Sony KV-G21M2 User manual

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

KV-G21M2

RM-869 Russia SCC-U11B-A

SERVICE MANUAL BG-2S

CHASSIS

TRINITRON

COLOR TV

– 2 –

KV-G21M2

RM-869

Note

Power requirements 110-240 V AC, 50/60 Hz

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

Television system B/G, I, D/K, M

Color system PAL, 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

IUHF: 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

MVHF: 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: minijack

Ú(monitor output) jacks: phono jacks

D(video): 1 Vp-p, 75 ohms

≥(audio): 500 mVrms

Picture tube 21 in.

Tube size (cm) 54 Measured diagonally

Screen size (cm) 51 Measured diagonally

Dimensions (w/h/d, mm) 516 ×464 ×478

Mass (kg) 22

Design and specifications are subject to change without notice.

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 CRITICALTO SAFE OPERATION. REPLACE

THESE COMPONENTS WITH SONY PARTS WHOSE PART

NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN

SUPPLEMENTS PUBLISHED BY SONY.

– 3 –

KV-G21M2

RM-869

TABLE OF CONTENTS

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

2. DISASSEMBLY

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

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

2-3. F1 Board Removal ............................................... 9

2-4. Service Position ................................................... 9

2-5. Replacement of Parts ........................................... 10

2-6. Terminal Board Bracket Removal ....................... 10

2-7. Demagnetization Coil Removal .......................... 10

2-8. 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......................................................... 21

5-4. Picture Distortion Adjustment ............................. 21

6. DIAGRAMS

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

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

6-3. Schematic Diagrams and Printed Wiring Boards. 26

(1) Schematic Diagrams of A and F1 Boards ............ 31

(2) Schematic Diagram of C Board............................ 35

6-4. Semiconductors..................................................... 37

7. EXPLODED VIEW

7-1. Chassis .................................................................. 39

8. ELECTRICAL PARTS LIST.................................... 41

Section Title Page Section Title Page

– 4 –

KV-G21M2

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

÷≥

÷Ú

÷…

– 5 –

KV-G21M2

RM-869

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

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

VCR

to antenna

output

≥

÷Ú

…

to video

and audio

inputs

: Signal flow

Rear of TV

to antenna

output

to video

and audio

outputs

VCR

to antenna socket

≥

÷Ú

…

: Signal flow

Front of TV

Camcorder

…

≥

to video and

audio outputs

: Signal flow

…

(video input)

(video) and

≥

(audio) inputs

(monitor output)

(video) and

≥

(audio) outputs

…

(video input)

(video) and

≥

(audio) inputs

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.

Getting Started

-EN

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

Connections

On a wall

Note

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

÷≥

÷Ú

÷…

Getting Started

Rear of TV Rear of TV

– 6 –

KV-G21M2

RM-869

Getting Started

-EN

Presetting channels

If the picture color is poor and/or the sound is

noisy

Select the appropriate TV system as follows:

1Press SELECT on the remote commander or the TV

until “TV SYSTEM” appears.

2Press +/– on the remote commander or .+/– on

the TV until the picture and sound becomes

normal.

Notes

•If you do not know your local TV system, consult your nearest

authorized service center or dealer.

•The setting of the “TV SYSTEM” is memorized for each

program position.

Presetting channels automatically

Press SELECT on the remote commander or

the TV until “TV SYSTEM” appears on the

screen.

Press +/– on the remote commander or

.+/– on the TV to select the TV system.

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.

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 Uto turn on the TV.

When the TV is turned on in standby mode, press

uon the remote commander.

Press SELECT and PROGR + on the TV

simultaneously for one to two seconds.

Remote commander

123 1

– PROGR +

SELECT

–

PROGR

–

TV/VIDEO

SELECT



Number

PROGR +/–

+/–

SELECT

Front of TV

TV SYSTEM

SELECT SELECT

AUTO PROGRAM

SELECT SELECT

VHF LOW B/G

–

B/G I D/K M

–

Getting Started -EN

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 4 of “Presetting channels automatically”.

Presetting channels manually

Press SELECT on the remote commander or the

TV until “TV SYSTEM” appears on the screen.

Press +/– on the remote commander or

+/– on the TV to select the TV system.

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

123

789

÷0

PROGR

– PROGR +

VHF LOW B/G

–

SELECT SELECT

1 2 3 1

–

123

789

÷0

PROGR

– PROGR +

TV SYSTEM

SELECT SELECT

B/G I D/K M

–

MANUAL PROGRAM

SELECT SELECT

–

– 7 –

KV-G21M2

RM-869

Operations

-EN

Watching the TV

Turning off the TV

To turn off the TV temporarily

Press uon the remote commander. The uindicator

on the TV lights up.

To turn off the TV completely

Press Uon the TV.

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

uindicator on the TV may remain alight for a while.

Watching the video input

Press …F.

To watch TV

Press ;.

Muting the sound

Press ¤.

Press Uto turn on the TV.

When the TV is turned on in standby mode, press

uon 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.

123

789

÷0

÷2 5

PROGR

Operations

Üu

MUTING

…F

VIDEO 1

;

Operations -EN

AUTO B/G

DYNAMIC

-EN

•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.

After 30 minutes After 60 minutes

After 90 minutes

No sleep timer

SLEEP TIMER:30M SLEEP TIMER:60M

SLEEP TIMER:OFF SLEEP TIMER:90M

Displaying on-screen information

Press

The program position, local system, and TV settings are

displayed on the screen.

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

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.

Setting the Wake Up Timer

You can set the TV automatically turned on as you

program.

Press

©repeatedly to set the timer.

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 uon the remote commander or set

the Sleep Timer to turn off the TV in

standby mode.

To cancel the Wake Up Timer, press

©repeatedly

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.

After 10 minutes

No wake up timer After 12 hours

WAKE UP TIMER:0H10M

WAKE UP TIMER:OFF WAKE UP TIMER:12H00M

Ì©

: LANGUAGE /

+/–

SELECT

LANGUAGE / : ENGLISH

SELECT

– 8 –

KV-G21M2

RM-869

Operations

-EN

Adjusting the

picture

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

Change the “TV SYSTEM” or “COLOR SYSTEM”

setting or adjust the “COLOR” level in the on-screen

display until the color becomes normal.

If the picture is abnormal when receiving

programs through 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”.

If the sound is distorted or noisy when

receiving programs through the ˘(antenna)

terminal

Change the “TV SYSTEM” setting in the on-screen

display until the sound becomes clear.

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.

Adjusting the picture setting

Press SELECT until the item you want to

adjust appears.

÷0

SOUND

MODE

SELECT

PIC MODE

High contrast

picture

Soft picture

(good for video

games)

DYNAMIC STANDARD

SOFT

+/–

SELECT

PICTURE COLOR BRIGHT

HUE

SHARPNESS

(Operative for

NTSC signal

only)

…

SELECT –

PROGR

–

Front of TV

Normal

picture

Additional Information

-EN

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.

Good picture

No sound

/Press .+.

/Press ¤.

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.

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.

/Check the “TV SYSTEM” setting.

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

Noisy sound

/Check the “TV SYSTEM” setting.

Additional Information

– 9 –

KV-G21M2

RM-869

2-1. REAR COVER REMOVAL

2-2. A BOARD REMOVAL 2-4. SERVICE POSITION

SECTION 2

DISASSEMBLY

Four screws

(BVTP 4×16)

2Two screws

(BVTP 4×16)

Lever

A board

2-3. F1 BOARD REMOVAL

A board

F1 board

– 10 –

KV-G21M2

RM-869

2-5. 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.

2-5-1. REPLACEMENT OF MULTI BUTTON

2-6. TERMINAL BOARD BRACKET REMOVAL

2-7. DEMAGNETIZATION COIL REMOVAL

Two claws

A board

Terminal board bracket

A board

Terminal board bracket

1Demagnetization coil

2Tension spring

Picture tube

Cut

Multi button

Three screws

(BVTP 3×12)

•SCREWING TORQUE

7±1 kg•cm

2-5-2. REPLACEMENT OF LIGHT GUIDE

Light guide

Cut

Light guide

Two screws

(BVTP 3×12)

•SCREWING TORQUE

7±1 kg•cm

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