Sony KV-EF34M31 User manual

SERVICE MANUAL

CHASSIS

BG-3S

MODEL COMMANDER DEST. CHASSIS NO. MODEL COMMANDER DEST. CHASSIS NO.

KV-EF34M31

RM-951 OCE SCC-N99A-A

KV-EF34M61

RM-951 GE SCC-U12D-A

KV-EF34M80

RM-951 ME SCC-U16E-A

KV-EF34M90

RM-951 HK SCC-U17C-A

KV-EF34M90

RM-951 JE SCC-P01A-A

KV-EF34M91

RM-951 ME SCC-U16D-A

TRINITRON

COLORTV

MICROFILM

– 2 –

KV-EF34M31/EF34M61/EF34M80/EF34M90/EF34M91

RM-951

SPECIFICATIONS

Note

Power requirements 110-240 V AC, 50/60 Hz

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

Television system B/G, I, D/K, M

Color system PAL, PAL 60, SECAM, NTSC4.43, NTSC3.58

Stereo system NICAM Stereo B/G, I; A2 Stereo (German) B/G

Teletext language English, Arabic, French

Channel coverage

B/G VHF: E2 to E12 / UHF: E21 to E69 / CATV: S01 to S03, S1 to S41

IUHF: B21 to B68 / CATV: S01 to S03, S1 to S41

D/K VHF: C1 to C12, R1 to R12 / UHF: C13 to C57, R21 to R60

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

MVHF: A2 to A13 / UHF: A14 to A79 /

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

˘(Antenna) 75-ohm external terminal

Audio output (Speaker) 15W + 15W*

Number of terminal

D(Video) Input: 4 Output: 1 Phono jacks; 1 Vp-p, 75 ohms

≥(Audio) Input: 4 Output: 1 Phono jacks; 500 mVrms

(S Video) Input: 2 Y : 1 Vp-p, 75 ohms,

unbalanced, sync negative

C : 0.286 Vp-p, 75 ohms

(Component Input: 1 Phone jacks

Video) Y : 1 Vp-p, 75 ohms, sync negative

CB: 0.7 Vp-p, 75 ohms

CR: 0.7 Vp-p, 75 ohms

Audio : 500 mVrms

2(Headphones) Output: 1 Stereo minijack

Picture tube 34 inch

Tube size (mm) 859 Measured diagonally

Screen size (mm) 800 Measured diagonally

Dimension (w/h/d, mm) 859 ×660.5 ×573.5

Mass (kg) 83

SAFETY-RELATED COMPONENT WARNING!!

COMPONENTS IDENTIFIED BY SHADING AND MARK !ON

THE SCHEMATIC DIAGRAMS, EXPLODED VIEWSAND IN THE

PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE

THESE COMPONENTS WITH SONY PARTS WHOSE PART

NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN

SUPPLEMENTS PUBLISHED BY SONY.

CAUTION

SHORT CIRCUIT THE ANODE OF THE PICTURE TUBE AND

THE ANODE CAP TO THE METAL CHASSIS, CRT SHIELD, OR

CARBON PAINTED ON THE CRT, AFTER REMOVING THE

ANODE.

* 10% distortion

Design and specifications are subject to change without notice.

– 3 –

KV-EF34M31/EF34M61/EF34M80/EF34M90/EF34M91

RM-951

TABLE OF CONTENTS

Section Title Page

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

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

2. DISASSEMBLY

2-1. Rear Panel Removal ................................................ 30

2-2. Speaker Box Removal............................................. 30

2-3. Chassis Assy Removal ............................................ 30

2-4. Service Position ....................................................... 30

2-5. D1 and DH Boards Removal .................................. 31

2-6. J1 Board and RF Splitter Removal ......................... 31

2-7. V1 and P Boards Removal ...................................... 32

2-8. A and B Boards Removal........................................ 32

2-9. H1 Board Removal.................................................. 32

2-10. Demagnetization Coil Removal .............................. 32

2-11. Top Switch Removal ............................................... 33

2-12. Picture Tube Removal ............................................. 33

3. SET-UP ADJUSTMENTS

3-1. Beam Landing Adjustment...................................... 35

3-2. Convergence Adjustment ........................................ 36

3-3. Focus Adjustment .................................................... 38

3-4. Neck Assy Twist Adjustment .................................. 38

3-5. G2 (Screen) and White Blance Adjustment............ 39

4. CIRCUIT ADJUSTMENTS

4-1. Adjustments with Commander ............................... 40

4-2. Adjustment Method ................................................. 41

4-3. Picture Quality Adjustments ................................... 48

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

Replacement ............................................................ 49

4-5. Picture Distortion Adjustment................................. 50

Section Title Page

5. DIAGRAMS

5-1. Block Diagrams ....................................................... 51

5-2. Frame Schematic Diagram ...................................... 61

5-3 Circuit Boards Location .......................................... 65

5-4. Schematic Diagrams and Printed Wiring Boards ... 65

(1) Schematic Diagram of A Board .............................. 66

(2) Schematic Diagram of B Board .............................. 77

(3) Schematic Diagram of P Board............................... 85

(4) Schematic Diagrams of D2 and J1 Boards ............ 91

(5) Schematic Diagrams of H1 and F Boards .............. 95

(6) Schematic Diagrams of DH and VM2 Boards ....... 99

(7) Schematic Diagrams of C and B4 Boards .............. 103

(8) Schematic Diagram of V1 Board ............................ 107

5-5. Semiconductors ....................................................... 110

6. EXPLODEDVIEWS

6-1. Picture Tube ............................................................. 112

6-2. Chassis ..................................................................... 113

7. ELECTRICAL PARTS LIST...................................... 114

– 4 –

KV-EF34M31/EF34M61/EF34M80/EF34M90/EF34M91

RM-951

The units in this manual contain a self-diagnostic function. If an error occurs, the STANDBY/TIMER lamp will automatically

begin to flash.

The number of times the lamp flashes translates to a probable source of the problem. A definition of the STANDBY/TIMER

lamp flash indicators is listed in the instruction manual for the user’s knowledge and reference. If an error symptom cannot

be reproduced, the remote commander can be used to review the failure occurrence data stored in memory to reveal past

problems and how often these problems occur.

1. DIAGNOSTICTEST INDICATORS

When an errors occurs, the STANDBY/TIMER lamp will flash a set number of times to indicate the possible cause of the

problem. If there is more than one error, the lamp will identify the first of the problem areas.

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

Diagnostic

Item

Description

• Power does not

turn on

• +B overcurrent

(OCP) or

overvoltage

(OVP)

• Vertical deflection

stopped

• Horizontal

deflection

overdrive

• White balance

failure (no

PICTURE)

• Micro reset

No. of times

STANDBY/TIMER

lamp flashes

Does not light

2 times

5 times

—

Self-diagnostic

display/Diagnostic

result

—

002:000 or

002:001~255

003:001~255

004:001~255

at the same time

005:000 or

005:001~225

101:00 or

101:001~225

Probable

Cause

Location

• Power cord is not plugged

in.

• Fuse is burned out F4601

(F)

• H.OUT Q511 is shorted. (A

board)

• IC701 is shorted. (C board)

• -13V is not supplied. (A

board)

• IC 503 faulty (A board)

• G2 is improperly adjusted.

(Note 2)

• CRT problem.

• Video OUT IC701 is faulty.

(C board)

• IC301 is faulty. (A board)

• No connection A board to C

board.

• Discharge CRT (C Board)

• Static discharge

• External noise

Detected

Symptoms

• Power does not come on.

• No power is supplied to the

TV.

• AC power supply is faulty.

• Power does not come on.

• Load on power line is

shorted.

• Has entered standby state

after horizontal raster.

• Vertical deflection pulse is

stopped.

• Power line is shorted or

power supply is stopped.

• No raster is generated.

• CRT cathode current

detection reference pulse

output is small.

• Power is shut down shortly,

after this return back to

normal.

• Detect Micro latch up.

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

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

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

SELF DIAGNOSTIC FUNCTION

– 5 –

KV-EF34M31/EF34M61/EF34M80/EF34M90/EF34M91

RM-951

2. DISPLAY OF STANDBY/TIMER LIGHT FLASH COUNT

Diagnostic Item Flash Count*

+B overcurrent/overvoltage 2 times

Vertical deflection stopped

White balance failure 5 times

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

3. STOPPINGTHE STANDBY/TIMER FLASH

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

from flashing.

Lamp ON 0.3 sec. Lamp OFF 3 sec.

Lamp OFF 0.3 sec.

2 times

5 times

STANDBY/SLEEP lamp

– 6 –

KV-EF34M31/EF34M61/EF34M80/EF34M90/EF34M91

RM-951

4. SELF-DIAGNOSTIC SCREEN DISPLAY

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

is possible to bring up past occurances of failure for confirmation on the screen:

[To Bring Up Screen Test]

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

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

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

Self-Diagnosis screen display

002 : 000

003 : 000

004 : 000

005 : 001

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

Numeral "I" means a fault has been detected.

101 : 000

SELF DIAGNOSTIC

5. HANDLING OF SELF-DIAGNOSTIC SCREEN DISPLAY

Since the diagnostic results displayed on the screen are not automatically cleared, always check the self-diagnostic screen

during repairs. When you have completed the repairs, clear the result display to “0”.

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

completion of the repairs.

[Clearing the result display]

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

screen is being displayed.

Channel [8] /0

[Quitting Self-diagnostic screen]

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

– 7 –

KV-EF34M31/EF34M61/EF34M80/EF34M90/EF34M91

RM-951

6. SELF-DIAGNOSTIC CIRCUIT

[+BovercurrentªOCPº] Occurs when an overcurrent on the +B(135) line is detected by Q604(A board). If

Q604(A board) go to ON and the voltage to pin 18 of IC301(A board) should go down

when V.SYNC is more than seven verticals in a period, the unit will automatically turn off.

[Horizontaldeflectionoverdrive] Occurs when an overdrive on H drive line is detected by D526(A board). Power supply

will be shut down when detect it.

[Verticaldeflectionstopped] Occurs when an absence of the vertical deflection pulse is detected by Q509(A board)

and IC001(A board) shut down the power supply.

[Verticaldeflectionovercurrent] Occurs when an overcurrent on V drive line is detected by Q507(A board). Power supply

will be shut down when detect this by IC001(A board).

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

detected by IC301(A board). TV will stay on, but there will be no picture.

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

IC301

Y/CHROMA JUNGLE

FROM

CRT

FROM

[+B] Q604 C

[H] D526

[V] Q509/507

IC001

SYSTEM IC003

MEMORY

B-DAT

IO-SDAT

IK-IN

MP/

PROTECT

IO-8DAT

O-LED

SDA

54521

18 51

4635

– 8 –

SECTION1

GENERAL The operating instructions mentioned here are partial abstracts from the

Operating Instruction Manual. The page numbers of the Operating In-

struction Manual remein as in the manual.

Using Your New TV

VIDEO

VIDEO IN

VIDEO OUT

AUDIO

123

(MONO)

Getting Started

Step 1

Connect the antenna

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

CAUTION

Do not connect the power cord until all other connections are complete;

otherwise, a minimal current leakage through the antenna and/or other

terminals to the ground could occur.

Connecting a VCR

To play a video tape, see page 10.

Using Your New TV

IEC connector

(not supplied)

To video and

audio outputs

VCR

(yellow)

-L (MONO) (white)

-R (red)

To S video

output

Antenna cable (not supplied)

Audio/Video cable

(not supplied)

S video cable

(not supplied)

: Signal flow

(S video input)

To antenna

output To ˘

(antenna)

: Signal flow

Antenna cable (not supplied)

Antenna cable

(not supplied)

Using Your New TV

Notes

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

yellow jack) and the black plug to -L (MONO) (the white jack).

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

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

• Do not have concurrent connections of video equipment to the …3 (video

input) jacks at the front and the …3 (video input) jacks at the rear of your

TV; otherwise, the picture will not be displayed properly on the screen.

• When both the (S video input) and …1 (video input) are connected,

the ␣ (S video input) is automatically selected. To view the video input

to …1 (video input), disconnect the S video cable.

Step 2

Insert the batteries

into the remote

Note

• Do not use old batteries or different types of batteries together.

Step 3

Preset the channels automatically

Tip

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

Now You Are Ready. . .

The channels are now automatically preset

in your TV. To preset the channels manually,

see page 37.

AUTO

PROGR

ONE-PUSH AUTOMATIC PROGRAMMING

AUTO PROGRAM

TV SYS :AUTO

VHF LOW

PR:

– 9 –

Using Your New TV

(MONO)

123

(MONO)

Connecting optional components

You can connect optional audio/video components, such as a VCR, multi disc player,

camcorder, video game, or stereo system. For operations of the connected equipment,

see pages 10 and 25.

Connecting a camcorder/video game equipment

using the …(video input) jacks

Notes

• You can also connect video equipment to the …1, 2, or 3 (video input)

jacks at the rear of your TV.

• Do not have concurrent connections of video equipment to the …3

(video input) jacks at the front and the …3 (video input) jacks at the rear

of your TV; otherwise, the picture will not be displayed properly on the

screen.

• When both the (S video input) and …1 (video input) are connected,

the ␣ (S video input) is automatically selected. To view the video input

to …1 (video input), disconnect the S video cable.

Connecting audio/video equipment using the Ú

(monitor output) jacks

Note

• When connecting a monaural VCR, connect the yellow plug to (the

yellow jack) and the black plug to -L (MONO) (the white jack).

To S video output

Front of TV

Camcorder

Video game

equipment

To video and

audio outputs

: Signal flow

(S video

input)

…

(video input)

Audio/Video cable (not supplied)

S video cable (not supplied)

(yellow)

-L (MONO)

(white)

-R (red)

Rear of TV

antenna

output

To video and

audio inputs

Audio system

audio

inputs

VCR

: Signal flow

To Ú

(monitor

output)

Antenna cable (not supplied)

Audio/Video cable

(not supplied)

Using Your New TV

VIDEO

R-AUDIO-L

LINE OUT

123

(MONO)

Notes

• Some DVD player terminals may be labeled differently:

• Since the high quality pictures on a DVD disc contain a lot of information,

picture noise may appear. In this case, adjust the sharpness (“SHARP”) in the

PERSONAL ADJUST menu of the PICTURE MODE menu (see page 30).

• Connect your DVD player directly to your TV. Connecting the DVD player

through other video equipment will cause unwanted picture noise.

DVD player

Audio/Video cable

(not supplied)

DVD player

L (white)

R (red)

Audio cable

(not supplied)

To component

video output

Component

video cable

(not supplied)

(yellow)

-L (MONO) (white)

-R (red)

To …1, 2, or 3

(video input)

: Signal flow

To audio

output

: Signal flow

(component

video input)

Connect To (on the DVD player)

Y (green) Y

(blue) C

, B-Y or P

(red) C

, R-Y or P

Connecting a DVD player

Connect …1, 2, or 3 (video input) / (audio/video) connectors on your TV to

LINE OUT on your DVD player.

Connecting a DVD player with component video

output connectors

1 Connect R and L under (component video input) on your TV to the LINE OUT,

AUDIO R and L output connectors on your DVD player.

2 Using a component video cable, connect Y, CB, and CRunder (component video

input) on your TV to the COMPONENT VIDEO OUT Y, CB, and CRoutput

connectors on your DVD player.

VIDEO

R-AUDIO-L

LINE OUT

COMPONENT VIDEO OUT

S VIDEO OUT

R L Y C

– 10 –

Using Your New TV

3.8mm

Securing the TV

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

With the supplied screws, attach the stabilizer band to the TV stand and to

the rear of the TV using the provided hole.

Pass a cord or chain through the clamps and secure them to the rear of the

TV and a wall or pillar.

Note

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

Using Your New TV

Number buttons

PROGR +/–

continued

123

456

-/--

231

564

897

JUMP

PIC MODE

PROGR

A/B

PIP PROGR

ZOOM

LEFT

FAVORITE PROGR

INDEX

ZOOM

RIGHT

SURROUND

SOUND

MODE

PIP PROGR

VIDEO

TITLE

ENTER

Watching the TV

This section explains various functions

and operations used while watching the

TV. Most operations can be done using

the remote.

Press Uto turn on the TV.

When the TV is in standby

mode (the u/Â/

indicator on the TV is lit

red), press uon the remote

or on the TV.

The PROGR +/–, .+/–,

and …indicators on the

TV light up.

Press PROGR +/– or the

number buttons to select

the TV channel.

For double digit numbers,

press ÷, then the number

(e.g., for 25, press ÷, then

2 and 5).

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