Sony Slv-779hf - video cassette recorder User manual

US Model

SLV-779HF

Canadian Model

SLV-772HF/779HF

SERVICE MANUAL

VIDEO CASSETTE RECORDER

MICROFILM

S MECHANISM

SLV-772HF/ 779HF

RMT-V266

Refer to the SERVICE MANUAL ofVHS

MECHANICAL ADJUSTMENT for

MECHANICAL ADJUSTMENTS. (9-921-647-11)

SPECIFICATIONS

Photo: SLV-779HF

RMT-V266

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TEL 13942296513 QQ 376315150 892498299

http://www.xiaoyu163.com

— 2 —

SAFETY-RELATED COMPONENT WARNING!!

COMPONENTS IDENTIFIED BY MARK !OR DOTTED LINEWITH

MARK !ON THE SCHEMATIC DIAGRAMS AND INTHE PARTS

LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE

COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS

APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS

PUBLISHED BY SONY.

ATTENTION AU COMPOSANT AYANT RAPPORT

À LA SÉCURITÉ!

LES COMPOSANTS IDENTIFÉS PAR UNE MARQUE !SUR LES

DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT

CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE

REMPLACER CES COMPOSANTS QUE PAR DES PIÈSES SONY

DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU

DANS LES SUPPÉMENTS PUBLIÉS PAR SONY.

SAFETY CHECK-OUT

After correcting the original service problem, perform the following

safety checks before releasing the set to the customer.

1. Check theareaofyour repairfor unsoldered or poorly-soldered

connections.Check the entire board surfacefor solder splashes

and bridges.

2. Check the interboard wiring to ensure that no wires are

"pinched" or contact high-wattage resistors.

3. Look for unauthorized replacement parts, particularly

transistors, that were installed during a previous repair. Point

them out to the customer and recommend their replacement.

4. Look for parts which, though functioning, show obvious signs

of deterioration. Point them out to the customer and

recommend their replacement.

5. Check the line cord for cracks and abrasion.

Recommend the replacement of any such line cord to the

customer.

6. Check the B+ voltage to see it is at the values specified.

7. Check the antenna terminals, metal trim, "metallized" knobs,

screws, and all other exposed metal parts for AC leakage.

Check leakage as described below.

LEAKAGE TEST

The AC leakage from any exposed metal part to earth ground and

from all exposed metal parts to any exposed metal part having a

return to chassis, must not exceed 0.5mA (500 microampers).

Leakage current can be measured by any one of three methods.

1. A commercial leakage tester, such as the Simpson 229 or RCA

TW-540A. Follow the manufacturers' instructions to use these

instruments.

2. A battery-operatedAC milliammeter. The Data Precision 245

digital multimeter is suitable for this job.

3. Measuring the voltage drop across a resistor by means of a

VOM or battery-operatedAC voltmeter. The "limit" indication

is 0.75V, so analog meters must have an accurate low voltage

scale. The Simpson 250 and Sanwa SH-63Trd are examples

of a passiveVOM that is suitable. Nearly all battery operated

digital multimeters that have a 2VAC range are suitable. (See

Fig. A)

To Exposed Metal

Parts on Set

0.15

µ

F1.5 k

Ω

AC

Voltmeter

(0.75V)

Earth Ground

Fig.A. Using an AC voltmeter to check AC leakage.

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— 3 —

TABLE OF CONTENTS

SERVICE NOTE

1. ERROR CODE INDICATION ··········································· 4

1. GENERAL

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 theVCR 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. DISASSEMBLY

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. BLOCK DIAGRAMS

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. PRINTEDWIRING BOARDS AND

SCHEMATIC DIAGRAMS

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. INTERFACE, IC PIN FUNCTION

DESCRIPTION

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. 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-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. 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·······················································7-2

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

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— 4 —

1. ERROR CODE INDICATION

• Error codes are indicated using the lower 5 digits in the fluorescent display tube.

“At this time, Colon “:” between character is not indicated.”

ERROR CODE

MODE CODE

0 Power-on eject 10 FWD x1 20 REW play

1 Power-on initial 11 FWD x2 21 Cas. loading

2 Power-off eject 12 CUE 22 Tape loading

3 Power-off stop 13 PB-pause 23 Power-off loading

4 FF 14 RVS-pause 24 Mecha. error (Power on)

5 REW 15 RVS x1 25 Power-on eject initial

6 REC 16 RVS x2 26 Power-off eject initial

7 REC- pause 17 REV 27 APC REC

8 Power-on stop 18 Power-off initial 28 Cas. loading

9 PB 19 Mecha. error (Power off) (No auto PB check)

0 No error

1 Cam encoder error Loading direction

2 Cam encoder error Unloading direction

3 T reel error

4 S reel error

5 Capstan error

6 Drum error

7 Error on initializing

8 Cassette loading error

9 Reserve

SERVICE NOTE

Mode code indication when the error has occurred.

Error code

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1-1

SLV-772HF/779HF

SECTION 1

GENERAL This section is extracted from

instruction manual.

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TEL 13942296513 QQ 376315150 892498299

http://www.xiaoyu163.com

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http://www.xiaoyu163.com

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http://www.xiaoyu163.com

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http://www.xiaoyu163.com

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