SLV-772HF, SLV-779HF - Sony VCR Service Manual (repair manual). Page 3

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1.

ERROR CODE INDICATION ··········································· 4

Getting Started

Unpacking ··········································································· 1-1
Setting up the remote commander ······································· 1-1
Hookups ·············································································· 1-2
Selecting a language ···························································· 1-8
Setting the clock ·································································· 1-9
Setting up the cable box control ········································ 1-10
Presetting channels ···························································· 1-12
Setting up the VCR Plus+ system ····································· 1-14

Basic Operations

Playing a tape ···································································· 1-14
Recording TV programs ···················································· 1-15
Recording TV programs using the VCR Plus+ system ····· 1-16
Setting the timer manually ················································ 1-17

Additional Operations

Playing/searching at various speeds ·································· 1-18
Searching for a selected point on the tape ························· 1-18
Skip-searching automatically ············································ 1-19
Setting the recording duration time ··································· 1-19
Checking/changing/canceling timer settings ····················· 1-19
Recording stereo and bilingual programs ························· 1-20
Adjusting the picture ························································· 1-20
Changing menu options ····················································· 1-21
Editing with another VCR ················································· 1-21

Additional information

General setup information ················································· 1-22
Index to parts and controls ················································ 1-22

2-1.

CASE, FRONT PANEL BLOCK ASSEMBLY ·············· 2-1

2-2.

MF-316 BOARD, DM-84 BOARD ································ 2-1

2-3.

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

2-4.

MA-341 BOARD ···························································· 2-2

2-5.

MECHANISM DECK ····················································· 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 ·········································· 3-3

3-3.

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

3-4.

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

3-5.

POWER BLOCK DIAGRAM ········································· 3-9

4-1.

FRAME SCHEMATIC DIAGRAM ································ 4-3

4-2.

PRINTED WIRING BOARDS AND SCHEMATIC
DIAGRAMS ···································································· 4-5
• MA-341 (VUDEO, AUDIO, SERVO/SYSTEM

CONTROL, TUNER, POWER SUPPLY) PRINTED
WIRING BOARD ······················································· 4-5

• MA-341 (1/7) (VIDEO) SCHEMATIC

DIAGRAM ·································································· 4-7

• MA-341 (2/7) (AUDIO) SCHEMATIC

DIAGRAM ·································································· 4-9

• MA-341 (3/7) (SERVO/SYSTEM CONTROL)

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

• MA-341 (4/7) (AUDIO PROCESS) SCHEMATIC

DIAGRAM ································································ 4-13

• MA-341 (5/7) (TUNER) SCHEMATIC

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

• MA-341 (6/7) (MODE CONTROL) SCHEMATIC

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

• MA-341 (7/7) (POWER SUPPLY) SCHEMATIC

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

• DM-84 (TAPE OPARATION) PRINTED

WIRING BOARD ····················································· 4-22

• DM-84 (TAPE OPARATION) SCHEMATIC

DIAGRAM ································································ 4-22

• MF-316 (POWER/EJECT SWITCH)

SCHEMATIC DIAGRAM ········································· 4-23

• MF-316 (POWER/EJECT SWITCH) PRINTED

WIRING BOARD ····················································· 4-24

5-1.

SYSTEM CONTROL — MECHANISM BLOCK
INTERFACE (MA-341 BOARD IC160) ························ 5-1

5-2.

SYSTEM CONTROL — SERVO PERIPHERAL
CIRCUIT INTERFACE (MA-341 BOARD IC160) ······· 5-1

5-3.

SYSTEM CONTROL — SYSTEM CONTROL
PERIPHERAL CIRCUIT INTERFACE
(MA-341 BOARD IC160) ··············································· 5-2

5-4.

SYSTEM CONTROL AND RF MODULATOR
 — INPUT SELECTION BLOCK INTERFACE
(MA-341 BOARD IC160) ··············································· 5-2

5-5.

SYSTEM CONTROL — VIDEO/RP BLOCK
INTERFACE (MA-341 BOARD IC160) ························ 5-2

5-6.

SYSTEM CONTROL — AUDIO BLOCK
INTERFACE (MA-341 BOARD IC160) ························ 5-2

5-7.

SERVO/SYSTEM CONTROL MICROPROCESSOR PIN
FUNCTIONS (MA-341 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. 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-341 Board) ························· 6-2
2-3.

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

2-3-1. RF Switching Position Adjustment

(MA-341 Board) ······························································ 6-3

2-4.

AUDIO SYSTEM ADJUSTMENT ································· 6-3

2-4-1. Hi-Fi Audio System Adjustment ····································· 6-3

(Hi-Fi model only) ··························································· 6-3

2-4-2. HiFi Switching Position Adjustment

(MA-341 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

7-1

EXPLODED VIEWS ······················································ 7-1

7-1-1. FRONT PANEL AND UPPER CASE SECTION ·········· 7-1
7-1-2. CHASSIS SECTION ······················································· 7-2
7-1-3. MECHANISM DECK SECTION-1 ······························· 7-3
7-1-4. MECHANISM DECK SECTION-2 ······························· 7-4
7-1-5. MECHANISM DECK SECTION-3 ······························· 7-5
7-2.

ELECTRICAL PARTS LIST ·········································· 7-6