Sony TRINITRON KV-29FV16A Bedienungsanleitung

TRINITRON®COLOR TELEVISION

SERVICE MANUAL

AA-2W

CHASSIS

KV-29FV16A

RM-Y171 Argentina SCC-S34P-A

KV-29FV16A

9-965-908-01

MODEL NAME REMOTE COMMANDER DESTINATION CHASSIS NO.

RM-Y171

— 2 —

KV-29FV16A

TABLE OF CONTENTS

Speciﬁcations..................................................................................................................................... 3

Warnings and Cautions...................................................................................................................... 4

Safety Check-out ............................................................................................................................... 5

1. Disassembly

1-1. Rear Cover Removal ................................................................................................................. 6

1-2. Chassis Assembly Removal ...................................................................................................... 6

1-3. Service Position ......................................................................................................................... 6

1-4. Multi-Button Switch Removal..................................................................................................... 6

1-5. Picture Tube Removal ............................................................................................................... 7

Anode Cap Removal Procedure ........................................................................................................ 7

2. Set-up Adjustments

2-1. Beam Landing ............................................................................................................................ 8

2-2. Convergence .............................................................................................................................. 9

2-3. Focus.........................................................................................................................................11

2-4. Screen (G2) ...............................................................................................................................11

2-5. White Balance Adjustments.......................................................................................................11

3. Safety Related Adjustments

3-1. Hold Down Conﬁrmation........................................................................................................... 12

3-2. B+ Voltage Conﬁrmation and Adjustment ................................................................................. 12

4. Circuit Adjustments

4-1. Setting the Service Adjustment Mode......................................................................................13

4-2. Memory Write Conﬁrmation Method ........................................................................................ 13

4-3. Remote Adjustment Buttons and Indicators............................................................................. 13

4-4. A Board Adjustments ............................................................................................................... 19

5. Diagrams

5-1. Circuit Board Location ............................................................................................................. 21

5-2. Printed Wiring Boards and Schematic Diagrams..................................................................... 21

5-3. Diagrams

Block Diagram ......................................................................................................................... 22

A Board .................................................................................................................................... 24

AK Board ................................................................................................................................. 27

C Board.................................................................................................................................... 29

HB Board ................................................................................................................................. 30

HZ Board ................................................................................................................................. 30

HA Board ................................................................................................................................. 31

HX Board ................................................................................................................................. 31

GA Board ................................................................................................................................. 32

UY Main Board ........................................................................................................................ 35

UY PIP Board........................................................................................................................... 36

WA Board................................................................................................................................. 40

5-4. Semiconductors ....................................................................................................................... 42

6. Exploded Views

6-1. Chassis..................................................................................................................................... 43

6-2. Picture Tube Removal .............................................................................................................. 44

7. Electrical Parts List .................................................................................................................................. 45

SECTION TITLE PAGE

— 3 —

KV-29FV16A

(

•

) SRS (SOUND RETRIEVAL SYSTEM)

The (

•

) SRS (SOUND RETRIEVAL SYSTEM) is manufactured by Sony

Corporation under license from SRS Labs, Inc. It is covered by U.S.

Patent No. 4,748,669. Other U.S. and foreign patents pending.

The word ‘SRS’ and the SRS symbol (

•

) are registered trademarks of

SRS Labs, Inc. BBE and BBE symbol are trademarks of BBE Sound, Inc.

and are licensed by BBE Sound, Inc. under U.S. Patent No. 4,638,258

and 4,482,866.

Television system

NTSC/PAL-M/PAL-N Color System

Channel coverage

VHF: 2-13/ VHF: 14-69/ CATV: 1-125

Picture tube

Flat Trinitron®tube

Visible screen size

27-inch picture measured diagonally

Actual screen size

29-inch measured diagonally

Antenna

75 ohm external terminal for VHF/UHF

Supplied Accessories

Remote Control RM-Y171

Battery size AA (R6) w/2

Optional Assessories

Connecting Cables:

RK-74A, VMC-810/820830hg, VMC-10HG/30HG,

VMC-720M, VMC-810S/820S, YC-15V/30V,

YC-15/30HG, RK-G69HG, RKC-515HG

AV Cable: VMC-810/820/830 HG

Audio Cable: RKC-515HG

S-LINK Cable: RK-G69HG

Component Video Cable: VMC-10/30 HG

TV Stand: SU-32FD2, SU-36FD2, SU-32XBR2, SU-36XBR2

UV Mixer: EAC-66

SPECIFICATIONS

Design and speciﬁcations are subject to change without notice.

KV-29FV16A

120-220V, 50/60Hz

YES

15W x 2

205W

762 x 604 x 519 mm

30 x 23

7/8

x 20

1/2

49 kg

110 lbs

1) 1 Vp-p 75 ohms unbalanced, sync negative

2) Y: 1 Vp-p 75 ohms unbalanced, sync negative

C: 0.286 Vp-p (Burst signal), 75 ohms

3) Y: 1.0 Vp-p, 75 ohms, sync negative;

PB: 0.7 Vp-p, 75 ohms; PR: Vp-p, 75 ohms

4) 500

Vrms (100% modulation), Impedance: 47 kilohms

5) More than 408 mVrms at the maximum volume setting (variable)

More than 408 mVrms (ﬁx); Impedance (output): 2 kilohms

Power Requirements

Number of Inputs/Outputs

Video

S Video

Y,PB, PR

Audio

Audio Out

Monitor Out

S-Link

Speaker Output (W)

Power Consumption (W)

In Use (Max)

In Standby

Dimensions (W x H x D)

Mass

lbs

— 4 —

KV-29FV16A

WARNINGS AND CAUTIONS

CAUTION

Short circuit the anode of the picture tube and the anode cap to the metal chassis, crt shield, or carbon painted on the crt, after

removing the anode.

WARNING!!

An isolation transformer should be used during any service to avoid possible shock hazard, because of live chassis. The chassis of

this receiver is directly connected to the ac power line.

! SAFETY-RELATED COMPONENT WARNING!!

Components identiﬁed by shading and

mark on the schematic diagrams, exploded views, and in the parts list are critical for

safe operation. Replace these components with sony parts whose part numbers appear as shown in this manual or in supplements

published by sony. Circuit adjustments that are critical for safe operation are identiﬁed in this manual. Follow these procedures

whenever critical components are replaced or improper operation is suspected.

ATTENTION!!

Apres avoir deconnecte le cap de l’anode, court-circuiter l’anode du tube cathodique et celui de l’anode du cap au chassis metallique

de l’appareil, ou la couche de carbone peinte sur le tube cathodique ou au blindage du tube cathodique.

Aﬁn d’eviter tout risque d’electrocution provenant d’un chássis sous tension, un transformateur d’isolement doit etre utilisé lors de tout

dépannage. Le chássis de ce récepteur est directement raccordé à l’alimentation du secteur.

! ATTENTION AUX COMPOSANTS RELATIFS A LA SECURITE!!

Les composants identiﬁes par une trame et par une marque

sur les schemas de principe, les vues explosees et les listes de

pieces sont d’une importance critique pour la securite du fonctionnement. Ne les remplacer que par des composants sony dont

le numero de piece est indique dans le present manuel ou dans des supplements publies par sony. Les reglages de circuit dont

l’importance est critique pour la securite du fonctionnement sont identiﬁes dans le present manuel. Suivre ces procedures lors de

chaque remplacement de composants critiques, ou lorsqu’un mauvais fonctionnement suspecte.

— 5 —

KV-29FV16A

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 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

touching high-wattage resistors.

3. Check that all control knobs, shields, covers, ground straps, and

mounting hardware have been replaced. Be absolutely certain that

you have replaced all the insulators.

4. Look for unauthorized replacement parts, particularly transistors,

that were installed during a previous repair. Point them out to the

customer and recommend their replacement.

5. Look for parts which, though functioning, show obvious signs of

deterioration. Point them out to the customer and recommend their

replacement.

6. Check the line cords for cracks and abrasion. Recommend the

replacement of any such line cord to the customer.

7. Check the B+ and HV to see if they are speciﬁed values. Make sure

your instruments are accurate; be suspicious of your HV meter if sets

always have low HV.

8. 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 0.5 mA (500 microamperes). Leakage current

can be measured by any one of three methods.

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

RCA WT-540A. Follow the manufacturers’ instructions to use these

instructions.

2. A battery-operated AC 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-operated AC voltmeter. The “limit” indication is 0.75 V,

so analog meters must have an accurate low voltage scale. The

Simpson’s 250 and Sanwa SH-63TRD are examples of passive

VOMs that are suitable. Nearly all battery-operated digital multimeters

that have a 2 VAC range are suitable (see Figure A).

How to Find a Good Earth Ground

A cold-water pipe is a guaranteed earth ground; the cover-plate retaining

screw on most AC outlet boxes is also at earth ground. If the retaining

screw is to be used as your earth ground, verify that it is at ground

by measuring the resistance between it and a cold-water pipe with an

ohmmeter. The reading should be zero ohms.

If a cold-water pipe is not accessible, connect a 60- to 100-watt trouble-

light (not a neon lamp) between the hot side of the receptacle and the

retaining screw. Try both slots, if necessary, to locate the hot side on the

line; the lamp should light at normal brilliance if the screw is at ground

potential (see Figure B).

Figure A. Using an AC voltmeter to check AC leakage. Figure B. Checking for earth ground.

— 6 —

KV-29FV16A

1-1. REAR COVER REMOVAL 1-2. CHASSIS ASSEMBLY REMOVAL

SECTION 1: DISASSEMBLY

Twelve Screws

(BVTP 4 x 16)

Two Screws

(BVTP 3 x 12)

AK Board

HA Board

GA Board

A Board

Chassis Asse bly

UY Board

HB Board

Claw

HZ Board

Top Multi-Button Switch

Two Screws

(+BVTP 4x16)

Botto Multi-Button Switch

A Board

GA Board

AK Board

1-3. SERVICE POSITION 1-4. MULTI-BUTTON SWITCH REMOVAL

— 7 —

KV-29FV16A

1. Discharge the anode of the CRT and remove the anode cap.

2. Unplug all interconnecting leads from the deﬂection yoke, neck

assembly, degaussing coils and CRT grounding strap.

3. Remove the C Board from the CRT.

4. Remove the chassis assembly.

5. Loosen the neck assembly ﬁxing screw and remove.

6. Loosen the deﬂection yoke ﬁxing screw and remove.

7. Place the set with the CRT face down on a cushion and remove the

degaussing coil holders.

8. Remove the degaussing coils.

9. Remove the CRT grounding strap and spring tension devices.

10. Unscrew the four CRT ﬁxing screws [located on each CRT corner]

and remove the CRT [Take care not to handle the CRT by the

neck].

1-5. PICTURE TUBE REMOVAL

WARNING: BEFORE REMOVING THE ANODE CAP

High voltage remains in the CRT even after the power is disconnected. To avoid electric shock,

discharge CRT before attempting to remove the anode cap. Short between anode and CRT

coated earth ground strap.

ANODE CAP REMOVAL PROCEDURE

WARNING: High voltage remains in the CRT even after the power is disconnected. To avoid electric shock, discharge CRT before attempting to remove

the anode cap. After removing the anode cap, short circuit to either the metal chassis, CRT shield, or carbon painted on the CRT.

REMOVAL PROCEDURES

Anode Button

Turn up one side of the rubber cap

inthe direction indicated by arrow a .

Use your thumb to pull the rubber

cap ﬁrmly in the direction indicated

by arrow b .

When one side of the rubber cap separates from

the anode button, the anode cap can be removed

by turning the rubber cap and pulling it in the

direction of arrow c .

HOW TO HANDLE AN ANODE CAP

1. Do not use sharp objects which may cause damage to the surface of the anode

cap.

2. To avoid damaging the anode cap, do not squeeze the rubber covering too hard.

A material ﬁtting called a shatter-hook terminalis built into the rubber.

3. Do not force turn the foot of the rubber cover. This may cause the shatter-hook

terminal to protrude and damage the rubber.

— 8 —

KV-29FV16A

The following adjustments should be made when a complete

realignment is required or a new picture tube is installed.

These adjustments should be performed with rated power supply

voltage unless otherwise noted.

The controls and switch should be set as follows unless otherwise

noted:

PICTURE CONTROL: normal

BRIGHTNESS CONTROL: normal

SECTION 2: SET-UP ADJUSTMENTS

Perform the adjustments in order as follows:

1. Beam Landing

2. Convergence

3. Focus

4. Screen (G2)/White Balance

Test Equipment Required:

1. Color Bar Pattern Generator

2. Degausser

3. DC Power Supply

4. Digital Multimeter

5. Oscilloscope

6. CRT Analyzer

2-1. BEAM LANDING

Preparation:

• Input a white pattern signal.

• Face the picture tube in an East or West direction to reduce the

inﬂuence of geomagnetism.

NOTE: Do not use the hand degausser; it magnetizes the CRT .

1. Input white pattern from pattern generator.

2. Loosen the deﬂection yoke mounting screw, and set the purity control

to the center as shown below:

3. Input green pattern from pattern generator.

4. Move the deﬂection yoke backward, and adjust with the purity control

so that green is in the center and red and blue are even on both

sides.

Blue Red

Green

5. Move the deﬂection yoke forward, and adjust so that the entire screen

becomes green.

6. Switch over the raster signal to red and blue and conﬁrm the

condition.

7. When the position of the deﬂection yoke is determined, tighten it with

the deﬂection yoke mounting screw.

8. When landing at the corner is not right, adjust by using the disk

magnets.

Purity control

corrects this area.

Disk magnets or

rotatable disk

magnets correct

these areas(a-d).

Deflection yoke positioning

corrects these areas.

— 9 —

KV-29FV16A

2-2. CONVERGENGE

Preparation:

• Perform FOCUS, V. LIN and V. SIZE adjustments.

• Set BRIGHTNESS control to minimum.

• Input dot pattern.

RV.STAT

Magnet

Center dot

VERTICAL AND HORIZONTAL STATIC

CONVERGENCE

1. Adjust V. STAT magnet to converge red, green and blue dots in the

center of the screen (Vertical movement).

Tilt the V. STAT magnet and adjust static convergence to open or

close the V. STAT magnet.

2. When the V. STAT magnet is moved in the direction of arrow aand

, red, green, and blue dots move as shown below:

RG B

BG R

OPERATION OF BMC (HEXAPOLE) MAGNET

The respective dot positions resulting from moving each magnet interact,

so perform adjustment while tracking.

1 Use the V.STAT tabs to adjust the red, green, and blue dots so they

line up at the center of the screen (move the dots in a horizontal

direction).

RG B RGB RGB

RGB

RGB R GB

Y SEPARATION AXIS CORRECTION MAGNET

ADJUSTMENT

1. Input cross-hatch pattern, adjust PICTURE to minimum and

BRIGHTNESS to normal.

2. Adjust the deﬂection yoke upright so it touches the CRT.

3. Adjust so that the Y separation axis correction magnet on the neck

assembly is symmetrical from top to bottom (open state).

Purity

V. STAT

BMC (Hexapole)

4. Return the deﬂection yoke to its original position.

— 10 —

KV-29FV16A

DYNAMIC CONVERGENCE ADJUSTMENT

Before starting, perform Vertical and Horizontal Static Convergence

Adjustment.

1. Slightly loosen deﬂection yoke screw.

2. Remove deﬂection yoke spacers.

3. Move the deﬂection yoke for best convergence as shown below:

BGR

RGB RGB

RGB

RGB BGR

RGBR

BGR

4. Tighten the deﬂection yoke screw.

5. Install the deﬂection yoke spacers.

SCREEN-CORNER CONVERGENCE

1. Afﬁx a permalloy assembly corresponding to the misconverged areas:

a-d : screen-corner

isconvergence

TLH PLATE ADJUSTMENT

Preparation:

• Input crosshatch pattern.

• Adjust Picture Quality to standard, Picture and Brightness to 50%, and

Other to standard.

• Adjust the Horizontal Convergence of red and blue dots by tilting the

TLH plate on the deﬂection yoke.

TLH Plate

YCH

RV1750

V.STAT

XCV

C Board

TLV

(TLV)

B R R B

(R)(B) (B)(R)

TLH+

TLH-

1. Adjust XCV core to balance X axis.

2. Adjust YCH VR to balance Y axis.

3. Adjust vertical red and blue convergence with V.TILT (TLV VR.)

Perform adjustments while tracking items 1 and 2.

4. Adjust Y MAGNET to correct V.BOW Geometery Distortion.

5. Adjust H-TRP to correct H.Trapezoid Geometry Distortion.

After adjusting items 4 and 5, conﬁrm overall geometry again.

H CENTER SW ADJUSTMENT

Before adjusting H Center SW (S501, S502), make sure that HPOS data

is “7”.

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