Table Of Contents - Sony DSR-20MD Service Manual

Section
SERVICE NOTE .................................................................... 4
1. GENERAL
Features ................................................................................ 1-1
Notes on Video Cassettes ..................................................... 1-1
Notes on Recording /Playback .............................................. 1-1
Location and Function of Parts ......................................... 1-2
Playback ............................................................................... 1-4
Connections for Playback ...................................................... 1-4
Settings for Playback ............................................................. 1-4
Playback Procedure .............................................................. 1-4
Playback Functions ............................................................... 1-5
Recording ............................................................................. 1-6
Connections for Recording .................................................... 1-6
Settings for Recording ........................................................... 1-7
Recording Procedure ............................................................ 1-7
Changing Menu Settings .................................................... 1-8
Changing the SET UP MENU Settings ................................. 1-8
Menu Contents ...................................................................... 1-8
Alarm Messages .................................................................. 1-9
Troubleshooting ................................................................... 1-9
Notes on Use ........................................................................ 1-9
2. DISASSEMBLY
2-1. Removal of Upper Case .............................................. 2-1
2-2. Removal of Front Panel Assembly .............................. 2-1
2-3. Removal of VA-102 Board ........................................... 2-1
2-4. Removal of Power Block ............................................. 2-1
2-5. Removal of MD Block Assembly ................................. 2-2
2-6. Removal of CM-56 Board ............................................ 2-2
2-7. Removal of JC-19 Board ............................................. 2-2
2-8. Removal of RP-228 Board .......................................... 2-2
2-9. Circuit Boards Location ............................................... 2-3
3. BLOCK DIAGRAMS
3-1. Overall Block Diagram 1 .............................................. 3-1
3-2. Overall Block Diagram 2 ............................................. 3-3
3-3. Overall Block Diagram 3 ............................................. 3-5
3-4. Overall Block Diagram 4 ............................................. 3-7
3-5. Overall Block Diagram 5 ............................................. 3-9
3-6. Overall Block Diagram 6 ............................................. 3-11
4. PRINTED WIRING BOARDS AND
SCHEMATIC DIAGRAMS
4-1. Frame Schematic Diagrams ....................................... 4-3
• Frame (1/2) Schematic Diagram ............................ 4-3
• Frame (2/2) Schematic Diagram ............................ 4-5
4-2. Printed Wiring Boards and Schematic Diagrams ....... 4-7
• RP-228 Printed Wiring Board ................................ 4-7
• RP-228 Schematic Diagram .................................. 4-11
• JC-19 Printed Wiring Board ................................... 4-15
• JC-19 (AD/DA CONVERTER)
Schematic Diagram ................................................ 4-19
• JC-19 (S1 AFC) Schematic Diagram ..................... 4-23
• JC-19 (U1) Schematic Diagram ............................. 4-27
• JC-19 (D1) Schematic Diagram ............................. 4-31
• JC-19 (C1 SPCON) Schematic Diagram ............... 4-35
• JC-19 (MODE) Schematic Diagram ....................... 4-39
• JC-19 (DV IN/OUT) Schematic Diagram ............... 4-43
• JC-19 (AUDIO CORE) Schematic Diagram .......... 4-47
• JC-19 (DIGITAL AUDIO) Schematic Diagram ....... 4-49
• JC-19 (AUDIO D/A, A/D CONVERTER)
Schematic Diagram ................................................ 4-53
• RE-32 Printed Wiring Board .................................. 4-55
• RE-32 Schematic Diagram .................................... 4-57
• VA-102 Printed Wiring Board ................................. 4-59

TABLE OF CONTENTS

Title Page Section
• VA-102 (IF) Schematic Diagram ............................ 4-63
• VA-102 (VIDEO IN) Schematic Diagram ............... 4-65
• VA-102 (VIDEO OUT) Schematic Diagram ........... 4-69
• VA-102 (UVIC & DV IN/OUT) Schematic Diagram 4-73
• VA-102 (MONITOR OUT) Schematic Diagram ..... 4-75
• VA-102 (AUDIO) Schematic Diagram .................... 4-77
• VA-102 (HI MICOM) Schematic Diagram .............. 4-81
• RS-78 Printed Wiring Board .................................. 4-85
• RS-78, VA-102 (RS MICOM)
Schematic Diagram ................................................ 4-87
• MD-63, MD-64, MD-65, FP-406
Printed Wiring Boards ............................................ 4-89
• MD-63, MD-64, MD-65, FP-406
Schematic Diagram ................................................ 4-91
• HP-100 Printed Wiring Board ................................ 4-93
• HP-100 Schematic Diagram .................................. 4-95
• CM-56 Printed Wiring Board .................................. 4-97
• CM-56 Schematic Diagram .................................... 4-101
• FR-136 Printed Wiring Board ................................. 4-105
• FR-136 Schematic Diagram ................................... 4-107
• HG-1 Printed Wiring Board .................................... 4-109
• HG-1 Schematic Diagram ...................................... 4-109
• U-1 Printed Wiring Board ....................................... 4-111
• U-1 Schematic Diagram ......................................... 4-113
• U-2 Printed Wiring Board ....................................... 4-115
• U-2 Schematic Diagram ......................................... 4-117
4-3. Waveforms .................................................................. 4-119
4-4. Printed Parts Location ................................................. 4-125
5. ADJUSTMENTS
5-1. MECHANICAL SECTION ADJUSTMENTS ................ 5-1
5-1-1. Information ............................................................. 5-1
1-1. How to Search Reference Pages for Removal ........... 5-1
1-2. Phase Adjustment Mark " PH- " .................................. 5-1
5-1-2. Preparation for Mechanical Check,
Adjustment and Maintenance ................................ 5-2
2-1. FL Block Assembly ................................................. 5-2
2-2. Cassette Positions .................................................. 5-2
2-3. Loading/Unloading ................................................. 5-3
2-4. Manual Up/Down the FL Block .............................. 5-3
2-5. Service Jigs List ..................................................... 5-4
5-1-3. Phase Adjustments ................................................ 5-6
3-1. Phase Adjustment
(Loading/Unloading Driving Section) ..................... 5-6
3-2. Phase Adjustment
(S/L Cassette Selection Section) ........................... 5-8
3-3. Phase Adjustment
(Mechanism Chassis Upper Surface Parts) .......... 5-10
5-1-4. Periodic Check and Maintenance .......................... 5-12
4-1. Cleaning of Rotary Drum Assembly ...................... 5-12
4-2. Cleaning of Tape Path System ............................... 5-12
4-3. Periodic Checks ..................................................... 5-13
5-1-5. Mechanism Section Checks and Replacements ... 5-14
5-1. Tape Stopper, Motor FPC Assembly and
Elastic Connector ................................................... 5-14
5-2. Drum Assembly and Drum Base ........................... 5-14
5-3. LM Cover, LM Worm Wheel, LM Holder and
LM Motor Assembly ............................................... 5-15
5-4. TG3/4 Catcher Block Assembly,
Pinch Driving Gear and TC Arm Assembly ........... 5-15
5-5. Pinch Arm Assembly, Pinch Limiter and
Tension Coil Spring (Pinch) ................................... 5-16
5-6. HC Arm, HC Roller Assembly,
Pinch Retainer, Pinch Cam Gear and
TG5/6 Catcher Block Assembly ............................. 5-16
5-7. RL Arm and RL Link ............................................... 5-17
5-8. Gooseneck Guard and Gooseneck Arm Assembly 5-17
5-9. Tension Coil Spring (TG2), Spring Adjustor,
TG2 Spring Hook, TG2 Selection Arm and Damper
Sheet ...................................................................... 5-18
5-10. Tension Coil Spring (TG7), Spring Adjustor and
TG7 Spring Hook ................................................... 5-18
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Title Page