Sony KV43TR27, Trinitron KV-13TR27 Service Manual

KV43TR27

RM-781

SERVICE MANUAL

US Model

Chassis No.

SCC-D37L-A

Canadian Model

Chassis No.

SCC-D36H-A

P-3B

CHASSIS

Television system

Channel coverage

Picture tube

Power requirements
Power consumption

Accessories supplied

Optional accessories

Speaker size :

American TV standards
VHF : 2-13
UHF : 14-69

MODELS OF THE SAME SERIES

1 KV-13TR24X

I

I

KV-13TR14,‘13TR24

SPECIFICATIONS

Speaker Impedance
Speaker Wattage
Dimensions
Weight

812

Approx. 2W
Approx. 356X 331 X 407 mm (w/h/d)
Approx. 10.5kg

Cable TV : 1-125
Mirror black Trinitron tube
13-inch picture measured diagonally

14-inch picture tube measured diagonally

VIDEO IN (phono jack) : lVp-p,

75ohms unbalanced, sync negative

AUDIO IN(phono jack) : 408mVrms

(100%

modulation)

impedance : 47k ohms

120V AC, 60Hz
97W (Max.) 3W (STAND BY)

Remote Commander RM-781

.

with 2 size AA (R6) batteries
VHF/UHF telescopic dipole antenna (1)
Antenna connector (1)

U/V mixer EAC-66

Connecting cord

VMG606M/607M,

etc.
77mm X 1

Designs and specifications are subject to change without
notice.

TRINITRONB

COLOR TV

SONY@

TABLE OF CONTENTS

Section Title

m

1. GENERAL

1-1.

Location

of

Controls.. ....................................... .

l-2.

Presetting

TTJ

Channels.. ....................

Z..

...........

5

1-3.

Watching

TT,~

Programs..

..................................

.

l-4.

Adjusting

the Picture

.......................................

6

1-5.

Enjoying the Convenient Features ....................7

l-6.

Timer/Block..

................................................... .

2. DISASSEMBLY

2-l.

Service Position

..............................................

10

2-2.

Picture Tube Removal ....................................

11

3. SET-UP ADJUSTMENTS

3-l.

Beam Landing

.................................................

12

3-2.

Convergence.. ..................................................

13

3-3.

Focus ..............................................................

14

3-4.

Sub

BRT

.........................................................

14

3-5.

White Balance .................................................

14

WARNING !!

ATTENTION!!

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.

AFIN D’EVITER TOUT RISQUE D’ELECTROCUTION

PROVENANT D’UN CHkBIS SOUS TENSION, UN
TRANSFORMATEUR D’ISOLEMENT DOIT ETRE

UTILISC LORS DE TOUT

DiPANNAGE.

LE CHk!SlS DE CE RiCEPtEUR EST DIRECTEMENT

RACCORO~ i& L’ALIMENTATION SECTEUR.

SAFETY-RELATED COMPONENT WARNING !!

COMPONENTS IDENTIFIED BY SHADING AND MARK

A

ON THE SCHEMATIC DIAGRAMS, EXPLODED

VIEWS AND IN THE PARTS LIST ARE CRITICAL TO
SAFE OPERATION. REPLACE THESE COMPONENTS
WITH SONY PARTS WHOSE PART NUMBERS APPEAR

AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS

PUBLISHED BY SONY. CIRCUIT ADJUSTMENTS

THAT ARE CRITICAL TO SAFE OPERATION

AkE

IDENTIFIED IN THIS MANUAL. FOLLOW THESE PRO-

CEDURES WHENEVER CRITICAL COMPONENTS ARE

REPLACED OR IMPROPER OPERATION IS SUSPECTED.

Section

4. SAFETY RELATED ADJUSTMENT....................... 15

5. ELECTRICAL ADJUSTMENTS
5-1.

A Board

Adjustment

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

17

6. DIAGRAMS

6-1.

Circuit Board Location.. .................................

19

6-2.

Printed Wiring Board

.....................................

20

6-3.

Schematic Diagram ..........................................

23

6-4.

Semiconductors.. ..............................................

27

7.

EXPLODED VIEW

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

28

8.

ELECTRICAL

PARTS LIST

. . . . . ..a............................

29

ATTENTION AUX COMPOSANTS RELATIFS A LA

ShURITi!!

LES COMPOSANTS IDENTIFIiS PAR UNE TRAME ET

PAR UNE MARQUE

ASUR

LES

SCHiMAS

DE PRiNCIPE,

LES VUES EXPLOSiES ET LES LISTES DE PIECES
SONT D*UirE IMPORTANCE CRITIQUE POUR LA

SiCURlTi

DU FONCTIONNEMENT. NE LES REM-

PLACER QUE PAR DES COMPOSANTS SONY DONT LE

NUMiRO DE PIiCE EST INDlOUi DANS LE

PRhENT

MANUEL OU DANS DES SUPPLiMENTB PUBLliS PAR
SONY. LES RiGLAGES DE ‘*CIRCUIT DONT L’IMPOR-
TANCE EST CRITIQUE POUR LA SkCURITi DU

FONCTIONNEMENT SONT IDENTIFIES DANS LE

PRiSENT MANUEL. SUIVRE CES PROCiDURES LORS

DE CHAOUE REMPLACEMENT DE COMPOSANTS
CRITIQUES. OU LORSQU’UN

MAUVAIS

FONCTIONNE-

MENT EST SUSPECTi.

-2-

SAFETY CHECK-OUT

(

KV-13W871

(US Model only)

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 inierboard wiring to ensure that no
wires are “pinched” or contact 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 cord for cracks and abrasion.

Recommend the replacement of any such line

cord to the customer.

7.

Check the condition of the monopole antenna
(if any).
Make sure the end is not broken off, and has
the plastic cap on it. Point out the danger of

impalement on a broken antenna to the
customer,

and’ recommend the antenna’s

replacement.

8.

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

9.

Check the antenna terminals,

meta!

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 microampers).

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 instru­ments.

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 0.75V, so

analog meters must have an accurate

low-

voltage scale. The Simpson 250 and Sanwa

SH-63Trd are examples of a passive VOM that
is suitable. Nearly all battery operated digital
multimeters that have a 2V AC range are
suitable. (See Fig. A)

HOW TO FIND A GOOD EARTH GROUND

A cold-water pipe is guaranteed earth ground; the
cover-plate 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 cold-water pipe is not accessible,

connect a 60-100

.watts

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 of the line, the lamp should light at

normal brilliance if the screw is at ground potential.
(See Fig.

B)

To Exposed Me tat

Parts on Set

I

0.15pF

AC

voltmeter

10.75 VI

I

-

Earth Ground

liig. A.

Using an AC voltmeter to check AC leakage.

Fig. 6.Checking for earth ground.

Trouble Light

Cold-water Pipe

-3

SECTION I

GENERAL

l-l. LOCATION OF CONTROLS

Ffefer

to the

pai

mdlcated I” 0 for detals

Monitor-

I

P

r----------u
I
I

I

I

b

I

I

1---------I

TV,VIDEO button ’

me....

control detector

VOLUME

+/-

buttons

TfMER lamp

CHANNEL

+/-

buttons

bOWER

switch

On-screen displays

a *

Channel numbers
. “MUTfNG”or “SLEEP” mdlcatlon
. ‘VIDEO

lndlcatu3n

b) -

‘AUTO PROGRAM’, ‘TIMER or TIMER

BLOCK mdlcaton

c) *

Bar dwplay for volume OP

picture

adJustmeN

.

Currpnt +,me

for

Twner/Block

AUDIO IN jack

VIDEO IN jack

VHF/UHF antenna terminal

RemotecornmandsrRY-781

MUTING button

TIMER/BLOCK setting buttons

-

(TIMER/BLOCK, CLEAR, AM/PM,

OFF/REPEAT)

Channel presetting buttons

-

(AUTO PGM, ADD, ERASE)

Channel number buttons

-

DISPLAY button

PICTURE

+I-

buttons

*

VOL (volume)

+I-

buttons

-

-SLEEP

button

-*

POWER switch

Picture adjusting buttons
(SELECT, RESET, LEVEL

1

CABLE button

*

TV/VIDEO button

6)

ENTER button
JUMP button

*

CH (channel) +/-buttons

-The functions of these buttons
are also

available

on ihe TV.

. In normal operaton.

batteries will

last up to half a year.lf

the Commander does not operate properly, the

batteries

might

be exhausted Replace them wth new ones.

l To

avoid

damage from

posstble

battery leakage, remove
the battenes when the Commander wll not be used for a

long me.

l If a Remote Commander that

IS

not recommended IS used

to operate

this N.

or of the suppked Remote Commander

1s

used to operate another N. the TV may not operate
properly

l-2. PRESETTING TV CHANNELS

RM-781

1

Press POWER on the TV or the Remote
Commander to turn the N on.

To preset VHF or UHF

To preset cable TV

channels channels

3

Press AUTO PGM.

“AUTO PROGRAM IS dlsplayed on the screen and recavable

channels (other than the channels already preset) wll be preset I”

numerical sequence The channels

prewously

preset reman I” the

umt’s

memory

When no more channels can be found the

programrmng

stops ant

the lowest numbered channel IS dIsplayed

Recewable channels of thls TV are:

I

VHF 2.13

TO check Preset channels

PESS CH +,-

1 UHF ,469 I

Cable

1

125

I,

the “VIDEO”

md,catlon IS dasplayed

on the screen

To add the channels that

could

not be preset wth

automatic
p,og,amm,ng because the,, s,gna, strength was loo weak or lo

erase unnecessary channels, follow the steps I”To preset only

Press the TVNIDEO bunon on the TV or the Remote
Commander so that a channel “umber appears

the

dewed

channeis on the next Page

-ENTER

1

Press the channel number button(s) and then ENTER to select

the channel to be added or erased.

2

To add channels - Press A

ADD

a

A ‘+ appears ior a moment

This

channel has now bee” added to the channel scan memory

To erase channels - Press ERASE.

ERASE

T3

A - appears for a moment

Thus

channel has now bee” erased from the channel scan memory

The next

t,me

the CH +/- button IS pressed

this

channel

will

be

skipped

Repeat steps 1 and 2 for other channels to be added or erased

CableT” channel chart’

Cable TV systems use letters or numbers 10 designate channels
To tune I” a channel refer lo the

cha”

below

Number on this TV

1

5

6 14 15 15 17 18 19 20 21 22 23 24 25 26 27 28 29 30

Correspo”d!“g

CAT” channel A 8 A-7 A-6 A

B

c 0

E

FGHIJK

LMNOPrI

39

. . . . . . . . . . . . . . . .

$3 95 96 97 98 99 100 to, 102

..__

123 124 125

115 1\4 4\3 .a2 1\? w-59w.60~.6

W.82 W.83

wed

Check

w,th your local cable TV company for more complete

.

The des,g”at,on of the cable TV channels conformS 10 the

,nformabon on the ava,,able channels

EWNCTA recommendat~o”

I

aa

I

l-3. WATCHING TV PROGRAMS

ENTER-

RM-781

1

Press POWER on the N or the

Remote

Commander to turn the N on.

Press SELECT repeatedly

unto1

the on-screen

display

of the

Item

lo be adjusted

appears. then press LEVEL +/-

Press CABLE so that the

appropriate

RESET

SELECT

LEVEL+/-

purplish

To

wew

VHF or UHF

To wew cabel TV

channels

channels

3

Select a channel in one of the

followmg

two ways:

To scan the preset

:

To select a channel dwectly,

channels in numerICal :

press the channel number

SeCf”e”Ce,

I button(s) and then ENTER

press CH

+I-

I For example, to select channel
1

10.

press 1 0 and ENTER

f

o

0

-PICTURE +/-

- LEVEL +

no

r--I

RM-781

~~

decrease 1

=

1

k-*

- 1 TO

mcrease

color mterwty

-

L

color

lntenslty

BRIGHT (brightness)

- LEVEL +

IO

1

’

Darker

1

- .y

Srlghter

SHARP (sharpness)

- LEVEL +

4

press VOL + or-to adlust the volume.

f

0

Note

To turn off the N

To

adlust plCt”FZ COtItraSt

IZF-

press

to

InCreaSe pcture

cm,,ras, w,,h wwd

color

Press POWER on the TV or the Remote Commander

awn

PICTURE

14. ADJUSTING THE PICTURE

HUE

- LEVEL +

-\

Sharper

l-5. ENJOYING THE CONVENIENT FEATURES l-6. TIMER/BLOCK

MUTING-

DISPLAY-

RM-7t

-SLEEP

Muting the sound

Press MUTING.

The “MUTING” indication will appear on the screen.
To restore the sound. press MUTING

agal”

or VOL +

Keeping the channel displayed

Press DISPLAY.

To make the channel display disappear, press DISPLAY

agal”.

Using

the SLEEP timer

-JUMP

Press SLEEP

The TV will be turned off automatically after about one hour.
The green “SLEEP ON” indication will appear on the screen
for a few seconds when SLEEP 1s pressed and the red
“SLEEP” indication will appear one mmute before the TV is
turned off.
To cancel the SLEEP timer, press SLEEP

agam.

or turn off
the TV. The “SLEEP OFF” indication will appear when
SLEEP is pressed

agam.

Switching quickly between two channels

Press JUMP

Each time JUMP IS pressed. the channel which appeared on
the screen directly before IS recalled.

Thts

button enables

you to keep track of two programs alternately.

Internal clock

Once the Internal clock IS set. the current time will appear on the screen.
It IS necessary to set the clock correctly to activate the program stalt TIMER and channel

Program start

TlMER

Makes a program of your

choice

appear on the screen automatically at the dewed time.

Channel BLOCK

Blocks a channel from appearmg on the screen for 12 hours.
Use channel BLOCK to mevent children from watchma undesirable

proarams.

The buttons used for the above functions
are located on the Remote Commander.

CLEAR

I

I

TIMER/BLOCKTIMER/BLOCK

AM/PM
OFF/REPEAT

Channel numberChannel number

buttons

I

ENTER

To set the mternal clock, program start TIMER and channel BLOCK,

YOU

must summon the corresponding “pages”. “clock page.” “TIMER page”
and “BLOCK page.”
To change the “pages”. press TIMEWBLOCK.

IT/Bstands for the TIMEWBLOCK button.

k--l

“AM”/“PM”

indication disappears

before “AM/PM”

T/B

a

All settmgs will be erased from the unit3 memory it the umt 15 unplugged. or if a power

failure

omws.

. The TIMER and BLOCK will overate ontv if :he clock is set correctI”.
. ,I the TIMER and BLOCK are

;et tar o”&pp,“g

times .,n the

sam;

channel. the

blocked channel wilt appear on the screen at the time set on the TIMER.

I

co

I

Example: To set the clock to

9:OS

PM

1

Press TIMER/BLOCK once to change from “normal page”

to

“clock

page.-

TIMEWBLOCK

“clock page”

2

Press 0.9,O. 5 AM/PM (0 necessary).

I I 1

3

If you have performed the operation correctly, press
ENTER.
The numbers will “wmk” to

Indicate

that the clock has been

set. (The 0 m front will disappear.)

ENTER

If you have made a mistake, press CLEAR and return to step 2.
The “AM/PM” indication will disappear after 2 seconds.

To summon “TIMER page,” press TIMER/BLOCK before
the “AM”/“PM” indication disappears.

To retwn to

“normal

page,” press TIMER/BLOCK after

the “AM”/“PM” indication has disappeared.

To reset the clock, s”mm~” “cloCk page” and

Press

CLEAR

before the “AMY’PM” indication disappears. Then follow the

Make

sure

that the clock has been set correctly before Setting the channel BLOCK.

Example: To set the BLOCK for a program which begins at

930 AM

on channel 9

1

Press TIMER/BLOCK three times to change from “normal
page” to “BLOCK page.”

TIMEWBLOCK

“BLOCK page”

(indications m red)

2

Press

0.9.3.0.

ENTER (0 necessary).

Numbers will “wmk” to

Indicate

that the time has been Set.
Press 8, ENTER (0 not necessary). Numbers will “wmk” to

Indicate

that the channel has been Set.

The BLOCK has now been set.

If you have made a mstake, press CLEAR and return to
step 2.

At the preset time, the

picture

of the selected channel will
be blocked from wew and the sound will be muted.
A red “BLOCKED’ indication will appear on the screen while
the channel is blocked.
Normal reception will be resumed after 12 hours.

To return to normal reception white the channel is blocked,
recall “BLOCK page” and press CLEAR.

The BLOCK setting blocks a speafled channel for the same

12.how pewad everyday.

TO clear BLOCK setting. summon “BLOCK page” and Press
CLEAR.
To reset, clear the setting and follow fhe steps

above

from

steo 2.

I

W

Make sure that the clock has been set correctly before setting the program start TIMER.

Example: To set the TIMER for a program

which

begins at IO:30 PM on channel 12

1

Press TIMERBLOCK once to change from
“normal page” to “clock page.”

TIMEWBLOCK

“clock page”

2

Press TIMER/BLOCK before the “AWf’PM”

indlcabon

disappears and summon “TIMER

page

,*

TIMER/BLOCK

“TIMER page”

3

Press 1.0.3.0, AM/PM, ENTER

Numbers

will

“v,“W lo

lndlcate

that the

bme

has

been

SB,

&I&;,

. I 6

AM/PM ENTER

4

Press 1,2, ENTER (0 not necessary)
Numbers

will

“wmk” to

mdlcate

that the

channel has been set

The TIMER lamp

wtll ltght

up to

lndlcate

that the TIMER has

been set

If you have

made

a

nIlstake, p’ess

CLEAR

and ref”m 10 step

3

me TIMER operates Only once. but the bme and the channel I”,,,

remam m fhe “W’s

memory

A, the preset

tme,

the selected channel

WI,,

appear on the screen

and the TIMER lamp wtll go out The TIMER

w,,,

operate whether

you are wa,ch,ng a TV Program or a VCR playback. or

eve”

If you

have turned OR the TV

If you want to preset the same channel at the same time for a

MUE

de, press OFF~EPEAT

me

TIMER lamp

w,,

,lght “p

lo indwte ,hai

the TIMER has been r.?acWa,ed

If no

button

is pressed within 2 hours after the preset time. an

‘OFF

,“d,ca,,on “,,I, appear

on

the screen

for 1

m,n”,e If

a

bunon

1s sttll

no,

,o”cCed during

the 1

m,n”,e. the

TV wl,

turn

o”

a”tOmatlCally

a* a

safely

precautvx

If you want

to

deact,vate

the TIMER, press OFF/REPEAT

agan so that ,he TIMER ‘amp goes out I, IS no, necessary to
summa” -TIMER page” to “se the OFF/REPEAT

bun””

F”“hermore. ,h,s

button 15

effective even 1, the

TV has bee”

,“m?.d ofi

To clear the TlUER setting. summon “TIMER page” and press
CLEAR
To reset. clear the seblng and lollaw the s,ePs from step 3