SONY KV-13M42, KV-13M52, KV-13M53, KV-14MB42, KV-14MB42C Service Manual

SERVICE MANUAL

MODEL COMMANDER DEST CHASSIS NO.

BA-4D

CHASSIS

KV-13M42 KV-13M42 KV-13M52 KV-13M53 KV-14MB42 KV-14MB42C

RM-Y156 US SCC-S27D-A RM-Y156 CND SCC-S28A-A RM-Y156 US SCC-S27E-A RM-Y156W US SCC-S27F-A RM-Y156 E SCC-S25P-A RM-Y156 E SCC-S25Q-A

MICROFILM

RM-Y156KV-13M52

TRINITRON® COLOR TV

KV-13M42/13M52/13M53/14MB42/14MB42C

SPECIFICA TIONS

KV-13M42 KV-13M52

KV-13M53

KV-14MB42

KV-14MB42C

AUTO VOLT

Power Requirements 120V, 60 Hz 120V, 60 Hz

120-220V, 50/60 Hz

Number of inputs/outputs

Video Input Audio Input

(1)

(2)

121 111

Speaker Ou tpu t (W) 3W 3W 3W

Power Consumption (W)

In Use (Max) 75 75 75 In Standby 1 1 1

Dimensions (W/H/D)

(mm) 358 x 355 x 401.4 mm 358 x 355 x 401.4 mm 358 x 355 x 401.4 mm

(in) 14

/8x14x157/8in 141/8x14x157/8in 141/8x14x157/8in

Mass

(kg) 10 kg 10 kg 10 kg (lbs) 22 lbs 22 lbs 22 lbs

1 Vp-p 75 ohms unbalanced,syncnegative

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

Television system

American TV standard/NTSC

Channel coverage

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

Visible screen size

13" picture measured diagonally

Actual screen size

14" picture measured diagonally

Antenna

75 ohm external terminal for VHF/UHF

Supplied Accessories

Remote Commander (RM-Y156) Remote Commander (RM-Y156W) (KV-13M53 ONLY) Size AA (R6) batteries (2) Antenna connector Antenna dipole Converter (EAC-25)

Design and specifications are subject to change without notice.

(•) SRS (SOUND RETRIEVAL SYSTEM)

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.

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.

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KV-13M42/13M52/13M53/14MB42/14MB42C

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 ....................................................................................................................................................12

2-2. A Board Removal ..........................................................................................................................................................12

2-3. Service Position ............................................................................................................................................................12

2-4. Picture Tube Removal ..................................................................................................................................................13

3. SET-UP ADJUSTMENTS

3-1. Beam Landing ............................................................................................................................................................... 14

3-2. Convergence ................................................................................................................................................................. 15

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

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

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

3-6. White Balance Adjustments .......................................................................................................................................... 16

4. SAFETY RELATED ADJUSTMENTS

4-1. R582 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 .................................................................................................................................................... 22

6. DIAGRAMS

6-1. Block Diagram...............................................................................................................................................................27

6-2. Circuit Board Location ..................................................................................................................................................30

6-3. Printed Wiring Boards and Schematic Diagrams......................................................................................................... 30

• A Board ......................................................................................................................................................................33

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

6-4. Semiconductors ............................................................................................................................................................42

7. EXPLODED VIEW

7-1. Chassis ......................................................................................................................................................................... 43

8. ELECTRICAL PARTS LIST ................................................................................................................................................ 44

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KV-13M42/13M52/13M53/14MB42/14MB42C

WARNINGS AND CAUTIONS

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.

WARNING!!

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

SAFETY-RELATED COMPONENT WARNING!!

COMPONENTS IDENTIFIED BY SHADING AND MARK ON THE SCHEMATIC DIAGRAMS, EXPLODED VIEWS, AND IN THE PARTS LIST ARE CRITICAL FOR SAFE OPERATION. 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 OPERATION IS SUSPECTED.

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'APPAREIL, OU AU COUCHE DE CARBONE PEINTE SUR LE TUBE CATHODIQUE 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'ALIMENTATION SECTEUR.

ATTENTION AUX COMPOSANTS RELATIFS A LA SECURITE!!

LES COMPOSANTS IDENTIFIES PAR UNE TRAME ET PAR 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 PAR 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 Test 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

Description

Power does not tur n on Does not light

+B overcurrent (O CP )* 2 times 2:0 or 2:1 • H.OUT (Q502) is sh ort ed. (A Bo ard)

Vertic al def lection stopped* 4 times 4:0 or 4:1 • +13V is not supplie d. (A Board)

White balance fa ilure (not balanced)

No. of Times

STANDBY/TIMER

LED Flashes

5 times 5:0 or 5:1 • Video OUT (Q392 –Q39 4) is f ault y (A Board)

Self-diagnostic Display/

Diagnostic Result

Probable Cause

Location

• Power cord is no t pl ugge d in.

• Fuse is burned out (F6 01).

• IC751 is shorted. (C Board)

• IC541 is faulty. (A Board)

• IC301 is faulty. (A Board)

• Screen (G2) is im pro perly adjusted. * *

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 stat e af te r horizontal ras te r.

• Vertical deflecti on pulse is stopped.

• Power line is shorted or power sup ply is stopped.

• No raster is generated.

• CRT cathode current detection reference pulse output is small.

* 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.

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

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KV-13M42/13M52/13M53/14MB42/14MB42C

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.

STANDBY/TIMER LED

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 LED 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.

To Bring Up Screen Test

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

Display Channel

Self Diagnostic Screen Display

SELF DIAGNOSTIC

2: 0 3: N/A 0 4: 0 5: 1 101: N/A 0

Sound volume

Numeral “0” means that no fault was detected.

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

Power ON

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

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KV-13M42/13M52/13M53/14MB42/14MB42C

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:

ENTERChannel

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.

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.

V ertical 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.)

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SAFETY CHECK-OUT

Trouble Light

AC Outlet Box

Ohmmeter

Cold-water Pipe

KV-13M42/13M52/13M53/14MB42/14MB42C

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 battery-operated 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).

To Exposed Metal Parts on Set

AC Voltmeter (0.75 V)

Earth Ground

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

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The instructions mentioned here are partial abstracts from the Operating Instruction

User Guide

Connecting Additional Equipment

TV and VCR

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.

(Optional Connection)

If your VCR is equipped with video inputs, for best picture quality you should connect A/V connectors to AUDIO/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.

✍

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

Manual.The page numbers shown reflect those of the Operating Instruction Manual.

Connecting Your TV

Read this chapter before setting up your TV for the first time. This section covers basic connections in addition to any optional equipment you may be connecting.

KV-13M42/13M52/13M53/14MB42/14MB42C

SECTION 1 GENERAL

Basic Connections

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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 orientation of the antenna for best reception.

Connecting Your TV

User Guide

TV, VCR, 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 IN jack on your VCR.

Connect a coaxial cable from OUT on your VCR to VHF/UHF IN on your TV.

(Optional Connection)

✍

If you will be controlling all channel selection through your cable box, you should consider using the CHANNEL FIX feature on page 17.

TV and Cable Box

— 9 —

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) and use the cable box’ s remote control to change channels.

✍

If you will be controlling all channel selection through your cable box, you should consider using the CHANNEL FIX feature on page 17.

KV-13M42/13M52/13M53/14MB42/14MB42C

Connecting Your TV

Using the Remote Control and Basic Functions

This section shows you how to use more advanced buttons on the remote control and how to use the on-screen menus.

Turns the TV off automatically in approximately 30, 60 or 90 minutes. Cancel by pressing until SLEEP OFF appears.

Instantly turns off the sound. Press again or press to restore sound.

Cycles through the available video inputs. Press once to show current time, (if set) and channel number.

Press again to activate CAPTION VISION settings, if available. To cancel, press again until DISPLAY OFF appears.

Cycles through the Multi-Channel TV Sound (MTS) options: STEREO, SAP (Second Audio Programming) and MONO, (KV-20S42, 20S43 only).

Press for channel selection, the channel will change after 2 seconds.

Press after selecting a channel using the - buttons to immediately activate selection.

Alternates back and forth between the last two channels selected with the - buttons.

Displays the on-screen menu. Press again to exit the menu at any time.

Activates highlighted selections in the on-screen menu. Moves the cursor in the on-screen menu.

Press to restore factory settings while in the on-screen menu.

✍

Buttons shown are for remote control RM-Y155, your remote control may not look exactly like the one illustrated.

Connecting a Camcorder

Using A/V cables, connect AUDIO and VIDEO OUT on your camcorder to AUDIO and VIDEO IN on your TV.

KV-13M42/13M52/13M53/14MB42/14MB42C

(Front A/V Panel)

A/V output

— 10 —

✍

For model KV-13M42, this connection can be made to the A/V input located on the rear of the TV.

Other Information

User Guide

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. customers only) or (416) 499-SONY (7669) (Canadian customers only).

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

❏ Make sure CABLE is set to OFF in the SET UP menu

(page 17).

❏ Use AUTO PROGRAM to add channels that are not

presently in the memory (page 17).

Cable stations don’t seem to work

❏ Make sure CABLE is set to ON in the SET UP menu

(page 16).

❏ Use AUTO PROGRAM to add channels that are not

presently in the memory (page 17).

Remote control does not operate

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

The TV needs to be cleaned

❏ 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.

Lost password for PARENTAL CONTROL

❏ In the password screen, enter the following master

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

Other Information

Troubleshooting

— 11 —

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

No picture, no sound

Poor or no picture, good sound

Good picture, no sound

No color ❏ Adjust COLOR in the VIDEO menu (page 13). Only snow

appears on the screen

Dotted lines or stripes

Double images or ghosts

❏ 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 settings: when watching TV , set

to TV; when watching video equipment, set to VIDEO (page 13).

❏ Check your PARENTAL CONTROL settings, (see

pages 22-23).

❏ Make sure the batteries have been inserted correctly

into the remote control.

❏ Try another channel, it could be station trouble. ❏ Adjust PICTURE in the VIDEO menu (page 13). ❏ Adjust BRIGHTNESS in the VIDEO menu (page 13). ❏ Check the antenna and/or cable connections (page 3). ❏ Press so that MUTING disappears from the

screen (page 9).

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

SAP (page 14).

❏ Check the CABLE setting in the SET UP menu

(page 17).

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

broadcasting.

❏ Adjust the antenna. ❏ Move the TV away 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.

KV-13M42/13M52/13M53/14MB42/14MB42C

2-1. REAR COVER REMOV AL

SECTION 2

DISASSEMBLY

Rear Cover

Four Screws BVTP (4x16)

2-2. A BOARD REMOVAL 2-3. SERVICE POSITION

C Board

Claw

A Board

— 12 —

+ 28 hidden pages

SONY KV-13M42, KV-13M52, KV-13M53, KV-14MB42, KV-14MB42C Service Manual

SPECIFICA TIONS

TABLE OF CONTENTS

SELF-DIAGNOSTIC FUNCTION

DISASSEMBLY