SLV-469, SLV-478, SLV-677HF, SLV-678HF, SLV-688HF, SLV-L47, SLV-L48, SLV-L57, SLV-L58, SLV-L67HF, SLV-L68HF, SLV-L77HF, SLV-L78HF, SLV-X50, SLV-X60HF - Sony VCR Service Manual (repair manual). Page 4

— 4 —

1.

ERROR CODE INDICATION ··········································· 6

2.

HOW TO REPLACE A ROTARY UPPER DRUM
(HiFi MODEL) ··································································· 7

2-1.

HOW TO REMOVE A ROTARY UPPER DRUM ············ 7

2-2.

HOW TO ATTACH A NEW ROTARY
UPPER DRUM ··································································· 7

Getting Started

Unpacking ·············································································· 1-1
Setting up the remote commander ········································· 1-1
Hookups ················································································· 1-1
Selecting a language ······························································ 1-7
Setting the clock ···································································· 1-7
Setting up cable box control ·················································· 1-7
Presetting channels ································································ 1-9
Setting up VCR Plus+ ·························································· 1-10

Basic Operations

Playing a tape ······································································· 1-11
Recording TV programs ······················································ 1-11
Recording TV programs using VCR Plus+ ························· 1-12
Setting the timer manually ··················································· 1-13

Additional Operations

Playing/searching at various speeds ···································· 1-14
Searching for a selected point on the tape ··························· 1-14
Skip-searching automatically ··············································· 1-14
Recording TV programs using the quick timer ··················· 1-15
Checking/changing/cancelling timer settings ······················ 1-15
Recording stereo and bilingual programs ···························· 1-15
Adjusting the picture ··························································· 1-16
Changing menu options ······················································· 1-16
Editing with another VCR ··················································· 1-16

Additional Information

General setup information ··················································· 1-17
Troubleshooting ··································································· 1-17
Index to parts and controls ··················································· 1-18

2-1.

UPPER CASE, FRONT PANEL BLOCK ASSEMBLY · 2-1

2-2.

DS-79 BOARD, JK-161 BOARD ··································· 2-1

2-3.

REAR PANEL ································································· 2-2

2-4.

MA-317 BOARD WITH S MECHANISM DECK
ASSEMBLY ···································································· 2-2

2-5.

S MECHANISM DECK ASSEMBLY,
MA-317 BOARD ···························································· 2-3

2-6.

INTERNAL VIEWS ························································ 2-4

2-7.

CIRCUIT BOARDS LOCATION ··································· 2-5

3-1.

OVERALL BLOCK DIAGRAM ···································· 3-1

3-2.

VIDEO BLOCK DIAGRAM ·········································· 3-4

3-3.

SERVO/SYSTEM CONTROL BLOCK DIAGRAM ····· 3-5

3-4.

AUDIO BLOCK DIAGRAM ········································· 3-7

3-5.

TUNER BLOCK DIAGRAM ········································· 3-9

3-6.

POWER SUPPLY BLOCK DIAGRAM ······················· 3-11

4-1.

FRAME SCHEMATIC DIAGRAM ································ 4-1

4-2.

PRINTED WIRING BOARDS AND
SCHEMATIC DIAGRAMS ············································ 4-3

• MA-317 (REC/PB AMP, VIDEO, SERVO/SYSTEM

CONTROL, AUDIO, MODE CONTROL,
TUNER, POWER SUPPLY)
PRINTED WIRING BOARD ························· 4-3

• MA-317 (REC/PB AMP)

SCHEMATIC DIAGRAM ······························ 4-5

• MA-317 (VIDEO)

SCHEMATIC DIAGRAM ······························ 4-8

• MA-317 (SERVO/SYSTEM CONTROL)

SCHEMATIC DIAGRAM ···························· 4-11

• MA-317 (AUDIO)

SCHEMATIC DIAGRAM ···························· 4-15

• MA-317 (MODE CONTROL)

SCHEMATIC DIAGRAM ···························· 4-17

• MA-317 (TUNER)

SCHEMATIC DIAGRAM ···························· 4-19

• MA-317 (POWER SUPPLY)

SCHEMATIC DIAGRAM ···························· 4-21

• DS-79 (OPERATION SWITCHES)

PRINTED WIRING BOARD AND
SCHEMATIC DIAGRAM ···························· 4-23

• JK-161 (LINE IN 2)

PRINTED WIRING BOARD AND
SCHEMATIC DIAGRAM ···························· 4-24

5-1.

SYSTEM CONTROL —
MECHANISM BLOCK INTERFACE
(MA-317 BOARD IC160) ··············································· 5-1

5-2.

SYSTEM CONTROL —
SERVO PERIPHERAL CIRCUIT INTERFACE
(MA-317 BOARD IC160) ··············································· 5-1

5-3.

SYSTEM CONTROL — SYSTEM CONTROL
PERIPHERAL CIRCUIT INTERFACE
(MA-317 BOARD IC160) ··············································· 5-2

5-4.

SYSTEM CONTROL  AND RF MODULATOR—
INPUT SELECTION BLOCK INTERFACE
(MA-317 BOARD IC160) ··············································· 5-2

5-5.

SYSTEM CONTROL —
VIDEO/RP BLOCK INTERFACE
(MA-317 BOARD IC160) ··············································· 5-2

5-6.

SYSTEM CONTROL —
AUDIO BLOCK INTERFACE
(MA-317 BOARD IC160) ··············································· 5-2

5-7.

SERVO/SYSTEM CONTROL MICROPROCESSOR
(MA-317 BOARD IC160) ··············································· 5-3

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. Input Signal Check ·························································· 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-317 Board) ························· 6-2
2-3.

SERVO SYSTEM CHECK ············································· 6-3

2-3-1. RF Switching Position/

AF Switching Position Adjustments (MA-317 Board) ··· 6-3

2-4.

VIDEO SYSTEM CHECKS AND ADJUSTMENT ······· 6-4

2-4-1. X’tal OSC Check (MA-317 Board) ································· 6-4
2-4-2. SYNC AGC Check (MA-317 Board) ······························ 6-4
2-4-3. White Clip/Dark Clip Check (MA-317 Board) ··············· 6-4
2-4-4. Recording Y Level Check (MA-317 Board) ··················· 6-5
2-4-5. Recording Chroma Level Check(MA-317 Board) ·········· 6-5
2-4-6. Playback Level Check (MA-317 Board) ························· 6-5