Sony dvps 320 service manual

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Ð 2 Ð 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. 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. CAUTION Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous ra- diation exposure. SAFETY CHECK-OUT 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 ÒpinchedÓ 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.After correcting the original service problem, perform the following safety checks before releasing the set to the customer: 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 B+ voltage to see it is at the values specified.

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Ð 3 Ð TABLE OF CONTENTS Section Title Page Section Title Page Service Note ............................................................................ 4 1. GENERAL This Player Can Play the Following Discs .................... 1-1 Getting Started .............................................................. 1-1 Playing Discs ................................................................. 1-3 Using Various Functions with the Control Menu ........... 1-5 Settings and Adjustments ............................................. 1-9 Index to Par ts and Controls .......................................... 1-13 2. DISASSEMBLY 2-1. Case Removal ............................................................... 2-1 2-2. MB-82 Board Removal .................................................. 2-1 2-3. Power Block Removal ................................................... 2-1 2-4. AU-208 Board Removal ................................................ 2-1 2-5. Tray Cover Removal ...................................................... 2-2 2-6. Front Panel Removal ..................................................... 2-2 2-7. Mechanism Deck Removal ............................................ 2-2 2-8. Tray Removal ................................................................. 2-2 2-9. Optical Pick-up Removal ............................................... 2-3 2-10. Belt, Loading Motor (M001), MS-46, TK-51 Board Removal ...................................... 2-3 2-11. Internal View .................................................................. 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 Process/Video Block Diagram........................... 3-5 3-4. System Control Block Diagram ..................................... 3-7 3-5. Audio Block Diagram ..................................................... 3-9 3-6. Interface Control Block Diagram ................................... 3-11 3-7. Power Block Diagram .................................................... 3-13 4. PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS 4-1. Frame Schematic Diagram........................................... 4-3 4-2. Printed Wiring Boards and Schematic Diagrams ......... 4-7 TK-51 Printed Wiring Board .......................................... 4-7 TK-51 Schematic Diagram ............................................ 4-11 MS-46 Printed Wiring Board and Schematic Diagram ....................................................... 4-13 MB-82 Printed Wiring Board ......................................... 4-15 MB-82 (AV DECODER) Schematic Diagram ................ 4-19 MB-82 (SDRAM) Schematic Diagram .......................... 4-21 MB-82 (SERVO DSP) Schematic Diagram ................... 4-23 MB-82 (DRIVE) Schematic Diagram ............................ 4-25 MB-82 (ARP) Schematic Diagram ................................ 4-27 MB-82 (SYSTEM CONTROL) Schematic Diagram ....................................................... 4-29 MB-82 (HGA) Schematic Diagram ................................ 4-31 MB-82 (CLOCK GENERATOR) Schematic Diagram ....................................................... 4-33 MB-82 (DAC) Schematic Diagram ................................ 4-35 MB-82 (BIAS) Schematic Diagram ............................... 4-37 AU-208 Printed Wiring Board ........................................ 4-39 AU-208 Schematic Diagram .......................................... 4-41 FL-97 Printed Wiring Board .......................................... 4-43 FL-97 (FUNCTION SWITCH) Schematic Diagram ....................................................... 4-45 FL-97 (IF CON) Schematic Diagram ............................ 4-47 FR-146 Printed Wiring Board and Schematic Diagram ....................................................... 4-49 HS-030SH Printed Wiring Board .................................. 4-51 HS-030SH Schematic Diagram .................................... 4-53 5. IC PIN FUNCTION DESCRIPTION 5-1. System Control Pin Function (MB-82 Board IC202) .................................................... 5-1 6. TEST MODE 6-1. General Description ...................................................... 6-1 6-2. Starting Test Mode ........................................................ 6-1 6-3. Syscon Diagnosis .......................................................... 6-1 6-4. Drive Auto Adjustment .................................................. 6-5 6-5. Drive Manual Operation ................................................ 6-7 6-6. Mecha Aging ................................................................. 6-9 6-7. Emergency History ........................................................ 6-9 6-8. Version Information ....................................................... 6-10 6-9. Video Level Adjustment ................................................ 6-10 7. ELECTRICAL ADJUSTMENTS 7-1. Power Supply Adjustment ............................................. 7-1 1. Power Supply Check (HS-030SH Board) ........................................................ 7-1 7-2. Adjustment of Video System ......................................... 7-2 1. Video Level Adjustment (MB-82 Board) ....................... 7-2 2. S-terminal Output Check (MB-82 Board) ...................... 7-2 3. Checking S Video Output S-C (MB-82 Board) ............. 7-2 7-3. Adjustment Related Parts Arrangement....................... 7-4 8. REPAIR PARTS LIST 8-1. Exploded Views ............................................................. 8-1 8-1-1. Case Assembly ........................................................ 8-1 8-1-2. Front Panel Assembly .............................................. 8-2 8-1-3. Chassis Assembly .................................................... 8-3 8-1-4. Mechanism Deck Assembly ..................................... 8-4 8-2. Electrical Parts List ....................................................... 8-5