Sony sava 27 service manual
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Ñ 2 Ñ TABLE OF CONTENTS 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 RAPPORTË 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. TEST MODE ááááááááááááááááááááááááááááááááááááááááááááááááááá\ ááááááááááááááá 3 1. GENERAL ááááááááááááááááááááááááááááááááááááááááááááááááááá\ ááááááááááááááááááá 4 2. DISASSEMBLY 2-1. Removal Amplifier Block áááááááááááááááááááááááááááááááááááááááááááááááááá 5 3. DIAGRAMS 3-1. Circuit Boards Location ááááááááááááááááááááááááááááááááááááááááááááááááááá\ áá 6 3-2. Schematic Diagram ÑMain Section Ñ ááááááááááááááááááááááááááááá 7 3-3. Printed Wiring Board ÑMain Section Ñ áááááááááááááááááááááááá 11 3-4. Schematic Diagram ÑDisplay Section Ñ ááááááááááááááááááááááá 14 3-5. Printed Wiring Board ÑDisplay Section Ñ áááááááááááááááááááá 17 3-6. IC Pin Function ááááááááááááááááááááááááááááááááááááááááááááááááááá\ ááááááááááááá 20 3-7. IC Block Diagrams ááááááááááááááááááááááááááááááááááááááááááááááááááá\ áááááááá 21 4. EXPLODED VIEWS 4-1. System (L) Assy ááááááááááááááááááááááááááááááááááááááááááááááááááá\ áááááááááááá 23 4-2. System (R) Assy ááááááááááááááááááááááááááááááááááááááááááááááááááá\ áááááááááááá 24 4-3. Amplifier Section ááááááááááááááááááááááááááááááááááááááááááááááááááá\ áááááááááá 25 4-4. Rear Speaker Section ááááááááááááááááááááááááááááááááááááááááááááááááááá\ ááááá 26 5. ELECTRICAL PARTS LIST ááááááááááááááááááááááááááááááááááá 27 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 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 1.5k ½ AC voltmeter (0.75V) Earth Ground Fig. A. Using an AC voltmeter to check AC leakage.
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SAVA-27 SECTION 1 GENERALSECTION 2 DISASSEMBLYSECTION 3 DIAGRAMS 3-1. CIRCUIT BOARDS LOCATION Ð 3 Ð Ð 4 ÐÐ 5 Ð 12 3 4 4 5 1 LEFT CHANNEL SPEAKER/CENTER CHANNEL WOOFER 2 CENTER CHANNEL TWEETERS 3 RIGHT CHANNEL SPEAKER/CENTER CHANNEL WOOFER 4 SUPER WOOFER 5 REAR SPEAKER 6 7 !¤ !¢ !£ !¦ !° 8 9 !¼ !¥!» @¼ @Á @ª @£ @¢ @° !Á !ª 6 THEATER 7 PRO LOGIC 8 STADIUM 9 GAME !¼ INPUT1 !Á INPUT2 !ª MUTING !£ MASTER VOL !¢ SUPER WOOFER MODE (1, 2, OFF) !¥ SUR OFF !¤ HALL !¦ POWER !¥ POWER !» STANDBY indicator @¼ ON/READY indicator @Á VOLUME @ª S.WOOFER @£ Remote Sensorg @¢ SURROUND @¥ INPUT2-1. REMOVAL AMPLIFIER BLOCK 1 Grill frame assembly 2 Ornament frame 3 Three tapping screws (4´20) 4 Front frame assembly 5 Four tapping screws (4´20) 7 Display panel assembly !¤ One connector PS Board !¥ Back panel 8 5th tapping screws (4 ´16) 9 8th tapping screws (4´16) !¼ Three tapping screws (4 ´16) !Á 6P connector !ª 5th screws (BVTP 3 ´8) !£ Four screws (BVTP 3 ´8) !¢ Two screws (BVTP 3 ´8) !¦ Amplifier SDN651 6 Flat type wire (27core) Ð 6 Ð This section is extracted from instruction manual. INPUT board MAIN boardPOWER board POW-SW board POW-SR board POW-CN board POW-L board POW-R board DOLBY board PS board T1 board T2 board KEY board DISPLAY board TEST MODE MODE ALL FLUORESCENT INDICATOR TUBES LIGHT When the AC plug is inserted to the power outlet with pressing the MASTER VOL + button, the all fluorescent indicator tubes light. KEY CHECK, LED LIGHTING MODE 1. Pull out the AC plug from the power outlet and turn the power OFF. 2. Connect the lead wire to TP3 on the KEY board. 3. Insert the AC plug to the power outlet and set to STANDBY mode. 4. Let the lead wire connected in step 1 contact to the ground. 5. All fluorescent indicator tubes light, and enter the key check mode. 6. Pressing any buttons, the number of button will be displayed on the fluorescent indicator tube. 7. After all buttons are pressed, it will be in the STANDBY mode. Note: 1. The LED (D505)lights while pressing each button. The LED lights in red when ever number of buttons are pressed, and it lights in green when odd number of buttons are pressed. 2. The LED lights even when the pressed button is pressed again. ¥ Parts Location [KEY BOARD] Ñ Conductor side Ñ CN552 IC503 S506 R557 TP3 Button POWER MASTER VOLÐ MASTER VOL + INPUT SURROUND CTR MODE S.WOOFER Button Number 2 3 4 5 6 7 8 LED Color Red Green Red Green Red Green Red