Sony str de 225 rec service manual

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Ñ 2 Ñ 1. GENERALááááááááááááááááááááááááááááááááááááááááááááááááááá\ áááááááááááá 3 2. TEST MODEááááááááááááááááááááááááááááááááááááááááááááááááááá\ ááááááááá 4 3. DIAGRAMS 3-1. Circuit Boards Location ááááááááááááááááááááááááááááááááááááááááááááááááááá\ áá 5 3-2. Block Diagram ááááááááááááááááááááááááááááááááááááááááááááááááááá\ áááááááááááááááá 7 3-3. Schematic Diagram Ñ Display Section Ñ áááááááááááááááááááááááá 9 3-4. Printed Wiring Boards Ñ Display Section Ñ áááááááááááááááááá 11 3-5. Schematic Diagram Ñ Power Section Ñ áááááááááááááááááááááááá 13 3-6. Printed Wiring Boards Ñ Power Section Ñ áááááááááááááááááááá 15 3-7. Printed Wiring Boards Ñ Main Section Ñ áááááááááááááááááááááá 17 3-8. Schematic Diagram Ñ Main Section (1/3) Ñ ááááááááááááááááá 19 3-9. Schematic Diagram Ñ Main Section (2/3) Ñ ááááááááááááááááá 21 3-10. Schematic Diagram Ñ Main Section (3/3) Ñ ááááááááááááááááá 23 3-11. IC Pin Function Description ááááááááááááááááááááááááááááááááááááááááááááá 25 3-12. IC Block Diagrams ááááááááááááááááááááááááááááááááááááááááááááááááááá\ áááááááá 27 4. EXPLODED VIEWS 4-1. Front Panel Section ááááááááááááááááááááááááááááááááááááááááááááááááááá\ ááááááá 29 4-2. Chassis Section ááááááááááááááááááááááááááááááááááááááááááááááááááá\ áááááááááááááá 30 5. ELECTRICAL PARTS LISTáááááááááááááááááááááááááááááááá 31 TABLE OF CONTENTS 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 microampers). 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 suitab le. 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. 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. 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. General System Tuner section; PLL quartz-locked digital synthesizer system Preamplifier section: Low-noise NF type epualizer Power amplifier section: Pure-complimentary SEPP Pow er 230 V AC, 50/60 Hz requirements Pow er STR-DE325: 195 W consumption STR-DE225: 110 W AC outlets Switched 100 W (except for the U.K. model) Dimensions 430 ´ 145 ´ 295 mm Mass(Approx.) STR-DE325: 7.4 kg STR-DE225: 6.1 kg Supplied FM wire aerial (1) accessories AM loop aerial (1) Remote controller (remote) (1) Size AA (R6) batteries (2) Scart adaptor (1) Design and specifications are subject to chang e without notice. Specifications indicated are measured at 230 VAC, 50 Hz

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Ñ 3 Ñ SECTION 1 GENERAL 12 3 5 4 6 7 8 9 !¼ !Á !ª !£ !¢ !° !¤ !¦ !¥ !» @ª @¼ @Á #Á @» #¼ @¢ @¥ @° @¦ @¤ @£ #ª 12 3 4 5 6 7 8 9 !¼ !Á !ª LOCATION AND FUNCTION OF CONTROLS [FRONT PANEL] [REAR PANEL] 1 POWER switch (I/u) 2 CENTER LEVEL +, Ð buttons 3 REAR LEVEL +, Ð buttons 4 PRO LOGIC, C.STUDIO, HALL indicators 5 BASS BOOST indicator 6 MASTER VOLUME control 7 BALANCE control 8 TREBLE control 9 BASS control !¼ MUTING button/indicator !Á SURROUND ON/OFF button !ª BASS BOOST button !£ SURROUND EFFECT/DELAY, MODE buttons !¢ SET UP button !° TAPE/MD FUNCTION button !¤ TUNER FUNCTION button!¦ CD FUNCTION button !¥ VIDEO FUNCTION button !» TV/LD FUNCTION button @¼ Numeric buttons @Á SHIFT button @ª DIRECT TUNING button @£ CHARACTER, DISPLAY buttons @¢ MEMORY button @° FM/AM button @¤ PRESET/CHARACTER +, Ð buttons @¦ FM MODE button @¥ SLEEP button @» TUNING/PTY SELECT +, Ð buttons #¼ RDS PTY, EON buttons #Á PHONES jack #ª SPEAKERS A, B ON/OFF buttons 1 ANTENNA (FM/AM) 2 y SIGNAL GND 3 MIX AUDIO OUT 4 AC OUTLET 5 AC power cord 6 FRONT SPEAKERS (A/B)7 SURROUND SPEAKERS (CENTER) 8 SURROUND SPEAKERS (REAR) 9 VIDEO AUDIO IN, AUDIO OUT 0 TV/LD AUDIO IN !Á TAPE/MD IN, REC OUT !ª CD IN Photo : STR-DE225 Photo : STR-DE225