Sony RMT-V256A, Service Manual

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TABLE OF CONTENTS
SERVICE NOTE
1. ERROR CODE INDICATION ··········································· 7
1. GENERAL
Getting Started
Unpacking ··········································································· 1-1
Setting up the remote commander ······································· 1-1
Connecting the VCR ··························································· 1-2
Setting up the VCR with the Auto Set Up function ············ 1-3
Tuning your TV to the VCR ················································ 1-3
Selecting a language ···························································· 1-4
Presetting channels ······························································ 1-4
Changing/disabling programme positions ··························· 1-5
Setting the clock ·································································· 1-7
Setting your personal code ·················································· 1-8
Basic Operations
Playing a tape ······································································ 1-8
Recording TV programmes ················································· 1-9
Recording TV programmes using theVIDEO
Plus+ system ····································································· 1-10
Setting the timer manually ················································ 1-11
Additional Operations
Playing/searching at various speeds ·································· 1-12
Recording TV programmes using Dial Timer ··················· 1-12
Setting the recording duration time ··································· 1-13
Checking/changing/cancelling timer settings ··················· 1-13
Recording stereo and bilingual programmes ····················· 1-14
Searching using the Smart Search function ······················ 1-14
Searching using the index function ··································· 1-15
Adjusting the picture ························································· 1-15
Changing menu options ····················································· 1-16
Editing
Connecting to a VCR or stereo system ····························· 1-17
Basic editing (when recording on this VCR) ···················· 1-17
Audio dubbing ··································································· 1-17
Additional Information
Index to parts and controls ················································ 1-18
2. DISASSEMBLY
2-1. CASE, FRONT PANEL BLOCK ASSEMBLY ·············· 2-1
2-2. FR-152 BOARD, DM-82 BOARD, KK-17 BOARD,
SU-5 BOARD ·································································· 2-1
2-3. REAR PANEL ································································· 2-2
2-4. POWER BLOCK, MA-339 BOARD
(WITH S MECHANISM DECK) ··································· 2-2
2-5. S MECHANISM DECK ················································· 2-3
2-6. INTERNAL VIEWS ························································ 2-4
2-7. CIRCUIT BOARDS LOCATION ··································· 2-5
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. POWER BLOCK DIAGRAM ········································· 3-9
4. PRINTED WIRING BOARDS AND
SCHEMATIC DIAGRAMS
4-1. FRAME SCHEMATIC DIAGRAM ································ 4-3
4-2. PRINTED WIRING BOARDS AND SCHEMATIC
DIAGRAMS ···································································· 4-5
•
MA-339 (VIDEO, AUDIO, SERVO/SYSTEM
CONTROL,TUNER) PRINTED WIRING BOARD ···· 4-5
•
MA-339 (1/7) (REC/PB AMP) SCHEMATIC
DIAGRAM ···································································· 4-7
•
MA-339 (2/7) (VIDEO/NORMAL AUDIO)
SCHEMATIC DIAGRAM ············································ 4-9
•
MA-339 (3/7) (SERVO/SYSTEM CONTROL)
SCHEMATIC DIAGRAM ·········································· 4-11
•
MA-339 (4/7) (AFM AUDIO)
SCHEMATIC DIAGRAM ·········································· 4-13
•
MA-339 (5/7) (TUNER) SCHEMATIC
DIAGRAM ·································································· 4-15
•
MA-339 (6/7) (INPUT/OUTPUT)
SCHEMATIC DIAGRAM ·········································· 4-17
•
MA-339 (7/7) (POWER SUPPLY)
SCHEMATIC DIAGRAM ·········································· 4-19
•
FR-152 (MODE CONTROL)/ KK-17 (TIMER)/ DM-82
(OPERATION SWITCHES)/SU-5 (SURROUND)
PRINTED WIRING BOARDS ··································· 4-21
•
FR-152 (MODE CONTROL)/ KK-17 (TIMER)/ DM-82
(OPERATION SWITCHES)/SU-5 (SURROUND)
SCHEMATIC DIAGRAM ·········································· 4-23
•
POWER BLOCK SRV878EK (SWITCHING
REGURATOR) PRINTED WIRING BOARD ··········· 4-25
•
POWER BLOCK SRV878EK (SWITCHING
REGURATOR) SCHEMATIC DIAGRAM ················ 4-27
•
SE-77 (SECAM VIDEO SIGNAL PROCESSOR)
SCHEMATIC DIAGRAM ·········································· 4-29
•
SE-77 (SECAM VIDEO SIGNAL PROCESSOR)
PRINTED WIRING BOARD ····································· 4-31
5. INTERFACE, IC PIN FUNCTION
DESCRIPTION
5-1. SYSTEM CONTROL — VIDEO/RP BLOCK
INTERFACE (MA-339 BOARD IC162) ························ 5-1
5-2. SYSTEM CONTROL — SERVO PERIPHERAL
CIRCUIT INTERFACE (MA-339 BOARD IC162) ······· 5-1
5-3. SYSTEM CONTROL — MECHANISM BLOCK
INTERFACE (MA-339 BOARD IC162) ························ 5-2
5-4. SYSTEM CONTROL — SYSTEM CONTROL
PERIPHERAL CIRCUIT INTERFACE
(MA-339 BOARD IC162) ··············································· 5-2
5-5. SYSTEM CONTROL — AUDIO BLOCK INTERFACE
(MA-339 BOARD IC162) ··············································· 5-2
5-6. SERVO/SYSTEM CONTROL MICROPROCESSOR
PIN FUNCTIONS (MA-339 BOARD IC162) ················ 5-3
5-7. MODE CONTROL PIN FUNCTIONS
(FR-152 BOARD IC420) ················································ 5-5
6. ADJUSTMENTS
6-1 MECHANICAL ADJUSTMENTS ································· 6-1
6-2. ELECTRICAL ADJUSTMENTS ··································· 6-1
2-1. PREPARATION BEFORE ADJUSTMENT ··················· 6-1
2-1-1. Equipment Required ························································ 6-1
2-1-2. Equipment Connection ···················································· 6-1
2-1-3. Set-up of Adjustment ······················································· 6-1
2-1-4. Alignment Tape ······························································· 6-1
2-1-5. Input/Output Levels and Impedance ······························· 6-2
2-1-6. Adjustment Sequence ······················································ 6-2
2-2.
POWER SUPPLY CHECK ············································· 6-2
2-2-1. Output Voltage Check (MA-339 Board) ························· 6-2
2-3.
SERVO SYSTEM CHECK ············································· 6-3
2-3-1. RF Switching Position Adjustment
(MA-339 Board) ······························································ 6-3
2-4. AUDIO SYSTEM ADJUSTMENT ································· 6-3
2-4-1. Hi-Fi Audio System Adjustment ····································· 6-3
2-4-2. Hi-Fi Switching Position Adjustment
(MA-339 Board) ······························································ 6-4
2-4-3. Normal Audio System Adjustment ·································· 6-4
2-4-4. ACE Head Adjustment ···················································· 6-4
2-4-5. E-E Output Level Check ················································· 6-4
2-4-6. Frequency Response Check ············································· 6-4
2-5.
ADJUSTING PARTS LOCATION DIAGRAM ············· 6-6
7. REPAIR PARTS LIST
7-1 EXPLODED VIEWS ······················································ 7-1
7-1-1. FRONT PANEL AND UPPER CASE SECTION ·········· 7-1
7-1-2. CHASSIS SECTION ······················································· 7-3
7-1-3. MECHANISM DECK SECTION-1 ······························· 7-4
7-1-4. MECHANISM DECK SECTION-2 ······························· 7-5
7-1-5. MECHANISM DECK SECTION-3 ······························· 7-6
7-2.
ELECTRICAL PARTS LIST ·········································· 7-7