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

SLV-L56AR/L76HFAR/L86HFAR

RMT-V247E/V247F

SERVICE MANUAL

Argentina Model

Photo: SLV-L86HFAR

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

S MECHANISM

G

*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	L56	L76HF	L86HF
	model name
	All model
	names	L56AR	L76HFAR	L86HFAR
	SLV-

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	G	G	®(3P)
CLICK SHUTTLE	G	G	®
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 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 B+ voltage to see it is at the values specified.

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.

– 2 –

TABLE OF CONTENTS

Section		Title	Page	Section		Title	Page
Feature Difference ...................................................................			2	5.	INTERFACE, IC PIN FUNCTION DESCRIPTION
SERVICE NOTE ......................................................................			4
				5-1. System Control-Video Block Interface
1.	GENERAL				(MA-323 board IC161) ..................................................		5-1
				5-2. System Control-Servo Peripheral Circuit Interface
					(MA-323 board IC161) ..................................................		5-1
	Getting Started ..............................................................		1-1	5-3.	System Control-Mechanism Block Interface
	Basic Operations ...........................................................		1-6		(MA-323 board IC161) ..................................................		5-2
	Additional Operations ....................................................		1-9	5-4.	System Control-Audio Block Interface
	Editing ............................................................................		1-12		(MA-323 board IC161) ..................................................		5-3
	Additional Information ...................................................		1-14	5-5.	Servo/System/Timer/Tuner Control Microprocessor
					Pin Function (MA-323 board IC161) .............................		5-4
2.	DISASSEMBLY			6.	ERROR CODES
							6-1
2-1.	Upper Case Removal ....................................................		2-1
2-2.	Rear Panel Removal .....................................................		2-1
2-3.	Power Block Removal ...................................................		2-1	7.	ADJUSTMENTS
2-4.	Front Panel Section Removal .......................................		2-1
2-5.	Mechanism Deck Removal ...........................................		2-2	7-1.	Mechanical Adjustments ...............................................		7-1
2-6.	MA-323 Board Removal ................................................		2-2	7-2.	Electrical Adjustments ...................................................		7-1
2-7.	Internal Views ................................................................		2-3	2-1.	Pre-Adjustment Preparations ........................................		7-1
2-8.	Circuit Boards Location	.................................................	2-4	2-1-1.		Instruments to be Used ............................................	7-1
				2-1-2. Connection ...............................................................			7-1
3.	BLOCK DIAGRAMS			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
3-1.	Overall Block Diagram ..................................................		3-1	2-1-6.		Adjusting Sequence .................................................	7-2
3-2. Video (1) Block Diagram ...............................................			3-4	2-2.	Power Supply Adjustment .............................................		7-2
3-3. Video (2) Block Diagram ...............................................			3-5	2-2-1.		Power Supply Check ................................................	7-2
3-4.	Servo/System Control Block Diagram ..........................		3-7	2-2-2.		+6V Adjustment ........................................................	7-2
3-5.	Audio Block Diagram .....................................................		3-9	2-3.	Servo System Adjustment .............................................		7-2
3-6.	Tuner Block Diagram .....................................................		3-11	2-3-1.		RF Switching Position Adjustment ...........................	7-2
3-7.	Mode Control Block Diagram ........................................		3-13	2-4.	Audio System Adjustments ...........................................		7-3
3-8.	Power Block Diagram ....................................................		3-15	2-4-1.		Hi-Fi Audio System Adjustment ...............................	7-3
				1.		AF Switching Position Adjustment ...........................	7-3
				2.		Frequency Response Check ....................................	7-3
4.	PRINTED WIRING BOARDS AND			3.		Overall Level Characteristic and Distortion
	SCHEMATIC DIAGRAMS					Factor Check ............................................................	7-4
				4.		Overall S/N Check ....................................................	7-4
4-1.	Frame Schematic Diagram		4-3	2-4-2. Normal Audio System Adjustment ...........................			7-4
				1.		ACE Head Adjustment	7-4
4-2.	Printed Wiring Boards and Schematic Diagrams		4-5
				2.		E-E Output Level Check	7-4
	MA-323 Printed Wiring Board		4-5
				3.		Frequency Responce Check	7-4
	MA-323 (Head Amp) Schematic Diagram		4-9
				4.		Overall Level Characteristic and Distortion
	MA-323 (Video, Audio) Schematic Diagram		4-11
						Factor Check	7-5
	MA-323 (System Control) Schematic Diagram		4-17
				5.		Overall S/N Check	7-5
	MA-323 (Servo Control) Schematic Diagram		4-19
				2-5.	Tuner System Adjustment		7-5
	MA-323 (Hi-Fi Audio) Schematic Diagram		4-21
				2-5-1.		Separation Adjustment	7-5
	MA-323 (IO) Schematic Diagram		4-23
				2-6. Parts Arrangement Diagram for Adjustments			7-6
	MA-323 (Tuner) Schematic Diagram		4-25
	MA-323 (Mode Control) Schematic Diagram ...............		4-27
	MA-323 (FL Driver) Schematic Diagram .......................		4-29	8.	REPAIR PARTS LIST
	MA-323 (Power Supply) Schematic Diagram ...............		4-31
	DM-76, MF-312 Printed wiring Boards and			8-1.	Exploded Views		8-1
	Schematic Diagrams .....................................................		4-33
	HS-921SF1 Printed Wiring Board .................................		4-35	8-1-1.		Front Panel and Cabinet Assemblies ......................	8-1
	HS-921SF1 (Power Supply) Schematic Diagram .........		4-37	8-1-2.		Chassis Assembly ....................................................	8-2
	SR-708 Printed Wiring Board .......................................		4-39	8-1-3.		Mechanism Chassis Assembly (1) ...........................	8-3
	SR-708 (Power Supply) Schematic Diagram ...............		4-41	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

Pinch Press

Ground Shaft

Rear

Section

Block Ass’y

Ass’y

Panel

(Page 2-1)

(Page 14)

(Page 13)

(Page 2-1)

FL Complete

Mechanism

Drum

Power

Ass’y

Deck

Ass’y

Block

(Page 13)

(Page 2-2)

(Page 13)

(Page 2-1)

Retainer

Rubber

Rubber

MA-323

Plate

Belt

Belt

Board

(Page 22)

(Page 15)

(Page 15)

(Page 2-2)

FL Slider

Capstan

Pully Gear

Rotary

Block Ass’y

Motor

Ass’y

Switch

(Page 22)

(Page 15)

(Page 29)

(Page 2-2)

Cam Gear

Cam Motor

Reel Direct

Retainer

Ass’y

(Page 23)

(Page 31)

(Page 30)

Rubber

Cam Motor

Belt

(Page 31)

(Page 15)

Slider

(Page 26)

Loading

Gear (T, S)

(Page 28)

Tuner

Unit

– 4 –

SECTION 1	SLV-L56/L76HF/L86HF
	This section is extracted from instruction
GENERAL
	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

11-15-15E

	SLV-L56/L76HF/L86HF
	SECTION 2
	DISASSEMBLY
Note: Follow the disassembly procedure in the numerical order given.
2-1. UPPER CASE REMOVAL	2-3. POWER BLOCK REMOVAL
3 Upper case	2 Screw
1 Two tapping screws	(B3)
	4 Power block

2 Two tapping screws

3 Screw

(B3)

1 Connector

(CN600)

	2-2. REAR PANEL REMOVAL	2-4. FRONT PANEL SECTION REMOVAL
	7 Rear panel	L86HF
		3 Connector
	6 Two claws	(CN423)
	1 Power cord	2 Flat cable
	2 Harness	(CN105)
		4 Three claws

	3 Claw
	4 Claw	1 Flat cable
	(L76HF/L86HF)
		(CN424)
	5 Three claws
		6 Front panel section
		5 Three claws

2-1

2-5. MECHANISM DECK REMOVAL

3 Connector

4 Connector (ACE head ) (FE head )

8 Two screws (BVTP3 × 12)

5 Screw

(B3)

6 Earth lug

	1 Connector	0 Mechanism
		deck
	(CN101 )

9 Screw

(BVTP3 × 12) 7 Screw

(B3)

2 Flexible board

3 Note: When mounting the mechanism deck, first align ¢mark on the rotary switch.

2-6. MA-323 BOARD REMOVAL

1Five 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)

ACE head assembly

A-6759-620-A

FE head 1-500-144-11

D102

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

Q100

Tape top sensor

8-729-043-84 Q101

Tape end sensor 8-729-043-84

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)

Capstan motor 1-698-971-11

Cam motor assembly

X-3947-577-1

2-3

2-8. CIRCUIT BOARDS LOCATION

MA-323

( VIDEO, AUDIO, I/O, ) SERVO/SYSTEM CONTROL, TUNER

MF-312

( MODE CONTROL, ) FRONT IN

POWER BLOCK (HS-921SF1) (L56)

DM-76

POWER BLOCK (SR-708) (L76HF/L86HF)

(MODE CONTROL)

(POWER SUPPLY)

22-4-4E

SLV-L56/L76HF/L86HF

SECTION 3

BLOCK DIAGRAMS

3-1. OVERALL BLOCK DIAGRAM

MA-323 BOARD

(SEE PAGE 4-9~4-32)

L56/L76HF

IC203

(1/2)

IC161

(1/2)

TU701

IC161

DRUM MOTOR (M901)

CNJ901

JS201

IC201

Q400,402

CNJ901

IN

(2/2)

V1

VIDEO

VIDEO

VIDEO

OSD

VIDEO

UHF/VHF

TUNER

TV/VTR, AFT

D VS

M DRUM MOTOR

LINE-1 IN

VIDEO

BLOCK

VIDEO

PLL DATA, PLL CLK

INPUT

Y/C

OUT

D FG

L

LINE OUT

PLL ENABLE

SERVO/SYSTEM

DRUM FG

SELECT

OUTMPX

MODV VIDEOTU

AUDIOMOD

D PG

L86HF

J481

(SEE PAGE 4-34)

LINE2

PROCESS

LINE

CONTROL,

CAPSTAN MOTOR (M902)

IC202

DRUM PG

R

MODE CONTROL

MF-312 BOARD(1/3)

1H CCD

DELAY

L76HF/L86HF

LINE-2 IN

VIDEO

VIDEO

CAP VS

CAPSTAN

M

CAP FG

MOTOR

CAP FG

AV IN SEL1, 2

CTL

CTL HEAD

IC130

L86HF

CAM MOTOR

CAM+, –

M

M903

DRIVER

SD1, SCK1

R758

CAM MOTOR

TUNER M

VIDEO HEAD

IC501

L56

S100

PB RF, REC RF, C ROT

MODE1-4

ROTARY

SP CH1

SWITCH

JS716

MECHA

VIDEO

L76HF/L86HF

SP CH2

POSITION

REC/PB

AV IN SEL 1, 2

PH100

EP CH1

AMP

SD1, SCK1

SD1, SCK1

T REEL

EP CH2

RF SWP, RF ENV, COMP SYNC

RF SWP, RF ENV, COMP SYNC

FG

PH101

Hi-Fi

S REEL

IC340

FG

AUDIO HEAD

AF REC, AF SWP, AF REC P

AF ENV, AF REC, AF SWP

Q101

CH1

AUDIO

AF REC P,REC P

T SENS

CH2

REC/PB

IC360

AMP

D102

FM PB, FM REC

L76HF/L86HF

Hi-Fi

LINE OUT1 L

CNJ901

LINE1 AUDIO L

IC901

AUDIO

LINE OUT1 R

Q100

LINE-1 IN

L

AMP

PROCESS

S SENS

R

LINE1 AUDIO R

MOD AUDIO

END LED

L76HF/L86HF

IIC DETA, IIC CLK

IIC DATA, IIC CLK

L86HF

AF SWP,AF ENV

IC163 IIC DATA

S101

MF-312 BOARD(2/3)

REC PROOF

L56

EEP

IIC CLK

J481

(SEE PAGE 4-34)

JS364

WRITE CONT

IC162

L

LINE2 AUDIO L

ROM

POWER FAIL

L56

POWER FAIL DET

LINE-2 IN

LINE2 AUDIO R

NORMAL AUDIO

JS719

RESET

RESET PULSE

R

GENERATOR

MF-312 BOARD (3/3)

MAIN/SAP

TUMER L

F MONO

(SEE PAGE 4-34)

TUMER R

US MPX

TA MUTE

IC401

TUNER M

PROCESSOR

SAP DET OUT

REMOCON

REMOTE COMMANDER

IC750

STEREO DET OUT

RECEIVER

L76HF/L86HF

KEY1

FUNCTION

S403

/

KEY

JS301

L56

DM-76 BOARD

A MUTE

KEY2

(SEE PAGE 4-34)

FUNCTION

FUNCTION

KEY

KEY

SW 12V

PS301

IC201

(2/2)

IC420

S IN

AUDIO HEAD

FL

DMS1, 2

REC/PB

NORMAL

NORMAL AUDIO

DRIVER

S OUT

LED

S CLK

AUDIO

ND420

TUNER M

FLD CS

CLICK

PROCESS

FLUORESENT

POWER

T301

HEAD

L86HF

Q301, 302

INDICATOR TUBE

SHUTTLE

ERASE

ERASE

SWITCH

OSC

Q303, 311, 312

JS302 L56

HEAD CONTROL

REC P

SWITCH

L76HF/L86HF

T302

FULL ERASE

ERASE

OSC

05

35V

AC IN

POWER SUPPLY

13V

UNIT

6V

-13V

3-1

3-2