Sony Transitron KV-B14K3 Manual de usuario

MODEL COMMANDER DEST. CHASSIS NO.

KV-B14K3

RM-849S Vietnam SCC-H37J-A

SERVICE MANUAL

MODEL COMMANDER DEST. CHASSIS NO.

CHASSIS

TRINITRON

COLOR TV

G3E(D)

– 2 –

KV-B14K3

RM-849S

SPECIFICATIONS

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.

SAFETY-RELATED COMPONENT WARNING!!

COMPONENTS IDENTIFIED BY SHADING AND MARK !

ON THE SCHEMATIC DIAGRAMS, EXPLODED VIEWS

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.

Note

Power requirements 110-240 VAC, 50/60 Hz

Power consumption (W) Indicated on the rear of the TV

Television system B/G, D/K

Color system PAL, PAL 60, NTSC4.43, NTSC3.58 (AV IN)

Channel coverage

B/G VHF: E2 to E12/UHF: E21 to E69/CATV: S01 to S03, S1 to S20

D/K VHF: R1 to R12/UHF: R21 to R60/CATV: S01 to S03, S1 to S20 to Z39

Audio output (speaker) 5W

Inputs Antenna: 75 ohms

VIDEO IN jacks: phono jacks

Video: 1 Vp-p, 75 ohms

Audio: 500 mVrms, high impedance

Outputs Headphone jack: minijack

MONITOR OUT jacks: phono jacks

Video: 1 Vp-p, 75 ohms

Audio: 500 mVrms

Picture tube 14 in.

Tube size (cm) 37 Measured diagonally

Screen size (cm) 34 Measured diagonally

Dimensions (w/h/d, mm) 422 ×350 ×406

Mass (kg) 12

Design and specifications are subject to change without notice.

– 3 –

KV-B14K3

RM-849S

TABLE OF CONTENTS

1. GENERAL.................................................................... 4

2. DISASSEMBLY

2-1. Rear Cover Removal............................................ 8

2-2. Service Position ................................................... 8

2-3. Picture Tube Removal.......................................... 8

3. SET-UP ADJUSTMENTS

3-1. Beam Landing...................................................... 10

3-2. Convergence......................................................... 11

3-3. Focus Adjustment ................................................ 13

3-4. Screen (G2) and White BalanceAdjustments..... 13

4. CIRCUIT ADJUSTMENTS

4-1. A Board Adjustments........................................... 14

5. DIAGRAMS

5-1. Block Diagrams .................................................... 17

5-2. Circuit Boards Location ....................................... 21

5-3. Schematic Diagrams and Printed Wiring Boards

(1) Schematic Diagram of A Board...................... 25

(2) Schematic Diagram of C Board...................... 29

5-4. Semiconductors..................................................... 31

6. EXPLODED VIEW

6-1. Chassis .................................................................. 33

7. ELECTRICAL PARTS LIST.................................... 34

Section Title Page Section Title Page

– 8 –

KV-B14K3

RM-849S

SECTION 2

DISASSEMBLY

2-1. REAR COVER REMOVAL

2-2. SERVICE POSITION

A board

1Two screws

(BVTP 4×16)

3Two washer head screws

(BVTP 4×16)

0Four tapping

screws (5)

4Speaker

block (L)

2Speaker

block (R)

9Tension spring

!™ Degaussing coil

7C board

5Anode cap

Cushion

8Deflection yoke

!¡ Picture tube

6A board

2-3. PICTURE TUBE REMOVAL

2Two screws

(BVTP 4×16)

3One screw

(BVTP 3×12)

1Two screws

(BVTP 4×16)

4One screw

(BVTP 3×12)

– 9 –

KV-B14K3

RM-849S

•REMOVAL OF ANODE-CAP

NOTE : After removing the anode, short circuit the anode of the picture tube and the

anode cap to the metal chassis, CRT shield or carbon paint on the CRT.

•REMOVING PROCEDURES

1Turn up one side of the rubber cap in the direction indicated by the arrow a

3When one side of the rubber cap is separated from the anode button, the

anode-cap can be removed by turning up the rubber cap and pulling it up in the

direction of the arrow c

2Using a thumb pull up the rubber cap firmly in the direction indicated by the

arrow b

1Do not damage the surface of the anode-cap with sharp shaped objects.

2Do not press the rubber too hard so as not to damage inside of anode-cap.

A metal fitting called the shatter-hook terminal is built into the rubber.

3Do not turn the foot of rubber over too hard.

The shatter-hook terminal will stick out or damage the rubber.

•HOW TO HANDLE AN ANODE-CAP

Anode button

– 10 –

KV-B14K3

RM-849S

•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.

Controls and switch should be set as follows unless otherwise noted:

PICTURE control........................................................... normal

BRIGHTNESS control................................................... normal

SECTION 3

SET-UP ADJUSTMENTS

Perform the adjustments in the following order :

1. Beam Landing

2. Convergence

3. Focus

4. Screen (G2) and White Balance

Note : Test Equipment Required :

1. Color-bar/Pattern Generator

2. Degausser

3. DC Power Supply

4. Digital Multimeter

.................................................................................................................................................................................................................................

Preparation :

•Feed in the white pattern signal.

•Before starting, degauss the entire screen.

3-1. BEAM LANDING

1. Input a raster signal with the pattern generator.

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

control to the center as shown in Fig. 2.

3. Turn the raster signal of the pattern generator to green.

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

control so that green is in the center and red and blue are at the

sides evenly. (Fig. 1 through 3.)

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

screen becomes green. (Fig. 1.)

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. (Fig. 4.)

Fig. 1

Deflection yoke positioning

corrects these areas.

Purity control corrects

this area. Disk magnets or rotatable

disk magnets correct

these areas (a-d).

Fig. 3

Fig. 3-4

Fig. 2

GREEN

BLUE RED

Purity control

– 11 –

KV-B14K3

RM-849S

3-2. CONVERGENCE

Preparation :

•Before starting, perform FOCUS, H.SIZE, V. LIN and V. SIZE

adjustments.

•Set BRIGHTNESS control to minimum.

•Feed in dot pattern.

(1) Horizontal and Vertical Static Convergence

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

the center of the screen. (Horizontal movement)

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

the center of the screen. (Vertical movement)

3. If the red, green and blue dots can not converge on the center

of screen, perform convergence adjustment using V.STAT

magnet and BMC Magnet as shown below. (In the case,V.STAT

magnet and BMC magnet effect each other.)

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

aand b, the red, green and blue dots move as shown below.

R G B

Center dot

V.STAT Magnet

B G R

R G B

•If the blue dot does not converge with red and green dots, per-

form following steps.

Move BMC magnet (a) to correct insufficient H.static

convergence.

Rotate BMC magnet (b) to correct insufficient V.static

convergence

In either case, repeat Beam Landing Adjustment.

BMC magnet

– 12 –

KV-B14K3

RM-849S

Fix a Permalloy assy

corresponding to the

misconverged areas

Permalloy assembly

(2) Dynamic Convergence Adjustment

Preparation :

•Before starting perform Horizontal and Vertical static conver-

gence Adjustment.

1. Slightly loosen deflection yoke screws.

2. Remove deflection yoke spacers.

3. Move the deflection yoke for best convergence as shown

below.

4. Tighten the deflection yoke screw.

5. Install the deflection yoke spacers.

(3) Screen-corner Convergence

a-d : screen-corner

misconvergence

RGB

RGBR

RGBRGB

RGB RGB

BRGBR

RGB

– 13 –

KV-B14K3

RM-849S

3-3. FOCUS ADJUSTMENT

Adjust FOCUS control for the best focus

3-4. G2 (SCREEN) AND WHITE BALANCE

[G2 (SCREEN)]

1) Input a dot pattern.

2) Set the PIC, BRT controls at minimum and COLOR control at

50%.

3) Confirm the BKG voltage is less than 160Vdc (14 inch,

16 inch), 165 Vdc (21 inch) when turning RV706 (B.BKG),

RV 704 (G.BKG) and RV702 (R.BKG).

4) Note the color when becomes visible first when turning RV707

(SCREEN).

[WHITE BALANCE (Cut off)]

1) Input a all white signal.

2) Set the PIC control to minimum and set the BRT control at

normal.

3) Turn RV703 (G.DRIVE) and RV705 (B.DRIVE) fully clock-

wise.

4) Adjust BKG controls for best white balance.

5) Set the PICTURE control to maximum.

Observe the screen and adjust the DRIVE controls for best white

balance.

6) Repeat steps 4 and 5.

RV 706

B. BKG

RV 704

G. BKG

RV 702

R. BKG

RV 707

SCREEN

RV 709

FOCUS

RV 705

B. DRIVE

RV 703

G. DRIVE

– 14 –

KV-B14K3

RM-849S

4-1. A BOARD ADJUSTMENT

RF AGC ADJUSTMENT (IF201)

1. Receive a strong off-air signals.

2. Adjust RF AGC VR control so that snow noise and cross-

modulation disappear from the picture.

A•P•C ADJUSTMENT (CV443) (PAL)

1. Short circuit between pin 4and pin $¶ of IC301 with jumper.

2. Input the PAL color-bar signal.

3. Set the PIC, COL and BRT controls to normal.

4. Adjust CV443 for suitable color intensity.

5. Remove the jumper.

ANTI PAL, LINE CRAWLING ADJUSTMENT

(RV301, RV302, T301)

• ANTI PAL ADJUSTMENT

1. Input the PAL color-bar signal.

2. Set the PIC, COL and BRT controls to normal.

3. Connect the oscilloscope to pin 3of CN301 connector.

4. Adjust RV301 (SBM) and RV302 (PHASE) to obtain the

waveform as shown below.

right

pattern

wrong

pattern

• LINE CRAWLING ADJUSTMENT

1. Input the PAL color-bar signal.

2. Set the PIC, COL, and BRT controls to normal.

3. Connect the oscilloscope to pin 3of CN301 connector.

4. Adjust T301 for minimum line crawling.

S801 H. CENT (HORIZONTAL CENTER)

L807 H. SIZE (HORIZONTAL SIZE)

RV503 V. SIZE (VERTICAL SIZE)

RV551 V. CENT (VERTICAL CENTER)

RV502 V. LIN (VERTICAL LINEARITY)

V. SIZE

RV503 V. LIM

RV502

IC001

IC301

CV358

CV443

T301

L807 IF201

A BOARD

– component side –

SBM

RV301

V. CENT

RV551

H. CENT

S801

PHASE

RV302

RF. AGC

SECTION 4

CIRCUIT ADJUSTMENT

Tabla de contenidos

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