Sony KV-XG25M50 Service Manual

SERVICE MANUAL

BG-3R

CHASSIS

MODEL COMMANDER DEST. CHASSIS NO.

KV-XG25M50 RM-952 Malaysia SCC-U45D-A

MODEL COMMANDER DEST. CHASSIS NO.

JUMP

SOUND

PROGR

MODE

FAVORITE

TRINITRON

COLOR TV

KV-XG25M50

RM-952

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, 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

M VHF: A2 to A13 / UHF: A14 to A79 /

˘˘

˘ (Antenna) 75-ohm external terminal

˘˘

Audio output 5W + 5W

Number of terminal

D (Video) Input: 3* Output: 1 Phono jacks; 1 VP-P, 75 ohms * Two input lines available ≥ Audio Input: 3* Output: 1 Phono jacks; 500 mVrms * Two input lines available 2 (Headphone) Output: 1 Stereo Minijack

Picture tube 25 inch

Tube size (cm) 64 Measured diagonally

Screen size (cm) 60 Measured diagonally

Dimension (w/h/d, mm) 722 × 515 × 512

Mass (kg) 38

SPECIFICATIONS

Note

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

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

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.

Design and specifications are subject to change without notice.

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.

– 2 –

TABLE OF CONTENTS

KV-XG25M50

RM-952

Section Title Page

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

1. GENERAL ........................................................................ 8

2. DISASSEMBLY

2-1. Rear Cover Removal ................................................ 21

2-2. Speaker Removal ..................................................... 21

2-3. Chassis Assy Removal ............................................. 21

2-4. Service Position ....................................................... 21

2-5. Replacement of Parts ............................................... 21

2-5-1. Replacement of Control Button ..................................... 21

2-5-2. Replacement of Light Guide .......................................... 21

2-6. Terminal Bracket Removal ...................................... 22

2-7. H2 Board Removal .................................................. 22

2-8. A and B6 Boards Removal ...................................... 22

2-9. Picture Tube Removal .............................................. 23

2-10. Removal of Anode Cap............................................ 23

3. SET-UP ADJUSTMENTS

3-1. Beam Landing .......................................................... 24

3-2. Convergence ............................................................. 25

3-3. Focus Adjustment .................................................... 27

3-4. G2 (Screen) and White Balance Adjustments......... 28

Section Title Page

5. DIAGRAMS

5-1. Block Diagram ......................................................... 37

5-2. Circuit Boards Location .......................................... 39

5-3. Schematic Diagrams ................................................ 40

(1) Schematic Diagram of B6 Boards ........................... 41

(2) Schematic Diagrams of A Board ............................. 43

(3) Schematic Diagram of H2 Board ............................... 59

(4) Schematic Diagrams of C6 Board ........................... 61

(5) Schematic Diagram of VM1 Board ......................... 63

5-4. Voltage Measurements ............................................ 64

5-5. Waveforms ............................................................... 68

5-6. Printed Wiring Boards and Parts Location .............. 69

5-7. Semiconductors ........................................................ 74

6. EXPLODED VIEWS

6-1. Picture Tube ............................................................. 77

6-2. Chassis ..................................................................... 78

7. ELECTRICAL PARTS LIST....................................... 79

4. CIRCUIT ADJUSTMENT

4-1. Adjustments with Commander ................................ 29

4-2. Adjustment Method ................................................. 30

4-3. Picture Quality Adjustments.................................... 35

4-4. Deflection Adjustment ............................................. 00

4-5. H-Trapezoid Adjustment ......................................... 00

4-6. A Board Adjustment After IC003 (Memory)

Replacement ............................................................. 35

4-7. Picture Distortion Adjustment ................................. 36

– 3 –

KV-XG25M50

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”.

SELF DIAGNOSTIC FUNCTION

Diagnostic

Item

Description

• Power does not turn on

• +B overcurrent (OCP) or overvoltage (OVP)

• Vertical deflection stopped

• Horizontal deflection overdrive

• White balance failure (no PICTURE)

• Micro reset

No. of times

STANDBY/TIMER

lamp flashes

Does not light

2 times

5 times

—

Self-diagnostic

display/Diagnostic

result

—

002:000 or 002:001~255 003:001~255 004:001~255

at the same time

005:000 or 005:001~225

101:00 or

101:001~225

Probable

Cause

Location

• Power cord is not plugged in.

• Fuse is burned out F8601 (B6)

• H.OUT Q511 is shorted. (A board)

• IC1800 is shorted. (C6 board)

• -13V is not supplied. (A board)

• IC 503 faulty (A board)

• G2 is improperly adjusted.

(Note 2)

• CRT problem.

• Video OUT is faulty. (C6

board)

• IC301 is faulty. (A board)

• No connection A board to

C6 board.

• Discharge CRT (C6 Board)

• Static discharge

• External noise

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.

• Vertical deflection pulse is stopped.

• Power line is shorted or power supply is stopped.

• No raster is generated.

• CRT cathode current

detection reference pulse output is small.

• 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.

– 4 –

2. DISPLAY OF STANDBY/TIMER LIGHT FLASH COUNT

2 times

5 times

KV-XG25M50

RM-952

Lamp ON 0.3 sec.

Lamp OFF 0.3 sec.

Lamp OFF 3 sec.

STANDBY/SLEEP lamp

Diagnostic Item Flash Count* +B overcurrent/overvoltage 2 times Vertical deflection stopped

White balance failure 5 times

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

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.

– 5 –

KV-XG25M50

RM-952

4. SELF-DIAGNOSTIC SCREEN DISPLAY

For errors with symptoms such as “power sometimes shuts off” or “screen sometimes goes out” that cannot be confirmed, 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

Self-Diagnosis screen display

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

SELF DIAGNOSTIC

002 : 000 003 : 000 004 : 000 005 : 001

101 : 000

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

Numeral "1" means a fault has been detected.

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 –

6. SELF-DIAGNOSTIC CIRCUIT

KV-XG25M50

RM-952

FROM

CRT

FROM

[+B] Q604 C6

[V] Q509/507

IC301

Y/CHROMA JUNGLE

IK-IN

MP/

18 51

PROTECT

SDA

4635

IC001

SYSTEM

IO-8DAT

O-LED

IO-SDAT

MEMORY

B-DAT

54521

IC003

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

and the voltage to pin 18 of IC301 should go down 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 Q509 and IC001

shut down the power supply.

[Verticaldeflectionovercurrent] Occurs when an overcurrent on V drive line is detected by Q507. Power supply will be

shut down when detect this by IC001.

[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.)

– 7 –

The operating instruction mentioned here are partial abstracts

WARNING

• Dangerously high voltages are present inside the TV.

• Operate the TV only between 220 – 240 V AC.

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.

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

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.

Pull the power cord out by the plug. Do not pull the power cord itself. Disconnect the TV before moving it or if you are not going to use it for several days.

Using Your New TV

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

Do not place any objects on the TV.

WARNING (continued)

from the Operating Instruction Manual. The page numbers of the Operating Instruction Manual remain as in the manual.

KV-XG25M50

RM-952

SECTION 1

GENERAL

– 8 –

Using Your New TV

Getting Started

Step 1

Connect the antenna

If you wish to connect a VCR, see the Connecting a VCR diagram below.

Using Your New TV

IEC connector (not supplied)

Rear of TV

Connecting a VCR

To watch the video input, press t (see page 13).

: Signal flow

Antenna cable (not supplied)

(yellow)

-L (MONO)(white)

-R (red)

To video and audio outputs

Audio/Video cable (not supplied)

To 8 (antenna)

To antenna output

: Signal flow

VCR

1 or 2 (video input)

Rear of TV

VIDEO

VIDEO IN

VIDEO OUT

AUDIO

Using Your New TV

Step 2

Note

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

Front of TV

Notes

• If you connect a monaural VCR, connect the yellow plug to

(the

yellow jack) and the black plug to

-L (MONO) (the white jack).

• If you connect a VCR to the 8 (antenna) terminal, preset the signal

output from the VCR to the program number 0 on the TV.

• When no signal is input from the connected video equipment, the TV screen becomes blue.

KV-XG29M61/XG29M50/XG25M50 only

• Do not connect video equipment to the t 2 (video input) jacks at the front and the rear of your TV at the same time; otherwise the picture will not be displayed properly on the screen.

CAUTION

• Do not connect 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.

Insert the batteries into the remote

Step 3

Preset the channels automatically

Tips

• If you want to stop automatic channel presetting, press SELECT twice.

• If your TV has preset an unwanted channel or cannot preset a particular

channel, then preset your TV manually (see page 10).

Note

• During automatic channel presetting, your TV screen will indicate “B/G” , “I”, “D/K” or “M” for the TV system.

AUTO

PROGR

VHF LOW AUTO

L(MONO) R

PROGR

SELECT

AUTO

PROGR

– 9 –

KV-XG25M50

RM-952

Using Your New TV

Connecting optional components

You can connect optional audio/video components, such as a VCR, multi disc player, camcorder, video game or stereo system.

To watch the video input of the connected equipment, press t (see page 13).

Connecting a camcorder/video game equipment using the t (video input) jacks

Notes

KV-XA21M61/XA21M50 only

• You can also connect video equipment to the t 1 (video input) jack at

the rear of your TV.

KV-XG29M61/XG29M50/XG25M50 only

• You can also connect video equipment to the t 1 or 2 (video input) jacks

at the rear of your TV.

• Do not connect video equipment to the t 2 (video input) jacks at the

front and the rear of your TV at the same time; otherwise the picture will not be displayed properly on the screen.

Connecting audio/video equipment using the T (monitor output) jacks

Front of TV

Camcorder

Video game equipment

To video and audio outputs

: Signal flow

(video input)

Audio/Video cable (not supplied)

(yellow)

-L (MONO)

(white)

-R (red)

Rear of TV

To antenna output

To video and audio inputs

Audio system

To audio inputs

VCR

: Signal flow

Antenna cable (not supplied)

Audio/Video cable (not supplied)

(

MONO

)

L(MONO) R

PROGR

SELECT

AUTO PROGR

To T (monitor output)

Using Your New TV

Securing the TV

To prevent the TV from falling, secure the TV using one of the following methods:

With the supplied screws, attach the band to the TV stand and to the rear of the TV using the provided hole.

Put the cord or chain through the clamps to secure the TV against a wall or pillar.

Note

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

20 mm

3.8 mm

– 10 –

KV-XG25M50

RM-952

Using Your New TV

Presetting channels

You can preset up to 100 TV channels in numerical sequence from program number 1 using the remote and the buttons on your TV as well.

Presetting channels automatically

Press ! to turn on the TV.

Press AUTO PROGR.

Note

• During automatic channel presetting, your TV screen will indicate

“B/G” ,

“I”, “D/K” or “M” for the TV system.

To preset channels automatically from a specified program number

(1) Press SELECT until

“AUT

O PROGRAM” appears.

(2) Press + or –.

The on-screen display will start flashing.

(3) Press PROGR +/– or the number buttons until the desired program number

appears.

(4) Press + or –.

L(MONO) R

PROGR

SELECT

AUTO PROGR

AUTO

PROGR

continued

JUMP

SOUND

MODE

FAVORITE

PROGR

VHF

LOW

AUTO

Number buttons

~/1

SELECT

2 +/–

PROGR +/–

+ or –

PIC MODE

Using Your New TV

Presetting channels manually

Press SELECT until “MANUAL PROGRAM” appears.

Press + or –.

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

Press + or – until the desired channel picture appears.

Press SELECT.

Note

• If you preset a locked program number, that particular program number will be unlock automatically (see page 19).

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.

(2) Press + or – to select the appropriate

TV system until the picture or sound quality is optimal.

Presetting channels (continued)

MANUAL PROGRAM

SELECT

VHF

LOW

B/G

-/--

PROGR

SELECT

B/G

I D/K

TV SYS: B/G

– 11 –

KV-XG25M50

RM-952

KV-XG25M50

Using Your New TV

To change the color system setting

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

(1) Press SELECT until

“COLOR SYS” appears.

(2) Press + or – to select the appropriate

color system until the color is optimal.

Tip

• Normally set “COLOR SYS” to “AUT

O”.

Skipping program numbers

Press PROGR +/

– or the number buttons until the unused or unwanted

program number appears.

Press SELECT until

“MANUAL PROGRAM

” appears.

Press + or –.

Press PIC MODE.

Press SELECT.

To restore the skipped program number again

Preset the channel automatically or manually.

Tip

• You can also use SELECT and 2 +/– on the TV to preset channels and

skip program numbers.

To use the fine tuning (FINE) function

The fine tuning (FINE) function may help to reduce the following problems: incomplete Teletext display (KV-XG29M61/XA21M61 only), 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 – on the remote control once. (4) Press

to display “FINE” on the scr

een.

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

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

(6) Press SELECT to return to normal screen.

COLOR SYS: AUTO

AUTO

PAL SECAM

NTSC 3.58NTSC 4.43

Using Your New TV

Watching the TV

This section explains functions used while watching the TV. Most operations can be done using the remote.

Press ! to turn on the TV.

When the TV is in the standby mode (the 1 indicator on the TV is lit red), press

1 on the

remote or PROGR +/

– on

the TV.

Press PROGR +/

– or the number buttons to select the program number.

For double digit numbers, press -, then the number (e.g., for 25, press -, then 2 and 5).

Press 2 +/– to adjust the volume.

indicator

t a

Number buttons

SELECT

+/–

PROGR +/–

+ or –

JUMP

L(MONO) R

PROGR

SELECT

AUTO PROGR

PROGR

SELECT

AUTO

PROGR

JUMP

SOUND

MODE

FAVORITE

PROGR

-/--

PROGR

RM-952

– 12 –

Using Your New TV

Turn off temporarily

Turn off completely

Mute the sound

Watch the video input (VCR, camcorder, etc.)

Jump back to the previous program number

Display the on-screen information*

Adjust the volume of all program numbers automatically

Adjust the picture position when it is not aligned to the TV screen

Additional tasks

* The picture, sound, and either the program number or video input are

displayed. The on-screen display for the picture and sound information disappears after about three seconds.

Changing the on-screen display language

Press SELECT until “LANGUAGE /

: ENGLISH”appears on the screen.

Press + or – to select “

“.

Tip

• You can also use SELECT and 2 +/– on the TV to select the on-screen

display language.

PIC ROTATION

LANGUAGE / : ENGLISH

SELECT

/ LANGUAGE:

continued

Press

1. The 1 indicator on the TV lights up red.

! on the TV.

t to select “VIDEO 1” or “VIDEO 2”. To return to the TV program, press a.

JUMP.

SELECT repeatedly until

“INTELLIGENT VOL

”

appears, then press + or – to select “ON”. To cancel, select “OFF”.

SELECT repeatedly until

“PIC ROT

ATION” appears, then press + or – to adjust the alignment of the picture position.

The

icon on the screen flashes while adjusting.

Using Your New TV

Setting the Wake Up timer

Press

until the desired

period of time appears.

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

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

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

The

indicator on the TV lights up orange.

To cancel the Wake Up timer

Press

until “WAKE UP TIMER: OFF” appears or turn off the TV’s

main power.

Note

• 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 the standby mode. To continue watching the TV, press any button or control on the TV or the remote.

Setting the Sleep timer

Press

until the desired

period of time appears.

The Sleep timer starts immediately after you have set it.

To cancel the Sleep timer

Press

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

WAKE UP TIMER:10M

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

Watching the TV (continued)

– 13 –

KV-XG25M50

RM-952

Advanced Operations

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 and sound modes

To select the picture mode

Press PIC MODE repeatedly until you get the desired picture mode.

Select To

“DYNAMIC” receive high contrast pictures.

“STANDARD” receive normal contrast pictures.

“SOFT” receive mild pictures.

To select the sound mode

Press SOUND MODE repeatedly until you get the desired sound mode.

Select To

“DYNAMIC” listen to dynamic and clear sound that emphasizes the low and

high sound.

“DRAMA” listen to sound that emphasizes vocals and background music.

“SOFT” receive soft sound.

Advanced Operations

SOUND

MODE

FAVORITE

PROGR

STANDARDDYNAMIC

SOFT

PIC MODE

≥

DYNAMIC

≥

DRAMA

≥

SOFT

SOUND

MODE

Advanced Operations

SOUND MODE

PIC MODE

SELECT + or –

continued

Advanced Operations

Adjusting the picture and sound settings

Press SELECT until the desired setting appears.

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

Press + or – to adjust the item.

To adjust other items, repeat steps 1 to 2.

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

Notes

• When you select a picture or sound mode, the adjusted settings will be reset according to the selected mode.

• You can also use SELECT and 2 +/– on the TV to adjust the picture and sound settings.

SELECT

PICTURE 60

PICTURE COLOR

BRIGHT

HUE*

BALANCE TREBLE

BASS

SHARP

Customizing the picture and sound (continued)

– 14 –

KV-XG25M50

RM-952

Advanced Operations

Selecting the surround mode

Press SELECT repeatedly until “SURROUND” appears.

Press + or – to select the desired surround sound.

Select To

“MOVIE” listen to sound that spreads out over a large area, giving the feeling

of being at a movie theatre.

“MUSIC” listen to the sound that gives the feeling of being at a live concert.

“OFF” turn off the surround sound.

SURROUND: MOVIE

SELECT

MUSICMOVIE

OFF

KV-XA21M61/XA21M50

Press SELECT repeatedly until “SURROUND” appears.

Press + or – to select “ON”.

To turn off the surround mode, select “OFF” .

SURROUND: ON

SELECT

OFF

Advanced Operations

Viewing your favorite channels

You can display six of your favorite channels for quick and easy selection. You can program the favorite channel as well.

Selecting a favorite channel

Press FAVORITE.

Press the number button from 1 to 6 to select the desired favorite channel.

When you use the

“F

AVORITE CH”

feature for the first time, six preset channels will appear.

JUMP

SOUND

MODE

FAVORITE

PROGR

FAVORITE

+ or –

PROGR +/–

Number buttons

Programming the favorite channel

Press PROGR +/

– or number buttons to select the program number you want to program (e.g., program number 8).

Press SELECT until

“FAVORITE CH SETUP

”

appears.

Press + or – to select the favorite channel you want to program (e.g., 3).

Press SELECT.

The selected favorite channel (e.g., 3) turns red for about one second.

To program other favorite channels, repeat steps 1 to 4.

FAVORITE

FAVORITE CH

1PR01 2 PR02 3 PR03 4PR04 5 PR05 6 PR06

-/--

PROGR

FAVORITE CH SETUP :

SELECT

FAVORITE CH SETUP :

SELECT

– 15 –

KV-XG25M50

RM-952

Advanced Operations

Blocking the channels (CHILD LOCK)

You can lock some program numbers to prevent children from watching certain channels, by using the buttons on the remote control.

Select the program number you want to lock.

Press SELECT until

“CHILD LOCK” appears on the screen.

Press + or – to select “ON”.

The

symbol appears on

the screen.

To cancel, press + or – to select “OFF”. The symbol disappears from the screen.

Note

• If you preset a locked program number, that particular program number will be unlocked automatically (see page 9).

CHILD LOCK: ON

CHILD LOCK: OFF

SELECT

JUMP

SOUND

MODE

FAVORITE

PROGR

SELECT

+ or –

– 16 –

KV-XG25M50

RM-952

Additional Information

Troubleshooting Shortcuts

For better viewing, please check the following connections.

• Snowy • Distorted • Noisy/ picture picture distorted

sound

Wall antenna terminal

UHF

VHF

Booster

VCR

Check the antenna direction.

Incorrect antenna direction may cause:

Check the antenna type.

Wrong type of antenna may cause:

• No picture

• Snowy picture

Check connection on the wall antenna terminal.

Loose connection may cause:

•

Snowy picture

• Distorted sound

Check if you need booster to increase signal level.

Too strong signal level may cause:

•

Distorted picture

• Noisy sound

Antenna connection

Additional Information

P166 SECTEXT 166 FR1 MAR 03:59:09

Fom Singapore

To PARIS

To OSAKA

To ROMA

To SYDNEY

Day Dep/Arr Flight Alrcraft

1.6 220/0588 SQ28 747 2 2130/1225 PA115 L15 3 2115/1330 SQ26 747

2.7 2130/0745 SQ24

747

4 2300/0915 AZ487 747

2.5 1000/1715 SQ6 747

4.6 0930/2015 CX522 L10

1 2210/0610 SQ21A 747 2 2100/0835 SQ21A 747

Check connection on the VCR and on the TV.

Loose connection may cause:

• Snowy picture

• Distorted sound

• No picture

For more information, please see Troubleshooting on page 26 or consult your dealer for guidance.

AC Connection

Check connection on the AC socket.

Loose connection may cause:

• no power

• no picture with no sound

Additional Information

Connection

to TV

• Double image • Missing picture Teletext

characters

(KV-XG29M61/ XA21M61 only)

– 17 –

KV-XG25M50

RM-952

Additional Information

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

• Press SELECT until

“MANUAL

PROGRAM” appears on the screen, then preset the channel again.

• Check the antenna type (VHF/UHF). Contact a Sony dealer for advice.

• Adjust the antenna direction. Contact a Sony dealer for advice.

• Try using a booster.

• Turn off or disconnect the booster if it is

in use.

• If the sound of all the channels are noisy, check the TV system (TV SYS) setting, then press AUTO PROGR to preset the channels again.

• If the sound of some channels are noisy, select the channel, then select the appropriate TV system (TV SYS).

•

If the sound of some channels are noisy, select the channel, then press A/B to select the main sound (KV-XG29M61/XA21M61 only).

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

• Press ?/1 (power).

• Press ! (main power) on the TV to turn

off the TV for about five seconds, then turn it on again.

Snowy picture

Noisy sound

Distorted picture

Noisy sound

Good picture

Noisy sound

No picture

No sound

Troubleshooting

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

Possible causeSymptom

Solutions

• Connection is loose or the cable is damaged.

• Channel presetting is inappropriate or incomplete.

• The antenna type is inappropriate.

• The antenna direction is inappropriate.

• Signal transmission is low.

• Broadcast signals are too strong.

• The TV system setting or channel presetting is inappropriate or incomplete.

• The selected sound is inappropriate.

• The power cord, antenna or VCR is not connected.

• The TV is not turned on.

Page

–

Additional Information

Good picture

No sound

Dotted lines or stripes

Double images or “ghosts”

No color

Abnormal color patches

TV cannot receive stereo broadcast signal (Not used for this models)

• Press 2 + to increase the volume level.

• Press % to cancel the muting.

• Press A/B until a better sound is heard

(KV-XG29M61/XA21M61 only).

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

• Adjust the antenna direction for minimum interference. Contact a Sony dealer for advice.

• Use a highly directional antenna.

• Use the fine tuning (FINE) function.

• Adjust the antenna direction. Contact a

Sony dealer for advice.

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

• Press SELECT until

“COLOR” appears

on the screen, then press + or – to adjust the color level.

• Press SELECT until

“COLOR SYS ”

appears on the screen, then check the color system setting (usually set this to

“AUTO”).

• Adjust the antenna direction. Contact a

Sony dealer for advice.

• Keep external speakers or other electrical equipment away from the TV. Do not move the TV while the TV is turned on. Press ! (main power) on the TV to turn off the TV for about five minutes, then turn it on again.

• Press A/B until “AUTO” appears on the screen.

Possible cause

Symptom

Solutions

continued

• The volume level is too low.

• The sound is muted.

• Broadcast signal has a

transmission problem.

• There is local interference from cars, neon signs, hair dryers, power generators, etc.

• Broadcast signals are reflected by nearby mountains or buildings.

• The antenna direction is inappropriate.

• Use of a booster is inappropriate.

• The color level setting is too low.

• The color system setting is inappropriate.

• The antenna direction is inappropriate.

• The magnetic disturbance from external speakers or other equipment, or the direction of the earth’s magnetic field may affect the TV.

• The stereo reception setting is inappropriate.

–

Page

– 18 –

KV-XG25M50

RM-952

Additional Information

–

Stereo broadcast sound switches on and off or is distorted.

The sound switches between monaural and stereo frequently. (Not used for this models)

“100” appears on the top of the screen and there is no Teletext display. (Not used for this models)

Teletext display is incomplete (snowy picture or double images). (Not used for this models)

Picture slant

Lines moving across the TV screen.

The 1 indicator on your TV flashes red a number of times between 3-second intervals.

TV cabinet creaks.

A “boom” sound is heard when the TV is turned on.

Troubleshooting (continued)

Possible causeSymptom Solutions

• Connection is loose or

the cable is damaged.

• The antenna direction

is inappropriate.

• Broadcast signal has a

transmission problem.

• The channel carries no

Teletext broadcast.

• Connection is loose or

the cable is damaged.

• The antenna direction

is inappropriate.

• Signal transmission is

too low.

• The magnetic

disturbance from external speakers or other equipment, or the direction of the earth’s magnetic field may affect the TV.

•

There is interference

from external sources, e.g., heavy machineries, nearby broadcast station.

• Your TV may need

service.

•

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.

Page

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

•Adjust the antenna direction. Contact a Sony dealer for advice.

•Press A/B until a better sound is heard.

—

•Check the antenna cable and connection

on the TV, VCR, and at the wall.

•Adjust the antenna direction. Contact a Sony dealer for advice.

•Try using a booster.

•Use the fine tuning (FINE) function.

•Keep external speakers or other electrical

equipment away from the TV.

•Press SELECT until

“PIC ROT

ATION” appears on the screen, then press + or – to align the picture to the TV screen.

•Use the fine tuning (FINE) function.

•Contact your nearest Sony service center.

—

Additional Information

L(MONO) R

PROGR

SELECT

AUTO PROGR

Self-diagnosis function

Your TV is equipped with a self-diagnosis function. If there is a problem with your TV, the 1 indicator flashes red. The number of times the 1 indicator flashes indicates the possible causes.

Check that the 1 indicator flashes red a number of times between 3-second intervals.

Count the number of times the 1 indicator flashes.

Press ! (main power) to turn off your TV.

Inform your nearest Sony service center about the number of times the 1 indicator flashes. Be sure to note the model name and serial number located on the rear of your TV.

Front of TV

1 indicator

– 19 –

KV-XG25M50

RM-952

Additional Information

Overview of controls

TV front panel

PROGR

SELECT

AUTO PROGR

(

MONO

)

PageFunction

Button

Preset channels automatically.5 Select the desired item. 11 Select program number. 12 Turn off completely or turn on the TV.12 Adjust volume. 12 Standby indicator.12 Select TV or video input. 13 Wake Up indicator.14 Stereo/bilingual indicator.20

Headphone jack. –

AUTO PROGR SELECT PROGR +/–

! 2 +/–

(KV-XG29M61/XA21M61 only)

Additional Information

Remote Control

JUMP

SOUND

MODE

FAVORITE

PROGR

The names/symbols of buttons on the remote are indicated in different colors to represent the available functions.

Label color

White

Green

Button function

For general TV operations

For Teletext operations

PageButton Function

SELECT +/– PROGR +/– 0 – 9,

+/–

?/1

JUMP

Timer operations

PIC MODE SOUND MODE FAVORITE Stereo/bilingual operations

(Not used for this models) A/B Teletext operations

(Not used for this models)

(red, green,

yellow, blue)

Select the desired item. 10 Adjust value. 10 Select program number. 12 Input numbers. 12 Adjust volume. 12 Turn off temporarily or 12

turn on the TV. Select TV or video input. 13 Display the TV program. 13 Mute the sound. 13 Display on-screen information.

Jump to previous program number. 13

Set TV to turn on automatically.

Set TV to turn off automatically.

14 Select picture mode. 15 Select sound mode. 15 Display favorite channels. 18

Select stereo/bilingual mode. 20

Display Teletext broadcast. 22

Display Teletext service contents.

23 Stop Teletext display from scrolling.

23 Reveal concealed information. 23 Enlarge the Teletext display. 23 Show TV screen while 23

waiting for Teletext page. Access a FASTEXT menu. 23

– 20 –

KV-XG25M50

RM-952

SECTION 2

2 Eight screws (+BVTP 4 × 16)

3 Three screws (+BVTP 4 × 16)

1 Rear cover

Three screws (Step Tapping)

1 Chassis assy

Control button

Two screws (+BVTP 3 × 12)

One screw (+BVTP 3 × 12)

DISASSEMBLY

2-1. REAR COVER REMOVAL

– 21 –

2-4. SERVICE POSITION

2-2. SPEAKER REMOVAL

2-5. REPLACEMENT OF PARTS

For replacement of the Control Button and Light Guide, unscrew them, exchange with the new parts, and fix them with screws (+BVTP) respectively.

2-5-1. REPLACEMENT OF CONTROL BUTTON

2-3. CHASSIS ASSY REMOVAL

2-5-2. REPLACEMENT OF LIGHT GUIDE

KV-XG25M50

RM-952

KV-XG25M50

3 Two connectors

4 Two screws (+BVTAP 3

× 12)

1 Two connectors

4 Four claws

5 H2 Board

2 Two connectors

4 B6 Board

5 A Board

1 Three screws

(+BVTAP 3 × 12)

2 Three screws (+BVTAP 3

× 12)

3 Two claws

4 Terminal bracket

1 Two screws

(+ BVTP 3 × 12)

2 One screw (+ BVTP 4 × 16)

2-6. TERMINAL BRACKET REMOVAL

– 22 –

2-7. H2 BOARD REMOVAL

2-8. A AND B6 BOARDS REMOVAL

RM-952

2-9 PICTURE TUBE REMOVAL

Anode button

!º Four DGC clips

!¢ Degaussing coil

9 Four claws

1 Three screws

(Step Tapping)

!™ Two screws

(Tapping)

5 Chassis assy

8 Deflection

yoke

7 Neck assy

6 C6 board

4 Anode cap

!¡ Picture tube

Cushion

!™ Two screws

(Tapping)

!£ Tension

spring

DGC holder

Cushion (50 × 250) DGC

2 Speaker

1 Three screws

(Step Tapping)

•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

– 23 –

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

2 Using a thumb 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-caps 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.

KV-XG25M50

RM-952

+ 51 hidden pages