Sony SLV-M20HF - Video Cassette Recorder, Service Manual

Page: 3 / 143

— 3 —
SERVICE NOTE
1. ERROR CODE INDICATION ··········································· 5
1. GENERAL
Basic Operations
Playing a tape ········································································· 1-1
Recording TV programs ························································ 1-1
Locating a channel using the channel list ······························ 1-2
Recording TV programs using VCR Plus+ ··························· 1-3
Setting the timer manually ····················································· 1-3
Additional Operations
Playing/searching at various speeds ······································ 1-4
Searching for a selected point on the tape ····························· 1-5
Skip-searching automatically ················································· 1-5
Creating a favorite channel list ·············································· 1-6
Recording TV programs using the quick timer ····················· 1-6
Checking/changing/cancelling the manual timer settings ····· 1-6
Recording stereo and bilingual programs ······························ 1-7
Searching using the index function ········································ 1-8
Adjusting the picture ····························································· 1-8
Changing menu options ························································· 1-8
Editing with another VCR ····················································· 1-9
SmartFile function
About the SmartFile function ················································ 1-9
Recording using the SmartFile function ······························ 1-10
Selecting and playing a program ········································· 1-11
Checking the contents of a tape ··········································· 1-11
Labelling a recorded program and tape ······························· 1-11
Protecting a recorded program ············································· 1-13
Erasing the data of an unwanted program ··························· 1-13
Storing program data from the DSS receiver
(Program Data Download) ··················································· 1-13
GUIDE Plus+ system
About the GUIDE Plus+ system ·········································· 1-14
Overview of the GUIDE Plus+ menu ·································· 1-15
Using the Grid menu ···························································· 1-15
Using the Sort menu ···························································· 1-16
Using the Schedule menu ···················································· 1-17
Using the Editor menu ························································· 1-18
Using the Demo menu ························································· 1-19
Additional Information
Troubleshooting ··································································· 1-19
Index to parts and controls ··················································· 1-20
2. DISASSEMBLY
2-1. UPPER CASE,
FRONT PANEL BLOCK ASSEMBLY ·························· 2-1
2-2. FR-139, DM-81, AJ-2, AN-17 BOARDS ······················· 2-1
2-3. MG-21 BOARD, REAR PANEL ···································· 2-1
2-4. POWER BLOCK, MA-335 BOARD
(WITH S MECHANISM DECK) ··································· 2-2
2-5. AN-16 BOARD, S MECHANISM DECK ····················· 2-2
2-6. INTERNAL VIEWS ························································ 2-3
2-7. CIRCUIT BOARDS LOCATION ··································· 2-4
3. BLOCK DIAGRAMS
3-1. OVERALL BLOCK DIAGRAM ···································· 3-1
3-2. VIDEO BLOCK DIAGRAM ·········································· 3-3
3-3. SERVO/SYSTEM CONTROL BLOCK DIAGRAM ····· 3-5
3-4. AUDIO BLOCK DIAGRAM ·········································· 3-7
3-5. MODE CONTROL BLOCK DIAGRAM ······················· 3-9
3-6. TUNER BLOCK DIAGRAM ······································· 3-11
3-7. POWER SUPPLY BLOCK DIAGRAM ······················· 3-13
4. PRINTED WIRING BOARDS AND
SCHEMATIC DIAGRAMS
4-1. FRAME SCHEMATIC DIAGRAM ································ 4-1
4-2. PRINTED WIRING BOARDS AND
SCHEMATIC DIAGRAMS ············································ 4-3
• MA-335 (REC/PB AMP, VIDEO, SERVO/SYSTEM
CONTROL, AUDIO, TUNER)
PRINTED WIRING BOARD ························· 4-3
• MA-335 (REC/PB AMP) SCHEMATIC DIAGRAM ·· 4-5
• MA-335 (VIDEO, NORMAL AUDIO)
SCHEMATIC DIAGRAM ······························ 4-8
• MA-335 (SERVO/SYSTEM CONTROL)
SCHEMATIC DIAGRAM ···························· 4-11
• MA-335 (ON SCREEN DISPLAY)
SCHEMATIC DIAGRAM ···························· 4-15
• MA-335 (DSF) SCHEMATIC DIAGRAM ················ 4-17
• MA-335 (AFM AUDIO)
SCHEMATIC DIAGRAM ···························· 4-19
• MA-335 (TUNER) SCHEMATIC DIAGRAM ·········· 4-21
• MA-335 (POWER SUPPLY)
SCHEMATIC DIAGRAM ···························· 4-23
• MA-335 (AV-BUS) SCHEMATIC DIAGRAM ········· 4-25
• FR-139 (MODE CONTROL)
PRINTED WIRING BOARD ······················· 4-27
• FR-139 (MODE CONTROL)
SCHEMATIC DIAGRAM ···························· 4-29
• DM-81 (OPERATION SWITCHES)
PRINTED WIRING BOARD AND
SCHEMATIC DIAGRAM ···························· 4-31
• AJ-2 (LINE-2 IN)
PRINTED WIRING BOARD AND
SCHEMATIC DIAGRAM ···························· 4-32
• AN-16 (INNER SMART FILE SENSOR/WRITER),
AN-17 (FRONT SMART FILE SENSOR)
PRINTED WIRING BOARDS AND
SCHEMATIC DIAGRAMS ·························· 4-33
• MG-21 (CONDUCTOR SIDE) (SMART FILE)
PRINTED WIRING BOARD ······················· 4-35
• MG-21 (COMPONENT SIDE) (SMART FILE)
PRINTED WIRING BOARD ······················· 4-37
• MG-21 (SMART FILE)
SCHEMATIC DIAGRAM ···························· 4-39
• MG-21 (GUIDE PLUS) (SMART FILE)
SCHEMATIC DIAGRAM ···························· 4-41
• MG-21 (VIDEO ENCODER) (SMART FILE)
SCHEMATIC DIAGRAM ···························· 4-43
• POWER BLOCK SR821 (SWITCHING REGULATOR)
PRINTED WIRING BOARD AND
SCHEMATIC DIAGRAM ···························· 4-45
5. INTERFACE, IC PIN FUNCTION
DESCRIPTION
5-1. SYSTEM CONTROL —
VIDEO BLOCK INTERFACE
(MA-335 BOARD IC161) ··············································· 5-1
5-2. SYSTEM CONTROL —
SERVO PERIPHERAL CIRCUIT INTERFACE
(MA-335 BOARD IC161) ··············································· 5-1
5-3. SYSTEM CONTROL —
MECHANISM INTERFACE
(MA-335 BOARD IC161) ··············································· 5-2
5-4. SYSTEM CONTROL —
SYSTEM CONTROL PERIPHERAL
CIRCUIT INTERFACE (MA-335 BOARD IC161) ······· 5-2
5-5. SYSTEM CONTROL —
AUDIO BLOCK INTERFACE
(MA-335 BOARD IC161) ··············································· 5-2
5-6. SERVO/SYSTEM CONTROL MICROPROCESSOR
PIN FUNCTIONS (MA-335 BOARD IC161) ················ 5-3
5-7. TUNER/TIMER MODE CONTROL PIN FUNCTIONS
(FR-139 BOARD IC460) ················································ 5-4
TABLE OF CONTENTS