SLV-LX40MX, SLV-LX50CL, SLV-LX50CS, SLV-LX50MX, SLV-LX50PA, SLV-LX50PC, SLV-LX50VZ, SLV-LX60SMX, SLV-LX70SCL, SLV-LX70SCS, SLV-LX70SMX, SLV-LX70SPA, SLV-LX70SPC, SLV-LX70SVZ - Sony VCR Service Manual (repair manual)

Chilean Model

SLV-LX50CL/LX50CS/LX70SCL/

LX70SCS

Mexican Model

SLV-LX40MX/LX50MX/LX60SMX/

LX70SMX

Panama Model

Venezuelan Model

SLV-LX50PA/LX50PC/LX50VZ/

LX70SPA/LX70SPC/LX70SVZ

S MECHANISM

HiFi model : SLV-LX60S/LX70S
Mono model: SLV-LX40/LX50

Format

VHS NTSC standard

Video recording system

Rotary head helical scanning FM system

Video heads

Double azimuth four heads

Video signal

NTSC color, EIA standards

Tape speed

SP: 33.35 mm/s

EP: 11.11 mm/s

LP: 16.67 mm/s,

playback only

Maximum recording/playback time

9 hrs. in EP mode (with T-180 tape)

Fast-forward and rewind time

Approx. 3 min. (with T-120 tape)

Channel coverage

VHF 2 to 13

UHF 14 to 69

CATV A-8 to A-1, A to W, W+1 to W+84

Antenna

75-ohm antenna terminal for VHF/UHF

LINE-1 IN and -2 IN

VIDEO IN, phono jack (1 each)

Input signal: 1 Vp-p, 75 ohms, unbalanced, sync

negative

AUDIO IN, phono jacks (1 each) (SLV-LX50
and LX40), (2 each) (SLV-LX70S and LX60S)

Input level: 327 mVrms

Input impedance: more than 47 kilohms

LINE OUT

VIDEO OUT, phono jack (1)

Output signal: 1 Vp-p, 75 ohms, unbalanced,
sync negative

AUDIO OUT, phono jacks (1 each) (SLV-LX50
and LX40), (2 each) (SLV-LX70S and LX60S)

Standard output: 327 mVrms

Load impedance: 47 kilohms

Output impedance: less than 10 kilohms

Clock

Quartz locked

Timer indication

12-hour cycle

Timer setting

8 programs (max.)

Power back-up

Built-in self-charging capacitor

Back-up duration: up to 8 hours at a time

Power requirements

110 V AC to 240 V AC, 50/60 Hz

(SLV-LX70S (CL/CS) and LX50 (CL/CS))

120 V AC, 60 Hz

(SLV-LX70S (MX/PA/PC/VZ), LX60S (MX),

LX50 (MX/PA/PC/VZ), and LX40 (MX))

Power consumption

17 W

(SLV-LX70S (CL/CS/MX/PA/PC/VZ) and

SLV-LX60S (MX))

16 W

(SLV-LX50 (CL/CS/MX/PA/PC/VZ) and

SLV-LX40 (MX))

Operating temperature

5°C to 40°C (41°F to 104°F)

Storage temperature

–20°C to 60°C (–4°F to 140°F)

Dimensions

Approx. 355 x 

 

96 x 288.8 mm (w/h/d)

including projecting parts and controls

Mass

Approx. 3.6 kg

Remote commander (1)

Size AA (R6) batteries (2)

75-ohm coaxial cable with F-type connectors (1)

Audio/video cable (1) (3-phono to 3-phono)
(SLV-LX70S and LX60S only)

Plug adaptor (1)
(SLV-LX70S (CL/CS) and LX50 (CL/CS) only)

Design and specifications are subject to change
without notice

ENERGY STAR

®

 is a U.S. registered mark.

As an ENERGY STAR

®

 Partner, Sony Corporation

has determined that this product meets the
ENERGY STAR

®

g

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SLV-LX70S

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-soldered
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.

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.

1.

ERROR CODE INDICATION ........................................... 5

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

Step 2 : Setting up the remote commander ............................. 1-1
Step 3 : Hookups ..................................................................... 1-1
Selecting a language ............................................................... 1-4
Setting the clock ...................................................................... 1-4
Presetting channels .................................................................. 1-6

Basic Operations ........................................................................ 1-8

Playing a tape .......................................................................... 1-8
Recording TV programs .......................................................... 1-8
Recording TV programs using the Dial Timer ........................ 1-9
Recording TV programs using the Timer ............................. 1-10

Additional Operations ............................................................. 1-11

Locking the VCR (Child Lock) ............................................. 1-11
Playing/searching at various speeds ...................................... 1-11
Setting the recording duration time ....................................... 1-12
Checking/changing/canceling timer settings ........................ 1-12
Recording stereo and bilingual programs ............................. 1-13
Searching using for the begining of a timer recorded

program ......................................................................... 1-13

Searching using the index function ....................................... 1-13
Searching using the time search function ............................. 1-14
Skip-searching automatically (Quick view) .......................... 1-14
Searching for a selected point on the tape ............................ 1-14
Adjusting the picture ............................................................. 1-15
Changing menu options ........................................................ 1-15
Editing with another VCR ..................................................... 1-16

Additional Information ............................................................ 1-16

General setup information ..................................................... 1-16
Index to parts and controls .................................................... 1-18

2-1.

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

2-2.

DI-80 BOARD, FJ-32BOARD ........................................ 2-1

2-3.

REAR PANEL ................................................................. 2-2

2-4.

MA-405 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 BLOCK DIAGRAM ..... 3-5

3-4.

TUNER BLOCK DIAGRAM ......................................... 3-7

3-5.

AUDIO BLOCK DIAGRAM .......................................... 3-9

3-6.

POWER BLOCK DIAGRAM ....................................... 3-11

4-1.

FRAME SCHEMATIC DIAGRAM ................................ 4-3

4-2.

PRINTED WIRING BOARDS AND SCHEMATIC
DIAGRAMS .................................................................... 4-5

• MA-405 (VIDEO, AUDIO, SERVO/SYSTEM

CONTROL, TUNER, POWER)

PRINTED WIRING BOARD ......................... 4-5

• MA-405 (1/7)(REC/PB HEAD AMP)

SCHEMATIC DIAGRAM .............................. 4-7

• MA-405 (2/7)(Y/C, AUDIO PROCESS)

SCHEMATIC DIAGRAM .............................. 4-9

• MA-405 (3/7)(SERVO/SYSTEM CONTROL)

SCHEMATIC DIAGRAM ............................ 4-11

• MA-405 (4/79)(AUDIO PROCESS)

SCHEMATIC DIAGRAM ............................ 4-13

• MA-405 (5/7)(TUNER)

SCHEMATIC DIAGRAM ............................ 4-15

• MA-405 (6/7)(DISPLAY CONTROL)

SCHEMATIC DIAGRAM ............................ 4-17

• MA-405 (7/7)(POWER SUPPLY)

SCHEMATIC DIAGRAM ............................ 4-19

• FJ-32 (LINE-2 IN)

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

• DI-80 (DIAL TIMER)

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

5-1.

SYSTEM CONTROL — MECHANISM BLOCK
INTERFACE (MA-405 BOARD IC160) ....................... 5-1

5-2.

SYSTEM CONTROL — SERVO PERIPHERAL
CIRCUIT INTERFACE (MA-405 BOARD IC160) ...... 5-1

5-3.

SYSTEM CONTROL — SYSTEM CONTROL
PERIPHERAL CIRCUIT INTERFACE
(MA-405 BOARD IC160) .............................................. 5-2

5-4.

SYSTEM CONTROL AND RF MODULATOR
— INPUT SELECTION BLOCK INTERFACE
(MA-405 BOARD IC160) .............................................. 5-2

5-5.

SYSTEM CONTROL — VIDEO/RP BLOCK
INTERFACE (MA-405 BOARD IC160) ....................... 5-2

5-6.

SYSTEM CONTROL — AUDIO BLOCK INTERFACE
(MA-405 BOARD IC160) .............................................. 5-2

5-7.

SERVO/SYSTEM CONTROL MICROPROCESSOR
PIN FUNCTIONS (MA-405 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-405  Board) ...................... 6-2
2-3. SERVO SYSTEM CHECK ............................................. 6-3
2-3-1. RF Switching Position Adjustment (MA-405 Board) ... 6-3
2-4. AUDIO SYSTEM ADJUSTMENT ................................. 6-3
2-4-1. Hi-Fi Audio System Adjustment (Hi-Fi model only) ... 6-3
2-4-2. HiFi Switching Position Adjustment (MA-405 Board) 6-4
2-4-3. Normal Audio System Adjustment ............................... 6-4
2-4-4. Audio Level and Distortion Check ............................... 6-4
2-4-5. Audio Noise Check ....................................................... 6-4
2-4-6. ACE Head Adjustment .................................................. 6-4
2-4-7. E-E Output Level Check ............................................... 6-4
2-4-8. 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

Section

Title

Page

Section

Title

Page

• 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

Mode code indication when the error has occurred.

Error code