Sony KV-G21M2J Service manual

MODEL COMMANDER DEST. CHASSIS NO.MODEL COMMANDER DEST. CHASSIS NO.

KV-G14L2J

RM-869 ME SCC-U07G-A

KV-G21M2J

RM-869 ME SCC-U07F-A

SERVICE MANUAL BG-2S

CHASSIS

TRINITRON

COLOR TV

KV -G14L2J/G21M2J

RM-869

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KV-G14L2J KV-G21M2J Note

Power requirements 110-240 V AC, 50/60 Hz Power consumption (W) Indicated on the rear of the TV Television system B/G B/G, I, D/K, M Color system

PAL, P AL 60, SECAM, NTSC4.43, NTSC3.58 (AV IN)

P AL, PAL 60, SECAM, NTSC4.43, NTSC3.58

Channel coverage

B/G VHF: E2 to E12 / UHF: E21 to E69 / CATV: S01 to S03, S1 to S41 I – UHF: B21 to B68 / CATV : S01 to S03, S1 to S41 D/K VHF: C1 to C12, R1 to R12/

– UHF: C13 to C57, R21 to R60/

CATV: Z1 to Z39, S01 to S03, S1 to S41

–

VHF: A2 to A13 / UHF: A14 to A79 / CATV : A-8 to A-2, A to W+ 4, W+ 6 to W+ 84

Audio output (speaker) 3W Inputs ˘ (antenna): 75 ohms external terminal

… (video input) jacks: phono jacks D (video): 1 Vp-p, 75 ohms ≥ (audio): 500 mVrms, high impedance

Outputs A (earphone) jack: mini jack

Ú (monitor output) jacks: phono jacks D (video): 1 Vp-p, 75 ohms ≥ (audio): 500 mVrms

Picture tube 14 in. 21in

Tube size (cm) 37 54

Measured diagonally

Screen size (cm) 34 51

Measured diagonally

Dimensions (w/h/d, mm) 373 × 346 × 412 516 × 464 × 478 Mass (kg) 11 22

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 SCHEMA TIC DIA GRAMS, 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.

Design and specifications are subject to change without notice.

KV -G14L2J/G21M2J

RM-869

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TABLE OF CONTENTS

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

2. DISASSEMBLY

2-1. Rear Cover Removal ........................................... 9

2-2. A Board Removal ................................................ 9

2-3. Service Position ................................................... 9

2-4. Replacement of Parts ........................................... 10

2-5. Terminal Board Bracket Removal ....................... 10

2-6. Demagnetization Coil Removal .......................... 10

2-7. Picture Tube Removal.......................................... 11

3. SET-UP ADJUSTMENTS

3-1. Beam Landing ...................................................... 12

3-2. Convergence ........................................................ 13

3-3. Focus Adjustment ................................................ 14

3-4. G2 (Screen) and White Balance Adjustments..... 15

4. SELF DIAGNOSIS FUNCTION............................ 16

5. CIRCUIT ADJUSTMENTS

5-1. Adjustments with Commander ............................ 17

5-2. Adjustment Method ............................................. 18

5-3. A Board Adjustment after IC003 (Memory)

Replacement......................................................... 22

5-4. Picture Distortion Adjustment ............................. 22

6. DIAGRAMS

6-1. Block Diagram ...................................................... 23

6-2. Circuit Boards Location ....................................... 26

6-3. Schematic Diagrams and Printed Wiring Boards 26

(1) Schematic Diagram of A Board ........................... 31

(2) Schematic Diagram of C Board ........................... 36

6-4. Semiconductors..................................................... 40

7. EXPLODED VIEW

7-1. Chassis .................................................................. 42

8. ELECTRICAL PARTS LIST ................................... 43

Section Title Page Section Title Page

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KV-G14L2J/G21M2J

RM-869

SECTION 1

GENERAL

The operating instructions mentioned here are partial abstracts from the Operating Instructions Manual. The page numbers of the Operating Instruction Manual remain as in this manual.

– PROGR +

SELECT

– PROGR +

– VOLUME +

TV/VIDEO

SELECT

VHF LOW B/G

KV-G14L2J/G21M2J

RM-869

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Getting Started

-EN

Connecting optional equipment

You can connect optional audio/video equipment to your TV such as a VCR, multi disc player, camcorder, or video game.

Connecting video equipment using the

…

(video input) jack

D…≥

to video and audio outputs

: Signal flow

…

(video input)

(video) and

≥

(audio) inputs

to antenna output

to video and audio outputs

VCR

≥

ÖÚ

…

: Signal flow

…

(video input)

(video) and

≥

(audio) inputs

When connecting video equipment to the

…

(video input) jack

Do not connect video equipment to the

…

(video input) jacks at the front and the rear of your TV simultaneously; otherwise the picture

will not be displayed properly on the screen.

Connecting audio/video equipment using the

(monitor output) jack

Rear of TV

to antenna socket

Camcorder

Front of TV

When recording through the

(monitor output) jack

Do not change the channel or video input while recording with a VCR; otherwise the channel or video input you are recording also will be changed.

: Signal flow

VCR

to antenna output

≥

ÖÚ

…

to video and audio inputs

(monitor output)

(video) and

≥

(audio) outputs

to antenna socket

Rear of TV

Getting Started

-EN

Connections

Connecting a VHF antenna or a combination VHF/UHF antenna — 75-ohm coaxial cable (round)

Attach an optional IEC antenna connector to the 75-ohm coaxial cable. Plug the connector into the

(antenna) socket at the rear of the TV.

Connecting an indoor antenna

On a wall

Note

• You are advised to use an outdoor antenna for better reception.

Getting Started

Rear of TV Rear of TV

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KV-G14L2J/G21M2J

RM-869

Getting Started

-EN

Presetting channels

Presetting channels automatically

Press SELECT on the remote commander or the TV until “AUTO PROGRAM” appears on the screen.

Press +/– on the remote commander or

. +/– on the TV.

Press +/– on the remote commander or

. +/– on the TV again.

To start presetting channels automatically from the specified program position

Press PROGR +/– or number buttons on the remote commander or PROGR +/– on the TV until the required program position appears on the screen after step 2 of “Presetting channels automatically”.

You can preset up to 100 TV channels in numerical sequence from program position 1 using the buttons on the remote commander or the TV.

You can preset TV channels quickly, automatically or manually.

Quick channel presetting

Press U to turn on the TV.

When the TV is turned on in standby mode, press

on the remote commander.

Press SELECT and PROGR + on the TV simultaneously for one to two seconds.

1 2

3 1

– PROGR +

SELECT

+/–

SELECT

Front of TV

Remote commander

PROGR

– PROGR +

–

PROGR

–

TV/VIDEO

SELECT



VHF LOW B/G

–

1 2 3

–

AUTO PROGRAM

SELECT SELECT

Number

PROGR +/–

Getting Started

-EN

Presetting channels manually

Press SELECT on the remote commander or the TV until “MANUAL PROGRAM” appears on the screen.

Press +/– on the remote commander or

. +/– on the TV.

Press PROGR +/– or number buttons on the remote commander or PROGR +/– on the TV until the required program position appears on the screen.

Press +/– on the remote commander or

. +/– on the TV until the required channel

picture appears on the screen .

Press SELECT on the remote commander or the TV.

Disabling program positions

Press PROGR +/– or number buttons on the remote commander or PROGR +/– on the TV until the unused or unwanted program position appears on the screen.

Press SELECT on the remote commander or the TV until “MANUAL PROGRAM” appears on the screen.

Press +/– on the remote commander or

. +/– on the TV.

Press PIC MODE on the remote commander.

Press SELECT on the remote commander or the TV.

To preset the disabled program position again

Preset the channel quickly, automatically or manually

MANUAL PROGRAM

SELECT

PROGR

– PROGR +

VHF LOW B/G

–

SELECT

–

KV-G14L2J/G21M2J

RM-869

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Operations

-EN

Watching the TV

Operations

Turning off the TV

To turn off the TV temporarily

Press

on the remote commander. The

indicator

on the TV lights up.

To turn off the TV completely

Press

on the TV.

If the power on the TV is turned off in standby mode, the

indicator on the TV may remain alight for a

while.

Watching the video input

Press …

To watch TV

Press

;

Muting the sound

Press ¤ .

Press U

to turn on the TV.

When the TV is turned on in standby mode, press

on the remote commander.

Select the TV program you want to watch.

To select a program position directly

Press the number button.

To select a two-digit program position, press “-/--” before the number buttons. For example: to select program position 25, press “-/--,” and then “2” and “5.”

To scan through program positions

Press PROGR +/– until the program position you want appears.

Press . +/– to adjust the volume.

2 5

PROGR

MUTING

;

u

VIDEO

…

-EN

Operations

• If no buttons or controls are pressed for more than two hours

after the TV is turned on using the Wake Up Timer, the TV automatically turns into standby mode. If you want to continue watching the TV, press any button or control on the TV or remote commander.

Displaying on-screen information

Press

E G.

The program position, local system, and TV settings are

displayed on the screen.

Setting the Wake Up Timer

You can set the TV automatically turned on as you

program.

Press

The on-screen display appears and the

indicator

on the TV lights up.

If you want a particular TV program or video input to be displayed using the Wake Up Timer, select the TV program or video input.

Press u on the remote commander or set the Sleep Timer to turn off the TV in standby mode.

To cancel the Wake Up Timer, press

until “WAKE UP TIMER: OFF” appears, or turn off the main power of the TV.

Notes

• The Wake Up Timer starts immediately after the on-screen

display disappears.

• The last TV program position or video input just before the TV

turns into standby mode will appear when the TV is turned on using the Wake Up Timer.

AUTO B/G

DYNAMIC

Setting the Sleep Timer

You can set the TV automatically turned off as you program.

Press

To cancel the Sleep Timer, press

Irepeatedly

until “SLEEP TIMER: OFF” appears, or turn off the TV.

Changing the on-screen display language

If you prefer Chinese to English, you can use buttons on the remote commander or the TV to change the on-screen display language.

Press SELECT until the screen appears as follows:

Press +/– to select “

⁄⁄⁄ ”.

Note

• You can also use SELECT and

+/– on the TV to select the

on-screen display language.

After 30 minutes

After 60 minutes

After 90 minutes

No sleep timer

SLEEP TIMER:30M

SLEEP TIMER:60M

SLEEP TIMER:OFF

SLEEP TIMER:90M

+/– SELECT

SELECT

LANGUAGE

»y ¤¥

: ENGLISH

No wake up timer

After 12 hours

After 10 minutes

WAKE UP TIMER:10M

WAKE UP TIMER:OFF

WAKE UP TIMER:12H00M

»y ¤¥

LANGUAGE :

⁄⁄⁄

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KV-G14L2J/G21M2J

RM-869

Operations

-EN

Adjusting the picture setting

Press SELECT until the item you want to adjust appears.

Each time you press SELECT, the screen changes as follows:

Press +/– to adjust the item.

To adjust other items, repeat steps 1 and 2.

Note

• You can also use SELECT and

+/– on the TV to adjust the

picture setting.

If the picture color is abnormal when receiving programs through the

˘ (antenna) terminal or

the

… (video input) jack

Change the “COLOR SYSTEM” setting or adjust the “COLOR” level in the on-screen display until the color becomes normal.

Note

• Normally set “COLOR SYSTEM” to “AUTO”.

PICTURE

COLOR BRIGHT

HUE

SHARPNESS

(Operative for NTSC signal only)

SELECT

Adjusting the picture

Note on the SOUND MODE button

• The sound mode feature is unavailable for your TV. Thus, the

SOUND MODE button on the remote commander is not used for your TV.

Selecting the picture mode

Press PIC MODE until the mode you want appears.

Each time you press PIC MODE, the screen changes as follows:

Note

• If you change the picture mode after the following

adjustments, the adjustment changes in accordance with the picture mode.

SOUND MODE

SELECT PIC MODE

PIC MODE

High contrast picture

Soft picture (good for video games)

DYNAMIC

STANDARD

SOFT

+/–

Front of TV

…

SELECT

–

PROGR

–

Normal picture

-EN

Additional Information

Troubleshooting

No picture No sound

/Press

Uor u.

/Check the antenna connection. /Check the VCR connections. /Check the power cord connection. /Check the standby mode.

No color

/Adjust the “COLOR” level in the on-

screen display.

/Check the “COLOR SYSTEM” setting.

TV cabinet creaks

/Even if the picture or the sound is normal,

changes in the room temperature sometimes make the TV cabinet expand or contract, making a noise. This does not indicate a malfunction.

Note on the remote commander

• The supplied remote commander is used on several models of

the TV. If you do not find instructions for some controls that are on the remote commander, that means your TV does not employ the features of those controls, e.g.

and SOUND

MODE.

Notes

• When you turn on the TV, you may hear the “boon” sound

that is caused by the demagnetization of the TV. This does not indicate a malfunction.

• The picture color may become abnormal if you change the

direction of your TV. To obtain the normal picture color, press

on the TV to turn off the TV for five minutes and then turn

it on again.

• Design and specifications are subject to change without notice.

• All contents in the instruction manual are subject to change

without notice.

WARNING

Do not install the appliance in a confined space, such as a bookcase or built-in cabinet.

Additional Information

If you have any problems, read this manual again and check the countermeasure for each of the symptoms listed below. If the problem persists after trying the methods below, contact your nearest authorized service center or dealer.

Snowy picture Noisy sound

/Check the antenna. /Check the antenna connection on the TV

and on the wall.

Dotted lines or stripes

/This may be caused by local interference

(e.g. cars, neon signs and hair dryers). Adjust the antenna for minimum interference.

Double images or “ghosts”

/This may be caused by reflections from

nearby mountains or buildings. A highly directional antenna may improve the picture.

Good picture No sound

/Press

¤.

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KV-G14L2J/G21M2J

RM-869

2-1. REAR COVER REMOVAL

2-2. A BOARD REMOVAL

SECTION 2

DISASSEMBLY

Four screws (BVTP 4×16)

Two screws (BVTP 4×16)

Lever

A board

2-3. SERVICE POSITION

A board

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KV -G14L2J/G21M2J

RM-869

Multi button

Three screws (BVTP 3

×12)

• SCREWING TORQUE 7±1 kg•cm

2-4. REPLACEMENT OF PARTS

For replacement of the Multi Button and Light Guide, cut the welded portions from them, exchange with the new parts, and fix them with screws (+BVTP) respectively.

2-4-1. REPLACEMENT OF MULTI BUTTON

2-4-2. REPLACEMENT OF LIGHT GUIDE

2-5. TERMINAL BOARD BRACKET REMOVAL

Cut

Multi button

Light guide

Cut

Light guide

Two screws (BVTP 3

×12)

• SCREWING TORQUE 7±1 kg•cm

2-6. DEMAGNETIZATION COIL REMOVAL

Two claws

A board

Terminal board bracket

A board

Terminal board bracket

Demagnetization coil

Tension spring

Picture tube

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KV-G14L2J/G21M2J

RM-869

2-7. PICTURE TUBE REMOV AL

2 Using a thumb press down, then pull up the rubber cap firmly in the direction indicated

by the arrow b.

3 When 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.

• HOW TO HANDLE AN ANODE-CAP

1 Do not damage the surface of anode-cap with sharp shaped objects. 2 Do not press the rubber too hard so as not to damage the inside of anode-cap.

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

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

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

• 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

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

2 A board

3 C board

4 Deflection yoke

Cushion

5 Four screws (Tapping screws)

1 Anode cap

Anode button

KV -G14L2J/G21M2J

RM-869

SECTION 3

SET-UP ADJUSTMENTS

• 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

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

Preparation :

• In order to reduce the influence of geomagnetism on the set's

picture tube, face it east or west.

• Switch on the power and degauss with the degausser.

Perform the adjustments in the following order:

1. Beam Landing

2. Convergence

3. Focus

4. White Balance

Note : Test Equipment Required:

1. Color-bar/Pattern Generator

2. Degausser

3. Oscilloscope

Purity control

3-1. BEAM LANDING

1. Input a white signal with the pattern generator. Contrast Brightness

2. Set the pattern generator raster signal to green.

3. Move the deflection yoke to the rear and adjust with the purity control so that the green is at the center and the blue and the red take up equally sized areas on each side. (See Figures 3-1 through 3-3.)

4. Move the deflection yoke forward and adjust so that entire screen is green. (See Figure 3-1.)

5. Switch the raster signal to blue, then to red and verify the condition.

6. When the position of the deflection yoke has been decided, fasten the deflection yoke with the screws.

7. If the beam does not land correctly in all the corners, use a magnet to adjust it. (See Figure 3-4.)

}

normal

Fig. 3-2

BLUE RED

GREEN

Fig. 3-3

Purity control corrects this area.

Disk magnets or rotatable disk magnets correct these areas (a-d).

Fig. 3-1

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Deflection yoke positioning corrects these areas.

Fig. 3-4

KV -G14L2J/G21M2J

B G R

R G B

RM-869

3-2. CONVERGENCE

Preparation :

• Before starting this adjustment, adjust the focus, horizontal size,

and vertical size.

• Minimize the brightness setting.

• Provide dot pattern.

(1) Horizontal and Vertical Sta tic Convergence

Center dot

R G B

V.STAT Magnet

• Operation of V.STAT magnet.

If the V.STAT magnet is moved in the direction of the a and b arrows, the red, green and blue dots move as shown below.

RV 701

SCREEN (G2)

1. (Moving vertically), adjust the V.STA T magnet so that the r ed, green and blue dots are on top of each other at the center of the screen.

2. (Moving horizontally), adjust the H.STAT VR so that the red, green and blue dots are on top of each other at the center of the screen.

Purity

V.STAT

• Operation of BMC (Hexapole) magnet.

If the blue or red dot does not converg e with the other two dots, perform 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

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