Sony dvpns 905 v service manual

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-“ 2 -“ WARNING!! WHEN SERVICING, DO NOT APPROACH THE LASER EXIT WITH THE EYE TOO CLOSELY. IN CASE IT IS NECESSARY TO CONFIRM LASER BEAM EMISSION, BE SURE TO OBSERVE FROM A DISTANCE OF MORE THAN 25 cm FROM THE SURFACE OF THE OBJECTIVE LENS ON THE OPTICAL PICK-UP BLOCK. CAUTION: The use of optical instrument with this product will increase eye hazard. CAUTION Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous ra- diation exposure. ATTENTION AU COMPOSANT AYANT RAPPORT Ã- LA SÉCURITÉ! LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE 0 SUR LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE REMPLACER CES COM- POSANTS QUE PAR DES PIÈCES SONY DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY. 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 PUB- LISHED BY SONY. Fig. A. Using an AC voltmeter to check AC leakage. 1.5 k -„¦ 0.15 µF AC voltmeter (0.75 V) To Exposed Metal Parts on Set Earth Ground LEAKAGE TEST 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 indica- tion is 0.75V, so analog meters must have an accurate low- voltage scale. The Simpson 250 and Sanwa SH-63Trd are ex- amples of a passive VOM that is suitable. Nearly all battery operated digital multimeters that have a 2V AC range are suit- able. (See Fig. A) 1. Check the area of your repair for unsoldered or poorly-sol- dered connections. Check the entire board surface for solder splashes and bridges. 2.Check the interboard wiring to ensure that no wires are pinched or contact high-wattage resistors. 3. Look for unauthorized replacement parts, particularly transis- tors, that were installed during a previous repair. Point them out to the customer and recommend their replacement. 4. Look for parts which, though functioning, show obvious signs of deterioration. Point them out to the customer and recom- mend their replacement. 5. Check the line cord for cracks and abrasion. Recommend the replacement of any such line cord to the customer. 6. Check the B+ voltage to see it is at the values specified. 7. Check the antenna terminals, metal trim, metallized knobs, screws, and all other exposed metal parts for AC leakage. Check leakage as described below. SAFETY CHECK-OUT After correcting the original service problem, perform the following safety checks before releasing the set to the customer: 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.

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-“ 3 -“ T ABLE OF CONTENTS Section Title Page Section Title Page Service Note ........................................................................\ .... 4 1. GENERAL Precautions................................................................... 1-1 Simple Start Guide........................................................ 1-3 Hookups ........................................................................\ 1-4 Playing Discs ................................................................. 1-8 Searching for a Scene................................................... 1-11 Viewing Information About the Disc.............................. 1-12 Sound Adjustments ....................................................... 1-13 Enjoying Mo vies............................................................ 1-14 Using Various Additional Functions ..............................1-16 Settings and Adjustments ............................................. 1-18 Additional Infor mation................................................... 1-20 2. DISASSEMBLY 2-1. Case Removal............................................................... 2-1 2-2. Tray Cover Assy Removal ............................................ 2-1 2-3. Front Panel Block Assy Removal ................................. 2-1 2-4. Power Block Removal ................................................... 2-1 2-5. Mechanism Deck Removal ........................................... 2-2 2-6. AV-64 Board Removal ................................................... 2-2 2-7. MB-105 Board Removal ................................................ 2-2 2-8. ER-19 Board Removal .................................................. 2-2 2-9. IF-94 Board Removal .................................................... 2-3 2-10. Optical Pick-up Remo val............................................... 2-3 2-11. Internal Vie ws ................................................................ 2-4 2-12. Circuit Boards Location................................................. 2-5 3. BLOCK DIAGRAMS 3-1. Overall Block Diagram................................................... 3-1 3-2. RF/Servo Block Diagram............................................... 3-3 3-3. Signal Processor Block Diagram.................................. 3-5 3-4. System Control Block Diagram..................................... 3-7 3-5. Video (1) Block Diagram ............................................... 3-9 3-6. Video (2) Block Diagram ...............................................3-11 3-7. Audio (1) Block Diagram ...............................................3-13 3-8. Audio (2) Block Diagram ...............................................3-15 3-9. Interface Control Block Diagram ...................................3-17 3-10. Power (1) Bloc k Diagram.............................................. 3-19 3-11. Power (2) Bloc k Diagram.............................................. 3-21 4. PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS 4-1. Frame Schematic Diag ram ............................................ 4-3 4-2. Printed Wiring Boards and Schematic Diagrams......... 4-5 MS-81 (LOADING) Printed Wiring Board and Schematic Diagra m................................................ 4-5 MB-105 Printed Wir ing Board....................................... 4-7 MB-105 (RF AMP, SERVO) Schematic Diagram.......... 4-11 MB-105 (ARP, SERVO DSP) Schematic Diagram........ 4-13 MB-105 (AV DECODER) Schematic Diagram.............. 4-15 MB-105 (MOTOR DRIVE) Schematic Diagram............4-17 MB-105 (SYSTEM CONTROL) Schematic Diagra m....................................................... 4-19 MB-105 (CLOCK GENERATOR) Schematic Diagra m....................................................... 4-21 MB-105 (I/P CONVERTOR) Schematic Diagram.........4-23 MB-105 (VIDEO ENCODER, AUDIO D/A CONVERTER) Schematic Diag ram .............................. 4-25 MB-105 (AUDIO DSP) Schematic Diagram.................. 4-27 MB-105 (2ch/6ch DAC) Schematic Diagram................ 4-29 MB-105 (SACD DECODER) Schematic Diagram........4-31 LE-34 (LED) Printed Wiring Board and Schematic Diagra m................................................ 4-33 AV -64 Printed Wir ing Board.......................................... 4-35 AV -64 (VIDEO BUFFER) Schematic Diagram.............. 4-39 AV -64 (AUDIO AMP) Schematic Diagram.................... 4-41 AV -64 (5.1CH AUDIO AMP) Schematic Diagram.........4-43 IF-94 Printed Wir ing Board........................................... 4-45 IF-94 (IF CON) Schematic Diag ram ............................. 4-49 ER-19 Printed Wir ing Board.......................................... 4-51 ER-19 (EURO AV) Schematic Diagram........................ 4-53 ETXNY393N2F Printed Wir ing Board........................... 4-55 ETXNY393N2F (SWITCHING REGULATOR) Schematic Diagra m....................................................... 4-57 HS12S1U Printed Wir ing Board.................................... 4-59 HS12S1U Schematic Diagra m...................................... 4-61 HS12S1F Printed Wir ing Board.................................... 4-63 HS12S1F Schematic Diagra m...................................... 4-65 5. IC PIN FUNCTION DESCRIPTION 5-1. System Control Pin Function (MB-105 Board IC104) .................................................. 5-1 6.TEST MODE 6-1. General Descr iption...................................................... 6-1 6-2. Starting T est Mode........................................................ 6-1 6-3. Syscon Diagnosis .......................................................... 6-1 6-4. Drive Auto Adjustment .................................................. 6-6 6-5. Drive Manual Operation ................................................ 6-8 6-6. Mecha Aging ................................................................. 6-11 6-7. Emergency History ........................................................ 6-11 6-8. Version Information ....................................................... 6-12 6-9. Video Level Adjustment ................................................6-12 6-10. IF CON Self Diagnostic Function .................................. 6-12 6-11. Troub leshooting............................................................. 6-19 7. ELECTRICAL ADJUSTMENT 7-1. Power Supply Check..................................................... 7-1 1. ETXNY393N2F/HS12S1U/HS12S1F ...........................7-1 7-2. Adjustment of Video System......................................... 7-2 1. Video Lev el Adjustment................................................ 7-2 2. Progressive Video Output Level Adjustment ................7-2 3. Checking S Video Output S-Y....................................... 7-2 4. Checking S Video Output S-C....................................... 7-2 5. Checking Component Video Output Y.......................... 7-3 6. Checking Component Video Output B-Y...................... 7-3 7. Checking Component Video Output R-Y...................... 7-3 7-3. Adjustment Related Parts Arrangement ....................... 7-6 8. REPAIR PARTS LIST 8-1. Exploded Views ............................................................. 8-1 8-1-1. Front Panel Assembly (NS705V/NS755V) ..............8-1 8-1-2. Front Panel Assembly (NS905V/NS915V) ..............8-2 8-1-3. Chassis Assembly (NS705V/NS755V)....................8-3 8-1-4. Chassis Assembly (NS905V/NS915V)....................8-4 8-1-5. Mechanism Deck Assembly..................................... 8-5 8-2. Electrical Parts List ....................................................... 8-6