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TABLE OF CONTENTS
SERVICE NOTE
1.
HOW TO RETURN THE PINCH ROLLER,
GUIDE ROLLER AND ELEVATOR CAM TO
STOP MODE ………………………………………5
GUIDE ROLLER AND ELEVATOR CAM TO
STOP MODE ………………………………………5
2.
HOW TO RETURN A TAPE INTO
CASSETTE HALF …………………………………5
CASSETTE HALF …………………………………5
3.
HOW TO REMOVE A CASSETTE FROM
A MACHINE IF A CASSETTE IS LEFT IN
A MACHINE IN TROUBLE ………………………5
A MACHINE IF A CASSETTE IS LEFT IN
A MACHINE IN TROUBLE ………………………5
4.
HOW TO REMOVE DRUM ASSEMBLY …………5
1.
GENERAL
Getting Started
Unpacking …………………………………………………1-1
Setting up the remote commander …………………………1-1
Connecting the VCR ………………………………………1-2
Tuning the VCR to your TV ………………………………1-2
Setting the clock ……………………………………………1-3
Tuning the VCR ……………………………………………1-4
Playing a tape ………………………………………………1-7
Recording TV programmes
Setting up the remote commander …………………………1-1
Connecting the VCR ………………………………………1-2
Tuning the VCR to your TV ………………………………1-2
Setting the clock ……………………………………………1-3
Tuning the VCR ……………………………………………1-4
Playing a tape ………………………………………………1-7
Recording TV programmes
………………………………1-8
Recording TV programmes using the timer ………………1-10
Additional Operations
Playing/searching at various speeds ………………………1-11
Recording TV programmes using the Quick timer ………1-12
Checking/changing/cancelling timer setting ………………1-13
Adjusting the picture ………………………………………1-13
Editing with another VCR …………………………………1-14
Index to parts and controls …………………………………1-15
Recording TV programmes using the Quick timer ………1-12
Checking/changing/cancelling timer setting ………………1-13
Adjusting the picture ………………………………………1-13
Editing with another VCR …………………………………1-14
Index to parts and controls …………………………………1-15
2.
DISASSEMBLY
2-1.
REMOVAL OF FRONT PANEL ASSY ……………2-1
2-2.
REMOVAL OF POWER BLOCK …………………2-1
2-3.
REMOVAL OF RP-196 BOARD and
MA-249 BOARD ……………………………………2-2
MA-249 BOARD ……………………………………2-2
2-4.
REMOVAL OF H MECHANISM …………………2-3
2-5.
CIRCUIT BOARDS LOCATION …………………2-3
2-6.
INTERNAL VIEWS…………………………………2-4
3.
BLOCK DIAGRAM
3-1.
OVERALL BLOCK DIAGRAM……………………3-1
3-2.
VIDEO, AUDIO, TUNER BLOCK DIAGRAM……3-4
3-3.
SERVO, SYSTEM CONTROL
BLOCK DIAGRAM
BLOCK DIAGRAM
………………………………3-7
3-4.
I/O BLOCK DIAGRAM ……………………………3-9
3-5.
POWER SUPPLY BLOCK DIAGRAM ……………3-11
4.
PRINTED WIRING BOARDS AND
SCHEMATIC DIAGRAMS
SCHEMATIC DIAGRAMS
4-1.
FRAME SCHEMATIC DIAGRAM
………………4-1
4-2.
PRINTED WIRING BOARDS AND
SCHEMATIC DIAGRAMS …………………………4-3
MA-249 (MAIN), RP-196 (HEAD AMP),
DM-46 (TRANSLATION)
SCHEMATIC DIAGRAMS …………………………4-3
MA-249 (MAIN), RP-196 (HEAD AMP),
DM-46 (TRANSLATION)
PRINTED WIRING BOARDS …………4-4
RP-196 (HEAD AMP) SCHEMATIC DIAGRAM …4-7
MA-249 (VIDEO) SCHEMATIC DIAGRAM
MA-249 (VIDEO) SCHEMATIC DIAGRAM
……4-10
MA-249 (SERVO, SYSTEM CONTROL),
SW-269 (SWITCH), DM-46 (TRANSLATION)
SW-269 (SWITCH), DM-46 (TRANSLATION)
SCHEMATIC DIAGRAMS
……………4-13
MA-249 (AUDIO) SCHEMATIC DIAGRAM ……4-16
MA-249 (TUNER) SCHEMATIC DIAGRAM ……4-19
MA-249 (TUNER) SCHEMATIC DIAGRAM ……4-19
MA-249 (DC POWER) SCHEMATIC DIAGRAM 4-21
CP-72 (CANAL PLUS)
CP-72 (CANAL PLUS)
PRINTED WIRING BOARD AND
SCHEMATIC DIAGRAM ………………4-23
SCHEMATIC DIAGRAM ………………4-23
POWER BLOCK (SR705)
PRINTED WIRING BOARD AND
SCHEMATIC DIAGRAM ………………4-25
SCHEMATIC DIAGRAM ………………4-25
5.
REPAIR PARTS LIST
5-1.
EXPLODED VIEWS ………………………………5-1
5-1-1. FRONT PANEL ASSY………………………………5-1
5-1-2. MAIN CHASSIS ASSEMBLY
5-1-2. MAIN CHASSIS ASSEMBLY
……………………5-2
5-1-3. VHS MECHANISM DECK ASSEMBLY-1 ………5-3
5-1-4. VHS MECHANISM DECK ASSEMBLY-2 ………5-4
5-1-5. VHS MECHANISM DECK ASSEMBLY-3 ………5-5
5-1-6. VHS MECHANISM DECK ASSEMBLY-4 ………5-6
5-2.
5-1-4. VHS MECHANISM DECK ASSEMBLY-2 ………5-4
5-1-5. VHS MECHANISM DECK ASSEMBLY-3 ………5-5
5-1-6. VHS MECHANISM DECK ASSEMBLY-4 ………5-6
5-2.
ELECTRICAL PARTS LIST ………………………5-7
6.
INTERFACE, IC PIN FUNCTION
DESCRIPTION
DESCRIPTION
6-1.
SYSTEM CONTROL — MECHANISM BLOCK
INTERFACE (MA-249 board IC501) ………………6-1
INTERFACE (MA-249 board IC501) ………………6-1
6-2.
SYSTEM CONTROL — SERVO PERIPHERAL
CIRCUIT INTERFACE (MA-249 board IC501)……6-1
CIRCUIT INTERFACE (MA-249 board IC501)……6-1
6-3.
SYSTEM CONTROL — SYSTEM CONTROL
PERIPHERAL CIRCUIT INTERFACE
(MA-249 board IC501)
PERIPHERAL CIRCUIT INTERFACE
(MA-249 board IC501)
……………………………6-2
6-4.
SYSTEM CONTROL AND RF MODULATOR —
INPUT SELECTION BLOCK INTERFACE
(MA-249 board IC501)
INPUT SELECTION BLOCK INTERFACE
(MA-249 board IC501)
……………………………6-2
6-5.
SYSTEM CONTROL —
VIDEO BLOCK INTERFACE
(MA-249 board IC501)
VIDEO BLOCK INTERFACE
(MA-249 board IC501)
……………………………6-2
6-6.
SYSTEM CONTROL —
AUDIO BLOCK INTERFACE
(MA-249 board IC501)
AUDIO BLOCK INTERFACE
(MA-249 board IC501)
……………………………6-2
6-7.
SERVO/SYSTEM CONTROL MICROPROCESSOR
M37775M (MA-249 board IC501) …………………6-3
M37775M (MA-249 board IC501) …………………6-3
7.
ADJUSTMENTS
7-1.
MECHANICAL ADJUSTMENTS …………………7-1
7-2.
ELECTRICAL ADJUSTMENTS……………………7-1
2-1.
PREPARATION BEFORE ADJUSTMENT ………7-1
2-1-1. Equipment Required…………………………………7-1
2-1-2. Equipment Connection ………………………………7-1
2-1-3. Input Signal Check …………………………………7-1
2-1-4. Alignment Tape
2-1-2. Equipment Connection ………………………………7-1
2-1-3. Input Signal Check …………………………………7-1
2-1-4. Alignment Tape
……………………………………7-1
2-1-5. Input/Output Levels and Impedance
………………7-2
2-1-6. Adjustment Sequence ………………………………7-2
2-2.
2-2.
POWER SUPPLY CHECK …………………………7-2
2-2-1. Output Voltage Check (MA-249 Board) ……………7-2
2-3.
2-3.
SERVO SYSTEM CHECK …………………………7-3
2-3-1. RF Switching Position Check
(MA-249, RP-196 Boards) …………………………7-3
2-4.
VIDEO SYSTEM CHECKS ………………………7-3
2-4-1. X'tal OSC Check (RV-40 Board) ……………………7-3
2-4-2. SYNC AGC Check (MA-249 Board) ………………7-4
2-4-3. White Clip/Dark Clip Check (MA-249 Board) ……7-4
2-4-4. Recording Y Level Check (MA-249 Board) ………7-4
2-4-5. Recording Chroma Level Check (MA-249 Board) …7-4
2-4-6. Playback Level Check (MA-249 Board) ……………7-5
2-5.
2-4-2. SYNC AGC Check (MA-249 Board) ………………7-4
2-4-3. White Clip/Dark Clip Check (MA-249 Board) ……7-4
2-4-4. Recording Y Level Check (MA-249 Board) ………7-4
2-4-5. Recording Chroma Level Check (MA-249 Board) …7-4
2-4-6. Playback Level Check (MA-249 Board) ……………7-5
2-5.
AUDIO SYSTEM ADJUSTMENT …………………7-5
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