Sony SLV-L56AR, SLV-L76HFAR, SLV-L86HFAR Service manual

SLV-L56AR/L76HFAR/L86HFAR

RMT-V247E/V247F

SERVICE MANUAL

Photo: SLV-L86HFAR

• Refer to the SERVICE MANUAL of VHS MECHANICAL ADJUSTMENTS VI for MECHANICAL ADJUSTMENTS. (9-921-647-11)

* The abbreviations of L56, L76HF and L86HF contained in this service manual

are indicated when these models are common to all their corresponding models as given below.

Abbreviated model name

All model

names

SLV-

L56

L56AR

L76HF

L76HF AR

L86HF

L86HFAR

Argentina Model

S MECHANISM

SPECIFICATIONS

– Continued on next page –

VIDEO CASSETTE RECORDER

MICROFILM

• Feature Difference SLV- L56 L76HF L86HF

FEATURE

HEAD/CH 4/4 4/6 4/6 RCA FRONT LINE IN GG®(3P) CLICK SHUTTLE GG® REMOTE COMMANDER RMT- V247E V247F V247F

SAFETY CHECK-OUT

After correcting the original service problem, perform the following safety checks before releasing the set to the customer:

1. Check the area of your repair for unsoldered or poorly-sol-

dered connections. Check the entire board surface for 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 transis-

tors, that were installed during a previous repair. Point them out to the customer and recommend their replacement.

SAFETY-RELATED COMPONENT WARNING!!

COMPONENTS IDENTIFIED BY MARK ! OR DOTTED LINE WITH MARK ! ON THE SCHEMATIC DIAGRAMS AND IN THE 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.

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

– 2 –

TABLE OF CONTENTS

Section Title Page Section Title Page

Feature Difference................................................................... 2

SERVICE NOTE...................................................................... 4

1. GENERAL

Getting Started .............................................................. 1-1

Basic Operations ........................................................... 1-6

Additional Operations.................................................... 1-9

Editing............................................................................ 1-12

Additional Information ................................................... 1-14

5. INTERFACE, IC PIN FUNCTION DESCRIPTION

5-1. System Control-Video Block Interface

(MA-323 board IC161) .................................................. 5-1

5-2. System Control-Servo Peripheral Circuit Interface

(MA-323 board IC161) .................................................. 5-1

5-3. System Control-Mechanism Block Interface

(MA-323 board IC161) .................................................. 5-2

5-4. System Control-Audio Block Interface

(MA-323 board IC161) .................................................. 5-3

5-5. Servo/System/Timer/Tuner Control Microprocessor

Pin Function (MA-323 board IC161)............................. 5-4

2. DISASSEMBLY

2-1. Upper Case Removal.................................................... 2-1

2-2. Rear Panel Removal ..................................................... 2-1

2-3. Power Block Removal ................................................... 2-1

2-4. Front Panel Section Removal ....................................... 2-1

2-5. Mechanism Deck Removal ........................................... 2-2

2-6. MA-323 Board Removal................................................ 2-2

2-7. Internal Views ................................................................ 2-3

2-8. Circuit Boards Location ................................................. 2-4

3. BLOCK DIAGRAMS

3-1. Overall Block Diagram .................................................. 3-1

3-2. Video (1) Block Diagram ............................................... 3-4

3-3. Video (2) Block Diagram ............................................... 3-5

3-4. Servo/System Control Block Diagram .......................... 3-7

3-5. Audio Block Diagram..................................................... 3-9

3-6. Tuner Block Diagram ..................................................... 3-11

3-7. Mode Control Block Diagram ........................................ 3-13

3-8. Power Block Diagram.................................................... 3-15

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-323 Printed Wiring Board ....................................... 4-5

MA-323 (Head Amp) Schematic Diagram .................... 4-9

MA-323 (Video, Audio) Schematic Diagram................. 4-11

MA-323 (System Control) Schematic Diagram ............ 4-17

MA-323 (Servo Control) Schematic Diagram ............... 4-19

MA-323 (Hi-Fi Audio) Schematic Diagram.................... 4-21

MA-323 (IO) Schematic Diagram.................................. 4-23

MA-323 (Tuner) Schematic Diagram ............................ 4-25

MA-323 (Mode Control) Schematic Diagram ............... 4-27

MA-323 (FL Driver) Schematic Diagram....................... 4-29

MA-323 (Power Supply) Schematic Diagram ............... 4-31

DM-76, MF-312 Printed wiring Boards and

Schematic Diagrams ..................................................... 4-33

HS-921SF1 Printed Wiring Board................................. 4-35

HS-921SF1 (Power Supply) Schematic Diagram......... 4-37

SR-708 Printed Wiring Board ....................................... 4-39

SR-708 (Power Supply) Schematic Diagram ............... 4-41

6. ERROR CODES ....................................................... 6-1

7. ADJUSTMENTS

7-1. Mechanical Adjustments ............................................... 7-1

7-2. Electrical Adjustments ................................................... 7-1

2-1. Pre-Adjustment Preparations........................................ 7-1

2-1-1. Instruments to be Used............................................ 7-1

2-1-2. Connection ............................................................... 7-1

2-1-3. Set-up of Adjustment................................................ 7-1

2-1-4. Alignment Tape......................................................... 7-1

2-1-5. Specified I/O Level and Impedance......................... 7-1

2-1-6. Adjusting Sequence ................................................. 7-2

2-2. Power Supply Adjustment............................................. 7-2

2-2-1. Power Supply Check................................................ 7-2

2-2-2. +6V Adjustment ........................................................ 7-2

2-3. Servo System Adjustment ............................................. 7-2

2-3-1. RF Switching Position Adjustment........................... 7-2

2-4. Audio System Adjustments ........................................... 7-3

2-4-1. Hi-Fi Audio System Adjustment ............................... 7-3

1. AF Switching Position Adjustment........................... 7-3

2. Frequency Response Check.................................... 7-3

3. Overall Level Characteristic and Distortion

Factor Check ............................................................ 7-4

4. Overall S/N Check.................................................... 7-4

2-4-2. Normal Audio System Adjustment ........................... 7-4

1. ACE Head Adjustment ............................................. 7-4

2. E-E Output Level Check .......................................... 7-4

3. Frequency Responce Check.................................... 7-4

4. Overall Level Characteristic and Distortion

Factor Check ............................................................ 7-5

5. Overall S/N Check.................................................... 7-5

2-5. Tuner System Adjustment ............................................. 7 -5

2-5-1. Separation Adjustment............................................. 7-5

2-6. Parts Arrangement Diagram for Adjustments............... 7-6

8. REPAIR PARTS LIST

8-1. Exploded Views ............................................................. 8-1

8-1-1. Front Panel and Cabinet Assemblies ...................... 8-1

8-1-2. Chassis Assembly .................................................... 8-2

8-1-3. Mechanism Chassis Assembly (1)........................... 8-3

8-1-4. Mechanism Chassis Assembly (2)........................... 8-4

8-1-5. Mechanism Chassis Assembly (3)........................... 8-5

8-2. Electrical Parts List........................................................ 8-6

– 3 –

SERVICE NOTE

1. DISASSEMBLY

• This set can be disassembled in the order shown below. Note: Pages in indicated pages in the SERVICE MANUAL.

Pages in indicated pages in the VHS MECHANICAL ADJUSTMENT MANUAL VI.

Set

Upper case (Page 2-1)

Front Panel

Section

(Page 2-1)

FL Complete

Ass’y

(Page 13)

Retainer

Plate

(Page 22)

FL Slider

Block Ass’y

(Page 22)

Cam Gear

(Page 23)

Pinch Press

Block Ass’y

(Page 14)

Mechanism

Deck

(Page 2-2)

Rubber

Belt

(Page 15)

Capstan

Motor

(Page 15)

Cam Motor

Retainer

(Page 31)

Ground Shaft

Ass’y

(Page 13)

Drum Ass’y

(Page 13)

Rubber

Belt

(Page 15)

Pully Gear

Ass’y

(Page 29)

Reel Direct

Ass’y

(Page 30)

Rear

Panel

(Page 2-1)

Power

Block

(Page 2-1)

MA-323

Board

(Page 2-2)

Rotary Switch

(Page 2-2)

Tuner

Unit

Rubber

Belt

(Page 15)

Slider

(Page 26)

Gear (T, S)

(Page 28)

Cam Motor

(Page 31)

– 4 –

SECTION 1

GENERAL

SLV-L56/L76HF/L86HF

This section is extracted from instruction manual (3-866-973-11).

1-1

1-2

1-3

1-4

1-5

1-6

1-7

1-8

1-9

1-10

1-11

1-12

1-13

1-14

1-15 E

1-15

SLV-L56/L76HF/L86HF

2 Flat cable

(CN105)

1 Flat cable

(CN424)

4 Three claws

5 Three claws

6 Front panel section

L86HF

3 Connector

(CN423)

SECTION 2

DISASSEMBLY

Note: Follow the disassembly procedure in the numerical order given.

2-1. UPPER CASE REMOVAL 2-3. POWER BLOCK REMOVAL

1 Two tapping screws

3 Upper case

2 Two tapping screws

4 Power block

3 Screw

(B3)

2 Screw

(B3)

1 Connector

(CN600)

2-2. REAR PANEL REMOVAL

6 Two claws

2 Harness

5 Three claws

2-4. FRONT PANEL SECTION REMOVAL

7 Rear panel

1 Power cord

3 Claw

4 Claw

(L76HF/L86HF)

2-1

2-5. MECHANISM DECK REMOVAL

4 Connector

(FE head )

8 Two screws

(BVTP3 × 12)

1 Connector

(CN101 )

2 Flexible board

3 Connector

(ACE head )

5 Screw

(B3)

6 Earth lug

0 Mechanism

deck

9 Screw

(BVTP3 × 12)

7 Screw

(B3)

Note: When mounting the mechanism deck,

first align ¢ mark on the rotary switch.

2-6. MA-323 BOARD REMOVAL

1 Five screws

(B3)

2 MA-323

board

2-2

2-7. INTERNAL VIEWS

Drum assembly (M901) (DZH-74E/Z-RP) 8-839-037-04 (L56) Drum assembly (M901) (DZH-95A/Z-RP) 8-839-045-02 (L76HF/L86HF)

FE head 1-500-144-11

Q100 Tape top sensor 8-729-043-84

ACE head assembly A-6759-620-A

D102 Tape top/end LED 8-719-048-26

Q101 Tape end sensor 8-729-043-84

Capstan motor 1-698-971-11

Drum assembly (M901) (DZH-74E/Z-RP) 8-839-037-04 (L56) Drum assembly (M901) (DZH-95A/Z-RP) 8-839-045-02 (L76HF/L86HF)

Cam motor assembly X-3947-577-1

2-3

2-8. CIRCUIT BOARDS LOCATION

MF-312

MODE CONTROL,

(

FRONT IN

)

MA-323

VIDEO, AUDIO, I/O,

(

SERVO/SYSTEM CONTROL, TUNER

)

DM-76 (MODE CONTROL)

POWER BLOCK (HS-921SF1) (L56) POWER BLOCK (SR-708) (L76HF/L86HF) (POWER SUPPLY)

2-4

2-4 E

3-1.OVERALL BLOCK DIAGRAM

MA-323

BOARD

(SEE PAGE 4-9~4-32)

SLV-L56/L76HF/L86HF

SECTION 3

BLOCK DIAGRAMS

LINE-1 IN VIDEO

L86HF

LINE-2 IN VIDEO

CNJ901

J481

L56/L76HF

MF-312

BOARD(1/3)

(SEE PAGE 4-34)

VIDEO HEAD

SP CH1

SP CH2

EP CH2

Hi-Fi AUDIO HEAD CH1

CH2

L76HF/L86HF

LINE-1 IN

L86HF

LINE-2 IN

JS201

CNJ901

MF-312

(SEE PAGE 4-34)

J481

LINE2 VIDEO

L86HF

L76HF/L86HF

BOARD(2/3)

IC203

VIDEO INPUT

SELECT

IC501

PB RF, REC RF, C ROT

VIDEO

REC/PB

AMPEP CH1

SD1, SCK1 RF SWP, RF ENV, COMP SYNC

IC340

AF REC, AF SWP, AF REC P

AUDIO

REC/PB

AMP

FM PB, FM REC

LINE1 AUDIO L

LINE1 AUDIO R

AV IN SEL1, 2

IC901

AMP

(1/2)

IC201

VIDEO VIDEO VIDEO

Y/C

PROCESS

SD1, SCK1

IC360

Hi-Fi

AUDIO

PROCESS

LINE2 AUDIO L

LINE2 AUDIO R

IC161

Q400,402

OSD

BLOCK

IC202

1H CCD

DELAY

LINE

LINE OUT1 L

LINE OUT1 R

MOD AUDIO

IIC DETA, IIC CLK

AF SWP,AF ENV

NORMAL AUDIO

L56

JS364

(1/2)

L56

JS719

CNJ901

VIDEO

L76HF/L86HF

LINE OUT

UHF/VHF

TUNER M

OUT

TUMER L TUMER R TUNER M

R758

L56

JS716

PROCESSOR

L76HF/L86HF

MPX OUT

US MPX

IC750

TU701

TUNER

MOD V

TU VIDEO

MOD AUDIO

L76HF/L86HF

RF SWP, RF ENV, COMP SYNC

AF ENV, AF REC, AF SWP AF REC P,REC P

IC163

EEP

ROM

TV/VTR, AFT

PLL DATA, PLL CLK

PLL ENABLE

AV IN SEL 1, 2

SD1, SCK1

IIC DATA, IIC CLK

IIC DATA IIC CLK WRITE CONT

MAIN/SAP

F MONO

TA MUTE

SAP DET OUT

STEREO DET OUT

IC161

(2/2)

SERVO/SYSTEM

CONTROL,

MODE CONTROL

DRUM MOTOR (M901)

D VS

D FG D PG

DRUM MOTOR

DRUM FG DRUM PG

CAPSTAN MOTOR (M902)

CAP VS

CAP FG

CTL

IC130

CAM MOTOR

DRIVER

S100

MODE1-4

END LED

POWER FAIL

RESET

REMOCON

KEY1

ROTARY SWITCH

MECHA

POSITION

PH100 T REEL

PH101 S REEL

Q101

T SENS

Q100

S SENS

REC PROOF

POWER FAIL DET

RESET PULSE

GENERATOR

FUNCTION

KEY

CAM+, –

D102

S101

IC162

CAPSTAN

CAP FG

MOTOR

CAM MOTOR

CTL HEAD

M903

MF-312

BOARD (3/3)

(SEE PAGE 4-34)

IC401

REMOTE COMMANDER

RECEIVER

S403

AUDIO HEAD

REC/PB

ERASE

FULL ERASE

JS301

L56

DM-76

BOARD

A MUTE

SW 12V

JS302

PS301

T301

ERASE

OSC

L56

L76HF/L86HF

T302

ERASE

OSC

AC IN

HEAD

SWITCH

HEAD CONTROL

SWITCH

POWER SUPPLY

UNIT

Q301, 302

Q303, 311, 312

REC P

IC201(2/2)

NORMAL

AUDIO

PROCESS

NORMAL AUDIO TUNER M

35V 13V 6V

-13V

ND420

FLUORESENT

INDICATOR TUBE

IC420

DRIVER

POWER LED

S IN

S OUT S CLK

FLD CS

KEY2

DMS1, 2

FUNCTION

KEY

(SEE PAGE 4-34)

FUNCTION

KEY

CLICK

SHUTTLE

L86HF

3-1 3-2

+ 55 hidden pages