Sony str ksl 7 service manual
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2 STR-KSL7/SL7/TA-KSL7 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 kΩAC Voltmeter (0.75 V) Earth Ground Fig. A. Using an AC voltmeter to check AC leakage. AM tuner section Tuning range With 10-kHz tuning scale: 530 – 1710 kHz With 9-kHz tuning scale: 531 – 1710 kHz With 10-kHz tuning scale: 530 – 1610 kHz With 9-kHz tuning scale: 531 – 1602 kHz 530 – 1610 kHz 531 – 1602 kHz AntennaLoop antenna Intermediate frequency 450 kHz Usable sensitivity50 dB/m (at 1,000 kHz or 999 kHz) S/N54 dB (at 50 mV/m) Harmonic distortion0.5% (50 mV/m, 400 Hz) SelectivityAt 9 kHz: 35 dB At 10 kHz: 40 dB 4) You can change the AM tuning scale to 9 kHz 10 kHz. After tuning in any AM station, turn off the receiver. Hold down the + button and press the button. All preset stations will be erased when you change the tuning scale. To reset the scale to 10 kHz (or 9 kHz), repeat the procedure. General Power requirements 120 V AC, 60 Hz 110 – 120 V AC, 50/60 Hz 220 – 230 V AC, 50/60 Hz 230 V AC, 50/60 Hz Power consumption98 W Power consumption (during standby mode) 1.7 W 1.9 W Dimensions (w/h/d)430 × 83 × 289 mm including projecting parts and controls Mass (Approx.)3.1 kg US, Canadian models E model Mexican model Malaysia, Singapore models STR-SL7 : US, STR-KSL7, Canadian, Mexican models STR-SL7 : US, STR-KSL7, Canadian, Mexican models TA-KSL7 : AEP, UK, Chinese models STR-KSL7 : E model STR-KSL7 : Malaysia, Singapore models STR-KSL7 : Malaysia, Singapore models STR-SL7 : US model Supplied accessories FM wire antenna (1) AM loop antenna (1) Remote commander RM-U305S (1) R6 (size-AA) batteries (2) Design and specifications are subject to change without notice. EXCEPT TA-KSL7
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3 STR-KSL7/SL7/TA-KSL7 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. ATTENTION AU COMPOSANT AYANT RAPPORT À 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. MODEL IDENTIFICATION - BACK PANEL - PARTS No. 4-235-042-1s 4-235-042-2s 4-235-042-3s 4-235-042-4s 4-235-042-5s 4-235-042-7s 4-235-042-9s MODEL STR-SL7 :US model STR-KSL7 :Canadian model STR-KSL7 :Malaysia, Singapore model STR-KSL7 :E model STR-KSL7 :Mexican model TA-KSL7 :AEP, UK model TA-KSL7 :Chinese model 1. GENERAL ·········································································· 4 2. TEST MODE ······································································ 5 3. DIAGRAMS ········································································ 7 3-1. Block Diagrams ····························································· 8 – Main Section – ··························································· 8 – Display/Power Section – ············································ 9 3-2. Printed Wiring Board – Digital Section – ·················· 10 3-3. Schematic Diagram – Digital Section (1/2) – ············ 11 3-4. Schematic Diagram – Digital Section (2/2) – ············ 12 3-5. Printed Wiring Board – Main Section (1/2) – ············ 13 3-6. Printed Wiring Board – Main Section (2/2) – ············ 14 3-7. Schematic Diagram – Main Section (1/3) – ··············· 15 3-8. Schematic Diagram – Main Section (2/3) – ··············· 16 3-9. Schematic Diagram – Main Section (3/3) – ··············· 17 3-10. Printed Wiring Board – Panel Section – ····················· 18 3-11. Schematic Diagram – Panel Section – ······················· 19 3-12. Schematic Diagram – Video Section – ······················· 20 3-13. Printed Wiring Board – Video Section – ···················· 21 3-14. IC Block Diagrams ······················································ 22 3-15. IC Pin Function Descriptions ······································ 25 4. EXPLODED VIEWS ······················································ 29 4-1. Front Panel Section ····················································· 29 4-2. Chassis Section ···························································· 30 5. ELECTRICAL PARTS LIST ······································· 31 Parts No. TABLE OF CONTENTS Unleaded solder Boards requiring use of unleaded solder are printed with the lead- free mark (LF) indicating the solder contains no lead. (Caution: Some printed circuit boards may not come printed with the lead free mark due to their particular size.) : LEAD FREE MARK Unleaded solder has the following characteristics. -Unleaded solder melts at a temperature about 40°C higher than ordinary solder. Ordinary soldering irons can be used but the iron tip has to be applied to the solder joint for a slightly longer time. Soldering irons using a temperature regulator should be set to about 350°C. Caution: The printed pattern (copper foil) may peel away if the heated tip is applied for too long, so be careful! -Strong viscosity Unleaded solder is more viscous (sticky, less prone to flow) than ordinary solder so use caution not to let solder bridges occur such as on IC pins, etc. -Usable with ordinary solder It is best to use only unleaded solder but unleaded solder may also be added to ordinary solder. Notes on chip component replacement -Never reuse a disconnected chip component. -Notice that the minus side of a tantalum capacitor may be damaged by heat.