Sony kv 27s42 schematic

SERVICE MANUAL

MODEL COMMANDER DEST CHASSIS NO.

BA-4D

CHASSIS

KV-27S42 KV-27S42 KV-27S46 KV-27S66 KV-27S66 KV-29AL42 KV-29AL42C KV-29AL66 KV-29AL66C KV-29SL42 KV-29SL42C KV-29SL46 KV-29XL42M

RM-Y165 US SCC-S27H-A RM-Y165 CND SCC-S28F-A RM-Y167 US SCC-S27K-A RM-Y167 US SCC-S27L-A RM-Y167 CND SCC-S28G-A RM-Y165 E SCC-S25U-A RM-Y165 E SCC-S25Y-A RM-Y167 E SCC-S25T-A RM-Y167 E SCC-S25V-A RM-Y165 E SCC-S25W-A RM-Y165 E SCC-S25S-A RM-Y167 E SCC-S25X-A RM-Y165 MX SCC-S26C-A

MICROFILM

RM-Y167KV-29AL66

TRINITRON® COLOR TV

KV-27S42/27S46/27S66/29AL42/29AL42C/29AL66/ 29AL66C/29SL42/29SL42C/29SL46/29XL42M

KV-27S42 KV-27S66 KV-29AL42C KV-29AL66 KV-29SL42

Power Requirements 120V,60Hz 120V,60Hz 50/60Hz 50/60Hz 50/60Hz Number of input/outputs

Video S Video Audio

Audio Out

12 231, 2(KV-29SL46) 11 111 12 231, 2(KV-29SL46) 11 111

Monitor Out -- -1- Speaker Output(W) 5WX2 5WX2 10WX2 10WX2 5WX2

Power Consumption(W) 150W (KV-27S66)

In Use (Max) 140W 140W (KV-27S46) 170W 180W 140W In Standby 2W 2W 3W 3W 3W

Dimensions(W/H/D)

(mm) 660.4X598 660.4X598 767.4X579.7 767.4X579.7 660.4X598

X505.5mm X505.5mm X547.7mm X547.7mm X505.5mm

(in.) 26x23

9/16

x20in 26x23

SPECIFICATIONS

KV-29SL46

KV-27S46 KV-29AL42 KV-29AL66C KV-29XL42M

KV-29SL42C

120-220V 120-220V 120-220V

9/16

x20in 30

1/4

7/8

X22

x21

5/8

in 30

1/4

7/8

X22

x21

5/8

in 26x23

9/16

x20in

Mass (Kg) 39kg 39kg 42kg 42kg 39kg

(lbs) 86lbs 86lbs 93lbs 93lbs 86lbs

T elevision system

American TV standard/NTSC

Channel coverage

1 Vp-p 75 ohms unbalanced, sync negative

Y: 1 Vp-p 75 ohms unbalanced, sync negative C: 0.286 Vp-p (Burst signal), 75 ohms

500 mVrms (100% modulation), Impedance: 47 kilohms

More than 408 mVrms at the maximum volume setting (variable) More than 408 mVrms (fix); Impedance: 5 kilohms

VHF:2-13 / UHF:14-69 / CATV:1-125

Picture tube

Trinitron® tube

Visible screen size

27-inch picture measured diagonally 29-inch picture measured diagonally

Antenna

75 ohm external antenna terminal for VHF/UHF

Supplied accessories

Remote Commander with 2 size AA (R6) batteries RM-Y167 (KV-29AL66/29AL66C/29SL46/27S46/27S66) RM-Y165 (KV-29AL42/29AL42C/27S42/29XL42M/29SL42/29SL42C)

( ) SRS (SOUND RETRIEVAL SYSTEM)

Optional accessories

Connecting Cables: VMC-810S/820S, VMC-720M.

YC-15V/20V , RK-74A

The ( ) SRS (SOUND RETRIEVAL SYSTEM) is manufactured by Sony Corporation under license from SRS Labs, Inc. It is covered by U.S. Patent No. 4,748,669. Other U.S. and foreign patents pending.

TV Stand: SU-27A4 U/V Mixer: EAC-66

Design and specifications are subject to change without notice.

— 2 —

The word ‘SRS’ and the SRS symbol ( ) are registered trademarks of SRS Labs, Inc.

BBE and BBE symbol are trademarks of BBE Sound, Inc. and are licensed by BBE Sound, Inc. under U.S. Patent No. 4,638,258 and 4,482,866.

KV-27S42/27S46/27S66/29AL42/29AL42C/29AL66/

29AL66C/29SL42/29SL42C/29SL46/29XL42M

TABLE OF CONTENTS

Section Title Page

Warnings and Cautions ..................................................................................................................................... 4

Self-Diagnostic Function ................................................................................................................................... 4

Safety Check-Out Instructions ........................................................................................................................... 7

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

2. DISASSEMBLY

2-1. Rear Cover Removal 2-2. Rear Cover Removal 2-3. Rear Cover Removal 2-4. Control Switch Removal

2-5. Chassis Assembly Removal (KV-27S46/27S66/29SL42/29C/29SL46/29XL42M) ............................................. 12

2-6. Chassis Assembly Removal

2-7. Service Position ..................................................................................................................................... 12

2-8. Picture Tube Removal ........................................................................................................................... 13

3. SET-UP ADJUSTMENTS

3-1. Beam Landing ....................................................................................................................................... 1 4

3-2. Convergence .......................................................................................................................................... 1 5

3-3. Focus ..................................................................................................................................................... 1 6

3-4. Screen (G2)............................................................................................................................................ 16

3-5. Method of Setting the Service Adjustment Mode ...................................................................................16

3-6. White Balance Adjustments .................................................................................................................. 1 6

(KV-27S46/27S66) .............................................................................................................. 11

(KV-29SL42/29C/29SL46/29XL42M) .................................................................................. 11

(KV-29AL42/42C/29AL66/66C) .......................................................................................... 11

(KV-29AL42/42C/29AL66/66C) .................................................................................... 11

(KV-29AL42/42C/29Al66/66C) .............................................................................. 12

4. SAFETY RELATED ADJUSTMENTS

4-1.

R582 and R584 Confirmation Method (HV Hold-Down Confirmation and Readjustments) .......... 17

4-2. B+ Voltage Confirmation and Adjustment ............................................................................................. 17

5. CIRCUIT ADJUSTMENTS

5-1. Setting the Service Adjustment Mode.................................................................................................... 19

5-2. Memory Write Confirmation Method ..................................................................................................... 19

5-3. Adjust Buttons and Indicators ............................................................................................................... 19

5-4. A Board Adjustments ............................................................................................................................. 2 1

6. DIAGRAMS

6-1. Block Diagram ....................................................................................................................................... 2 3

6-2. Circuit Board Location ........................................................................................................................... 2 6

6-3. Printed Wiring Boards and Schematic Diagrams ................................................................................. 2 6

• A Board .............................................................................................................................................. 27

• P Board .............................................................................................................................................. 3 5

• K Board .............................................................................................................................................. 3 7

• HT Board............................................................................................................................................ 3 7

• C Board .............................................................................................................................................. 39

• CV Board............................................................................................................................................ 40

• E Board .............................................................................................................................................. 4 2

• HV Board............................................................................................................................................ 43

6-4. Semiconductors .................................................................................................................................... 45

7. EXPLODED VIEW

7-1. Chassis (KV-27S66) .............................................................................................................................. 4 6

7-2. Chassis (KV-27S42/27S46/27SL42/42C/29SL46/29XL42M) .............................................................. 4 7

7-3. Chassis (KV-29AL42/29AL42C) ............................................................................................................ 4 8

7-4. Chassis (KV-29AL66/66C) .................................................................................................................... 49

8. ELECTRICAL P ARTS LIST

...................................................................................................................................................50

— 3 —

KV-27S42/27S46/27S66/29AL42/29AL42C/29AL66/ 29AL66C/29SL42/29SL42C/29SL46/29XL42M

WARNINGS AND CAUTIONS

CAUTION

SHORT CIRCUIT THE ANODE OF THE PICTURE TUBE AND THE ANODE CAP TO THE MET AL CHASSIS, CRT SHIELD, OR CARBON PAINTED ON THE CR T , AFTER REMOVING THE ANODE.

WARNING!!

AN ISOLATION TRANSFORMER SHOULD BE USED DURING ANY SERVICE TO A VOID POSSIBLE SHOCK HAZARD, BECAUSE OF LIVE CHASSIS. THE CHASSIS OF THIS RECEIVER IS DIRECTLY CONNECTED TO THE AC POWER LINE.

SAFETY-RELATED COMPONENT W ARNING!!

COMPONENTS IDENTIFIED BY SHADING AND MARK ON THE SCHEMATIC DIAGRAMS, EXPLODED VIEWS, AND IN THE PARTS LIST ARE CRITICAL FOR SAFE OPERA TION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY. CIRCUIT ADJUSTMENTS THAT ARE CRITICAL FOR SAFE OPERATION ARE IDENTIFIED IN THIS MANUAL. FOLLOW THESE PROCEDURES WHENEVER CRITICAL COMPONENTS ARE REPLACED OR IMPROPER OPERA TION IS SUSPECTED. A TTENTION

ATTENTION !!

APRES AVOIR DECONNECTE LE CAP DE L'ANODE, COURT-CIRCUITER L'ANODE DU TUBE CATHODIQUE ET CELUI DE L'ANODE DU CAP AU CHASSIS METALLIQUE DE L'APP AREIL, OU AU COUCHE DE CARBONE PEINTE SUR LE TUBE CA THODIQUE OU AU BLINDAGE DU TUBE CATHODIQUE.

ATTENTION !!

AFIN D'EVITER TOUT RESQUE D'ELECTROCUTION PROVENANT D'UN CHÁSSIS SOUS TENSION, UN TRANSFORMATEUR D'ISOLEMENT DOIT ETRE UTILISÉ LORS DE TOUT DÉPANNAGE. LE CHÁSSIS DE CE RÉCEPTEUR EST DIRECTEMENT RACCORDÉ À L'ALIMENTA TION SECTEUR.

A TTENTION AUX COMPOSANTS RELATIFS A LA SECURITE!!

LES COMPOSANTS IDENTIFIES P AR UNE TRAME ET P AR UNE MARQUE

SUR LES SCHEMAS DE PRINCIPE, LES VUES EXPLOSEES ET LES LISTES DE PIECES SONT D'UNEIMPORTANCE CRITIQUE POUR LA SECURITE DU FONCTIONNEMENT . NE LES REMPLACER QUE PAR DES COMPOSANTS SONY DONT LE NUMERO DE PIECE EST INDIQUE DANS LE PRESENT MANUEL OU DANS DES SUPPLEMENTS PUBLIES P AR SONY . LES REGLAGES DE CIRCUIT DONT L'IMPORTANCE EST CRITIQUE POUR LA SECURITE DU FONCTIONNEMENT SONT IDENTIFIES DANS LE PRESENT MANUEL. SUIVRE CES PROCEDURES LORS DE CHAQUE REMPLACEMENT DE COMPOSANTS CRITIQUES, OU LORSQU'UN MAUVAIS FONTIONNEMENT SUSPECTE.

SELF-DIAGNOSTIC FUNCTION

The units in this manual contain a self-diagnostic function. If an error occurs, the STANDBY/TIMER LED will automatically begin to flash. The number of times the LED flashes translates to a probable source of the problem. A definition of the STANDBY/TIMER LED 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 .

Diagnostic T est Indicators

When an error occurs, the STANDBY/TIMER LED will flash a set number of times to indicate the possible cause of the problem. If there is more than one error, the LED will identify the first of the problem areas. Results for all of the following diagnostic items are displayed on screen. No error has occurred if the screen displays a “0”.

Diagnostic Item No. of times Display/ Probable Cause Detected

Description STANDBY/TIMER Diagnostic result Location Symptoms

* Power does not turn on Does not light * Power cord is not plugged in. * Power does not come on.

* +B overcurrent (OCP) 2 times 2:0 or 2:1 * H.OUT (Q502) is shorted. (A board) * Power does not come on.

* Vertical deflection 4 times 4:0 or 4:1 * +13V is not supplied. (A board) * Has entered standby state after stopped* horizontal raster.

lamp flashes

* Fuse is burned out (F5050) (E Board) * No power is suppled to the TV.

* AC power supply is faulty.

* IC1751 is shorted. (C board) * Load on power line is shorted.

* IC1701 is shorted. (CV board)

* IC 541 is faulty (A board) * Vertical deflection pulse is stopped.

* Power line is shorted or power supply is stopped.

* White balance failure 5 times 5:0 or 5:1 * Video OUT (Q306 to 308) is faulty.(A bd) * No raster is generated. (not balanced) * IC301 is faulty. (A board) * CRT cathode current detection

* If a +B overcurrent is detected, stoppage of the vertical deflection is detected simulatneously. The symptom that is diagnosed first by the microcontroller is displayed on the screen.

** Refer to Screen (G2) Adjustment in Section 3-4 of this manual.

* G2 is improperly adjusted**. reference pulse output is small.

— 4 —

KV-27S42/27S46/27S66/29AL42/29AL42C/29AL66/

STANDBY/TIMER LED

29AL66C/29SL42/29SL42C/29SL46/29XL42M

Display of Standby/Timer LED Flash Count

2 times 4 times 5 times

LED ON 0.3 sec. LED OFF 0.3 sec.

Diagnostic Item Flash Count*

+B overcurrent 2 times Vertical deflection stopped 4 times White balance failure 5 times

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

LED OFF

3 sec.

Stopping the Standby/Timer LED 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.

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 occurrences of failure on the screen for confirmation.

T o Bring Up Screen Test

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

Display Channel

Sound volume

Power ON

Note that this differs from entering the service mode (sound volume

Self Diagnostic Screen Display

SELF DIAGNOSTIC

2: 3: 4: 5: 101:

N/A

0 0 0 1 0

Numeral “0” means that no fault was detected.

Numeral “1” means a fault was detected one time only.

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 when the diagnostic screen is displayed, as shown below:

Quitting the Self-Diagnostic Screen

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

ENTERChannel

— 5 —

KV-27S42/27S46/27S66/29AL42/29AL42C/29AL66/ 29AL66C/29SL42/29SL42C/29SL46/29XL42M

Self-diagnostic Circuit

FROM

CRT

FROM

IC521 PIN 7

IC301

Y/CHROMA JUNGLE

IK IN

HP/PROTECT

SDA

IC541

V. OUT

REF

IC001

SYSTEM

IO-BDAT

O-LED

I-PROT

IO-SDAT

DISPLAY

IC003

MEMORY

B-DAT

+B overcurrent (OCP) Occurs when an overcurrent on the +B (115V) line is detected by pin 18 of IC301. If the voltage

of pin 18 of IC 301 is less than 1V 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 of IC001. Power

supply will shut down when waveform interval exceeds 2 seconds.

White balance failure If the RGB levels* do not balance within 2 seconds after the power is turned on, 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 1K.)

— 6 —

SAFETY CHECK-OUT

KV-27S42/27S46/27S66/29AL42/29AL42C/29AL66/

29AL66C/29SL42/29SL42C/29SL46/29XL42M

After correcting the original service problem, perform the following safety checks before releasing the set to the customer:

1. Check the area of your repair for unsoldered or poorly soldered connections. Check the entire board surface for solder splashes and bridges.

2. Check the interboard wiring to ensure that no wires are “pinched” or touching high-wattage resistors.

3. Check that all control knobs, shields, covers, ground straps, and mounting hardware have been replaced. Be absolutely certain that you have replaced all the insulators.

4. Look for unauthorized replacement parts, particularly transistors, that were installed during a previous repair. Point them out to the customer and recommend their replacement.

5. Look for parts which, though functioning, show obvious signs of deterioration. Point them out to the customer and recommend their replacement.

6. Check the line cords for cracks and abrasion. Recommend the replacement of any such line cord to the customer.

7. Check the B+ and HV to see if they are specified values. Make sure your instruments are accurate; be suspicious of your HV meter if sets always have low HV.

8. Check the antenna terminals, metal trim, “metallized” knobs, screws, and all other exposed metal parts for AC leakage. Check leakage as described below.

Leakage Test

The AC leakage from any exposed metal part to earth ground and from all exposed metal parts to any exposed metal part having a return to chassis, must not exceed

0.5 mA (500 microampere). Leakage current can be measured by any one of three methods.

1. A commercial leakage tester, such as the Simpson 229 or RCA WT-540A. Follow the manufacturers' instructions to use these instructions.

2. A battery-operated AC milliammeter. The Data Precision 245 digital multimeter is suitable for this job.

3. Measuring the voltage drop across a resistor by means of a VOM or battery-operated AC voltmeter. The “limit” indication is 0.75 V, so analog meters must have an accurate low voltage scale. The Simpson’s 250 and Sanwa SH-63Trd are examples of passive VOMs that are suitable. Nearly all batteryoperated digital multimeters that have a 2 VAC range are suitable (see Figure A).

How to Find a Good Earth Ground

A cold-water pipe is guaranteed earth ground; the coverplate retaining screw on most AC outlet boxes is also at earth ground. If the retaining screw is to be used as your earth ground, verify that it is at ground by measuring the resistance between it and a cold-water pipe with an ohmmeter. The reading should be zero ohms. If a coldwater pipe is not accessible, connect a 60- to 100-watt trouble light (not a neon lamp) between the hot side of the receptacle and the retaining screw. Try both slots, if necessary, to locate the hot side on the line; the lamp should light at normal brilliance if the screw is at ground potential (see Figure B).

— 7 —

Figure B. Checking for earth ground.Figure A. Using an AC voltmeter to check AC leakage.

KV-27S42/27S46/27S66/29AL42/29AL42C/29AL66/ 29AL66C/29SL42/29SL42C/29SL46/29XL42M

SECTION 1

GENERAL

The following are partial abstracts from the Operating Instruction Manual. The page numbers shown reflect those of the Operating Instruction Manual.

Connecting Your TV

This section covers basic connections in addition to any optional equipment you may be connecting.

Basic Connections

TV with indoor or outdoor antenna, or CATV cable

Depending on the cable available in your home, choose one of the connections below:

✍ If you are connecting to an indoor or outdoor antenna, it will be necessary to

adjust the orientat ion of the antenna for best reception.

Cable and antenna

KV-27S66, 27V66 only

If your cable provider does not feature local channels, you may find this set up convenient.

CATV cable

(No connection “TO CONVERTER” in this case)

Antenna cable

✍ Select CABLE or ANT mode by pressing on the remote control.

(Rear of TV)

AUX

TO CONVERTER

VHF/UHF

User Guide

Connecting Additional Equipment

TV and VCR

From Cable/ antenna

VCR must be connected and turned on to operate PIP. (KV-27S46 only)

Connect the coaxial cable from your TV antenna or cable TV to the IN jack on your VCR.

Connect a coaxial cable (not supplied) from the OUT jack on your VCR to the VHF/UHF IN jack on the TV.

✍

To watch video programs from your VCR, tune your TV to channel 3 or 4 (as set on the rear of your VCR).

(Optional connection)

If your VCR is equipped with video inputs, for better picture quality you should connect A/V cables to AUDIO and VIDEO OUT on your VCR to AUDIO/VIDEO IN on your TV. You can use the button to switch between the TV and VCR inputs.

✍

For optimum picture quality, use S VIDEO instead of the yellow A/V cable. S VIDEO does not provide sound, the audio cables must still be connected.

VCR

(Optional connection)

Connecting Your TV

TV and Cable Box

Connect the coaxial cable from the wall to the IN jack on your cable box.

Connect a coaxial cable (not supplied) from the OUT jack on your cable box to the VHF/UHF IN jack on the TV.

✍

To view channels from your cable box, tune your TV to channel 3 or 4 (as set on the rear panel of your cable box).

✍

If you will be controlling all channel selection through your cable box, you should consider using the CHANNEL FIX feature on page24.

3 4

User Guide

TV, Cable box and Cable

KV-27S 66 , 27V66 only

For this set up, you can switch between scrambled channels (through your cable box), and normal (CATV) channels by pressing on your remote control.

✍

When using PIP, the AUX input cannot be viewed in the window picture.

(Rear panel KV-27V66 only)

5 6

— 8 —

KV-27S42/27S46/27S66/29AL42/29AL42C/29AL66/

29AL66C/29SL42/29SL42C/29SL46/29XL42M

Connecting Your TV

TV, VCR, and Cable box

VCR

Cable box

Cable

1 Connect the coaxial cable from the wall to the IN jack on your cable

box.

2 Connect a coaxial cable (not supplied) from the OUT jack on your

cable box to the IN jack on your VCR.

3 Connect a coaxial cable (not supplied) from the OUT jack on your

VCR to the VHF/UHF IN jack on the TV.

✍ If you will be controlling all channel selection through your cable box, you

should consider using the CHANNEL FIX feature on page24.

(Optional connection)

4 If your VCR is equipped with video inputs, for better picture quality

you should connect A/V cables to AUDIO and VIDEO OUT on your VCR to AUDIO/VIDEO IN on your TV. You can use the button to switch between the TV and VCR inputs.

✍ For optimum picture quality, use S VIDEO instead of the yellow A/V cable.

S VIDEO does not provide sound, the audio cables must still be connected.

(Optional connection)

User Guide

TV and Digital Satellite Receiver

From cable/ antenna

Satellite receiver

Satellite

antenna

cable

1 Connect the cable from your satellite antenna to SATELLITE IN on

the satellite receiver.

2 Attach the coaxial connector from your cable or antenna to

VHF/UHF IN on your TV.

3 Using A/V connectors, connect AUDIO and VIDEO OUT on your

satellite receiver to AUDIO and VIDEO IN on your TV. You can use the button to switch between the satellite receiver and the TV.

✍ For optimum picture quality, use S VIDEO instead of the yellow A/V cable.

S VIDEO does not provide sound, your audio connectors must still be connected.

Connecting Your TV

TV, Digital Satellite Receiver and VCR

Satellite antenna

VCR

Satellite receiver

1 Connect the cable from your satellite antenna to SATELLITE IN on

the satellite receiver.

2 Attach the coaxial connector from your cable or antenna to

VHF/UHF IN on your VCR.

3 Using a coaxial cable, connect VHF/UHF OUT on your VCR to

VHF/UHF IN on your TV.

4 Using A/V connectors, connect AUDIO and VIDEO OUT on your

satellite receiver to AUDIO and VIDEO IN on your VCR.

5 Using A/V connectors, connect AUDIO and VIDEO OUT on your

VCR to AUDIO and VIDEO IN on your TV.

✍ To view from the satellite or VCR, select the video input to which your

satellite receiver or VCR is connected by pressing on the remote control.

Cable

User Guide

Connecting a Camcorder

Using A/V cables, connect AUDIO and VIDEO OUT on your camcorder

to AUDIO and VIDEO IN on your TV.

A/V output

(Front A/V Panel KV-27V42, 27V66 only)

✍ Connection can also be made to the rear A/V panel of your TV.

Connecting a DVD Player

Using A/V connectors, connect LINE OUT on your DVD to VIDEO IN on your TV.

(Rear of DVD player)

A/V outputs

(Rear of TV)

✍ For optimum picture quality, use S VIDEO instead of the yellow A/V cable.

S VIDEO does not provide sound, your audio connectors must still be connected.

— 9 —

KV-27S42/27S46/27S66/29AL42/29AL42C/29AL66/ 29AL66C/29SL42/29SL42C/29SL46/29XL42M

Connecting Your TV

Connecting an audio system

Using audio connectors, connect AUDIO OUT on your TV to one of the unused line inputs (e.g. TV, AUX, TAPE 2) on your stereo.

AUDIO-L

AUDIO-R

Line input

✍ Set your stereo to the chosen line input. (See page 20 for additional audio

setup instructions.)

User Guide

Connecting two VCRs for Tape Editing

KV-27V42, 27V66 only

MONITOR OUT gives you the ability to use a second VCR to record a program being played by the primary VCR to perform tape editing.

(Rear panel KV-27V66 only)

VCR (for playback)

1 Connect the VCR intended for playback using the setup instructions

on page 4 of this manual.

2 Using A/V connectors, connect AUDIO and VIDEO IN on your VCR

intended for recording to MONITOR AUDIO and VIDEO OUT on your TV.

✍ To perform tape editing; set the TV to the video input intended for playback

by pressing

on the remote control.

VCR (for recording)

User Guide

Troubleshooting

If you are having a problem with your TV, try the suggestions below. If the problem persists, contact your nearest Sony dealer.

Cannot operate single tuner PIP (KV-27S46)

No picture, no sound

Poor or no picture, good sound

Good picture, no sound

No color ❏ Adjust COLOR in the VIDEO menu (page 19). Only snow

appears on the screen

❏ Make sur e the VCR is connect ed correctly (see page 4). ❏ Check to see if t he VCR is on. ❏ Make sure your remote control is programmed to

operate your VCR (see page 31).

❏ Make sure the power cord is plugged in. ❏ If a red light is flashing on the front of your TV for

more than a few minutes, call your local service center.

❏ Check the TV/VIDEO set tings: whe n watching TV, set

to TV; when watching video equipment, set t o VIDEO (page 19).

❏ Make sure the batteries have been inserted correctly

into the remote control.

❏ Check your PARENTAL CONTROL settings (pages

28-29).

❏ Try another channel, it could be station trouble. ❏ Adjust PICTURE in the VIDEO menu (page 19). ❏ Adjust BRIGHTNESS in the VIDEO menu (page 19). ❏ Check the antenna and/or cable connections (page 3). ❏ Press so that MUTING disappears from the

screen (page 13).

❏ Check your AUDIO settings. Your TV may be set to

SAP (page 21).

❏ Check the CABLE setting in the CHANNEL SET UP

menu (page 24).

❏ Check the antenna and/or cable connections (page 3). ❏ Make sure the channel selected is currently

broadcasting.

❏ Press the button on the remote control.

Other Information

Dotted lines or stripes

Double images or ghosts

Cannot receive higher number channels (UHF) when using an antenna

Cable stations

don’t seem to work

Remote Control does not operate

The TV needs to be cleaned

Lost password for PARENTAL CONTROL

If, after reading these operating instructions, you have additional questions related to the use of your Sony television, please call our Direct Response Center at 1-800-222-SONY (7669) (U.S. residents only) or (416) 499-SONY (7669) (Canadian residents only).

❏ Adjust the antenna. ❏ Move the TV awa y from other electronic equipment.

Some electronic equipment can create electrical noise, which can interfere with TV reception.

❏ Check your outdoor antenna or call your cable service.

❏ Make sure CABLE is set to OFF in the CHANNEL SET

UP menu (page24).

❏ Use AUTO PROGRAM to add channels that are not

presently in the memory (page24).

❏ Make sure CA BLE is set t o ON in the CHANNEL S ET

UP menu (page24).

❏ Use AUTO PROGRAM to add channels that are not

presently in the memory (page24).

❏ Batteries could be weak. Replace them (page 2). ❏ Move the TV 3-4 feet away from fluorescent lights.

❏ Clean the TV with a soft dry cloth. Never use strong

solvents such as thinner or benzine, which might damage the finish of the cabinet.

❏ In the password screen, enter the following master

password: 4357. After using the master pass word, you must create a new password, it cannot be used to unlock currently blocked channels.

— 10 —

SECTION 2

DISASSEMBLY

KV-27S42/27S46/27S66/29AL42/29AL42C/29AL66/29AL66C/

29SL42/29SL42C/29SL46/29XL42M

2-1. REAR COVER REMOVAL

(KV-27S46/27S66)

2-2. REAR COVER REMOVAL

(KV-29SL42/29SL42C/29SL46/29XL42M)

Rear Cover

Seven screws (BVTP 4X16)

Two screws (BVTP 3X10)

2-3. REAR COVER REMOVAL

(KV-29AL42/29AL42C/29AL66/29AL66C)

Two Screws

(BVTP 3x10)

2-4.CONTROL SWITCH REMOVAL

(KV-29AL42/29AL42C/29AL66/29AL66C)

Rear Cover

Control Switch

Four Claws

Nine Screws (BVTP 3x12)

— 11 —

KV-27S42/27S46/27S66/29AL42/29AL42C/29AL66/ 29AL66C/29SL42/29SL42C/29SL46/29XL42M

2-5. CHASSIS ASSEMBL Y REMOVAL (KV-27S46/27S66/29SL42/29SL42C/29SL46/29XL42M)

Board claw

A Board

E Board

2 clips

(KV-27S42/27S46/27S66 only)

2-6. CHASSIS ASSEMBL Y REMOVAL

(KV-29AL42/29AL42C/29AL66/29AL66C)

Board Claw

HV Board

K Board

E Board

A Board

2-7. SERVICE POSITION

C Board

P Board

2 clips

(KV -27S42/27S46/27S66 only)

E Board

— 12 —

2-8. PICTURE TUBE REMOVAL

KV-27S42/27S46/27S66/29AL42/29AL42C/29AL66/29AL66C/

29SL42/29SL42C/29SL46/29XL42M

WARNING:

BEFORE REMOVING

THE ANODE CAP

High voltage remains in the CRT even after the power is disconnected. To avoid electric shock, discharge CRT before attempting to remove the anode cap. Short between anode and CRT coated earth ground strap.

Coated Earth Ground Strap

T ension Spring

Degaussing Coil

Deflection Y oke

T w o DGC holders (M)

(KV-29AL66/29AL66C/ 29AL42/29AL42C)

Four Screws (T apping scre w 7)

Anode Cap

E board

C / CV board

A board

K board

HV board

(KV-29AL66/29AL66C/ 29AL42/29AL42C)

Picture tube

Cushion

(KV-29AL66/29AL66C/ 27S66/29AL42/ 29AL42C)

ANODE CAP REMOV AL

WARNING: High voltage remains in the CRT even after the power is disconnected. To avoid electrical shock, discharge the CRT before

NOTE: After removing the anode, short circuit the anode of the picture tube and the anode cap to either the metal chassis, CRT shield,

attempting to remove the anode cap. Short between anode and coated earth ground strap of CRT.

or carbon painted on the CRT.

REMOVAL PROCEDURES

Anode Button

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

Use your thumb to pull the rubber

cap firmly in the direction indicated by arrow

When one side of the rubber cap separates from the anode button, the anode cap can be removed by turning the rubber cap and pulling it in the direction of arrow

HOW TO HANDLE AN ANODE CAP

Do not use sharp objects which may cause damage to the surface of the anode cap.

To avoid damaging the anode cap, do not squeeze the rubber covering too hard. A material fitting called a shatter-hook terminal is built into the rubber.

Do not force turn the foot of the rubber cover. This may cause the shatter-hook terminal to protrude and damage the rubber.

— 13 —

KV-27S42/27S46/27S66/29AL42/29AL42C/29AL66/

Blue Red

Green

29AL66C/29SL42/29SL42C/29SL46/29XL42M

SECTION 3

SET-UP ADJUSTMENTS

The following adjustments should be made when a complete realignment is required or when a new picture tube is installed.

These adjustments should be performed with rated power supply voltage unless otherwise noted.

Set the controls as follows unless otherwise noted. VIDEO MODE: ST ANDARD

PICTURE control:................ Normal

BRIGHTNESS control......... Normal

3-1. BEAM LANDING

Before beginning adjustment procedure:

1. Degauss the entire screen.

2. Feed in the white pattern signal.

Adjustment Procedure

1. Input a raster signal with the pattern generator.

2. Loosen the deflection yoke mounting screw and set the purity control to the center as shown below.

Perform the adjustments in order as follows:

1. Beam Landing

2. Convergence

3. Focus

4. Screen (G2)

5. White Balance

Note: Test equipment required:

• Color bar pattern generator

• Degausser

• DC power supply

• Digital multimeter

5. Move the deflection yoke forward and adjust so that the entire screen becomes green.

Purity Control

3. Turn the raster signal of the pattern generator to green.

4. Move the deflection yoke backward and adjust the purity control so that green is in the center and red and blue are at the sides evenly.

6. Switch over the raster signal to red and blue and confirm the condition.

7. When the position of the deflection yoke is determined, tighten it with the deflection yoke mounting screw.

8. If landing at the corner is not right, adjust by using the disk magnets.

Purity control

corrects this area

Disk magnets

or rotatable disk

Deflection yoke positioning

corrects these areas

magnets correct

these areas (a-d)

— 14 —

KV-27S42/27S46/27S66/29AL42/29AL42C/29AL66/

29AL66C/29SL42/29SL42C/29SL46/29XL42M

3-2. CONVERGENCE

Before starting convergence adjustments:

1. Perform FOCUS, V.LIN AND V.SIZE adjustments.

2. Set BRIGHTNESS control to minimum.

3. Feed in dot pattern.

Vertical Static Convergence

1. Adjust V.STAT magnet to converge red, green and blue dots in the center of the screen. (Vertical movement)

Center dot

R G B

V.STAT magnet

Horizontal Static Convergence

If the blue dot does not converge with the red and green dots, perform the following:

1. Move BMC magnet (a) to correct insufficient H. Static convergence.

2. Rotate BMC magnet (b) to correct insufficient V. Static convergence.

3. After adjusting the BMC magnet, repeat Beam Landing Adjustment.

PURITY

V. STAT

BMC MAGNET

BMC magnet

2. Tilt the V.STAT magnet and adjust static convergence to open or close the V.STAT magnet.

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

(1)

(2) a

(3)

B G

BGR

RGB

B G

Dynamic Convergence Adjustment

Before performing this adjustment, perform Horizontal and Vertical Static Convergence Adjustment.

1. Slightly loosen deflection yoke screw.

2. Remove deflection yoke spacers.

3. Move the deflection yoke for best convergence, as shown below:

BGR

RGB

BGR

RGB

B G R

R G B

BGR RGB

4. Tighten the deflection yoke screw.

5. Install the deflection yoke spacers.

— 15 —

KV-27S42/27S46/27S66/29AL42/29AL42C/29AL66/ 29AL66C/29SL42/29SL42C/29SL46/29XL42M

Screen-Corner Convergence

1. Affix a permalloy assembly corresponding to the misconverged areas.

a-d: screen-corner

misconvergence

3-3. FOCUS

1. Adjust FOCUS control for best picture.

FOCUS

(FV)

SCREEN

(G2)

3-5. METHOD OF SETTING THE SERVICE

ADJUSTMENT MODE

Service Mode Procedure

1. Standby mode (power off).

Display Channel

on the Remote Commander (press each button within a second).

Sound volume Power

Service Adjustment Mode In

1. The CRT displays the item being adjusted.

Disp.

Item

(Item)

Data

SERVICE HSIZ 0

2. Press or on the Remote Commander to select the item.

3. Press data.

4. Press

or on the Remote Commander to change the

then to save into the memory.

3-4. SCREEN (G2)

1. Input a dots pattern.

2. Set the PICTURE and BRIGHTNESS controls at minimum and COLOR control at normal.

3. Adjust SBRT, GCUT, BCUT in service mode with an oscilloscope as shown below so that voltages on the red, green, and blue cathodes are 170 VDC.

170 VDC

Ground

4. Observe the screen and adjust SCREEN (G2) VR in FBT to obtain the faintly visible background of dot signal.

Pedestal

Service Adjustment Mode Memory

Turn set off then on to exit service adjustment mode.

SERVICE WRITE

MUTING

ENTER

Green

Red

3-6. WHITE BALANCE ADJUSTMENTS

1. Input an entire white signal with burst.

2. Set to Service Adjustment Mode.

3. Set DCOL to “0”.

4. Set the PICTURE and BRIGHTNESS to minimum.

5. Adjust with SBRT if necessary.

6. Select GCUT and BCUT with

7. Adjust with

and for the best white balance.

8. Set PICTURE and BRIGHTNESS to maximum.

9. Select GDRV and BDRV with

10.Adjust with

and for the best white balance.

11.Reset DCOL to “1”.

12. To w rite into memory, press

and .

then .

— 16 —

KV-27S42/27S46/27S66/29AL42/29AL42C/29AL66/

29AL66C/29SL42/29SL42C/29SL46/29XL42M

SECTION 4

SAFETY RELATED ADJUSTMENTS

4-1. R584 CONFIRMATION METHOD

(HV HOLD-DOWN CONFIRMATION) AND READJUSTMENTS

The following adjustments should always be performed when replacing the following components which are marked with

on the schematic diagram:

DY, C508, C505, C507, C509, C511, C515, C520, C573, C574, C575, D572, D573, D574, IC301, IC521, IC602, L591, L501, R582, R583, R585, R578, R586, R625, R626, T504

Preparation Before Confirmation

1. Using a Variac, apply AC input voltage: 120 ± 2 V AC (or 120-220 ± 2 VAC for KV-29AL42/29AL42C/29AL66/ 29AL66C/29SL42/29SL42C/29SL46/29XL42M only.)

2. Turn the POWER switch ON.

3. Input a white signal and set the PICTURE and BRIGHTNESS controls to maximum.

4. Confirm that the voltage between C574 (+) or TP503 and ground is more than 105 VDC.

Hold-down Readjustment

If the setting indicated in step 2 of Hold-down Operation Confirmation cannot be met, readjustment should be performed by altering the resistance value of R584, components marked with

T504

FBT

ammeter

3.0 mA DC range

ABL

IABL

4-2. B+ VOLTAGE CONFIRMATION AND

ADJUSTMENT

Note: The following adjustments should always be performed when replacing the following components, which are marked with

on the schematic diagram on schematic diagram.

Hold-down Operation Confirmation

1. Connect the current meter between Pin 11 of the FBT (T505) and the PWB land where Pin 11 would normally attach. (See Figure 1 on the next page.)

2. Input a dot signal and set PICTURE and BRIGHTNESS to minimum: IABL = 100 + 100/-95 µA.

3. Confirm the voltage of A Board TP-600 is 135 ± 3 VDC.

4. Connect the digital voltmeter and the DC power supply via diode 1SS119 to C574 (+) and ground. (See Figure 1 on the next page.)

5. Increase the DC power voltage gradually until the picture blanks out.

6. Turn DC power source off immediately.

7. Read the digital voltmeter indication (Standard: less than or equal to 141.3 VDC).

8. Input a white signal and set PICTURE and BRIGHTNESS to maximum.

9. Repeat steps 4 to 7.

IC601, IC602

1. Using a Variac, apply AC input voltage: 130 ± 2 VAC (or 120-220 ± 2 for KV-29AL42/29AL42C/29AL66/ 29AL66C/29SL42/29SL42C/29SL46/29XL42M only.)

2. Input a dot signal.

3. Set the PICTURE and BRIGHTNESS controls to minimum.

4. Set to service adjustment mode.

5. Select PADJ with

6. Adjust with

7. Confirm that the voltage of A Board TP-600 is less than 138 VDC.

8. If step 7 is not satisfied, replace the components listed above, then repeat the above steps.

9. Adjust with

10.Write into the memory by pressing

and .

to the 0 level.

and for: 135+ 3 VDC

then

— 17 —

KV-27S42/27S46/27S66/29AL42/29AL42C/29AL66/ 29AL66C/29SL42/29SL42C/29SL46/29XL42M

Digltal

Multimeter

TP600

+ –

ABL11

+ –

Ammeter

3mA DC Range

T505

FBT

R584

+ –

Digital

Multimeter

C574

1SS119

–

Power Supply

Figure 1

— 18 —

KV-27S42/27S46/27S66/29AL42/29AL42C/29AL66/

29AL66C/29SL42/29SL42C/29SL46/29XL42M

SECTION 5

CIRCUIT ADJUSTMENTS

Use the Remote Commander (RM-Y168) to perform the circuit adjustments in this section. NOTE: Test Equipment Required:

• Pattern generator

• Frequency counter

• Digital multimeter

• Audio oscillator

5-1. Setting the Service Adjustment Mode

1. Standby mode (power off).

Display Channel

Sound volume Power ON

on the Remote Commander (press each button within a second).

Service Adjustment Mode On

1. The CRT displays the item being adjusted.

Disp.

Item

(Item)

Data

SERVICE HSIZ 0

2. Press or on the Remote Commander to select an item.

3. Press

4. Press

or on the Remote Commander to change the data.

then to save into the memory.

5-2. Memory Write Confirmation Method

1. After adjustment, remove the power plug from the AC outlet, then plug it in again.

2. Turn the power switch ON and set to service mode.

3. Call the adjusted items again to confirm they were adjusted.

5-3. Adjust Buttons and Indicators

Service Adjustment Mode Memory

SERVICE WRITE

MUTING

ENTER

1. Press then on the Remote Commander to initialize.

SERVICE RESET

Carry out step 1 when adjusting IDs 0–4 and when replacing and adjusting IC003.

2. Turn set off then on to exit service adjustment mode.

Green

Red

— 19 —

+ 42 hidden pages