - 1710 kHz (9 kHz step)* Other countries models: 530 - 1610 kHz (10 kHz step)* 531 - 1602 kHz (9 kHz step)* Loop antenna 450 kHz 50 dB/m (at 999 kHz) 54 dB (at 50 mV/m) 0.5 % (50 mV/m, 400 Hz) At 9 kHz: 35 dB At 10 kHz: 40 dB

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3 STR-DE375 SAFETY-RELATED COMPONENT WARNING!! COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE WITH MARK 0 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, metallized 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 manufacturers 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 limit 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-„¦AC Voltmeter (0.75 V) Earth Ground Fig. A. Using an AC voltmeter to check AC leakage. ATTENTION AU COMPOSANT AYANT RAPPORT Ã- LA SÉCURITÉ! LES COMPOSANTS IDENTIFÉS PAR UNE MARQUE 0 SUR LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE REMPLACER CES COMPOSANTS QUE PAR DES PIÈSES SONY DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU DANS LES SUPPÉMENTS PUBLIÉS PAR SONY. TABLE OF CONTENTS 1. GENERAL ··········································································4 2. TEST MODE ······································································6 3. DIAGRAMS 3-1. Circuit Boards Location·····················································7 3-2. Block Diagram···································································9 3-3. Printed Wiring Board Main Section·······························10 3-4. Schematic Diagram Main Section (1/3)·························11 3-5. Schematic Diagram Main Section (2/3)·························12 3-6. Schematic Diagram Main Section (3/3)·························13 3-7. Printed Wiring Board Panel Section·······························14 3-8. Schematic Diagram Panel Section································15 3-9. Printed Wiring Board Power Section·····························16 3-10. Schematic Diagram Power Section·······························17 3-11. IC Block Diagrams···························································18 3-12. IC Pin Function Description·············································18 4. EXPLODED VIEWS 4-1. Front Panel Section··························································20 4-2. Chassis Section·································································21 5. ELECTRICAL PARTS LIST ·······································22