Sony Trinitron KV-TG21M61, Trinitron KV-TG21M90 Service Manual

MODEL COMMANDER DEST. CHASSIS NO.

CHASSIS

TRINITRON

®

COLOR TV

SERVICE MANUAL

BG-2T

MODEL COMMANDER DEST. CHASSIS NO.

KV-TG21M61 RM-952 Singapore SCC-U66B-A
KV-TG21M90 RM-952 Hong Kong SCC-U64A-A

TV

1

2

3

4

6

7

8

9

÷

0

5

JUMP

SOUND
MODE

FAVORITE

PROGRÁ

– 2 –

KV-TG21M61/TG21M90

RM-952

SPECIFICATIONS

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.

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.

Note

Power requirements 220-240 V AC, 50/60 Hz

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

Television system B/G

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

Stereo/Bilingual system NICAM Stereo/Bilingual B/G, I, D/K; A2 Stereo/Bilingual B/G

Teletext language English, Arabic, French KV-TG21M61 only

Channel coverage VHF: E2 to E12 / UHF: E21 to E69 /

CATV: S01 to S03, S1 to S41

VHF: C1 to C12, R1 to R12 / UHF: C13 to C57, R21 to R60 /
CATV: S01 to S03, S1 to S41, Z1 to Z39

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

˘ (Antenna) 75-ohm external terminal

Audio output (Speaker) 3W + 3W

Number of terminal

D Video Input: 2* Output: 1 Phono jacks; 1 VP-P, 75 ohms * One input lines available

≥ Audio Input: 2* Output: 1 Phono jacks; 500 mVrms * One input lines available
2 (Headphone) Output: 1 Stereo minijack

Picture tube 21 in.

Tube size (cm) 54 Measured diagonally

Screen size (cm) 51 Measured diagonally

Dimension (w/h/d, mm) 497 x 458 x 487

Mass (kg) 25

Design and specifications are subject to change without notice.

KV-TG21M61/TG21M90

RM-952

– 3 –

TABLE OF CONTENTS

SELF DIAGNOSTIC FUNCTION ................................... 4

1. GENERAL ................................................................. 7

2. DISASSEMBLY

2-1. Rear Cover Removal ............................................... 11

2-2. Speaker Removal .................................................... 11

2-3. Chassis Assy Removal ............................................ 11

2-4. F Board Removal .................................................... 11

2-5. Service Position ...................................................... 11

2-6. Terminal Bracket Removal ..................................... 11

2-7. A3 and V2 Boards Removal ................................... 12

2-8. Replacement of Parts .............................................. 12

2-8-1. Light Guide .................................................. 12

2-8-2. Power Button ................................................ 12

2-9. Picture Tube Removal ............................................. 12

3. SET-UP ADJUSTMENTS

3-1. Beam Landing ......................................................... 13

3-2. Convergence ............................................................ 14

3-3. Focus Adjustment.................................................... 16

3-4. G2 (SCREEN) and white balance adjustments ...... 16

4. CIRCUIT ADJUSTMENTS

4-1. Adjustment With Commander ................................ 17

4-2. Adjustment Method ................................................ 17

4-3. Picture Quality Adjustment .................................... 22

4-4. Deflection Adjustment ............................................ 22

4-5. A Board Ajustment After IC003 (MEMORY)

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

4-6. Picture Distortion Adjustment ................................ 23

Section Title Page

Section Title Page

5. DIAGRAMS

5-1. Block Diagram ........................................................ 25

5-2. Circuit Boards Location .......................................... 27

5-3. Schematic Diagram ................................................. 28

(1) Schematic Diagram of A Board ........................ 29

(2) Schematic Diagram of A3 Board ...................... 33

(3) Schematic Diagram of V2 Board ...................... 35

(4) Schematic Diagram of CV Board ..................... 37

(5) Schematic Diagram of F Board ........................ 38

5-4. Voltage Measurement ............................................. 39

5-5. Waveforms .............................................................. 43

5-6. Printed Wiring Boards and Parts Location ............. 44

5-7. Semiconductors ....................................................... 48

6. EXPLODED VIEWS

6-1. Picture tube and Chassis ......................................... 50

7. ELECTRICAL PARTS LIST.................................... 51

– 4 –

KV-TG21M61/TG21M90

RM-952

The units in this manual contain a self-diagnostic function. If an error occurs, the STANDBY/TIMER lamp will automati­cally begin to flash.
The number of times the lamp flashes translates to a probable source of the problem. A definition of the STANDBY/
TIMER lamp flash indicators is listed in the instruction manual for the user’s knowledge and reference. If an error
symptom cannot be reproduced, the remote commander can be used to review the failure occurrence data stored in
memory to reveal past problems and how often these problems occur.

1. DIAGNOSTIC TEST INDICATORS

When an errors occurs, the STANDBY/TIMER lamp will flash a set number of times to indicate the possible cause of the
problem. If there is more than one error, the lamp will identify the first of the problem areas.

Result for all of the following diagnostic items are displayed on screen. No error has occured if the screen displays a “0”.

Diagnostic

Item

Description

• Power does not
turn on

• +B overcurrent
(OCP)

• Horizontal
deflection
overdrive

• White balance
failure (no
PICTURE)

• Vertical deflection
stopped

• Micro reset

Detected

Symptoms

• Power does not come on.

• No power is supplied to

the TV.

• AC power supply is faulty.

• Power does not come on.

• Load on power line is

shorted.

• Has entered standby state
after horizontal raster.

• Power line is shorted or
power supply is stopped.

• Vertical deflection pulse
is stopped

• Power is shut down
shortly, after this return
back to normal.

• Detect Micro latch up.

Note 1: If a + B overcurrent is detected, stoppage of the vertical deflection is detected simultaneously.

The symptom that is diagnosed first by the microcontroller is displayed on the screen.

Note 2: Refer to screen (G2) Adjustment in section 3-4 of this manual.

SELF DIAGNOSTIC FUNCTION

No. of times

STANDBY/TIMER

lamp flashes

Does not light

2 times

4 times

—

Self-diagnostic

display/Diagnostic

result

—

002:000 or

002:001~255

004:000 or

004:001~225

101:00 or

101:001~225

Probable

Cause

Location

• Power cord is not
plugged in.

• Fuse is burned out
F4601 (F)

• H.OUT Q511 is shorted.
(A board)

• -13V is not supplied.
(CV Board)

• IC 503 faulty (A board)

• Discharge CRT

(CV Board)

• Static discharge

• External noise

– 5 –

KV-TG21M61/TG21M90

RM-952

2. DISPLAY OF STANDBY/TIMER LIGHT FLASH COUNT

3. STOPPING THE STANDBY/TIMER FLASH

Turn off the power switch on the TV main unit or unplug the power cord from the outlet to stop the STANDBY/TIMER
lamp from flashing.

4. SELF-DIAGNOSTIC SCREEN DISPLAY

For errors with symptoms such as “power sometimes shuts off” or “screen sometimes goes out” that cannot be con-
firmed, it is possible to bring up past occurances of failure for confirmation on the screen:

[To Bring Up Screen Test]

In standby mode, press buttons on the remote commander sequentially in rapid succession as shown below:

[Screendisplay] / channel [5] / Sound volume [-] / Power ON

˘

Note that this differs from entering the service mode (mode volume [+]).

Self-Diagnosis screen display

STANDBY/SLEEP lamp

Lamp ON 0.3 sec.

Lamp OFF 3 sec.

Lamp OFF 0.3 sec.

2 times

4 times

Diagnostic Item Flash Count*

+B overcurrent/overvoltage 2 times

Vertical deflection stopped 4 times

* One flash count is not used for self-diagnostic.

002 : 000
004 : 000

Numeral "0" means that no fault has been detected.

101 : 000

SELF DIAGNOSTIC

– 6 –

KV-TG21M61/TG21M90

RM-952

5. HANDLING OF SELF-DIAGNOSTIC SCREEN DISPLAY

Since the diagnostic results displayed on the screen are not automatically cleared, always check the self-diagnostic
screen during repairs. When you have completed the repairs, clear the result display to “0”.

Unless the result display is cleared to “0”, the self-diagnostic function will not be able to detect subsequent faults after
completion of the repairs.

[Clearing the result display]

To clear the result display to “0”, press buttons on the remote commander sequentially as shown below when the
diagnostic screen is being displayed.

Channel [8] / 0

[Quitting Self-diagnostic screen]

To quit the entire self-diagnostic screen, turn off the power switch on the remote commander or the main unit.

6. SELF-DIAGNOSTIC CIRCUIT

[+BovercurrentªOCPº] Occurs when an overcurrent on the +B(135) line is detected by Q500. If Q604 go to

ON and the voltage to pin 50 of IC301 more than 3.5V when V.SYNC is more than
seven verticals in a period, the unit will automatically turn off.

[Verticaldeflectionstopped] Occurs when an absence of the vertical deflection pulse is detected by Pin 17 and

IC001 shut down the power supply.

[Whitebalancefailure] If the RGB levels* do not balance or become low level within 5 seconds, this error

will be detected by IC301. TV will stay on, but there will be no picture.

* (Refers to the RGB levels of the AKB detection Ref pulse that detects IK.)

IC301

Y/CHROMA JUNGLE

IC001

SYSTEM

IC003

MEMORY

MP/
PROTECT

O-LED

IO-8DAT B-DAT

IO-SDAT

5

50

51

54

SDA

35

FROM
[+B] Q500

17

[V]
D553

53

– 7 –

KV-TG21M61/TG21M90

RM-952

SECTION 1

GENERAL

The operating instruction mentioned here are partial abstracts

from the Operating Instruction Manual. The page numbers of

the Operating Instruction Manual remain as in the manual.

A Getting Started

Plug in the power cord, then press ! on the TV to
turn it on.

Press SELECT and PROGR + on the TV at the same time
for one to two seconds to preset the channels
automatically. (See J)

Tip

• To stop the automatic channel presetting, press SELECT twice.

Press SELECT on the remote until “LANGUAGE/ :
ENGLISH” appears on the screen, then press + or – to
change the on-sceen display language.

Connect the antenna cable (not supplied) to 8 at the
rear of the TV.

Tip

• You can also connect your TV to other optional components.

(See E)

Step 1

Insert the batteries (supplied) into the remote.

Note

• Do not use old batteries nor use different types of batteries
together.

Step 2

Step 3

Step 4

Step 5

b

b

PROGR

SELECT

SELECT

B

WARNING

• Dangerously high voltages are present inside the TV.

• TV operating voltage: 220 – 240 V AC.

• Do not plug in the power cord until you have completed making all other connections;

otherwise a minimum leakage current might flow through the antenna and other terminals to
ground.

• To avoid battery leakage and damage to the remote, remove the batteries from the remote if
you are not going to use it for several days. If any liquid that leaks from the batteries touches
you, immediately wash it away with water.

To prevent fire or shock hazard, do not expose the
TV to rain or moisture.

Do not operate the TV if any liquid or solid object
falls into it. Have it checked immediately by
qualified personnel only.

Do not open the cabinet and the rear cover of the
TV as high voltages and other hazards are present
inside the TV. Refer servicing and disposal of the
TV to qualified personnel.

Your TV is recommended for home use only.
Do not use the TV in any vehicle or where it may
be subject to excessive dust, heat, moisture or
vibrations.

Do not block the ventilation openings of the TV.
Do not install the TV in a confined space, such as
a bookcase or built-in cabinet.

For children’s safety, do not leave children alone
with the TV. Do not allow children to climb onto
it.

Clean the TV with a dry and soft cloth. Do not
use benzine, thinner, or any other chemicals to
clean the TV. Do not scratch the picture tube.

For your own safety, do not touch any part of the
TV, the power cord and the antenna cable during
lightning storms.

Do not install the TV in an unstable position.
Use a proper TV stand.

Do not place any objects on the TV.

C

Securing the TV

To prevent the TV from falling, use the supplied screws, clamps and band to secure the TV.

Screw the band to the TV stand and to the
provided hole at the rear of your TV.

(1) Put a cord or chain through the

clamps.

(2) Screw one clamp to a wall or pillar

and the other clamp to the provided
hole at the rear of your TV.

Note

• Use only the supplied screws. Use of other screws may damage the TV.

20 mm

3.8 mm

screws clamps band

or

Do not plug in too many appliances to the same
power socket. Do not damage the power cord.

Pull the power cord out by the plug. Do not pull
the power cord itself. Even if your TV is turned
off, it is still connected to the AC power source
(mains) as long as the power cord is plugged in.
Unplug the TV before moving it or if you are not
going to use it for several days.

WARNING (continued)

!

PROGR

SELECT

(MONO)

L

R

L(MONO)R

8

6

1

3

4

7

9

2

5

0

qa

qs

★

★

D

TV front and rear panels

TV front panel

TV rear panel

Button Function

1

! Turn off completely or turn on the TV.

2

Remote control sensor.

3

1 Standby indicator.

3

Stereo/bilingual indicator.

3

Wake Up indicator.

4

PROGR +/– Select program number.

5

2 +/– * Adjust volume.

6

t Select TV or video input.

7

SELECT Select the desired item.

8

i Headphone terminal.

9, qa

t Video input terminal.

0

8 Antenna terminal.

qs

T Monitor output terminal.

* You can also use the 2 +/– buttons on the TV to work as the +/– buttons on the remote.

★

The R (audio input) jacks are only available for KV-TG21 only.

– 8 –

KV-TG21M61/TG21M90

RM-952

E

Connecting optional components

Connecting to the video input terminal ( t )

TV front panel

Camcorder

Audio/Video cable

(not supplied)

Note

• Do not connect video equipment to t (video input) at the front and the rear of your TV at

the same time; otherwise the picture will not be displayed properly on the screen.

TV rear panel

Connecting to the monitor output terminal (T)

VCR

Video game

equipment

VCR

Audio system

Audio/Video cable

(not supplied)

TV rear panel

★

The R (audio input) jacks are only available for KV-TG21 only.

Antenna cable
(not supplied)

(MONO)

L

R

★

L(MONO)R

★

L(MONO)R

★

Audio/Video cable

(not supplied)

F

Troubleshooting

If you find any problem while viewing your TV, please check the following
guide. If any problem persists, contact your Sony dealer.

Snowy picture,

noisy sound

Good picture,

noisy sound

No picture,no sound

Good picture, no sound

Dotted lines or stripes

Double images or

“ghosts”

No color

Abnormal color

patches

Teletext display is

incomplete (snowy

picture or double

images).

(KV-TG21M61 only)

The 1 (standby)

indicator on your TV

flashes red several

times after every

three seconds.

TV cabinet creaks.

A "boom" sound is

heard when the TV is

turned on.

Symptom Solutions

• Check the antenna cable and connection on the TV, VCR and on the wall.

• Preset the channel manually again. (See J)

• Check the antenna setup. Contact a Sony dealer for advice.

• Select the appropriate TV system. (See J)

• Press A/B until the sound is optimal.

• Check the power cord, antenna and the VCR connections.

• Press ?/1 (power) or ! (main power) to turn on the TV.

• Press 2 + to increase the volume level.

• Press % to cancel the muting.

• Do not use a hair dryer or other equipment near the TV.

• Check the antenna setup. Contact a Sony dealer for advice.

• Use the fine tuning ("FINE") function. (See J)

• Turn off or disconnect the booster if it is in use.

• Check the antenna setup. Contact a Sony dealer for advice.

• Select the appropriate color system. (See J)

• Adjust the color level. (See K)

• Check the antenna setup. Contact a Sony dealer for advice.

•

Keep external speakers or other electrical equipment away from the TV.
Press ! (main power) to turn off the TV for about 15 minutes, then turn it
on again to demagnetize the TV.

• Check the antenna cable and connection on the TV, VCR and on the wall.

• Use the fine tuning (“FINE”) function. (See J)

• Check the antenna setup. Contact a Sony dealer for advice.

• Count the number of times the 1 (standby) indicator flashes. Press !

(main power) to turn off your TV. Contact your nearest Sony service
center.

• Changes in room temperature sometimes make the TV cabinet expand or

contract, making a noise. This does not indicate a malfunction.

• The TV's demagnetizing function is working. This does not indicate a

malfunction.

G Specifications

Power requirements 220-240 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,NTSC3.58, NTSC4.43

Stereo/Bilingual system

NICAM Stereo/Bilingual B/G, I, D/K; A2 Stereo/
Bilingual B/G

Teletext language English, Arabic, French KV-TG21M61 only

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

M VHF : A2 to A13

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

8 (Antenna) 75-ohm external terminal

Audio output (Speaker)

3W + 3W

Number of terminal

(Video) Input: 2* Output: 1 Phono jacks; 1 Vp-p, 75 ohms * One input line

available

(Audio)

Input: 2* Output: 1 Phono jacks; 500 m Vrms * One input line

available

i

(Headphone) Output: 1 Stereo minijack

Picture tube 21 in.

Tube size (cm) 54 Measured diagonally

Screen size (cm) 51 Measured diagonally

Dimensions (w/h/d, mm)

497 x 458 x 487

Mass (kg) 25

Design and specifications are subject to change without notice.

NoteKV-TG21M90/KV-TG21M61

TV

1

2

3

4

6

7

8

9

-

0

5

JUMP

SOUND

MODE

FAVORITE

PROGR

2

qa

0

qs
qd

qf

qg

qh

qj
qk
ql

8
9

7

6

5

4

3

2

1

H

Remote control

Button Function

1

?/1 Turn off temporarily or

turn on the TV.

2

a

Display the TV program.

3

JUMP Jump to previous

channel.

4

PROGR +/– Select program number.

5

2 +/–

Adjust volume.

6

SELECT Select the desired item.

7

PIC MODE Select picture mode.

9

+/– Adjust items.

0

Display on-screen
information.

qa

%

Mute the sound.

qd

t

Select TV or video input.

qf

0 – 9, ÷ Input numbers.

Timer operations

qj

Set TV to turn on
automatically.

qk

Set TV to turn off
automatically.

Sound mode operations

qg

SOUND MODE Select sound mode.

Stereo/bilingual operations

qh

A/B Select stereo/bilingual

mode.

Teletext operations (KV-TG21M61 only)

8

x (red, green, Access a FASTEXT

yellow, blue) menu.

0

Reveal concealed
information

qs

Display Teletext
broadcast.

qd

Stop Teletext display from
scrolling.

qh

Enlarge the Teletext
display.

qj

Display Teletext service
contents.

qk

Show TV screen while
waiting for Teletext page

.

ql

FAVORITE

Not function for your TV.

See

–

–

–

–

–

–

K

–

–

–

–

–

I

I

K

M

N

N

N

N

N

N

N

–

– 9 –

KV-TG21M61/TG21M90

RM-952

J

Presetting channels

You can automatically preset up to 100 TV channels in numerical sequence
from program number 1, or manually preset desired channels and channels
that cannot be preset automatically.

Presetting channels automatically
from a specified program number

1

Press SELECT until “AUTO PROGRAM” appears
on the screen.

2

Press + or – once to enter the “AUTO
PROGRAM” mode.

The on-screen display will start flashing.

3

Press PROGR +/– or the number buttons until
the desired program number appears on the
screen.

4

Press + or – to start presetting channels
automatically.

Presetting channels manually

1

Press SELECT until “MANUAL PROGRAM”
appears on the screen.

2

Press + or – once to enter the “MANUAL
PROGRAM” mode.

3

Press PROGR +/– or the number buttons until
the desired program number appears on the
screen.

4

Press + or – until the desired channel picture
appears on the screen.

5

To preset other channels manually, repeat steps
3 to 4.

Number

buttons

SELECT

PROGR +/–

+ or –

PIC MODE

TV

1

2

3

4

6

7

8

9

-

0

5

JUMP

SOUND

MODE

FAVORITE

PROGR

2

Presetting channels (continued)

To change the TV system setting

If the picture or sound is abnormal when receiving programs through the 8 (antenna)
terminal

(1) Press SELECT until “TV SYS” appears on the screen.

(2) Press + or – to select the appropriate TV system until the picture or sound quality

is optimal.

B/G I D/K M

To change the color system setting

If the color is abnormal when receiving programs through the 8 (antenna) terminal
or the t (video input) terminal

(1) Press SELECT until “COLOR SYS” appears on the screen.

(2) Press + or – to select the appropriate color system until the color is optimal.

AUTO PAL SECAM NTSC3.58 NTSC4.43

To skip program numbers

(1) Press PROGR +/– or the number buttons until the unused or unwanted program

number appears on the screen.

(2) Press SELECT until “MANUAL PROGRAM” appears on the screen.

(3) Press + or – once to enter the “MANUAL PROGRAM” mode.

(4) Press PIC MODE to skip the unused or unwanted program number.

(5) Press SELECT to exit the “MANUAL PROGRAM” mode.

Note

• To restore the skipped program number again, preset the channel automatically or manually.

To use the fine tuning function

The fine tuning (FINE) function may help to reduce the following problems:
double images and lines moving across the TV screen.

You can use the fine tuning function as below:

(1) Select the program number you want to adjust.

(2) Press SELECT until “MANUAL PROGRAM” appears on the screen.

(3) Press + or – once to enter the “MANUAL PROGRAM” mode.

(4) Press

to display “FINE” on the screen.

(5) Press + or – continuously until the above problems are minimized.

The + or – icon on the screen flashes while tuning.

(6) Press SELECT to exit the “MANUAL PROGRAM” mode.

Adjusting the picture and sound settings

1

Press SELECT until the desired setting appears.

Each time you press SELECT, the setting item will change as follows:

2

Press + or – to adjust the item.

3

To adjust other items, repeat steps 1 to 2.

Notes

•“BASS”, “TREBLE” and “BALANCE” can be adjusted for KV-TG21M90 only.

•“HUE” can be adjusted for the NTSC color system only.

• Reducing “SHARP” can also reduce picture noise.

K

Customizing the picture and sound

You can customize the picture and sound by selecting the picture and sound
modes or by adjusting its settings.

You can change the sound effect by selecting the surround mode.

Selecting the picture mode

Press PIC MODE to select the desired picture mode.

Select To

“DYNAMIC” view high contrast pictures.

“STANDARD” view normal contrast pictures.

“SOFT” view mild pictures.

Selecting the sound mode

Press SOUND MODE to select the desired sound
mode.

Select To

“9 DYNAMIC” listen to dynamic and clear

sound that emphasizes the low
and high sound.

“9 DRAMA” listen to sound that emphasizes

vocals and background music.

“9 SOFT” listen to soft sound.

SOUND

MODE

PIC MODE

SELECT

+ or –

TV

1

2

3

4

6

7

8

9

-

0

5

JUMP

SOUND

MODE

FAVORITE

PROGR

2

PICTURE COLOR BRIGHT HUE

BALANCE TREBLE BASS

SHARP

I

Setting the timers

You can turn on and off your TV by using the and buttons respectively.

Setting the Wake Up timer

1

Press until the desired period of time appears
on the screen.

The Wake Up timer starts immediately after you
have set it.

2

Select the TV program number or video input
you want to wake up to.

3

Press \/1, or set the Sleep timer if you want the
TV to turn off automatically.

The

indicator on the TV lights up orange when

the TV goes into standby mode.

Setting the Sleep timer

Press until the desired period of time appears
on the screen.

The Sleep timer starts immediately after you have
set it.

Notes

• You can also cancel the Wake Up and Sleep timers by turning off the TV’s main power.

• 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 goes into standby mode.

\/1

TV

1

2

3

4

6

7

8

9

-

0

5

JUMP

SOUND
MODE

FAVORITE

PROGR

2

WAKE UP TIMER:0H10M

WAKE UP TIMER:OFF

WAKE UP TIMER:12H00M

(After 10 minutes)

(No Wake Up timer) (After 12 hours)

SLEEP TIMER:30M SLEEP TIMER:60M

SLEEP TIMER:OFF SLEEP TIMER:90M

(After 30 minutes)

(No Sleep timer)

(After 60 minutes)

(After 90 minutes)

– 10 –

KV-TG21M61/TG21M90

RM-952

L

Adjusting the picture position

If the picture is slanting, you can adjust the picture position using the
“PIC ROTATION” function until it is optimal.

1

Press SELECT repeatedly until “PIC ROTATION”
appears on the screen.

2

Press + or – to adjust the picture position.

The

+

or icon on the screen flashes while

adjusting.

Note

• To reduce the slanting picture, keep external speakers or other electrical equipment away
from the TV.

+ or –

SELECT

Slanting Optimal

Good morning!

Good morning!

FAVORITE

A/B

M

Enjoying stereo or bilingual
programs

You can enjoy stereo sound or bilingual programs of NICAM and A2 stereo
systems by using the A/B button.

When receiving a NICAM program

Broadcasting On-screen display (Selected sound)

NICAM
stereo
(KV-TG21M90 only)

NICAM
bilingual

NICAM
monaural

When receiving an A2 program

Broadcasting On-screen display (Selected sound)

A2
stereo

A2
bilingual

Notes

• If the sound is distorted when receiving a monaural program through the 8 (antenna)

terminal, press A/B repeatedly until “MONO” appears on the screen. To cancel the monaural
sound setting, press A/B again until “AUTO” appears on the screen.

• If the stereo sound is noisy when receiving a stereo program, select “MONO”. The sound
becomes monaural, but the noise is reduced.

KV-TG21M90 only

• Before receiving a NICAM stereo program in China, please check the NICAM broadcast
condition in your area. When receiving a NICAM stereo program, the receiving conditions
might vary depending on area. In addition, different strength of the NICAM broadcast signal
might affect the receiving quality.

TV

1

2

3

4

6

7

8

9

-

0

5

JUMP

SOUND
MODE

FAVORITE

PROGR

2

NICAM

(Stereo sound)

MONO

(Regular sound)

t

t

NICAM MAIN
(Main sound)

NICAM SUB
(Sub sound)

MONO

(Regular sound)

tt

t

NICAM MAIN

(Main sound)

MONO

(Regular sound)

t

t

MONO

(Regular sound)

STEREO

(Stereo sound)

t

t

MAIN

(Main sound)

SUB

(Sub sound)

t

t

N

Viewing Teletext

B

Not function for your TV

Some TV stations broadcast an information service called Teletext which
allows you to receive various information, such as stock market reports and
news.

You can use the buttons on the remote to view Teletext.

To Do this

display a Teletext

Press . Each time you press , the

page on the

screen changes as follows:

TV picture

Teletext t Teletext and TV t TV.
If there is no Teletext broadcast, “100” is
displayed at the top left corner of the
screen.

check the contents Press .
of a Teletext service An overview of the Teletext

contents, including page numbers,
appears on the screen.

select a Teletext page

Press the number buttons to enter the
three-digit page number of the desired
Teletext page. If you make a mistake,
reenter the correct page number. To access
the next or previous page, press
PROGR +/–.

hold (pause) a Press to display the symbol “ z” at
Teletext display the top left corner of the screen. To

resume normal Teletext viewing, press

or .

reveal concealed Press .
information (e.g., To conceal the information, press the
an answer to a quiz) button again.

enlarge the Teletext Press . Each time you press , the
display Teletext display changes as follows:

Enlarge upper half

t

Enlarge lower half

t

Normal size.

stand by for a Teletext 1 Enter the Teletext page number that
page while watching you want to refer to, then press

.

a TV program 2 When the page number is displayed,

press

to show the text.

select a FASTEXT

Press x (red, green, yellow and blue)

menu or the colored

that corresponds to the desired menu or

boxes page number.

turn off Teletext Press a.

Note

• The FASTEXT feature can be used only when the FASTEXT broadcast is available.

x

(red,

green,

yellow,

blue)

TV

1

2

3

4

6

7

8

9

-

0

5

JUMP

SOUND
MODE

FAVORITE

PROGR

2

– 11 –

KV-TG21M61/TG21M90

RM-952

1 Seven screws

(+BVTP 4 × 16)

1 Rear Cover

2-6. TERMINAL BRACKET REMOVAL

SECTION 2

DISASSEMBLY

2-1. REAR COVER REMOVAL

2-2. SPEAKER REMOVAL

2-3. Chassis Assy Removal

1 Four screws

(BVTP 3 × 12)

CRT SUPPORT BLOCK

1 Four screws

(BVTP 3 × 12)

Push claw

2-5. SERVICE POSITION

Caution:

Do not take out CRT support block while TV set in

standing position.

Note:

Undress necessary wires that creates tension while

placing the chassis into Service Position.

2-4. F BOARD REMOVAL

1 One screw

(+BVTP 4 × 16)

2 Terminal Bracket

F Board
(KV-TG21M90 only)

– 12 –

KV-TG21M61/TG21M90

RM-952

2-7. A3 BOARD AND V2 BOARD REMOVAL

2-8-2. Power Button

2-8-1. Light Guide

2-9. PICTURE TUBE REMOVAL

Note:

• Please make sure the TV set is not in standing position before removing necessary
CRT support located on bottom right and left.

One screw
(+BVTP 3 × 12)

1 Push to direction

of arrow and remove.

!™

!£

8 Demagnetic coil

4 Four screws

(BVTP 3 × 12)

!º Two screws

(Tapping 5+
Crown Washer)

3 Speaker

(5 × 9cm)

6 Tension

spring

7 Chassis assy

5 Deflection

yoke

2 CV board

1 Anode cap

Coating earth assy

!∞ Picture tube

!¢ Cushion

9

Two screws
(Tapping 5 +
Crown Washer)

!¡

Holder DGC

Cushion DGC

Cushion DGC

4 Four screws

(BVTP 3 × 12)

A Board

CRT Support Block

Slim Beznet

CRT Support Block

Screw Location

Beznet Hook

2-8. REPLACEMENT OF PARTS

For replacements of light guide,unscrew them,
exchange with new parts and fix them with
screws respectively.

A3 BOARD

V2 BOARD
(KV-TG21M61 only)

– 13 –

KV-TG21M61/TG21M90

RM-952

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 switches should be set as follows unless otherwise

noted:

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

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

Perform the adjustments in the following order :

1. Beam Landing

2. Convergence

3. Focus

4. White Balance

Note : Test Equipment Required.

1. Pattern Generator

2. Degausser

3. Oscilloscope

SECTION 3

SET-UP ADJUSTMENTS

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

normal

Preparation :

In order to reduce the influence of geomagnetism on the
set's picture tube, face it east or west.
Switch on the set's power and degauss with the degausser.

3-1. BEAM LANDING

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

2. Set the pattern generator raster signal to a green raster.

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 3-4.)

4. Move the deflection yoke forward and adjust so that the
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 and DY spacers.

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

}

Fig. 3-1

Fig. 3-4

Fig. 3-3

Fig. 3-2

Purity control

Red

Blue

Green

Purity control
corrects this area.

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

Deflection yoke positioning
corrects these areas.

a

b

b

c

c

d

d

a

– 14 –

KV-TG21M61/TG21M90

RM-952

4 BMC (Hexapole) Magnet.

If the red, green and blue dots are not balanced or aligned,
then use the BMC magnet to adjust in the manner described
below.

3-2. CONVERGENCE

Preparation :

• Before starting this adjustment, adjust the focus, horizontal
size and vertical size.

• Receive dot/hatch signal.

• Pic mode: Soft.

(1) Horizontal and Vertical Static Convergence

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

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

3. If the H.STAT variable resistor cannot bring the red, green
and blue dots together at the center of the screen, adjust the
horizontal convergence with the H.STAT variable resistor
and the V.STAT magnet in the manner given below.
(In this case, the H.STAT variable resistor and the V.STAT
magnet influence each other, so be sure to perform adjust­ments while tracking.)

1

3

Center dot

R G B

R

G

B

H. STAT VR

V. STAT

Magnet

RV702

H. STAT

CV Board

RG B R G B R GB

RB

RG

G

GB

RB

• Operation of V. Stat magnet
If the V. Stat magnet is moved in the "a" and "b" arrows, the
red, green and blue dots move as shown below.

BMC (Hexapole)

V.STAT

DY pocket

Purity

V.STAT

BMCPurity

2

R

R

G

G

B

B

a

a

b

b b

R

RGGBB

a

b

a

b

R

R

G

G

B

B

a

a

b

b

b

– 15 –

KV-TG21M61/TG21M90

RM-952

TLH Insert TLH Correction Plate to DY Pocket (Left or

Right)

YCH Rotate YCH VOL on DY

TLV Rotate TLV VOL ON DY
XCV Rotate XCV Adj core on DY

ON DY:

YCH

TLV

DY pocket

DY pocket

XCV

(2) Dynamic Convergence Adjustment

Preparation:

Before starting this adjustment, adjust the horizontal static

convergence and the vertical static convergence

RB

RB

TLH TLV

YCH XCV

B

R

R

B

– 16 –

KV-TG21M61/TG21M90

RM-952

3-3. FOCUS ADJUSTMENT

FOCUS adjustment should be completed before W/B adjustment.

1. Receive digital monoscope pattern.

2. Set "Picture Mode" to "DYNAMIC".

3. Adjust focus VR so that the center of screen becomes
just focus.

4. Change the receiving signal to white pattern and blue back.

5. Confirm magenta ring is not noticeable. Incase magenta is
very obvious, adjust focus VR to take balance of magenta
ring and focus.

3-4. G2 (SCREEN) AND WHITE BALANCE

ADJUSTMENTS

1. G2 (SCREEN) ADJUSTMENT

1) Set the PICTURE to normal.

2) Put to VIDEO input mode without signals.

3) Connect R, G and B of the CV board cathode to the
oscilloscope.

4) Adjust BRIGHTNESS to obtain the cathode voltage to the
value below.

5) Adjust G2 (screen) on the FBT until picture shows the point
before cut off.

0 V

Cathode setting voltage:

175 V ± 2 (VDC)

2.a). WHITE BALANCE ADJUSTMENT

1) Set to Service Mode (Refer Section 4-1: ADJUSTMENTS
WITH COMMANDER).

2) Input white raster signal.

3) Set 49 (ABL) and IF (VP2) service mode to 00.

4) Set Picture to DYNAMIC.

5) Select OB (RDR) with [1] and [4], and set the level to 25
with [3] and [6] for best white balance.

6) Select OC (GDR) and OD (BDR) with [1] and [4], and adjust
the level with [3] and [6] for the best white balance.

7) Write into the memory by pressing [MUTING] then [0].

8) Set back 49 (ABL) and IF (VP2) service mode to original data.

2.b).SUB BRIGHT ADJUSTMENT

1) Set to service mode.

2) Set 49(ABL) and IF (VP2) service mode to 00

3) Input a staircase signal of black to white from the pattern
generator.

4) BRIGHTNESS ....50%.

PICTURE ............MINIMUM

5) Select OE 'SBR' with [1] and [4], and adjust OE 'SBR' level
with [3] and [6] so that the second stripe from the right is
dimly lit.

6) Write into the memory by pressing [MUTING] then [0].

7) Set back 49 (ABL) and IF (VP2) service mode to original data.

White

second from the right

Black

FOCUS

SCREEN

FLYB ACK TRANSFORMER (T503)

a

d

c

b

a to d : Permalloy assembly

Fix a Permalloy assy
corresponding to the
misconverged areas

ba

cd

a-d : screen-corner
misconvergence

(3) Screen-corner Convergence

– 17 –

KV-TG21M61/TG21M90

RM-952

SECTION 4

CIRCUIT ADJUSTMENTS

4-1. ADJUSTMENT WITH COMMANDER

Service adjustments to this model can be performed using the
supplied Remote Commander RM-952

a. ENTERING SERVICE MODE

With the unit on standby

This operation sequence puts the unit into service mode.

The screen display is :

b. METHOD OF CANCELLATION FROM SERVICE

MODE

Set the standby condition (Press [POWER] button on the com­mander), then press [POWER] button again, hereupon it becomes

TV mode.

c. METHOD OF WRITE INTO MEMORY

1) Set to Service Mode.

2) Press [1] (UP) and [4] (DOWN), to select the adjustment.

4) Press [MUTING] button to indicate WRITE on the screen.

5) Press [0] button to write into memory.

d. MEMORY WRITE CONFIRMATION METHOD

1) After adjustment, pull out the plug from AC outlet, and then

plug into AC outlet again.

2) Turn the power switch ON and set to Service Mode.

3) Call the adjusted items again to confirm adjustments were

made.

n

[DISPLAY] n 5 n VOL (+) n [POWER]

4-2. ADJUSTMENT METHOD

Item Number 00 HPS

This explanation uses H POSITION as an example.

1. Select “00 HPS” with the 1 and 4 buttons.

2. Raise/lower the data with the 3 and 6 buttons.

3. Select the optimum state. (The standard is 1F for PAL

reception.)

4. Write with the

[MUTING] button. (The display changes to

WRITE.)

5. Execute the writing with the - button. (The WRITE

display will be changed to red color while excuting, and

back to SERVICE.)

Example on screen display :-

1, 4 Select the adjustment item.

↓

3, 6 Raise/lower the data value.

↓

[MUTING] Writes.

↓

- Executes the writing.

e. OTHER FUNCTION VIA REMOTE COMMANDER

7, - All the data becomes the values in memory.
8, - All user control goes to the standard state.
5, - Service data initialization (Be sure not to use

usually.)

2, - Copy and write all data.

[MUTE], - Write 50Hz adjustment data to 60Hz or vice

versa.

Use the same method for all Items. Use 1 and 4 to select the
adjustment item, use 3 and 6 to adjust, write with [MUTING],
then execute the write with -.

Note : 1. In [WRITE], the data for all items are written into

memory together.

2. For adjustment items that have different standard
data between 50Hz or 60Hz, be sure to use the
respective input signal after adjustment.

PAL,SECAM:50
NTSC :60

HPS 33 SERVICE

Data

Mode

Item

Adjustment

Software version

Suffix No
(OEM Code)

Total Power-On time (hours)

00

Item No

Depends on signal

1.3C

00 000A

50

079S

33 SERVICE 50HPS

Adjusted with [3] and [6] buttons.

GREEN

Write with [MUTING]

Write executed with [0]

00

33 WRITE 50HPS

GREEN

00

33 WRITE 50HPS

00

RED
The WRITE display
then the display
returns to green
SERVICE