Sony XTV-70 Service manual

(negative ground)

Bus (1) TV antenna (4)

Bus (1)

(5 × 1

/16 × 4 1/4 in.)

(W × H × D)

US Model

Canadian Model

E Model

Australian Model

Chinese Model

Russian Model

MOBILE TV TUNER

9-879-878-01

Sony Corporation

e Vehicle Company Published by Sony Engineering Corporation

XT-V70

1. SERVICING NOTES ................................................ 3

2. GENERAL ................................................................... 4

3. ELECTRICAL ADJUSTMENTS .......................... 7

4. DIAGRAMS

4-1. Block Diagram (Except Russian model) ......................... 9

4-2. Block Diagram (Russian model only) ............................. 10

4-3. Printed Wiring Boards – TV Section (1/2) –

(Except Russian model)................................................... 12

4-4. Printed Wiring Board – TV Section (2/2) –

(Except Russian model)................................................... 13

4-5. Schematic Diagram – TV Section –

(Except Russian model)................................................... 14

4-6. Schematic Diagram – TV Section (1/3) –

(Russian model only)...................................................... 15

4-7. Schematic Diagram – TV Section (2/3) –

(Russian model only)....................................................... 16

4-8. Schematic Diagram – TV Section (3/3) –

(Russian model only)...................................................... 17

4-9. Printed Wiring Boards – TV Section (1/2) –

(Russian model only)....................................................... 18

4-10. Printed Wiring Board – TV Section (2/2) –

(Russian model only)....................................................... 19

5. EXPLODED VIEW ................................................... 27

6. ELECTRICAL PARTS LIST................................ 28

Notes on chip component replacement

• Never reuse a disconnected chip component.

• Notice that the minus side of a tantalum capacitor may be

damaged by heat.

Flexible Circuit Board Repairing

• Keep the temperature of the soldering iron around 270 ˚C

during repairing.

• Do not touch the soldering iron on the same conductor of the

circuit board (within 3 times).

• Be careful not to apply force on the conductor when soldering

or unsoldering.

UNLEADED SOLDER

Boards requiring use of unleaded solder are printed with the leadfree mark (LF) indicating the solder contains no lead. (Caution: Some printed circuit boards may not come printed with

the lead free mark due to their particular size)

: LEAD FREE MARK

Unleaded solder has the following characteristics.

• Unleaded solder melts at a temperature about 40 °C higher

than ordinary solder. Ordinary soldering irons can be used but the iron tip has to be applied to the solder joint for a slightly longer time. Soldering irons using a temperature regulator should be set to about 350 °C. Caution: The printed pattern (copper foil) may peel away if

the heated tip is applied for too long, so be careful!

• Strong viscosity

Unleaded solder is more viscou-s (sticky, less prone to flow) than ordinary solder so use caution not to let solder bridges occur such as on IC pins, etc.

• Usable with ordinary solder

It is best to use only unleaded solder but unleaded solder may also be added to ordinary solder.

SECTION 1

SERVICING NOTES

NOTES ON REPLACEMENT OF SYNC/TV2 BOARDS

To secure the SYNC/TV2 boards, a special bond is required.

Part. No. Description 7-432-912-48 SONY BOND SC608LV

– SYNC board (Russian model) –

If replacing the SYNC board, disconnect the SYNC board from the TV board, and clear off the remaining bond with a cutter, etc. and then apply the bond and install new board. In clearing off the remaining bond with a cutter, take care not to damage the board or mounted parts.

XT-V70

For the bond application locations. (SONY BOND SC608LV)

TV board

IC301

– TV2 board (except Russian model) –

If replacing the TV2 board, disconnect the TV2 board from the TV board, and clear off the remaining bond with a cutter, etc. and then apply the bond and install new board. In clearing off the remaining bond with a cutter, take care not to damage the board or mounted parts.

TV board

For the bond application locations. (SONY BOND SC608LV)

SYNC board

IC403

For the bond application locations. (SONY BOND SC608LV)

C105

C330

C47

TV2 board

C153

For the bond application locations. (SONY BOND SC608LV)

XT-V70

SECTION 2

GENERAL

This section is extracted from instruction manual.

CONTROL IN

AV Center AV Center XAV-A1

AUX 3

VIDEO OUT

TV tuner unit Tuner de télévision XT-V70

CONTROL OUT

RCA interconnects (5 m) 2 Interconnexions RCA (5 m) 2

* To the optional back camera or a video

equipment (to AUX 3).

*A une caméra arrière en option ou un

équipement vidéo (à AUX3).

VIDEO IN

TV tuner unit Tuner de télévision XT-V70

CONTROL OUT

Bus cable (5.3 m) 1 Câble de bus (5,3 m) 1

VIDEO OUT

CONTROL OUT

Connection box XA-123 (supplied with XAV-A1) Boite de raccordement XA-123 (fournie avec XAV-A1)

Available only in the USA. Disponible seulement aux Etats-Unis.

ANT IN

Fuse (0.5 A) Fusible (0,5 A)

AUX 3

AV Center AV Center XAV-A1

XM radio tuner (optional) XM tuner de radio (en option)

Film antenna 5 Antenne film 5

Antenna input cable 6 Câble d’entrée d’antenne 6

TV antenna amplifier unit 4 Amplificateur d’antenne de télévision 4

To a metal surface of the car

Black Noir

Red Rouge

A la surface métallique de la voiture

To the +12 V power terminal which is energized in the accessory position of the ignition key switch. Be sure to connect the black ground lead to it first.

A la borne d’alimentation +12 V traversee par le courant a la position accessoire de la cle de contact. Raccordez-y bien le fil de mise a la terre noir en premier.

Antenna input cable 6 Câble d’entrée d’antenne 6

Power supply point Point d’alimentation

Align the upper edge of the antenna with this line. Aligner l’extrémité supérieure de l’antenne sur cette ligne.

Front pillar Montant avant

Film antenna (left) 5 Antenne film (gauche) 5

Ceramic line Ligne en céramique

Temporary fastener (cellophane tape, etc.) Fixation temporaire (ruban adhésif etc.)

Film antenna (right) 5 Antenne film (droite) 5

XAV-A1

Front pillar Montant avant

Antenna input cable 6 Câble d’entrée d’antenne 6

TV antenna amplifier unit 4 Amplificateur d’antenne de télévision 4

Marking (cellophane tape, etc.) Marque (ruban adhésif etc.)

Front pillar Montant avant

Hook-and-loop fastener 3 Patins adhésifs 3

On installation surface Sur la surface d’installation

XT-V70

Hook-and-loop fastener 3 Patins adhésifs 3

Marking (cellophane tape, etc.) Marque (ruban adhésif etc.)

Peel-off tab Languette d’écaillage

Align the upper edge of the antenna with this line. Aligner le bord supérieur de l’antenne sur cette ligne.

Spray bottle Vaporisateur

Marking (cellophane tape, etc.) Marque (ruban adhésif etc.)

Squeegee 8 Raclette 8

XT-V70

Temporary fastening (cellophane tape, etc.) Fixation temporaire (ruban adhésif etc.)

Power supply point Point d’alimentation

Peel off the protective sheet. Détachez la feuille de protection.

Protective sheet Feuille de protection

Power supply point Point d’alimentation

Roof lining Garniture du toit

Temporary fastening (cellophane tape, etc.) Fixation temporaire (ruban adhésif etc.)

TV antenna amplifier unit 4 Amplificateur d’antenne de téléviseur 4

Peel off the protective sheet. Détachez la feuille de protection.

Antenna input cable (left) 6 Câble d’entrée d’antenne (gauche) 6

Vehicle ACC power supply Alimentation ACC du véhicule

Front pillar Montant avant

Film antenna (left) 5 Antenne film (gauche) 5

Film antenna (right) 5 Antenne film (droite) 5

XAV-A1

TV antenna amplifier unit 4 Amplificateur d’antenne de téléviseur 4

Fold back the floor mat. Retournez le tapis de plancher.

Antenna contacts Contacts d’antenne

Spare contact Contact de rechange

Ground contact Contact de terre

Front pillar Montant avant

Antenna input cable (right) 6 Câble d’entrée d’antenne (droit) 6

Grounding tape 7 (peel off the protective sheet.) Ruban de terre 7 (détachez la feuille de protection.)

Ground contact (peel off the protective sheet.) Contact de terre (détachez la feuille de protection.)

Antenna cord clamp 9 Serre-fils de cordon d’antenne 9

Antenna input cable (right) 6 Câble d’entrée d’antenne (droit) 6

TV antenna amplifier unit 4 Amplificateur d’antenne de téléviseur 4

Antenna cord clamp 9

Serre-fils de cordon d’antenne 9

Antenna cord clamp 0 Serre-fils de cordon d’antenne 0

IMPORTANT CAUTION! Do not route the cable near the pedals! PRECAUTION IMPORTANTE! N’acheminez pas le câble près des pédales!

Antenna input cable (left) 6 Câble d’entrée d’antenne (gauche) 6

XT-V70

Attach the power supply terminal to the film antenna 5 (9)

1 Remove the power supply point protective sheet from the

film antenna (9-1).

The color of the protective sheet is used to distinguish the left and right antennas

The right antenna (as seen from inside the car) has a blue protective sheet, and the left antenna has a white protective sheet. Take care to mount the antennas on the proper side of the car.

2 Attach the antenna input cable 6 to the film antenna power

supply terminals (9-2).

•The same type of cable is used for both the left and right antennas.

•Temporarily fastening the cable near the ground connection with cellophane tape will make the procedure easier.

Connecting to the power supply terminals

Align the protrusions on the power supply terminals with the arrows v on the film antenna and fasten in place.

3 Pass the antenna input cable 6 through the roof lining

(inner roof panel) (9-3).

Notes

• Pull the roof lining down slightly and thread the cable under it.

• Take care not to pull too hard on the lining and bend it out of shape.

• Perform this step while holding on to the power supply point to avoid putting stress on that point.

• Route the antenna input cable carefully to avoid pulling excessively on, applying stress to, or kinking the cable.

Route the antenna input cable 6 (0)

1 Apply the grounding tape 7 to the car body (0-1).

Apply the grounding tape to the metal of the car body, in a position where it can contact the ground contact on the antenna input cable.

Notes

• Carefully wipe away any dirt on the attachment surface.

• Be sure to stick the grounding tape completely to a flat, metal part of the car body. Do not apply the grounding tape to a place that is not flat, or over a clip or screw hole. Do not scrape off the finish on the car body.

2 Affix the ground contact on the antenna input cable to the

grounding tape 7. Peel off the protective sheet from the ground contact and stick it completely to the grounding tape. Make sure that no portion of the ground contact protrudes beyond the grounding tape, and that there is no part of the ground contact which is not firmly stuck to the grounding tape.

3 Route the antenna input cable, using the supplied antenna

cord clamp 9 to hold it in place (0-2, 3, 4). Route the cable so that it will be completely covered when the front pillar molding is replaced.

Important note

Use tape or other fasteners to route the cables such that they cannot interfere with vehicle operation. Do not wrap the cables around the steering column, gear shift lever, brake pedal, etc.

Mount the TV antenna amplifier unit 4 (qa)

1 Mount the TV antenna amplifier unit near the floor in the

foot area in front of the passenger’s seat. (Be sure to wipe away any dirt on the mounting surface.)

Important note

It would be extremely dangerous if the TV antenna amplifier unit were to get stuck underneath the brake pedal. Be sure to mount the amplifier on the passenger’s side.

2 Connect the grounding cable from the TV antenna amplifier

unit to a metal part of the car body where it can make a good ground contact.

3 Connect the antenna input cables to the TV antenna

amplifier unit according to the markings on the amplifier (1, 2, 3, 4, TV).

Connect the TV tuner unit and the car’s ACC power supply (qs)

1 Connect the antenna terminal (L-type) on the TV antenna

amplifier unit 4 to the TV tuner unit.

2 Connect the accessory power supply terminal to the car’s

ACC power supply.

•Connect the ACC power supply cord from the TV tuner unit to the spare contact.

•Do not connect directly to the battery.

Replace the front pillar molding

Fasten cords out of the way (qd)

Alignment marks (protrusions)

Power supply terminals

Alignment marks (arrows v)

Precautions

•This unit is designed for negative ground 12 V DC systems only.

•Do not get the wires under a screw, or caught in moving parts (e.g. seat railing).

•Before making connections, turn the car ignition off to avoid short circuits.

•Connect the red power input leads only after all other leads have been connected.

•Run all ground wires to a common ground point.

Fuse replacement

When replacing the fuse, be sure to use one matching the amperage rating stated on the original fuse. If the fuse blows, check the power connection and replace the fuse. If the fuse blows again after replacement, there may be an internal malfunction. In such a case, consult your nearest Sony dealer.

Connection example (2)

Connection diagram (3)

Installing the TV tuner unit (4)

Notes

• Ensure that the mounting surface is clean.

• Do not install the TV tuner unit – in locations subject to high temperatures. – in locations subject to direct sunlight, warm air from heater

outlets, or other locations that can get hot.

• When attaching the hook-and-loop fastener to the bottom of the TV

tuner unit, do not cover the model name plate in the center.

Keep the units and connection cables apart.

The AV Center main unit, the monitor, TV tuner unit, and RCA interconnects should not be in close proximity. Otherwise noise interference may affect the TV picture.

Mounting the TV antenna

Mount the film antenna 5 to the car and connect the TV tuner unit. For directions on connecting the TV tuner unit, see also

“Connection diagram (3)”.

Before mounting

•It may not be possible to mount the antenna on some cars.

- In cars with glass that does not transmit radio waves (infrared

reflecting glass, insulated glass, glass that is opaque to electromagnetic waves, etc.), the signal reception will be extremely poor.

- The antenna cannot be mounted in cars which have airbags in

the front pillars.

•Mount the antenna to the front window, in the specified location and according to the specified dimensions.

- The supplied film antenna is designed for attaching only to the

front window. If attached to the rear window or elsewhere in the car, the signal reception may be extremely poor.

Notes

• Once you have mounted the film antenna, do not attempt to remove it and attach it again, as the adhesive will be considerably weakened. Be sure to temporarily fasten the cable and antenna in place and check that the cable has sufficient play before permanently attaching.

• During the mounting procedure, it will be necessary to remove the front pillar molding to attach a ground wire. When performing the installation yourself, if you decide it is too difficult to remove the front pillar molding, please contact your dealer for assistance. (Note that your dealer may charge a fee for their assistance.)

Required items

Have the following items handy before beginning the mounting procedure.

•Tools (Philips screwdriver, etc.)

•Cellophane tape

•Scissors

•Spray bottle (fill with 500 ml water and one or two drops of detergent)

•Paper towels

Note

Mount the film antennas to the inside of the front window. Do not mount the antennas anywhere other than the location described here.

Before attaching

Using the supplied cleaning cloth qa to wipe away any oil, wax, or dust tat may be on the window.

Fuse (0.5 A)

TV antenna amplifier unit 4

Mounting position (5)

Installation complete

Film antenna mounting procedure

Check the film antenna 5 mounting position (6)

1 Align the film antenna power supply point with the lower

edge of the window’s ceramic line and fasten temporarily in place with cellophane tape (6-1). Do not remove the adhesive backing from the antenna yet. The figure shows the results of this step, for the left antenna. Temporarily position the right antenna in the same manner.

2 Mark the left and right sides of the film antenna, using

cellophane tape, etc (6-2).

Remove the inner molding from the front pillars on both sides of the front window (7)

The figure shows an example of a car, such as a sedan or SUV, which as a handle mounted on the front pillar.

Notes

• The molding on the front pillar will be fastened in place with clips or screws. When removing it, take care not to damage or deform it.

• When performing the installation yourself, if you decide it is too difficult to remove the front pillar molding, please contact your dealer for assistance. (Note that your dealer may charge a fee for their assistance.)

Attach film antenna 5 (8)

Before attaching

• Remove the film antenna, which you previously fastened temporarily in place, before beginning these steps.

• Cover the dashboard with a cloth to protect it from the water and detergent.

•Clean the front window well to remove any dirt, oil, or anti-fogging agent before beginning these steps.

1 Using a spray bottle, wet the inside of the front window well

with a mild detergent solution. The optimal solution is 500 ml of water with one or two drops of detergent (8-1). (Pure water will not work well for making fine adjustments.)

2 Remove the clear backing from the film antenna. Using the

spray bottle, wet the exposed surface well with the mild detergent solution (8-2).

•Grasp the peel-off tab and peel the clear backing off slowly.

•Do not remove the protective sheet from the other side (the side that faces the inside of the car) yet. You will remove that sheet in step 8-4.

•Take care not to get dirt or fingerprints on the exposed surface of the film antenna.

When attaching the film antenna

• Position the antenna vertically by aligning the upper edge of the antenna with the lower edge of the ceramic line. Position it horizontally by aligning the edges with the marking (cellophane tape, etc.) that you previously placed on the window.

• Do not let the front window get dry as you are working. Spray it again with the detergent solution as needed.

• Until the front window dries, you can slide the antenna to adjust its position.

• When you have the antenna positioned where you want it, remove the markings.

3 Stick the film antenna to the front window (8-3). 4 Use the supplied squeegee 8 to make sure the film antenna is

well attached to the window (8-4).

•Hold the antenna so it does not move while using the squeegee.

•Work from the center of the antenna outward.

•Work the squeegee along the length of the antenna, pushing out air bubbles to obtain a good seal.

•Do not rub the antenna too hard.

Note

Make sure that the film antenna is completely dry before continuing with the mounting procedure. Continuing before the antenna is dry may cause it to come off the window.

5 Use paper towels to wipe away the excess detergent solution

and dry the antenna well. We recommend you let the antenna dry for 3-4 hours. Do not try to rush the drying process by using a hair dryer or other heater. Doing so may damage the film antenna.

Turn over. t

SECTION 3

+ –

TV SSG

CONTROL OUT

connector

(CP101)

Regulated

Power Supply

14.4V

XAV-A1

XT-V70

GND

B+

ANT IN 1 jack

(JK11)

Center-tap

of SVR31

oscilloscope

(DC range)

ELECTRICAL ADJUSTMENTS

XT-V70

AUDIO OUTPUT LEVEL ADJUSTMENT

Setting:

ANT IN 1 jack

(JK11)

TV SSG

Regulated

Power Supply

14.4V

XT-V70

XAV-A1

B+

GND

Procedure:

1. Connect the XT-V70 to the XAV-A1 and turn the power on.

2. Set the TV mode and set the reception channel to the VHF band 2ch (except Russian models) or the VHF band 1ch (Russian model).

3. Connect a TV SSG to the ANT IN 1 (JK11) jack on the TV board and input following color bar signal.

US, Canadian and E (NTSC) models:

USA 2 ch, 60 dBuvemf, MONO signal (f.v: 55.25 kHz, f.a: 59.75 kHz, 25kHzdev. 400 Hz)

Australian, Chinese and E (PAL) models:

CHINA 2 ch, 60 dBuvemf, MONO signal (f.v: 55.75 kHz, f.a: 64.25 kHz, 50kHzdev. 400 Hz)

Russian model:

OIR 1 ch, 60 dBuvemf, MONO signal (f.v: 49.75 kHz, f.a: 56.25 kHz, 50kHzdev. 400 Hz)

4. Connect a digital voltmeter to the TP51B on the TV board.

5. Adjust the SVR100 (except Russian models) or SVR221 (Russian model) on the TV board so that the value of digital voltmeter becomes 700 mV ± 10 mV.

TP51B

digital

voltmeter

CONTROL OU

connector

(CP101)

VIDEO OUTPUT LEVEL ADJUSTMENT (Russian model only)

Setting:

Procedure:

1. Connect the XT-V70 to the XAV-A1 and turn the power on.

2. Set the TV mode and set the reception channel to the VHF band 1ch.

3. Connect a TV SSG to the ANT IN 1 (JK11) jack on the TV board and input white (100%) signal.

4. Set the TV-RF output to the 60 dBuv.

5. Connect a oscilloscope to the center-tap of SVR31 on the TV board.

6. Adjust the SVR31 on the TV board so that the value of oscilloscope becomes 1 Vp-p ± 0.5 Vp-p.

Adjustment and Connection Location: TV board

(See page 8)

Adjustment and Connection Location: TV board

(See page 8)

DIVERSITY VCO ADJUSTMENT

Setting:

frequency counte

TV board

IC11 or IC81 pin

Procedure:

1. Connect the XT-V70 to the XAV-A1 and turn the power on.

2. Connect the U1 or U2 to the GND on the TV board to set the test mode.

3. Connect a frequency counter to the IC11 (except Russian models) or IC81 (Russian model) pin 7 on the TV board.

4. Adjust the CT11 (except Russian models) or CT81 (Russian model) on the TV board so that the value of frequency counter becomes 15.73 kHz ± 0.2 kHz (NTSC) or 15.62 kHz ± 0.2 kHz (PAL).

Adjustment and Connection Location: TV board

+ –

(See page 8)

XT-V70

Adjustment and Connection Location:

Except Russian model

– TV Board (Component Side) –

CT11

Diversity VCO

Adjustment

11224

IC11

Russian model only

– TV Board (Conductor Side) –

TP51B

SVR100

Audio Output Level

Adjustment

– TV Board (Component Side) –

SVR221

Audio Output Level

Adjustment

CT81

Diversity VCO

Adjustment

11224

IC81

SVR31

Video Output Level

Adjustment

– TV Board (Conductor Side) –

TP51B

SECTION 4

DIAGRAMS

4-1. BLOCK DIAGRAM (Except Russian model)

XT-V70

ANT IN

JK11

JK12

JK13

JK14

DIVERSITY ANTENNA

CONTROL

IC11

• SIGNAL PATH : AUDIO

: VIDEO

CT11

DIVERSITY

VCO

12 1011 9 13 1514 16

ANT4

ANT3

ADET4

CREF

ADET3

ADET2

ADET1

ANT2

VIDEO IN

(E (PAL), Australian, Chinese)

TV TUNER

RF IN

VIDEO OUT2

NICAM SW

SCL

341213

SCL

TU11

SDA

AUDIO

OUT

VIDEO

OUT1

SMETER

SD OUT

SMETER

SYSTEM CONTROLLER

IC151

X151 6MHz

BUFFER

Q15

NOISE

CANCELLER

IC1

X91

500kHz

ANTENNA

SWITCH

D11-14

ANT1

NICAM SWITCH

BUFFER

Q12

Q13, Q14

56 49 13 32 30 29

SW1

SW2

AUDIO OUTPUT

VIDEO OUTPUT

LEVEL

VCO IN

VCO OUT

SVR100

LEVEL

VIDEO IN

DET OUT

VSD

SYNC

DETECT

IC91

AUDIO_OFF

V_CONT1 V_CONT2

MUTE J1850+B J1850AD

J1850CLK

J1850RX J1850TX

J1850INT

J1850RES

RESET

POWER

BATT

BUFFER

Q56

51 44

54 55

23 21 20 19 18 46 22

AUDIO SWITCH

HIGH-PASS

FILTER

IC51 (1/2)

AUDIO_OFF

MUTE

V-CONT1 V-CONT2

AUDIO_OFF

CE V_CONT1 V_CONT2

MUTE

J1850AD J1850CLK J1850RX J1850TX J1850INT J1850RES

BATTERY DETECT

IC102

LOW-PASS

FILTER

IC51 (2/2)

LEVEL SHIFT

Q51, 52

ACCESSORY

J1850AD J1850CLK J1850RX J1850TX J1850INT J1850RES

J-BUS B+

DETECT

Q107

IC52

4 1

MUTING CONTROL

Q54

ACCESSORY

CHECK

Q105, 106

VIDEO SWITCH

IC53

VIN1 VOUT

SW1

2 4

15 16 20 21 22 23

B+ SWITCH

VIN2

CTL3

J-BUS CONTROL

IC181

OSC1 OSC0

BO–

CLK RX

BUS–

BUS+

INT RES

BO+

Q551, 552

VDD

RESET

IC182

REGULATOR

3 2

+8V

IC103

+5V

IC104

13 14

3 4

MUTING

Q53, 59

DZ102

DZ103

X181

10MHz

BUS DRIVER

Q183

BUS DRIVER

Q184

D101

+5.3V

REGULATOR

IC101

B+ SWITCH

Q103, 104

CP101

LCH

RCH

10 11

1 2

CP102

7 8

9 10

1 2

CP51

BU ACC

BUS– BUS+

LCH

RCH

BU BU

ACC

BUS– BUS+

OUT

CONTROL

VIDEO

XT-V70

4-2. BLOCK DIAGRAM (Russian model only)

ANT IN

JK11

JK12

JK13

JK14

DIVERSITY ANTENNA

CONTROL

IC81

• SIGNAL PATH

CT81

DIVERSITY

VCO

: AUDIO

: VIDEO

12 1011 9 13 1514 16

ANT4

ANT3

ADET4

CREF

ADET3

ADET2

ADET1

ANT2

VIDEO IN

ANT1

ANTENNA

SWITCH

D11-14

BUFFER

Q81

TV TUNER

TU31

RF IN

VIDEO OUT2

SCL

SDA

341213

49 13 32 30 29

SCL

SDA

AUDIO

OUT

VIDEO

OUT1

SMETER

SD OUT

SMETER

BUFFER

X451

500kHz

Q31

SVR31

VIDEO OUTPUT

LEVEL

VIDEO IN

VCO IN

VCO OUT

DET OUT

SYSTEM CONTROLLER

SVR221

AUDIO OUTPUT

LEVEL

NOISE

CANCELLER

IC201

SECAM DECODER

IC301

TV IN

X301

4.43361MHz

XTAL

SYNC

DETECT

IC451

VSD

IC501

X501 6MHz

INT MON

FSC OUT

SDA27SCL

SSCL

SSDA

EEPROM

IC401

AUDIO_OFF

V_CONT1 V_CONT2

MUTE

J1850+B

J1850AD

J1850CLK

J1850RX J1850TX

J1850INT

J1850RES

RESET

POWER

BATT

BUFFER

Q221

RGB-TV ENCODER

2 3 4

51 44

54 55

23 21 20 19 18 46 22

RIN GIN BIN

SYNCIN

FSCIN

IC403

VOUT

BATTERY DETECT

HIGH-PASS

FILTER

IC221 (1/2)

AUDIO_OFF

V_CONT1 V_CONT2

MUTE

IC603

J1850AD

J1850CLK

J1850RX

J1850TX

J1850INT

J1850RES

LOW-PASS

IC221 (2/2)

LEVEL SHIFT

MUTE

V-CONT1 V-CONT2

FILTER

Q254, 255

ACCESSORY

J1850AD J1850CLK J1850RX J1850TX J1850INT J1850RES

J-BUS B+

DETECT

Q655

AUDIO SWITCH

IC251

4 1

MUTING CONTROL

Q253

ACCESSORY

VIDEO SWITCH

IC452

VIN1 VOUT

SW1

CTL3

J-BUS CONTROL

IC551

CLK

INT

RES

B+ SWITCH

Q551, 552

RESET

IC502

CHECK

Q653, 654

VIN2

OSC1 OSC0

BO–

BUS– BUS+

BO+

VDD

REGULATOR

IC651

REGULATOR

IC652

+8V

+5V

CP702

CP701

CP452

LCH

RCH

10 11

1 2

7 8

9 10

1 2

BU ACC

BUS– BUS+

LCH

RCH

BU BU

ACC

BUS– BUS+

OUT

CONTROL

VIDEO

3 2

MUTING

Q251, 252

DZ652

13 14

3 4

DZ653

X551

10MHz

BUS DRIVER

Q554

BUS DRIVER

Q553

D601

+5.3V

REGULATOR

IC602

B+ SWITCH

Q651, 652

XT-V70

1010

XT-V70

Note on Printed Wiring Boards:

• X : parts extracted from the component side.

• Y : parts extracted from the conductor side.

• x : parts mounted on the conductor side.

• : Carbon pattern.

(The other layers' patterns are not indicated.)

Caution: Pattern face side: Parts on the pattern face side seen from (Conductor Side) the pattern face are indicated. Parts face side: Parts on the parts face side seen from (Component Side) the parts face are indicated.

Note on Schematic Diagram:

• All capacitors are in µF unless otherwise noted. (p: pF) 50 WV or less are not indicated except for electrolytics and tantalums.

• All resistors are in Ω and 1/

• C : panel designation.

• H : adjustment for repair.

• Power supply is supplied from the AV Center (XA V -A1) in TV model.

• Voltages and waveforms are dc with respect to ground under no-

signal conditions. no mark : TV

• Voltages are taken with a VOM (Input impedance 10 MΩ). Voltage variations may be noted due to normal production tolerances.

• Waveforms are taken with a oscilloscope. Voltage variations may be noted due to normal production tolerances.

• Circled numbers refer to waveforms.

• Signal path.

F : AUDIO L : VIDEO

• Abbreviation AUS: Australian model CH : Chinese model CND : Canadian model RU : Russian model

W or less unless otherwise specified.

• Waveforms

– TV Board – (except Russian model) – TV Board – (Russian model only)

IC11 4 (CREF)

500 mV/DIV, 5 µs/DIV

IC151 ra (X1)

IC181 qd (OSC1)

2 Vp-p

2.6 µs

4.2 Vp-p

166 ns

1 V/DIV, 100 ns/DIV

IC81 4 (CREF)

2.6 µs

500 mV/DIV, 5 µs/DIV

IC301 ef (XTAL)

224 ns

200 mV/DIV, 200 ns/DIV

IC451 qa (VCO OUT)

2 Vp-p

500 mVp-p

2 V/DIV, 200 ns/DIV

IC91 qa (VCO OUT)

2 µs

500 mV/DIV, 5 µs/DIV

100 ns

5.1 Vp-p

1.5Vp-p

500 mV/DIV, 5 µs/DIV

IC501 ra (X1)

IC551 qd (OSC1)

1.4Vp-p

2 µs

4.3 Vp-p

167 ns

1 V/DIV, 100 ns/DIV

5.2 Vp-p

100 ns

2 V/DIV, 200 ns/DIV

XT-V70

1111

+ 25 hidden pages

Sony XTV-70 Service manual

TABLE OF CONTENTS

SERVICING NOTES

GENERAL

ELECTRICAL ADJUSTMENTS

DIAGRAMS

4-1. BLOCK DIAGRAM (Except Russian model)

4-2. BLOCK DIAGRAM (Russian model only)