SONY KV-25FX20A, KV-25FX20B, KV-25FX20D, KV-25FX20E, KV-25FX20K Service Manual

...

SERVICE MANUAL FE-1A CHASSIS

MODEL

COMMANDER DEST CHASSIS NO.

KV-25FX20A KV-25FX20B KV-25FX20D KV-25FX20E KV-25FX20K KV-25FX20R

RM-887 Italian SCC-Q32B-A

RM-887 French SCC-Q33B-A

RM-887 AEP SCC-Q31B-A

RM-887 Spanish SCC-Q34B-A

RM-887 OIRT SCC-Q36C-A

RM-887 OIRT SCC-Q36D-A

MODEL

COMMANDER DEST CHASSIS NO.

KV-29FX20A KV-29FX20B KV-29FX20D KV-29FX201D KV-29FX20E KV-29FX201E KV-29FX20K KV-29FX20R KV-29FX20U

RM-887 Italian SCC-Q32A-A

RM-887 French SCC-Q33A-A

RM-887 AEP SCC-Q31A-A

RM-887 AEP SCC-Q31E-A

RM-887 Spanish SCC-Q34A-A

RM-887 ESP SCC-Q34E-A

RM-887 OIRT SCC-Q36B-A

RM-887 OIRT SCC-Q36A-A

RM-887 UK SCC-Q35A-A

MICROFILM

TRINITRON

COLOR TV

ITEM MODEL Tele vision System Stereo System Channel Coverage Color System

Italian B/G/H GERMAN Stereo

French B/G/H, D/K, L, I GERMAN/NICAM

AEP B/G/H GERMAN Stereo

Spanish B/G/H, D/K GERMAN/NICAM

OIRT B/G/H, D/K

UK I NICAM Stereo UHF : B21-B69

Stereo

KV-25FX20K/29FX20K GERMAN/NICAM Stereo KV-25FX20R/29FX20R GERMAN Stereo

ITALIA VHF : A-H2 (C) UHF : 21-69 PAL B/G/H VHF : E2-E12 UHF : E21-E69 CABLE TV (1) : S1-S41 CABLE TV (2) : S01-S05, M1-M10, U1-U10

L VHF : F02-F10 UHF : F21-F60 CABLE : B-Q B/G/H VHF : E2-E12 UHF : E21-E69 CABLE TV (1) : S1-S41 CABLE TV (2) : S01-S05, M1-M10, U1-U10 ITALIA VHF : A-H2 (C) UHF : 21-69 I UHF : B21-B69

PAL B/G/H VHF : E2-E12 UHF : E21-E69 CABLE TV (1) : S1-S41 CABLE TV (2) : S01-S05, M1-M10, U1-U10 ITALIA VHF : A-H2 (C) UHF : 21-69 D/K VHF : R01-R12 UHF : R21-R69

PAL B/G VHF : E2-E12 UHF : E21-E69 CABLE TV (1) : S1-S41 CABLE TV (2) : S01-S05, M1-M10, U1-U10 ITALIA VHF : A-H2 (C) UHF : 21-69

B/G/H VHF : E2-E12 UHF : E21-E69 CABLE TV (1) : S1-S41 D/K VHF : R01-R12 UHF : R21-R69

PAL, SECAM NTSC4.43, NTSC3.58 (VIDEO IN)

PAL NTSC4.43, NTSC3.58 (VIDEO IN)

MODEL 25FX20A 25FX20B 25FX20D 25FX20E 25FX20K 25FX20R

Power Consumption 100W 100W 100W 100W 100W 100W

MODEL 29FX20A 29FX20B 29FX20D 29FX20E 29FX20K 29FX20R 29FX20U

Power Consumption 120W 120W 120W 120W 120W 120W 150W

[PICTURE TUBE]

KV-25FX20 FD Trinitron

Approx. 63cm (25 inches) (Approx. 59cm picture measured diagonally) 110 degree deflection

KV-29FX20 FD Trinitron

Approx. 72cm (29 inches) (Approx. 68cm picture measured diagonally) 110 degree deflection

Input/Output Terminals

[FRONT]

Video input - phono jack Audio inputs - phono jacks

S Video input - 4 pin din

Headphone jacks : stereo minijack

Sound output 2 x 14W (Music Power) Subwoofer 30W (Music Power) Power requirements 220 - 240V Dimensions KV-25FX20 Approx 655x509x476mm (w/h/d) KV-29FX20 Approx 746x569x516mm (w/h/d) Weight

[REAR]

21-pin Euro connector (CENELEC standard).

- Inputs for A ud i o and Vi deo signals.

- Inputs for RGB.

- Outputs of TV Video and Audio si gnals.

21-pin Euro connector.

- inputs for Audio and Video signals.

KV-25FX20 Approx 37kg KV-29FX20 Approx 47.5kg Supplied accessories RM-887 Remote Commander (1)

IEC designated R6 battery (2)

Other features NICAM*, FASTEXT, TOPTEXT

(KV-25FX20B/25FX20E/25FX20K/

KV-29FX20B/29FX20E/29 FX20K/ KV-29FX20U only)

- inputs for S Video.

- outputs for Audio and Video signals (selectable). Phono Jack

- Outputs for Audio Signals

[RM-887]

Remote control system Infrared control Power requirements 3V dc

2 batteries IEC designation

R6 (size AA) Dimensions Approx 44x209x23mm (w/h/d) Weight Approx 89g (Not including battery)

Design and specifications are subject to change without notice.

Model Name

Item Pal Comb OFF OFF OFF OFF OFF OFF OFF PIP OFF OFF OFF OFF OFF OFF OFF RGB Priority OFF ON ON ON OFF OFF OFF Woofer Box ON ON ON ON ON ON ON Scart 1 ON ON ON ON ON ON ON Scart 2 ON ON ON ON ON ON ON Front in (3) ON ON ON ON ON ON ON Scart 4 OFF OFF OFF OFF OFF OFF OFF Projector OFF OFF OFF OFF OFF OFF OFF AKB in 16:9 mode ON ON ON ON ON ON ON Norm B/G ON ON ON ON ON ON OFF Norm I OFF ON OFF OFF OFF OFF ON Norm D/K OFF ON OFF ON ON ON OFF Norm AUS OFF OFF OFF OFF OFF OFF OFF

KV-25FX20A

KV-29FX20A

KV-25FX20B

KV-29FX20B

KV-25FX20D

KV-29FX20D

KV-25FX20E

KV-29FX20E

KV-25FX20K

KV-29FX20K

KV-25FX20R

KV-29FX20U

KV-29FX20R

Norm L OFF ON OFF OFF OFF OFF OFF Norm SAT OFF OFF OFF OFF OFF OFF OFF Norm M OFF OFF OFF OFF OFF OFF OFF Teletext ON ON ON ON ON ON ON Nicam Stereo OFF ON OFF ON ON OFF ON Language Preset Italian French German Spanish OIRT OIRT English

WARNING (KV-29FX20U only)

The flexible mai ns lead is supplied connect e d to a B.S. 1363 fused plug having a fuse of 5 AMP capacity. Should the fuse need t o be replaced, use a 5 AMP FUSE approved by ASTA to BS 1362, ie one that c arries the

ASA

mark. IF THE PLUG SUPPLIED WITH THIS APPLIANCE IS NOT SUITABLE FOR THE OUTLET SOCKETS IN YOUR HOME, IT SHOULD BE CUT OFF AND AN APPROPRIATE PLUG FITTED. THE PLUG SEVERED FROM THE MAINS LEAD MUST BE DESTROYED AS A PLUG WITH BARED WIRES IS DANGEROUS IF ENGAGE D IN A LIVE OUTLET SOCKET. When an alte rnative type of plug is used it sho u ld be fitted with a 5 AMP FUSE, otherwise the circuit should be protected by a 5 AMP FUSE at the distribution board.

How to replace the fuse. Open the fuse compartment with a screwdriver blade and replace the fuse.

FUSE

21 pin connector ( 1/ , 2 / )

Pin No 1 2 4 Signal Signal level

1 Audio output B

3 4 Ground (audio) 5 Ground (blue) 6 Audio input A

7 Blue input 0.7 +/- 3dB, 75 ohms positive

8 Function select

9 Ground (green) 10 Open 11 Green Green signal : 0.7 +/- 3dB, 75 ohms,

12 Open 13 Ground (red) 14 Ground (blanking)

_ (S signal Chroma

16 Blanking input

17 Ground (video

18 Ground (video

19 Video output 1V +/- 3dB, 75ohms, positive sync 0.3V

_ Video input

21 Common ground

Connected Not Connected (open) * at 20Hz - 20kHz

(right) Audio output B

(right) Audio output A

(left)

(AV control)

_ _ Red input 0.7 +/- 3dB, 75 ohms, positive

input)

(Ys signal)

output)

input)

_ _ Video input 1V +/- 3dB, 75ohms, positive sync 0.3V

Y (S signal)

(plug, shield)

Standard level : 0.5V rms Output impedence : Less than 1kohm*

Standard level : 0.5V rms Output impedence : More than 10kohm*

Standard level : 0.5V rms Output impedence : Less than 1kohm*

Standard level : 0.5V rms Output impedence : More than 10kohm*

High state (9.5-12V) : Part mode Low state (0-2V) : TV mode Input impedence : More than 10K ohms Input capacitance : Less than 2nF

positive

0.3 +/- 3dB, 75 ohms, positive

High state (1-3V) Low state (0-0.4V) Input impedence : 75 ohms

(-3+10dB)

(-3+10dB) 1V +/- 3dB, 75ohms, positive sync 0.3V

(-3+10dB)

Pin No.

1 2 3 4

Signal Ground Ground Y (S signal) input C (S signal) input

1V 3dB 75 ohm, positive Sync. 0.3V -3 + 10dB

0.3V 3dB 75 ohm, positive Sync.

Signal Level

TABLE OF CONTENTS

Section Title Page Section Title Page

Warning and Caution .....................3

FE-1A Self Diagnostic Softwa re .....................6

1. GENERAL

4. CIRCUIT ADJUSTMENTS

4-1. Electrical Adjustments .....................20

4-2. Test Mode 2 ............. .... ....23

Overview of Remote .....................7

Control Butt ons

Manually Tu nin g the TV .....................7

Fine Tuning Channels .....................8

Adjusting the Picture .....................8

Adjusting the Sound .....................9

Using the Sleep Time r .....................9

Viewing Teletext .....................10

Using Optional Equipment .....................10

Troublesho ot ing .....................11

Specification s .....................11

2. DISASSEMBLY

2-1. Rear Cover Removal .....................12

2-2. Chassis Assy Removal ................... ..1 2

2-3. Service Position .....................13

2-4. H Board Removal .....................13

2-5. S1 Board Removal .....................13

2-6. Picture Tube Removal .....................14

2-7. Removal and Replacement of .....................15

the Main - Bracket bottom plates

3. SET-UP ADJUSTMENTS

3-1. Beam Landing .....................16

3-2. Convergence .....................17

3-3. Focus .....................19

3-4. White Balance .....................19

5. DIAGRAMS

5-1. Block Diagram (1) .....................25

Block Diagram (2) .....................29

5-2. Circuit Board Location .....................32

5-3. Schematic Diagrams and

Printed Wiring Boards .....................32

* S1 Board .....................33

* F Board .....................34

* K Board .....................36

* H Board .....................37

* A Board .....................41

* VM Board .....................46

* C Board .....................50

5-4. Semiconductors .....................51

5-5. IC Blocks .....................53

6. EXPLODED VIEWS

6-1. Chassis .....................54

6-2. Picture Tube .....................56

7. ELECTRICAL PARTS LIST .....................57

CAUTION

SHORT CIRCUIT THE ANODE OF THE PICTURE TUBE AND THE ANODE CAP TO THE METAL CHASSIS, CRT SHIELD, OR THE CARBON PAINTED ON THE CRT, AFTER REMOVAL OF THE ANODE CAP

WARNING !!

AN ISOLATING TRANSFORMER SHOULD BE USED DURING ANY SERVICE WORK TO AVOID POSSIBLE SHOCK HAZARD DUE TO LIVE CHASSI S. THE CHASSIS OF THIS RECEI VER IS DIRECTLY CONNECTED TO THE POWER LINE.

SAFETY-RELATED COMPONENT WARNING !!

COMPONENTS IDENTIFIED BY SHADING AND MARKED ON THE SCHEMATIC DIAGRAMS, EXPLODED VIEWS AND IN THE P ARTS LIST ARE CRITICAL FOR SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PAR T NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.

ATTENTION

APRES AVOIR DECONNECTE LE CAP DE’LANODE, COURT-CIRCUITER L’ANODE DU TUBE CATHODIQUE ET CELUI DE L’ANODE DU CAP AU CHASSIS METALLIQUE DE L’A PPAREIL, OU AU COUCHE DE CARBONE PEINTE SUR LE TUBE CATHODIQUE OU AU BLINDAGE DU TUBE CATHODIQUE.

ATTENTION !!

AFIN D’EVITER TOUT RISQUE D’ELECTROCUTION PROV ENA NT D’UN CHÁSSIS SOUS TENTION, UN TRANSFORMATEUR D’ISOLEMENT DOIT ETRE UTILISÈ LORS DE TOUT DÈPANNAGE. LE CHÁSSIS DE CE RÈCEPTEUR EST DIRECTMENT RACCORDÈ Á L’ALI MENTATION SECTEUR.

ATTENTION AUX COMPOSANTS RELATIFS Á LA

SÈCURITÈ !!

LES COMPOSANTS IDENTIFIÈS PAR UNE TRAME ET PAR UNE MARQUE SUR LES SCHÈMAS DE PRINCIPE, LES VUES

EXPLOSÈES ET LES LISTES DE PIECES SONT D’UNE IMPORTANCE CRITIQUE POUR LA SÈCURITÈ DU FONCTIONNEMENT, NE LES REMPLACER QUE PAR DES COMPSANTS SONY DONT LE NUMÈRO DE PIÈCE EST INDIQUÈ DANS LE PRÈSENT MANUEL OU DANS DES SUPPLÈMENTS PUBLIÈS PAR SONY.

StBy LED

ON ON ON

OFF OFF

(ON SCREEN DISPLAY)

(DIGIT 5) (VOLUME -)

(TV)

FE-1A SELF DIAGNOSTIC SOFTWARE

The identification of error s with in the F E- 1A ch a ssis i s trig ger ed in one of tw o ways :- 1: Busy or 2: Device failure to respond to IIC. In t he event of one of these situati ons arising the so ftw are will first try to release the b u s if b usy (Fa ilure to do so will re port w ith contin uous flashing LED) an d then communicate with each device in turn to establish if a de vice is f au lty. If a device is found to be faulty the rele vant device number will b e dis played through the LED (Series of flashes which must be counted) See Table 1., non fatal errors are reported using this method. Each time the software detects an error i t is stored within the NVM. See Table 2.

Table 1

ERROR

No error 00 Not allowed (may be confused with Sircs response

flash!) Protection circuit trip < ANY TIME > 02 Reserved 03 No vertical sync 04 AKB 05 IIC bus clock and/or data lines low at Power ON 06 NVM no IIC bus acknowledge at Power ON 07 Jungle controller no IIC acknowledge at Power ON 08 Tuner no acknowledge at Power ON 09 Sound processor no acknowledge at Power ON 10

Flash Timing Example : e.g. error number 3

LED ERROR COUNT

How to enter into Table 2

1. Turn on the main po w er switc h of the TV set and enter into the

‘Standby Mode’.

2. Press the following sequence of buttons on the Remote Commander.

3. The following table will be displayed indicating the error count.

Table 2

Error Times 2 -

3 4 5 6 7 8 9 10 -

Note: To clear the error count data press ‘80’ on the Remote

commander.

887

PROGR

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Getting Started - Overview

Overview of Remote Control Buttons

To Temporarily Switch Off TV

Press to temporarily switch off TV (the standby indicator on TV lights up). Press again to switch on TV from standby mode.

To save energy we recommend switching off completely when TV is not in use.

After 15-30 minutes without a TV signal and without any button being pressed, the TV switches automatically into standby mode.

Selecting Input source

Press repeatedly until the desired input symbol of the source appears on the TV screen.

Back to the channel last watched

Press to watch the last channel selected (watched for at least 5 seconds).

Displaying the menu system

Press to display the menu on the TV screen. Press again to remove the menu display from the TV screen.

Menu selection

Scroll Up Scroll Down Previous menu or selection Next menu or selection

OK Confirms your selection

Selecting Screen format

Press to view programmes in 16:9 mode. Press again to return to 4:3 mode.

This button only works in Teletext mode.

Selecting channels

Press to select the next or previous channel.

Muting the Sound

Press to mute TV sound.

Press again to restore the sound.

Displaying On Screen Information

Press to display all on-screen indications. Press again to cancel. +.--+++++-++++

Selecting channels

Press to select channels.

For double-digit programme numbers, e.g. 23, press -/-- first, then the buttons 2 and 3. If you enter an incorrect first digit, this should be corrected by entering another digit (0-9) and then selecting -/-- button again to enter the programme number of your choice.

+++++++++++++++...

Selecting TV mode

Press to switch off Teletext or video input.

+++++++++++++++++...

Selecting Teletext

Press to switch on Teletext.

Selecting Sound mode

Press to change the sound mode.

+++++++++++++++++...

Selecting Picture mode

Press to change the picture mode.

+++++++++++++++++...

Adjusting TV Volume

Press to adjust the volume of the TV.

Besides TV functions, all coloured buttons are also used for Teletext operation. For more details, please refer to the "Teletext" section of this instruction manual.

Advanced Operation - Advanced Presetting

Manually Tuning the TV

Use this function to preset channels or a video input source one by one to the programme order of your choice.

1 Press the MENU button on the remote control to display the menu

on the TV screen.

2 Press the button to select the symbol, then press the button

to enter to the SET UP menu.

3 Press the button to select MANUAL PROGRAMME, then press

the button.

4 With the cursor highlighting PROGRAMME, press the button

and then, press the

or button to select on which programme

number you want to preset a channel. Press the OK button.

5 Press the button to select CHANNEL, then press the button.

Press

or button to select the channel tuning, "C" for terrestrial

channels or "S" for cable channels. Press the button.

6 Press the number buttons to enter the channel number of the TV

Broadcast or press the or button to search for the next available channel. If you do not wish to store this channel, press the

or button to

continue searching for the desired channel.

7 If this is the desired channel you wish to store, press the OK button

and then, with the cursor highlighting CONFIRM, press the OK button again.

8 Repeat steps 4 to 7 if you wish to store more channels.

9 Press the MENU button to exit and return to the normal TV screen.

Your TV is now ready for use.

PICTURE CONTROL

CONTRAST BRIGHTNESS COLOUR SHARPNESS HUE RESET

MODE: PERSONAL

PICTURE CONTROL

CONTRAST BRIGHTNESS COLOUR SHARPNESS HUE RESET

MODE: PERSONAL

SET UP

PICTURE ROTATION: LANGUAGE: ENGLISH AUTO PROGRAMME PROGRAMME SORTING MANUAL PROGRAMME

SET UP

PICTURE ROTATION: LANGUAGE: ENGLISH AUTO PROGRAMME PROGRAMME SORTING

MANUAL PROGRAMME

01 I C 21 ON NO OFF

SET UP:

MANUAL PROGRAMME

CONFIRM

PROGRAMME:

SYSTEM: CHANNEL: AFT: SKIP: DECODER:

01 I C 21 ON NO OFF

SET UP:

MANUAL PROGRAMME

CONFIRM

PROGRAMME: SYSTEM:

CHANNEL:

AFT: SKIP: DECODER:

SET UP:

MANUAL PROGRAMME

CONFIRM

PROGRAMME: SYSTEM: CHANNEL: AFT: SKIP: DECODER:

01 I

C 21

ON NO OFF

01 I C 21 ON NO OFF

SET UP:

MANUAL PROGRAMME

CONFIRM

PROGRAMME: SYSTEM: CHANNEL: AFT: SKIP: DECODER:

887

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The operating instructions mentioned here are partial abstracts

SECTION 1 GENERAL

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

Advanced Operation - Advanced Presetting

Fine Tuning Channels

Normally, the automatic fine tuning (AFT) function is operating. If the picture is distorted, however, you can manually fine tune the TV to obtain a better picture reception.

1 Select the channel (TV Broadcast) you wish to fine tune, then press

the MENU button on the remote control to display the menu on the TV screen.

2 Press the button to select the symbol, then press the button

to enter to the SET UP menu.

3 Press the button to select MANUAL PROGRAMME, then press

the

button.

4 Press the button to select AFT , then press the button.

5 Press the or button to adjust the fine tuning (-15 to +15), then

press the OK button.

6 With the cursor highlighting CONFIRM, press the OK button to

store.

7 Press the MENU button to exit and return to the normal TV screen.

8 Repeat steps 1 to 7 to fine tune other channels.

Your TV is now ready for use.

PICTURE CONTROL

CONTRAST BRIGHTNESS COLOUR SHARPNESS HUE RESET

MODE: PERSONAL

PICTURE CONTROL

CONTRAST BRIGHTNESS COLOUR SHARPNESS HUE RESET

MODE: PERSONAL

SET UP

PICTURE ROTATION: LANGUAGE: ENGLISH AUTO PROGRAMME PROGRAMME SORTING MANUAL PROGRAMME

SET UP

PICTURE ROTATION: LANGUAGE: ENGLISH AUTO PROGRAMME PROGRAMME SORTING

MANUAL PROGRAMME

SET UP:

MANUAL PROGRAMME

CONFIRM

PROGRAMME: SYSTEM: CHANNEL: AFT: SKIP: DECODER:

01 I C 21

NO OFF

887

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2 5 8 0

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01 I C 21 ON NO OFF

SET UP:

MANUAL PROGRAMME

CONFIRM

PROGRAMME: SYSTEM: CHANNEL:

AFT:

SKIP: DECODER:

01 I C 21 +2 NO OFF

SET UP:

MANUAL PROGRAMME

CONFIRM

PROGRAMME: SYSTEM: CHANNEL: AFT: SKIP: DECODER:

1 Press the MENU button on the remote control to display the menu

on the TV screen.

2 Press the button to enter to the PICTURE CONTROL menu.

3 Press the or button to select the item you wish to change.

4 With the cursor highlighting the item you wish to change, press the

button.

(Refer to the table below for the effect of each control).

5 Press the / or / button to alter the selected item, then press

the OK button to store the new adjustment.

6 Repeat steps 3 to 5 to alter the other items.

7 Press the MENU button to exit and return to the normal TV screen.

PICTURE CONTROL OPERATION / EFFECT

MODE PERSONAL (for individual settings)

LIVE (for live broadcast programmes) MOVIE (for films)

CONTRAST Less

BRIGHTNESS

* Darker Brighter

COLOUR* Less More SHARPNESS* Softer Sharper HUE

** Greenish Reddish

RESET Resets picture to the factory preset levels.

* Can be only altered if PERSONAL MODE is selected. ** Only avalaible for NTSC colour signal (e.g: US video tapes).

Advanced Operation - Advanced TV Operation

Adjusting the Picture

Although the picture is adjusted at the factory, you can modify it to suit your own taste.

Changing Picture Mode Quickly

1 Press the button on the remote control to directly access the

PICTURE MODE .

2 Press the button to select your desired picture mode

(PERSONAL, LIVE or MOVIE ), then press the OK button.

Advanced Operation - Advanced TV Operation

PICTURE CONTROL

CONTRAST BRIGHTNESS COLOUR SHARPNESS HUE RESET

MODE: PERSONAL

PICTURE CONTROL

CONTRAST BRIGHTNESS COLOUR SHARPNESS HUE RESET

MODE: PERSONAL

PICTURE CONTROL

CONTRAST BRIGHTNESS COLOUR SHARPNESS HUE RESET

MODE: PERSONAL

PICTURE CONTROL

MODE: PERSONAL

CONTRAST

BRIGHTNESS COLOUR SHARPNESS HUE RESET

PICTURE CONTROL

MODE: PERSONAL

CONTRAST BRIGHTNESS COLOUR SHARPNESS HUE RESET

PICTURE MODE:

PERSONAL

PICTURE MODE:

LIVE

PICTURE MODE:

PERSONAL

887

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2 5 8 0

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1 Press the MENU button on the remote control to display the menu

on the TV screen.

2 Press the button to select the symbol, then press the button

to enter to the SOUND CONTROL menu.

3 Press the or button to select the item you wish to change.

4 With the cursor highlighting the item you wish to change, press the

button.

(Refer to the table below for the effect of each control).

5 Press the / or / button to alter the selected item, then press

the OK button to store the new adjustment.

6 Repeat steps 3 to 5 to alter the other items.

7 Press the MENU button to exit and return to the normal TV screen.

SOUND CONTROL OPERATION / EFFECT

MODE PERSONAL (for individual settings)

JAZZ POP ROCK

TREBLE

* Less More

BASS

* Less More

BALANCE Left

Right

DUAL SOUND • For a stereo broadcast:

MONO STEREO

• For a bilingual broadcast: A for channel 1 B for channel 2

DSP (Digital sound Processor) ON OFF

RESET Resets sound to the factory preset levels.

* Can be only altered if PERSONAL MODE is selected.

Advanced Operation - Advanced TV Operation

Adjusting the Sound

Although the sound is adjusted at the factory, you can modify it to suit your own taste.

Changing Sound Mode Quickly

1 Press the button on the remote control to access directly to the

SOUND MODE .

2 Press the button to select your desired sound mode

(PERSONAL, JAZZ, POP or ROCK ), then press the OK button.

Advanced Operation - Advanced TV Operation

PICTURE CONTROL

CONTRAST BRIGHTNESS COLOUR SHARPNESS HUE RESET

MODE: PERSONAL

PICTURE CONTROL

CONTRAST BRIGHTNESS COLOUR SHARPNESS HUE RESET

MODE: PERSONAL

STEREO ON

SOUND CONTROL

TREBLE BASS BALANCE DUAL SOUND: DSP: RESET

MODE: PERSONAL

STEREO ON

SOUND CONTROL

MODE: PERSONAL

TREBLE

BASS BALANCE DUAL SOUND: DSP: RESET

STEREO ON

SOUND CONTROL

MODE: PERSONAL

TREBLE BASS BALANCE DUAL SOUND: DSP: RESET

SOUND MODE:

PERSONAL

SOUND MODE:

PERSONAL

SOUND MODE:

POP

887

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Advanced Operation - Advanced TV Operation

Using the Sleep Timer

You can select a time period for the TV to switch itself automatically into the standby mode.

1 Press the MENU button on the remote control to display the menu

on the TV screen.

2 Press the button to select the symbol, then press the button

to enter to the TIMER menu.

3 With the cursor highlighting OFF TIMER, press the button.

4 Press the or button to set the time period delay

OFF 0:15 min. 0:30 min. ... ...

4:00 hours

5 Press the OK button.

6 Press the MENU button to exit and return to the normal TV screen.

One minute before the TV switches into standby mode, the time remaining is displayed on the TV screen automatically.

Notes: • When watching the TV, press the

button to display the

time remaining.

• To return to normal operation from standby mode,

press the button.

Advanced Operation - Advanced TV Operation

PICTURE CONTROL

CONTRAST BRIGHTNESS COLOUR SHARPNESS HUE RESET

MODE: PERSONAL

PICTURE CONTROL

CONTRAST BRIGHTNESS COLOUR SHARPNESS HUE RESET

MODE: PERSONAL

TIMER

OFF TIMER:

0:15

OFF

TIMER

OFF TIMER:

OFF

TIMER

OFF TIMER:

887

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Teletext

Viewing Teletext

Using Fastext

Fastext lets you access pages with one button stroke.

When Fastext is broadcast, a colour coded menu appears at the bottom of the teletext page. Press the colour button (red, green, yellow or blue) on the remote control to access the corresponding page.

Index

TELETEXTTELETEXT

Programme News Sport Weather

25 153 101 98

Index

TELETEXTTELETEXT

Programme News Sport Weather

25 153 101 98

Index

TELETEXTTELETEXT

Programme News Sport Weather

25 153 101 98

Index

TELETEXTTELETEXT

Programme News Sport Weather

25 153 101 98

Selecting Teletext

1 Select the TV channel which carries the teletext service you wish to

view.

2 Press the button on the remote control to switch on the teletext.

3 Input three digits for the page number, using the numbered buttons

on the remote control. (if you have made a mistake, type in any three digits and then, re-enter the correct page number).

4 Press the button to switch off teletext.

Using other Teletext functions

TO PRESS THE BUTTON

Access the next or preceding page

for next page or

for the preceding page

Superimpose teletext on to the TV

Press again to cancel teletext mode.

Freeze a teletext page

Press again to cancel the freeze.

Reveal concealed information

(e.g: answer to a quiz) Press again to cancel.

Teletext is an information service transmitted by most TV stations.

Make sure to use a TV channel with a strong signal, otherwise teletext errors may occur.

887

PROGR

1 4 7

2 5 8 0

3 6 9

L/G/S/I

R/D/D/D

2 /

Front of TV

8mm/Hi8 camcorder

VCR

“PlayStation”

Hi-Fi

Rear of TV

S-VHS/Hi8 camcorder

Decoder

Optional Connections

You can connect optional audio or video equipment to your TV, such as a VCR, a camcorder or a video game as shown below.

Using Optional Equipment

MONO

L/G/S/I R/D/D/D

Optional Connections

Select and View the Input Signal

Connect your equipment to the designated TV socket.

2 Press

the

button repeatedly on your remote control until the correct

input symbol appears on the TV screen.

Symbol Input signals

k • Audio/video input signal through the Euro AV

connector

• RGB input signal through the Euro AV

connector

• Audio/video input signal through the Euro AV

connector

• S video input signal through the Euro AV

connector

• Video input signal through the phono socket

and

Audio input signal through

• S video input signal through the socket

and

Audio input signal through D.

3 Switch on the connected equipment.

4 To return to normal TV picture, press the button on the remote control.

Note: To avoid picture distortion, do not connect equipment to the B and

connectors

at the same time.

Additional Information

Connecting a VCR

Plug in VCR to the socket

on the rear of the TV set. We recommend you tune in the VCR signal to TV programme number ‘0’ using the section “Manually Tuning the TV“ of this instruction manual.

Connecting Headphones

Plug in your headphones to the socket

on the front of the TV set.

Connecting Decoders

Plug in decoders to the socket

on the rear of the TV.

Connecting to External Audio Equipment

Plug in your Hi-Fi equipment to the

sockets on the rear of the TV if you wish

to amplify the audio output from the TV.

* “PlayStation” is a product of Sony Computer Entertainment, Inc. * “PlayStation” is a trademark of Sony Computer Entertainment, Inc.

Additional Information

Troubleshooting

Here are some simple solutions to the problems which may affect the picture and sound.

Problem Solution

No picture (screen is dark), no sound • Plug the TV in.

• Press the

button on the front of TV.

• If the

indicator is on, press button or a

programme number button on the remote control.

• Check the aerial connection.

• Check that the selected video source is on.

• Turn the TV off for 3 or 4 seconds and then turn it on again using the

button on the front of the TV.

Poor or no picture (screen is dark), • Using the MENU system, select the Picture Adjustment but good sound display.

Adjust the brightness, picture and colour balance levels.

• From the Picture Adjustment display select RESET to return to the factory settings.

Poor picture quality when watching a • Press the button repeatedly on the remote control until RGB video source. the RGB symbol is displayed on the screen.

Good picture, no sound • Press the +/– button on the remote control.

• If

is displayed on the screen, press the button on the

remote control.

No colour on colour programmes • Using the MENU system, select the Picture Adjustment

display. Adjust the colour balance.

• From the Picture Adjustment display select RESET to return to the factory settings.

Distorted picture when changing • Turn off any equipment connected to the 21 pin Euro programmes or selecting teletext connector on the rear of the TV.

Noisy picture when viewing TV • Adjust Fine Tuning to obtain better picture reception. channel

Remote control does not function • Replace the batteries.

The standby indicator on the TV • Contact to your nearest Sony service centre. flashes.

• If you continue to have these problems, have your TV serviced by qualified personnel.

• NEVER open the casing yourself.

Additional Information

Specifications

TV system

Colour system

PAL NTSC 3.58, 4.43 (only Video In)

Channel coverage

UHF: B21-B69

Picture tube

Flat Display Trinitron Approx. 72 cm (29 inches) (Approx. 68 cm picture measured diagonally), 104° deflection

Rear Terminals

:1/

21-pin Euro connector (CENELEC standard) including audio/video input, RGB input, TV audio/video output

:2/

21-pin Euro connector (CENELEC standard) including audio/video input, S-video input, monitor audio/video output

Audio outputs - phono jacks

Front Terminals

video input - phono jack

audio inputs - phono jacks

S video input - 4 pin DIN Headphones jack - minijack stereo

Sound output

2x7 W + 1x15 W (RMS)

Power consumption

150 W

Standby Power consumption

0.5 W

Dimensions (w x h x d)

Approx. 746 x 569 x 516 mm

Weight

Approx. 47.5 kg

Accessories supplied

1 Remote Control (RM-887) 2 Batteries (IEC designated)

Other features

TELETEXT, Fastext, TOPtext NICAM Stereo Sleep Timer Smartlink

Design and specifications are subject to change without notice.

3 3

2-1. REAR COVER REMOVAL

SECTION 2

DISASSEMBLY

3 Rear Cover

2 6 Screws BTV 4x16

2-2. CHASSIS ASSY REMOVAL

1 1 Screw BTV 4x16

2-3. SERVICE POSITION

>20mm

EHT Lead

2-4. H BOARD REMOVAL 2-5. S1 BOARD REMOVAL

Release the clip indicated

To release, push the claws in the direction of the arrow as indicated.

Anode button

* REMOVING PROCEDURES.

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

2-6. PICTURE TUBE REMOVAL

Two DGC holders 7

Degaussing coils 8

Spring Extension 9

C Board

Neck assy 5

Deflection yoke

Anode cap 1

2 Chassis assy

VM Board

10 Four PT screws (M)

11 Picture tube

Cushion

• REMOVAL OF ANODE-CAP

Note : Short circuit the anode of t he picture tube and the anode cap to the metal chassis, CRT shield or carbon paint on th e CRT, after removing the anode.

• HOW TO HANDLE THE ANODE-CAP

1 To prevent damaging the surface of the a node -cap do not use sharp materials. 2 Do not apply too great a pressure on the rubber, as this may cause damage to the

anode connector.

3 A metal fitting ca lled a shatter hook terminal is fitted inside the rub ber cap.

Do not turn the rubber foot over excessively this may cause damage if the shatter hook sticks out.

Tab

Catch

CatchCatch

Catch

Tab

Refitting

Gate

GateGate

Gate Gate

REMOVAL AND REPLACEMENT OF THE MAIN-BRACKET BOTTOM PLATES.

For safety reasons, on no account should the plates be

removed and not refitted after servicing.

(1) REMOVING THE PLATES

In the event of servicing being required to the solder side of the A Board printed wiring board, the bottom plates fitted to the main chassis bracket r equ ire to be removed. This is performed by cutting the gates with a sharp wire cutter at the locations shown and indicated by arrows.

Note :There are 2 plates fitted to the main bracket and secured by 4 gates.

Only remove the necessary plate to gain access to the printed wiring board.

(2) REFITTING THE PLATES

Because the plates differ in size it is important th at the corr ect pla tes are ref it ted in their original location.

Please note that the plates need to be rotated 180 degrees from the cut position to allow the tabs to be fitted in the catch positions.

SECTION 3

Purity control corrects this area

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

Deflection yoke positioning corrects these areas

GREEN

BLUE

RED

Purity control



Neck Assy

A buckle

Deflection yolk

SET-UP ADJUSTMENTS

• When complete readjustment is necessary or a new picture tube is installed, carry out the following adjustments.

• Unless there are specific instructions to the contrary, carry out these adjustments with the rated power supply.

• Unless there are specific instructions to the contrary, set the controls and switches to the following settings :

Contrast ............... 80% [or remote control normal]

Brightness ............... 50%

Preparation:

1. In order to reduce the influence of geomagnetism on the set’s picture tube, face it in an easterly or westerly direction.

2. Switch on the set’s power and degauss with the degausser.

3-1. BEAM LANDING

1. Input an all white signal from the pattern generator. Set the Contrast and Brightness to normal.

2. Set the pattern generator r as ter signal to Red.

3. Move the deflection yoke forward and adjust with the purity control so that the Red is at the centre and the Blue and Green take up equally sized areas on each side of the screen. [See Fig.3-1 - 3-3].

4. Move the deflection yoke forw ard and adjust so that the entire screen becomes Red. [See Fig.3 -1]

5. Switch the raster signal to Blue, then to Green and verify the condition.

6. When the pos ition of the deflection yoke has been determ ined, fasten the deflection yoke with the screws.

7. If the beam does not land cor r ectly in all the corners, use a magnet to correct it. [See Fig.3-4]

Carry out the following adjustments in this order : 3-1. Beam Landing 3-2. Convergence 3-3. Focus 3-4. White Balance

Note : Test equipment required

1. Color bar/pattern generator.

2. Degausser.

3. Oscilloscope.

4. Digital multimeter.

5. DC Power supply.

Fig. 3-2

Fig. 3-3

Fig. 3-1

Fig. 3-4

R G B

Center dot

RG B

H.STAT

V. STAT Magnet

RV702

RV701

SCREEN

H. STAT

3-2. CONVERGENCE

Preparation:

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

• Minimize the Brightness setting.

• Input a dot pattern from the pattern generator.

(1) Horizontal and vertical static convergence

• Tilt the V.STAT magnet and adjust the static convergence by opening or clo s ing the V.STAT m a gnet.

4. If the V.STAT magnet is moved in the direction of the a and b arrows, the Red, Green and Blue points move as indicated below.

1. [Moving horizontally], adjust the H.STAT control so that the Red, Green and Blue points are o n t op of each other at the centre of the screen.

2. [Moving vertically], adjust the V.STAT magnet so that the Red, Green and Blue points are o n t op of each other at the centre of the screen.

3. If the H.STAT variable resistor is unable to bring the Red, Green and Blue points together at the centre of the screen, adjust the horizontal convergence with the H.STAT variable resistor and the V.STAT magnet in the manner indicated belo w. [In this case, the H.STAT variable resistor and the V.STAT magnet influence each other].

BMC (Hexapole)

V.STAT

Purity

RG B R G B R G B

RGBR

Tilt Direction

• Operation of the BMC (Hexapole) magnet.

• The respective dot position resulting from moving each magnet interact, so be sure to perform adjustment whilst tracking. Use the H.STAT VR to adjust the Red, Green and Blue dots so that they coincide at the centre of the screen (by moving the dots in the horizontal direction).

(2) Dynamic convergence adjustment.

Preparation:

• Before starting this adjustment, adjust the horizontal and vertical static convergence.

1. Remove the deflection yoke spacer.

2. Tilt the deflection yoke as indicated in the figure below and optimize the convergence.

3. Re-install the deflection yoke spacer.

Note : This adjustment will affect the geometry of the

display, therefore adjust to obtain the optimum setting.

+ 39 hidden pages

SONY KV-25FX20A, KV-25FX20B, KV-25FX20D, KV-25FX20E, KV-25FX20K Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual