Philips CTV S26K497, CTV S26K497/15 Servlce Manual

CTV S26K497lrc

Servlce

manual

P

tups

o

@

@

@

Volume control

Tone

control

Brlghtness

control

Contrast

control

o

@

o

75

O

F"M

sound

magnetlc

I.

F. chromln[utce

electro-

statlc

Subcarri.er

38.

I

MHz

Malns voltage

32.9

MHz Power

consumptlon

Band I

(WIF)

47

-

68 MHz

Band III

(VHF)

1-74

-

230 MIlz

Band IV

+

V

(LIHF)

470

-

890 MlIz

Rl3

81

R976

Rl3 80

R92

9

Saturatlon

control

R1382

Hue control

R1043

VItrF

+

IJHF

hmtng

U14

6,0 MHZ

34,47

MHz

4.43

MHz

220 - 240

V

280 W

@

@
@

Slrlted

for receptlon of black-whlta and colour

transmltters

operatlng

according

to CCIR-PAL standard.

Aerlal

match-tng

Convergence

tr'ocus

strng

I.

F. lumlnance

I.

F. sound

s)

604

PURLEY

WAY

.

WADDON.

CROYDON

.

CHg

4DR

TELEPHONE:

0l-686

0505 (Recorded

messages after business hours) TELEX: 262308

Index:

CS27062-CS27074, CS26984,

CS26985,

CS27075

Matns

swlteh

SKl

Black-whhte/colour

swltch

SK-3

Speech/muslc

swltch

SKz

Subject

to modification

4822

727 L0525

Printed in the

Netherlandg

csz7062

WARNINGS

.

As

the chaesls ls llve lnde@nddnt of the

posltlon

of

the

malns

plug

the set shcrld be

connected

to the rnalng vla an lsolatlng

trangformer

(approx,

500

VA) wben the rear

panel

ls

removed.

.

Due

to the htgb tenslon

(ca.

25 kV) the valves ln

the HT cage

produce

a

certaln amount

of

X-radiatlon.

However, when

the

cage ls closed

the screenlng

ls

so effectlve that the X-rays

ca:mot

leave the cage.

To

prevent

that the set can operate wlth opened HT cage a

safety swltch has

been

provlded

whlch

lnterrupts the

92

voltage for

the llne

output valves.

Thls ewltch should never

be

closed

or shunted when

the

cage ls

open.

After

repalr

ensure tlat

all Bcrews tn

tle ltd

are

properly

tlghtened.

.

Never replace

valves or components whlle

the

set ls

svltched

on.

.

U6e safety

goggles

when replaclng

the

plchrre

tube,

. When replaclng

valves

or

other componenta ln

the HT cage,

removlng

the

chasels

and

replaclng the

plcture

tube, ftrst

short-clrcult

the residual

charge

on the

plcture

tube. For

thls connect a

properly

lnsulated wlre

to the

chaesls and

hold

the

other

end agalnst the H.T. connectlon for a few

seconds.

.

Be careful when meagurlng

the voltages on

the tube Bocket.

The focusslng

voltage

(on

potnt

9) ls approx.

4.5 kV,

REMARKS

1. The osclllogtams have been measured under

the

followlng

condltlons.

a. For

the

black and whlte sectlon a cross hatch

pattern

has been used as lnput stgnal

and

for the chromlnance

sectlon a colour bar

pattern.

b. The brtghtness contrl, lcrob 3, at normal brlghtness.

c.

The

contrast control, Imob 4, set to 4 Vp-p on

the

control

grtd

of the vldeo output valve.

d. Saturatlon

control larob

5,

set

to

40 mV

p-p

on the base

of TS439.

e. The hue control, lcrob 6 ln the mechanlcal mld-posltlon

2.

The dlrect voltages

have been measured as follows:

No aerlal slgnal, minlmum brlghtness,

maxlnum

contrast

and

saturatlon.

The voltages

ln

the chromlnance sectlon marked

wlth an

x

have been measured wtth

the

colour/black-whtte swltch ln

posltlon

'rcolour"

and the collector

and

emltter of TS443

lnterconnected.

3. If

a

blank

pattern

ls required when

the

PM

5507

ls used,

thls

pattern

can be obtalned by means of

the

ralnbouw

slgnal,

the vldeo knob turned fuIly clockwlse and

the

black/whtte-switch

of the set

turned to

posltlon

blacVwhtte.

4. Integrated clrcult

TAA550

(U414)

mounted on

p.

c.

board

8,

ls avallable

ln varlous verslons

under one code number.

These verslons are malked as

follows:

a.

Red

or

yellow

palnt

dot.

The

Zener

voltage ls between 30 and 33

V.

Thls I. C. may

be

marked as

follows:

No code number

or

code

number 30 on the houslng

of

the I. C.

In

this

case

the brtdge wlre should

be fttted

tn

parallel

wtth

Rl513.

b.

Green

palnt

dot :

The Zener voltage ls

between

33 and 36

V.

Thts

I.C. may

be marked as follows:

Code-number 33 on

the

houslng

of the I. C.

In thls case no brldge wire

should be fltted ln

parallel

wlth

R1513.

MECHANICAL

INSTRUCTIONS

1.

-

Remove the

screw from the

upper slde of the

cover to the

left of the rear

panel,

and remove thls

cover.

Note: The

c(nvergence

panel

ls

provlded

wlth explalnlng

slgns to facllttat€

converglng. The numbers

lndtchte

- the

sequence of

converglng.

2. Hlnglng out

the chassls

-

Remove

the rear

panel

and, subsequently, the

nylon

locking

pln

from the

rtght-hand

upp€r slde of the chassls

-

Push

the

plastic

locldng

plate

on the rtght-hand urderslde

of the

chassls

to

the rtght.

3.

Removlng the chassls.

-

Hlnge out the

chassls.

-

Remove

the

plugs

A,B,C,E,F,H,L,M

-T-2.

-

Remove the

prlnt

of the

plcture

tube.

-

Unsolder

the two

earth

leads.

-

Detach

the

suspenslon

cord from

the

chassls.

-

Detach

the

H. T.

-cable

from

the

plcfure

tube.

-

Llft the

chassls

out

of the

two

hlnge

polnts

and

remove

lt

from

the

chassls.

4.

Removlng

the

control

panel

-

Remove the

cover

from

the

convergence

panel.

-

Remove

the

convergenee

panel

from

tire

set.

-

Remove wlth a

long screwdrlver.the

two

screws from

the

under- and

the

upperslde

of the

control

panel.

-

Remove

the

slx larobs

(volume,

tone

,

etc.

)

from

the front

of

the

set

and

remove

the

control

panel

backrvards.

5.

Removlng

the

push-button

unlt

-

Remove the

plugs

X and

Y.

-

Remove the three flxtng screws.

-

Remove

the

push-button

unlt.

6.

Replaclng the hrnlng

potentlometers

-

Remove the

push-button

unlt.

-

Remove the

cap from

the

push-button

unlt.

-

Unsolder

the

leads from the defectlve

potentlometer

strip.

-

Bend

the tag

wlth whlch

the strlp

ls flxed,

upwards.

-

Replace the strtp

wlth

the

potentlometer.

7.

Replaclng

the

p.

c.

board of

the band

swltch of

U14

-

Remove the hrnlng

unlt from

tlre

set.

-

Remove the

screenlng cap

and

the

polnter.

-

Loosen

the

ftxlng

screw

from

the

p.c.board

of the band

swltch and

pull

the

p.

c.

board

outwards.

(Attentton!

Do

not

damage the contact sprlngs.

)

-

Write

down

the

colours

of the

connectlng wlres and

un-

solder

them.

-

Connect

the

new

p.

c.board and

place

lt ln

posltlon,

carefully ltftlng up

the

contact sprlngs.

-

Reftt

the

polnter

and adjust

the helght

of the

p.c.board

so

that the

polnter

can

move

unhampered.

8.

Replaclng

valves

ln

the hlgh-voltage

cage.

-

Flrst

read

the

warnlngs.

-

Remove

the

cover

from

the

H.

T.

cage.

-

Loosen the serews fixtng the

top

plate,

a

few

hrrns;

push

thls

plate

upwards.

Consequently, the

PD500

ls

algo

movlng

upwards so that

lt

can

be easlly

removed.

-

Push

the

valve of valve holder GY

501

sllghtly upwards

so

that

the top

connectlon

of thls valve can be removed.

-

Now

the

valve

can

remove from

the

holder.

9.

Removlng

the

convergence

colls

-

Remove the

multlpole

plugs

N,O,

and

P.

-

Insert

a

thln

screwdrlver

tnto

the

mlddle opening

(Flg.

2)

and carefully

press

the

screwdrlver downwards.to dlsengage

the

locklng

pln.

-

Now

the

convergence coll can

be wlthdrawn.

Note:

When

the

coll ls lnserted agaln

lnto the holder,

one

should hear

the

holder cllcktng

ln

the

openlng of

the

coll.

Fig.2

csz 7063

GR163

/oatr.e

TS

121

,

L22,L23,L58

BLOCK DIAGRAM

SOUND

s526,527

B

-Y-001

B-P-002

GR160

/oarcz

u1l.'17

TS 426

B

-T-007

TS

521

-

8402t

U5540

U554

B

-C-010

U562

od,o

B-C-015

TS

/.3/.

B- C-012

I

tE_AMp.

I

cHRol

i

DETEc

B

-S

-001

B -S-005

U 536o,

U

553

b

B

-L-007

LUM

INA

N

CE

U536c

GR459,

/,70

,L72,L73

TS/,25, L27,L28,L29

B/,01, 416t

I

I

BURS'

BURST

AMP

io,ra*,",*

I

B

-

L-010

H OR IZON

TA L

TS

/.52,

453

6R

/.90, /,91

8408t 8408p

U589

e

GR

495

Bl.10,t'11,u2 8L13, L1L

B

-T-

008

B-L-009

B

-T-007

IF.

AMPLIFIER

LUM.IF.AMP.

CHROM. IF.

AMP.

OETECTOR

B-C-010

B-L-008

U553o

B-r-007

PULSE

AMP

PHASE DISCR

VERTICAL

TS455

TS 456

6R

496

8116p

,

L17

T597

B-T-002

B-T-003

EMITTER

FOLLOWER

(

L uM.)

B

-T-007

TS15r 6R488

INTERFERENCE

SUPPR

PULSE

AMP.

AUT. FIELD SYNC.

TRANSDUCTOR

OCK

DIAGRAM

CHROMINANCE

TS/.36

/

tstls

IE-A MP,

CHROM.

DE

T

ECTOR

CHROM.

AMPLIFIERS

B

-C-012

B

-C-011

U562

od,of,oi,op

TS

435

U 563

k

U

563

n,t,

B-C-016

TSI.I3,LLL

GR479

R 1215

CHROM.

AGC.

REACT

CIRCUIT

I

-

---1suB.osc

AMP

suB

oscrrL.

:

"WHITE"

SETTING

COLOUR KILLER

+

WHITE

SWITCH

U553e B-C-017 B- C-018

B-B-007

_

CH ROM. VIDEO

-

u578

i.f

8403,10/.,

405

TS

/.3/.

GR

198

R1299/

|

R

1307

B

-

B-007

TS

t

L\,Ll.2 GR

493

B -C

-012

TS 4/.7

GR 185,

/.86

BLUE LATERAL

CONV.

STAT. CONV,

B-B-009

r

B-B-009

HOR

CONV.

VERT.

CONV

B-B-002

|

B-B-003

COLOUROIFF.

AMPS.

+

DC

LEVEL

SETTIN6

(R-Y)AMPLIFIER

BEAM CURRENT

SETTING

TS

445

MULTIVIERATOR

(B-Y)AMPLIFIER

499,500

R1315

The

lay-out of thls block

dlagram

follows the

lay-out of the

clrcult dlagram

as

closely

as

posslble.

Wtth

the

aid of the

numbers

of

the

valves,

unlts, etc. stated

above the

blocks, the

relevant sectlon of

the ctrcult

dlagram

can

be

located eaeily. The

numbers

below the

blocks

lndlcate

the

chapter of the

SERV-O-MECUM

ln

whlch

the

worldng of

these

clrcuits ls descrlbed.

B- C

-0i5

B- C-012

B-C-012

B-C-013

B-C-

029

B

-C-0

12

/

R1323

I

T V

2/.16

v7

841

R

1125

u572

R

1050

(R-Y)'+(a-v)'l+

+*

€

(R-Y)'+

(g-Y)'

u 569

u 553

SATURATION//CONTRAST

TD

570

u 552

R

997

32.?

MHz

R1126

u 578

lDENTIF.T,SkHz

u

s62

u536

v5L7

TD

5/.0

R 1055

5,5

MHZ

R

2o A

1338

2b

6.tlt,

1o

Q

n37

1b

-

1336

R

ao

o1Z:rL

4b

Or|rs

5o

Sr5rs

sb o

tlrc

8o

Or!r,

sb

orlre

6o

Q

t5rt

@t$v

1

330

o
o

3/,,5

MHz

@e

33,1

MH

z

Oo

SK9

SK8

sl(10

G2

Blr!

R

1299

R1307

s 598

R 1303

R1298

R1306

cs27065

KONVERG.

Fig.

3

Y

r03

I

72

l

R1258

R909

+25

8

L1L

PD

5OO

s

598

G2

8119

B

419

s6o4

R1299

R1307

R

1215

HOR.

SYNC

BALANCE

B

41

AlBA11

2

R 1207

R1212

Fig.

3

A

ADJUSTMENTS

t- Adiustlng

for

a stralght

ptchrre

(see

Flg.3)

Sllghtly

loosen screw

B. T\rrn the

complete

deflectlon

unlt stlghtly to the

left or to the

rlght untll the

plchrre

ls

stralght.

Ttghten

screw

B agaln.

2 Focuslng

(see

Flg. 3)

Set

potentlometer

ap of U589 so that the entlre

plcture

ls

as

sharp

as

posslble

at

hlgh brtghbress.

3

Pln-cushlon

correctlon

(see

Flg. 3)

z.

Wlth

the

atd

of

5598

and Rl292

make

the

horlzontal

llnes

at

the top

and

bottom of

the

plcture

as

stralght

as

possible.

b.

Wlth

the

atd

of R1179

make the

vertlcal

llnes

ln

the

mlddle

of

the

plchrre

as

stralght

as

posslble.

Horlzontal

llnearlt

(see

Flg. 3)

Thls

ts adjusted

wlth the core

ln coll x

of U589.

Vertlcal llnearlty

(see

Fig.

3)

a.

Devlatlons

over

the full

plchrre

helght

are

corrected

wlth

the

ald of

R1273.

b.

Devlatlons

ln

the top

of the

plchrre

are

corrected

wlth

the

ald

of R1284.

Plcture

helght

(see

Ftg.

3)

Thts

ls adjusted wlth

R1266.

StatLc

convergence

(see

Flg.3)

Use

a

dot or cross-hatch

pattern.

a. Swttch

off the blue

gun

wlth SK1l, see Flg. 3.

Make

the

red

and

green

patterns

colnclde ln the

centre

of

the

plcture

by

means of lmob

la

and knob

lb.

Thus

a

yellow

pattern

ts obtalned.

Srrltch on

the

blue

gun

agaln.

b.

Adjust lmob 2a and 2b so

that

the blue

pattern

and

the

yellow

pattern

colnpl$e in

the

centre

of the screen.

As

a result a whlte

pattern

ls

obtained.

Note: If no satlsfactory result

ls

obtalned,

lt ls

possl-

ble to

lnterchange

the termlnals

S1-S2

of the

-blue

lateral

untt,

see Fig.

3.

10

Dynamlc

convergence

(see

Flg. 4)

Remove the

cover

ln front

of the

convergence

panel.

Start

by checklng

ild,

lf necessary,

readjustlng

the statlc

convergence

(see

polnt

?a

and 7b).

Use

a crossl'hatch

pattern,

swltch

off

the

blue

gun

wlth

SKll.

If

the

centre horlzontal

green

and

red llnes

lntersect,

turn

the

core

of

S604

(see

Flg.

3)

untll

the

llnes

are

parallel

as

far

as

posslble

or

untll

they

colnclde.

Slttch

on SKll.

.

Wlth lcrobs

7a, 7b

and

7c

(only

lf

the convergence

strongly

devlates): start

wtth the

lsrobs ln

the mld-posltlon.

Make

the

central

horlzontal blue llnes as

stralght

as

posslble.

.

Srvltch

off

the blue

gun

(SK11).

.

Wlth

lonob 3:

Adjust

so

that

the horlzontal red

and

green

llnes

are

parallel

over

the entlre

plcture

wldth.

.

Wlth

lmobs 4a and

4b:

Adjust

so that the central vertlcal red

and

green

llnes

are

parlllel

over the entlre

plchrre

helght.

.

Wlth

lmobs

5a

and

5b:

Adjust

so

that

the dlstance beiween

the

horlzontal

llne

palrs

(red

+

green)

ls

equal over the entlre

plcture

helght

ln

the

mtddld

of the screen.

.

Wlth

lmobs 6a

and 6b:

Adjust

so that

the

dlstance

between

the

vertlcal

llne

palrs

(red

+

gleen)

ls

equal over the entlre

plcture

wldth ln

the

mlddle

of the

screen.

.

Cary

out

red and

green

statlc

oonvergence

(see

polnt

7a).

.

Wlth

lmobs

7a, 7b and 7c:

Adjust

so

that

the

central

horlzontal

blue llne

and

the

correspondlng

horlzontal

yellow

Ilne are

parallel

over

the entlre

plchrre

wldth.

.

Wlth

lorobs

8a

and 8b:

Adjust

so that the dlstance between

the

horlzontal

llne

palrs (blue

and

yellow)

ls

equal over

the entlre

plcture

helght ln

the

mlddle

of the screen.

.

Statlc convergence

(see

7a and

?b).

.

Wlth

lmob

9:

Adjust

so

that

the dlstance

between

the

vertlcal ltne

palrs

(blue

and

yellow)

ls

equal

over the entlre

plchrre

wtdth ln

the

mlddle

of

the,screen.

Note: If no satlsfactory result ls

obtalned lt

ls

posslble

to

lnterchange

the termlnals

R1-R2 of

the

blue

lateral unlt, see Flg. 3.

.

Statlc

convergence

(see point

7a

and 7b).

11

At

the

back

of the set above

the

addltlonal

loudspeaker

socket

there

are

the knobs

R, G

and B (Rl302-R1298

and

R1306 respectlvely)

behlnd

the

cap

on the rear

panel.

Wtth

these knobs

the

background

colour

can be

adjusted

accordlng

to the

wlshes

of the

customer.

7.

Centrlng

(see

Flg. 3)

a.. Wlth

R1290 the

picfirre

carr

be shtfted

dlrectlon.

b.

Wlth

R1289

the

plcture

can be shlfted

dlrectlon.

ln

the

horlzontal

ln

the

vertlcal

Colour

purltv

(see

Flg.

3)

Allow

the set

to

warm up for

approx.

20 mlnutes.

Apply

a

blank

pattern

slgnal. The

room

should be

as

dark

as

posslble,

brlghtness

and contrast

should be set

to

normal

llght

lntenslty. Slltch

off the

green

and

blue

guns

by

means

of

SK8 and SK10 respectlvely.

Loosen the

four

wlng

nuts A a

few firrns

and

sllde

the

deflectlon coll

as

far

as

possible

forwards

or bac}ilvards

untll the red blur on the screen

ls as

small

as

posslble.

After

thls

the

red spot

ls

centred

as

well

as

posslble

by

means

of

colour

purlty

rlngs

C.

After

thls the

deflectlon coll ls

slld back untll

the

entlre

screen

ls

unlformly red. Subsequehtly, check

the

blue

and

green

colour

purlty

by flrst swltchlng on

only

SK8

and

then

only

SK10. When after

thls

SK8,

SKg

and

SK10

are

swltched on slmultaneously, a

unlformly

whlte

plcture

should be obtalned. Thls

plcture

should contaln

no

blurg.

If

lt

contalns blurs, correctlon

to some extent

ls

posstble

by

sllghtly

hrrnlng

the

colour

ptrrlty

rlngs and/or

sllghtly

movlng

the

deflectlon coll. After

thls the three

colours

should

be rechecked

lndivldually.

Tlghten

the

wlng nuts

agaln.

If no

prqper

result

ls

obtalned the

complete

procedure

should

be

repeated.

For

checklng

the

landtgg of'the

electron

beams

on the

phosphor

dots,use

can

be

made of

mlcroscope tlrye

800/

MLS,

ordertng

number

4822 395

90041.

csz?066

3.

1.

2.

7.

8.

ADJUSTMENTS

AFTER

REPAIRS

IF-AGC

Adjust

R1003

for ma:rlmum nolse ln

the

plcture

(no

stgnal).

HF-AGC

Thls clrcult

ls only

operatlve

at very

strong

lnput slgnals.

If

the

plcfure

of

a

local

transmltter

ls

dlstorted,

adjust

R997 so that the

plcture

ls

undlstorted.

Horlzontal

tlme base

(use

a cross-hatch

pattern)

a.

Connect

junctlon

C785/R1170

(M7)

to

chassls.

Adjust

U587 so that the

plcture

ls stralght.

Remove the

connectlon

between

junctlon

C785/R11?0

and chassls.

b. Connect

bTS453 to

chassls.

Adjust

Rl162

so

that the

plcture

ls stralght.

Remove

the

connectlon

between bTS453

and

chassls.

Booster voltage

(a)

and

booster dlode current

(b)

(use

a

cross-hatch

pattern)

a.

Connect

a

valve voltmeter

(range

1000

V d. c.

)

between

junctlon

C860/5590

(r'-'r)

and

polnt

10

of U589

(Ml0).

Adjust

Rl207 to

550

V

meter

deflectlon.

b.

Connect

a

valve voltmeter

between

9B410

(M8)

and

3B411

(M9).

Adiust

Rl203 to

0 V meter'deflectlon.

Check the

voltage

under

a agaln and,

lf necessary,

correct

lt.

Note:

The booster voltage

should

be

aceurately adjusted

to the

value speclfled

and

should

never

exceed

thls

value.

Also

take

lnto:

account

the tolerances of the

measurlng

lnstrument

used

and

ensure that the

mains voltage

does

not

devlate.

5.

Beam

current llmttatlon

(use

a

plaln

whlte

and

synchronl-

zed raster)

Brlghtness and contrast

to

maxlmum.

Remove

jumper

across

R1213

(wlre

support

on

hlgh-vol-

tage cage).
Connect voltmeter across

R1213

and

adjust for

0.1 V

wlth

F"L2]-2.

Subsequently,

brlghtness and contrast

to

mlnlmum.

The

meter readlng

should now be

1.

3

V

(t

0. 1

V)

Reflt

jumper

across

R1213.

Check

the booster voltage. For any

eorrectlons see

polnt

4a.

Cut-off

polnt

of

plcture

tube

(use

no

aerlal

slgnal)

Remove

slngle

plug

from

p.

c. board 4.

(CRT-base

panel)

R1298, R1302

and

R1306

(g2-flne

adjustment)

to

mld-

posltlon.

Make

the room as

dark

as

posslble.

The

potentlometers

mentloned

below should be

adjusted

so

that the screen

just

remalns

dark.

R1299

for

the

green gun

(swltch

on SK8 and swltch

off

SK9+SK10

).

R1303 for

the

red

gun

(swltch

on

SK9 and

swltch

off

SK8+SK10

).

R1307

f.or

the

blue

gun (swltch

on SK10 and

swltch off

SK8+SK9).

Swttch

on

SK8 and

SK9 and reflt

the

slngle

plug.

Apply

a

black

/whLte

test

pattern

from a transmltter or

a

generator,

and

vary

the

brtghtness

from hlgh to low

wlth

the brlghtness control.

Lr so

dolng, the

grey

hue should not change.

Correct

any

devlatlons

at a

low level

of brlghtness

by

means

of

larobs

G,

R,

and

B.

(Rl

29 8

,

R130

2 and

R130

6).

+25

Supplv

Voltage

Connect

a

voltmeter

between the collector of

TS421

and

chassis.

Adjust

R909

so that

the

meter

readlng

ls 24.6

V.

Vertlcal

tlme

base

(use

a

cross-hatch

pattern)

Short-clrcult

RL246.

Connect

an

8.2 M0

reslstor between

the

cursor of

R1258

and

28416.

Adjust

R1258

untll

the

plcture

ls statlonary;

Remove

the

short-clrcult and

the

8.2 M0

reslstor.

Vertlcal output stage

Connect

a

voltmeter between

784L7 and chassls.

Adjust

Rl280 to

the

voltage value lndlcated

on

the

chassls.

10.

Trackln of saturatlon

and contrast

(appty

a

colour

slgnal)

Contrast

and

sahrratlon

controls

to

maxlmum.

Connect

an

oscllloscope

to

7M05; measure and note down

the

peak-to-peak

value

of the

colour

slgnal.

Connect

the oscllloscope to

7 8401; measure and

note

down the

dlfference ln voltage

between the black

and

the

whlte

level.

Reduce thls voltage wtth the

ald

of the

contrast control

to

Z/S of.

the

value

measured.

Connect the oscllloscope

again

to

78405

and adjust

R1055

to

2/3

of the

voltage measured

at

thls

polnt.

11.

@

(e.

g.

after

replacement of

plcture

tube;

use a blank

pattern)

Set the

colour swltch

SK3 to

posltlon

black

a^nd

whlte.

Use

another

set of the

same type

as a

reference;

thts

set

should

be

connected

and adjusted

ln

the same

way.

Allow

both sets

to

warm

up for

approx.

10

mlnutes.

Adjust the

cut-off

polnt

of the

new

plcture

tube

(see

polnt

6).

If requlred,

correct t};re

92

flne

adjustments

(R1298,

R1302

and 1306) untll the

llght

lntenslty of

both

tubes

ls

the

same

(at

low brlghtness).

Next,

set both hrbes

to

a

hlgh brlghtness.

If the

whlte

oolour of the

new hrbe

devlates, the

cursors

A,

B

and

C

of

sllde

potentlometer

R1215

(see

Flg.3)

should be

adjusted

untll the

whtte tones

of

both

tubes

are

approxlmaterly

the

game.

If

the

sllders

A and

B of

sllde

potentlometer

R1215

have to

cross each other,

the

jumpers

V2

and V3 on

the

plcture

tube

prlnted panel

can

be

soldered

ln

the

other

positlon.

In both sets

remove

SV3

and connect

the

pln

of

SV3

on

the

p.

c.board to the

+25

V

(junctlon

R9L4/R905

on

prlnt

5).

Now

eqtrallse the

white colours

wtth cursor D.

Rernove

the lnterconnectlon

and

reflt termtrral

SV3.

4.

6.

9.

csz 7067

(J

TRIMMING

INSTRUCTIONS

Note

s :

Durlng trimmlng

the T.

V.

set should

be connected to the

malns vla an

lsolatlng

transformer

(500

VA).

The

measurlng equlpment

should

be

properly

earthed.

Applvlng

the

IF-slgnal

Apply

the

IF-slgnal

vla

1000

pF

capacltor to

polnt

G of the

VHF

channel selector

(prlnt

8).

A.

LUMINANCE

CIRCUIT

1.

The

IF st es *

lumlnance detector

(see

Flg.

3)

Set

the

band

swltch to

posltlon

UHF

and apply

unmodulated

IF

slgnals

of approx.

10

mV

to the

IF

lnjectlon

polnt

on

the VHF

channel

selector

(see

polnt

2

under

"Notes").

Turn the

contrast

control to

ma:r.

Appty a dlrect voltage

of

5.5

V between

junctlon

R1003/

C681

(measurlng

polnt

'tN'.I?rr)

and chassls

('r-rr

at chassls).

Connect

a

valve

voltmeter

(posttbn

10 V d. c. negatlve)

to

junctlon

S45I/C654

(test

potnt

'?M3"),

arid adjust

the

cores

mentloned below for

mlnlmum meter deflectlon.

"frf

of.

1J552

at 30.

9

MItz

tt

rfef

r

of. U552

at 30.

9

MHz

x

rrlil

of.

1J552

at 40.

9 MHz

x

rfirr

of

U552

at 40.9 MHz

x

f rdil

of U553

at

33,

1

MHz

rrdrr

of

U536

at 33,1

MHz

rfe'r

of U536

at34,5MHz

xtr

U551

at 32.7 MHz

x

Cores

f

'et'

and

ttj,

of

U552

are hollow and

are

located

at

the top of the

coll

can.

Coll

'ff'f

and

tflfr

are accesslble by

means of

a

trlmmlng

key

through the

hollow cores

rferr

and

rrjrr.

xx

For

adjustlng

thls

core

flrst lnterconnect the

collector

and

emltter

of TS443.

Checklng the

IF

bandpass

curve

Set the band swltch to

posltlon

UHF

and

apply a

wobbulator

slgnal

of

36 MHz

(sweep

10'MHz)

to the

IF lnjectlon

polnt

of the VHF channel selector.

Apply a dlrect

voltage of

5.5

V between

junctlon

R1003/C681

(test

polnt

ttMz'?)

and

chassls

(rr-rf

to

chassls).

Connect

an

oscllloscope

to

polnt

1

of

U536.

The

curve

should be

as

sho'urn

ln

Flg.

7

.

When

the

collector and

the

emltter

of

TS443

are lnterconnected,

the dotted

curve

of Fig.

?,

should be

obtalned.

3

0,gMHz

>500

x

41,5

MH2

THE

CHROMINANCE

CIRCUIT

The

IF chromlnance

detector

(see

Flg. 3)

Set

the band

swltch

to

posltlon

UHF

an

apply an unmo-

dulated 36.8

MHz

slgnal of

approx. 10

mV

to the

IF

lnjectlon

polnt

on the

hharurel

selector

(see

polnt

2

under

|tNotestt).

Apply

a dlrect

voltage of

5. 5

V between

junctlon

R100s/Clat

(test

polnt

"M2")

and

chassls

(ff-''

to

chassls).

Connect

a valve

voltmeter

(posltlon

10

V d.c., negatlve)

to

polnt

1

of U554

(test

polnt

ttlU,.f.z9rr)

and

adjust core

I'in'r

of U554 for

mfurlmum

deflectlon.

Checklng

the

IF

bandpass

curve

Set

the

band

swltch to

posltlon

UHF

and

apply a

wobbu-

lator slgnal

of

36 MHz

(sweep 10

MHz)

to the

IF lnjectlon

polnt

on the \IHF

channel

selector.

Apply a

voltage of

5.5 V between

junctlon

Rl003/C681

(test

polnt

rfM2")

and

chassls

(tr-r'

to chassls).

Connect an

oscllloscope to

polnt

1

of U554

(test

polnt

f rM29 rt).

The

curve

should be

as

shown

ln

Flg.8.

30,9MHz

>500x

41,5

MH

z

>70x

B.

1.

1.

2

2.

,

Fig.8

\

\

2

I

I

3.

The

4.43

MHz

chromlnance-ampllfler,

see Flg. 3

Pull

out

the

IF

cable at

the

bottom-left

on the chassls

Turn

the saturatlon

control

to

max.

and

set

black-whtte/

colour

swltch

(SK3)

to

posttl-on

"colours'f

.

hrtercormect

the

collector

and

emltter of

TM43.

Connect

an

oscllloscope (prosltlon AC)

or

valve

voltmeter

wlth

frequency range up

to 6

MHz

to the collector

of

TS439.

Apply an

unrnodulated 6 MHz

slgnal

(approx.

10

mV)

to

polnt

1of

U55A

(test

polnt

I'M29rr)

vla

a

capacltor

of

2200

pF

and adjust

core

I'bf

f

of U558 for mlnlmum

ampllhrde,

Now apply 15,5

MHz

slgnal and adjust

core

t'err

of

U558

for

mlnlmum

amplltude.

C.:SOUND

SECTION

The

6 MHz

sound

sectlon

(see

Flg. 3)

P'rlI

out the

IF

cable

at

the bottom-left

on the chassls.

Apply

an unmodulated

6 MHz

slgnal

(approx.

10

mV)

to

polnt

1

of U554

(test

polnt

rrM29")

vla

a

2200

pF

capacltor.

Connect a

valve voltmeter

(pobttlon

3

V d. c.

posltlve)

to

junctlon

R975/C665

(test

polnt

"M5t').

Turn core

'h,

il'

of

U547 a

quarter

turn

antl-cloclsrdse

(the

meter

glves

a

readtng

of

approx. 1

V)

and adjust

?tf

,

g"

of

U547

for

ma:r. meter

deflectlon.

Subsegrently,

connect an

820

Q

reslstor between

polnt

3

of U557

and

chassls and adjust

rreff

of

U557 for

max.

defleetlon.

Remove

the reslstor from

polnt

3 and

connect

lt between

polnt

9

of

U55?

and

chassls and

adjutst

"c,d"

of

U557 for

max. deflectlon.

Remove

the reslstor and

adjustth,lt'of

U54l

to

a

deflectlon

of 0 V.

Subsequently,

apply a 30

7o

modulated AM

stgnal

and

adjust

rralrf

of

U547 for mlnlmum

ouptt voltage on test

polnt

rtM5rt,

to

be

measured

by

means

of

an

oscllloscope

or

mlllt-

voltmeter"

38,9MHz

36,8MHz

33.1MHz

25x

/'0,9

M

Hz

>500

x

38MHz

35MHz

33,1 MH

z

>

320x

\

38,9MH

z

t

?l),--13!,17MHz

4o,gMHz

-

-Y

10x

,500,

csz 706

8

Fig

.7

>70

x

n D.

seECIFIC SHRoMINANcE

ADJusTMENTs

(see

Fig.3)

1.

The

sub-osclllator

Apply

a colour

slgnal

and

adjust the

recelver

to

normal

setttng.

Connect

an

oscllloscope

to

polnt

9

of

U563

vla

an

attenua-

tor

probe (10

:1

)

.

Connect

junctton

5561

/Caaa

to

chassls

and

lntercon-

nect

the

collector

and

emltter

of

TM43.

Adjust

''ab"

of

U563

for

mlnlmum

amplttude

on the

oscll=

loscope.
Remove

the

oecllloscope

and

adjust

"ff '

of U563

so that

the

colirur

pattern

ls

practlcally

statlonary.

The

ldenttflcatlon

clrcult

Apply

a colour

slgnal

and set

all controls

of the

recelver

to thelr

normal

posltlons.

a. By

means

of

a

slngle-beam

oscllloscope:

Connect

an

oscllloscope

to

the

collector

of

TS434

(measurlng

polnt

M23)

and

adjust

5556 for

murlmum

amplltude

(about 20 V

p-p).

Remove

the

oscilloscope

b.

By

means

of

a

double-beam

oscllloscope:

Connect

the

"beam

A" lnput to

the

collector

of TS434

(measuring

polnt

M23)

and

the

"beam

Bf

'

lnput to

junctlon

C732/C?33.

Adjust

S556

so that

the

Ilne

pulse

colncldes

wlth

the

maxlmum

and the

mlnlmum

value

of the

ldentlflcatlon

slgnal

(see

Flg.9).

Remove

the

oscllloscoPe.

Fig

9

The

colour

AGC

-

Appty

a

colour

slgnat

and set

all

controls

of

the

recelver

to

thelr

normal

Posltlons.

-

Connect

a

valve

voltmeter

(1n;poslttron

10

V.:) to

jrrnctlon

RL029/R1031

(measurlng

polnt

M"25rr)

and

adjust

"h,1"

of

1J562

for

mlnlmum

meter

readlng

(about

5

V).

Remove

the

voltmeter.

4a. The

dela

Ilne TD570

(wlth

PM

5507)

Apply the

ralnbow

slgnal

from

the

PI\{5507 and

adjust

the

recelver

to

normal

settlng.

Connect

the

rrbeam

Bil

lnput of

a double

beam

oscllloscope

to

junctlon

Rll04/U575

(test

polnt

I'Ml9")

and

adjust the

horlzontal

tlme

base

so that

three

perlods

are

dlsplayed

(see

Flgs.lOa

and

10b).

F

ig.

10o

2,

F

is.11

F

i9.12

When Flg.

10b ls

obtalned,

adjust

R1103

so

that

Flg.

10a

arlses.

Subsequently,

connect

the

I'beam

Arf

lnput

to

the collector

of T5445

(test

polnt

'rM18)

and adjust the

horlzontal

ttme base so that

2]

perlods

arlse

(see

Flgs.11

and 12).

In

these figures

the

sectlons

lndlcated by

means

of the

clrcle are essenttal.

Dlsplay

one of these

sectlons

on the oscllloscope

by

settlng

the

horlzontal

amplltude

to

x5

(lf

necessary, use

Xshlft).

The oscllloscope

rnav

now show one of Flgs.

13.

3.

Fig.13o

Fig.13b

F

ig

.13c

Fig.

13d

-

If Flg.

13a

ls

dtsplayed

both for the

B-Y'

(Flg.

11) and

for the R-Yt

slgnal

(Flg.L2\,

the

amplltude

and

phase

of the

delay llne

are correct

and no

further

adjustment

ls necessary.

-

If Flg.

13b

ls only

obtalned

for

the

B-Yt slgnal, then

adjust

V572

so that

Flg.

13a 1s

obtalned.

-

If Flg.

13b

ls

obtalned

both for the

B-Y'

and

for the

R-Yt

slgnal,

then

flrst

adjust

the

core

(crosshead)

of

U569 so that

Flg.

13a

ls

obtalned

for

the R-Yt

slgnal

and adjustcUl72 so

that

thls

td

also

obtalned

for

the

B-Y I slgnal.

-

If

Flg.

13d

ls

obtatned,

flrst

adjust.R1060 so

that

Flg.

13b

ls

dlsplayed,

Rrrther

proceed

as descrlbed

ln

the

precedlng

sectlon.

-

If Flg.

13c ls

obtalned,

adjust

R1060

so that

Flg.

13a

ls dlsplayed.

Fig.13c

csz7069

Fig.10 b

4b.

The

PAL

dela IlneTDJ?q(wlth

PM5506

or

PM5508)

Set

the

generator

to

posltlon

"Delay".

Set

the

contrast

and

the

brlghtness

to thelr

normal

posltlons,

and

set

the

saturatlon control

to

3/4

of

tts

range.

-

If

the thlrd bar shows

the

I'Venetlan

bllnds?'

effect,

elemlnate

thts

wlth

R1060.

-

If the flrst

and

second

bars show the

"Venetlan

bllndrr

effect, ellmlnate thls

wlth

U569.

-

Set

the

generator

to

posltlon

f

'Colorlr

Barr'.

Il

the thlrd or the fifth bar.from

the

left

(cyan

and

magneta

respectlvely) shows

the

I'Venetlan

bllnds"

effect,

ellmlnate this

wlth

U572.

6a.

-

Set the

generator

to

posltlon

"Matrlxr'.

If

the

red bar shows the

"Venetlan

bllnds" effeet,

elimlnate

thls

wlth R1103.

Note: For

photographs

of the

I'Venetlan

bllnds"

effect

reference

ls

made to the

Dlrectlons

for

Use

of

the

colour

pattern generator (PM

5506

-

PM

5508).

5a.

The

sub-osclllator

phase

a

Check

adjustments

1,2 and 3.

Apply

the

ralnbow

slgnal from the

PM

5507

and

hrrn

contrast

and saturatlon to

ma>rlmum.

Connect

a

valve

voltmeter

(posltlon

30 V d. c.

,

posltive)

to

polnt

3

of U562.

Apply a dlrect

voltage of 5

V between

junctlon

R1029/

R1031

(test

polnt

ttM25")

and chassls

("-f'to

chassls).

Adjust

th,1"

and

rrvil

of

U562

accurately to

mzuctmum

meter

deflectlon.

Remove

the

dlrect voltage

and

the

valve

voltmeter.

Interconnect

polnts

4

and

5

(test

polnts

f

'M16"

and

f

rMlTrr

respectlvely)

of delay llne TD570.

Connect

the

Y

lnput of

an

oscllloscope

to

polnt

3 of 8405

and

the

X lnput to

polnt

3

of 840

3.

The

oscllloscope

now shows elllpses

accordlug

to one

of Ftgs

.L4.

6b.

Fig.14

o

Fig.1l,b

Fig

.11,c

hr

these

Flgs.

one

elllpse

ls lndlcated

wlth

an lnterrupted

llne

and

one

wlth

an unlterrupted

the.

Adjust the

vldeo

amplltude

of the

PM

5507

so that

approx.

2.5

V

ls

obtalned

ln

the

Y

dlrectlon.

-

If

Flg.

14b

ls obtalned,

adjust

ttvtt

of

u562

so that

the

two

elllpses

preclsely

coyer

each

other

as

shown

ln

Fig.

L4a.

-

ff

ftg.L4c

ls obtalned,

flrst

adjuet

traerf

of

U563

tuttll

the

two

elltpses

colnclde

(see

Flg.

14b)

and

then

adjust

f fv"

of

U562

untll

Flg.

14a [s obtalned.

5b. The sub-osclllator

and

the

burst-

hase dl scr

lm lnator

(wtth

PM

5506 or

PI\4

5508)

Set the

geDerator

to

posltlon

rrPhaseI

and

set all controls

of the receiver

to thelr normal

posltlons.

a. Adjust

I'aerr

of U563

unttl the lower

part

of

bars

1 and

2 ls

practlcally

equal

to the upper

part

of these bars.

b, Adjust

t'vrrof

U562

untll the Iower and the upper

part

of

the thhd bar

are

equal.

c.

Repeat the

adjustments

mentloned sub a) and b) until

the

Iower and

the upper

part

of

the

flrst,

the

second

and the thlrd bar are

equal.

The R-Y/B-Y

demodulator and

G-Y

matrlx

(wlth PM5507)

Check successtbely

the

above

adjustments 1,2,4a

and

5a then adjustments

5-6

and 11

under

the

headlng

trAdjustments

after

repalrsr'.

Apply

the

colour

bar

pattern

from the

PM5507

and

tune

the recelver carefully to the hlgher sldeband.

Turn contrast and

saturatlon to maxknum and

brlghtness

to

mlnlmum.

Set the hue control

to

lts

mld-posltlon and

the black-whtte/colour

swltch to

rtcolour".

Turn

the

vldeo control

of the

PM

5507 to maxlmum. Connect

an

oscllloscope to

polnt

12

of 8419

(B-Y

stgnal) and adjust

rrolr

of

U577

to

150

V,

@eak-to-peak

value). By means

of

the saturatlon control decrease

thls

value

to half

(75

V),

then by

adjusttng

"oil

of U577 lncrease lt agaln

to

150 V.

Next adjust, ln

turn, the contrast,brlghtness and

satu-

ratlon controls for a normal

plcture.

Wlth

the vertlcal

amplttude control

of the

oscllloscope adjust

the

peak-to-

peak

value of the slgnal to

4

blocks.

Measure

the

peak-

to-peak value of the voltage at

polnt

11

of

8419

on the

oscllloscope and note lt. Next adjust

the

amplitude control

of

the oscilloscope so that the

peak-to-peak

value of the

voltage

at

polnt

2

of 8419 corresponds to

the

value noted,

Connect

the oscllloscope to_polnt

3

of B4t9

(R-Y

slgnal)

and adjust

"o"

of U578 to

2{

blocks. Then connect

the

oscllloscope to

point

6 of 8419 and set

the

amplltude

control

of the

oscllloscope so

that tle

peak-to-peak

value

ls

the

same as

that

prevlously

noted.

Swltch

off the red and the blue

gun

(wlth

SKg and SK10

respectlvely) and

set the black-whtte/colour switch

to

rrblack-whlte".

Adjust

the brlghtness

control

untll the

green

bars are

just

vlsible,

then set the black-whlte/

colour swltch

to

rtcolourrr.

Adjust

R1125 so that

on

the

screen the 6th

green

bar from

the

rlght

(there

are 10 ln

total)

just

looses lts brlghtness.

Connect the oscllloscope

to

polnt

7

of 8419

(G-Y

sfgnal)

and adjust

R1126 so that

the

peak-to-peak

value ls

1.4

blocks.

The R-Y/B-Y demodulator

4nd

the c-Y matrtx

(wlth

PM

5506 or

PM

5508)

Thls adjustment

can

only be

reallsed

with the aid

of the

modlfled

I'Colour

Bar"

test

pattern;

in thls case

the

upper

part

of the

pattern

ls

made up

cf

colour

bars and

the lower

part

of

a white area.

If thts should not

be

the

case. flrst refer

to the converslon lnstructlons

Cd 583

for

generators

PM

5506

and PM

5508.

-

Check successlvely

the

above

adjustments 1,2,4b

and

5b, then adjustments

5-6

and 11 under

the

headlng

trAdjustments

after

repalrsrt.

-

Set

the

generator

to

posltlon

"Colour

Bar",

-

Adjust

the

contrast and

the saturatlon to maxlmum

and

the brlghtness to mlnlmum.

Set the hue control to mld-posltlon.

-

Cormect

an

oscllloscope to

polnt

12

of the

picture

tube

(B-Y

slgnal)

and

ailjust for

150

Vp-p

wlth

preset

I'orr

of U5?7,

-

Adjust the saturatlon

control untll the voltage

ls

reduced

to

100 Vp-p.

-

Adjust

tlreset"

"o"

of U577

agaln to

150

Vp-p remove

the oscllloscope.

-

Swltch off the

red and

green guns

with

SK9 and SK8

reepectlvely. Adjust

the brlghtnese, the

contrast and

the saturatlon

so that there

ts no dlfference ln bright-

ness between the

four blue bare,

and

the tlue

lower

part

of the screen.

-

Swltch on the red

gun

and

swltch off the

blue

gun.

If

requlred,

a,iLiuiit

ilrcset

"oi'of

IJ578

si;i;hat there

ls

no

dlfference ln b::1::ht;res:

l:etrvct-'rr the four red bars

and

the

red Irler

pirrl

ol. the scrceil.

-

S{.ttch on the

glr:en

grrn

ard sq'itch

rrlf

the

red

gun.

If

necessar]',

adjrisr

H1125

and Rli26

so

that there

ls no

dliference

in

brlghtness

between the four

green

bars

and

tht-;

icrwcr

grc*ln

part

cl the

screen.

-

Swltch

on

the

r-ed and thc

green gun

agaln.

-

Check adrrstment 5b.

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c 698
c

703

c708

C7L2
c 713
C7L6

c 718

C7L9

C72L

c735
c753

47

ttE

25

V

4,7

1tF

63

V

8pF

-

350

V

100

prF

16

V

120

pF

16

V

L20

pE

16

V

47

pP

25

V

47

pF

25

V

lpF

63V

15pF

63

V

47

1tF

25

V

27

pF

25

V

33pF

40V

82

1tF

25

V

47

1tF

25

V

47

1tF

25

V

250

ttF

25

V

1

t-rF

63

V

47

1.tF

25

V

500

pF

-

2,5

V

C755 4

ttF

-

400

V

C768 47

1tF'

25

V

C820

5

kpF

-

5000 V

C826 4,7

ltF

63 V

C833

33

pF

40

V

C851

33

prF

40

V

C852 16

pF

-

300

V

C859 20.000

pF

-

2,5

V

C860

1000

prF

16

V

C870 330

pF

16

V

C871

50

pF

30

V

C880 4700

1tF

4

V

C881

500

pF

-

2,5

V

C1431 1

pF

63 V

C1433 1

pF

63

V

CI435

47

pF

25

V

4822 L2L

20068

4822 LzL

20068

4822

r24

40087

4822 L24

40088

4822

I24

20433

4822

r24

20417

4822 L24

20035

4822

L24 20407

4822

L24 20384

4822 L24 20366

4822

L24

2037L

4822 L24

20347

4822'

L24

20066

4822

124

20385

4822 L24

20385

4822

r24

20385

4822

L24

2037L

4822

L24

2037L

4822

L24

20341

4822 L24

20357

4822 r24

20371,

4822

r24

20362

4822 L24

20366

4822

L24

20379

4822

L24

2037I

4822

L24

2037L

4822

L24

20399

4822

L24

2034t

4822

L24 2037L

4822

L24

20024

4822 L24 20035
4822

L24

2037L

4822

r24

20067

4822

124 20347

4822 L24 2036.6
4822 L24

20366

4822 L24

20433

4822

L24

40097

4822

L24

204L7

4822

L24

20403

4822

L24

4009L

4822

r24

20428

4822

L24

20408

4822

L24

2034L

4822

L24

2034L

4822

I24

2037L

Table

protector

Cam

securlng

the

chassls

Hinge

of chassls

Cam securlng

the rear

panel

Push-button

of m.alns

swltch

Dlal

wlndow

of

push-button

unlt

Clamplng

spring

of

p.

c.

board

of channel

selector

Mountlng

plate

of control

panel

Splndle

of

potentlometers

(volume,

etc

"

)

Matrs

swltch

SKL

Knob,

volume

,

tone , etc

.

Push-button

unlt

Ut4

P.

C.

board

of band

switch

UL4

Potentlometer

strlp

UL4

Contact

holder

of band-swltch

TJL

Rear

panel

Long spihdle

of convergence

lalobs

Strort

splndle

of convergence

lcrobs

Convergence

lmob,

small

dlameter

Convergence

box

Slltch

SK8-9-10

I{nob

92

(flne-trurlng)

Switch

SK3-SK11

Knob

of SK3-SK11

Caslng

of deflectlon

coll

Buffer

rlng

of

deflectlon

coll

Purlty

rlngs

Sprlng

securlng

the

purlty

rlngs

Red

plug

on convergence

r.rnlt

Green

plug

on

convergence

unlt

BIue

plug

on convergence

unlt

Coaxial

plug

M

Coaxial

coupllng

socket

M

Plugs

A-B-C-D-X-Y

Plugs

H-L

Plugs

Zq

Plugs

E

-

F

Holder

of safety

fuse

I{rrob,

,

focuslng

Plug

holder

F

Valve

holder, 10

plns, pertlnax

Valve holder,

9

plns,

ceramlc

Valve

holder

,

I

plns,

pertlnax

Valve

holder, PL

508

Valve

holder

of

ptcfure

hrbe

Valve holder PL504

-

PL509

-

PY500-PD500

Valv6 holder

GY501

Fllament

wlndlng

GY

501

Focus

cable

HT-cable,with

cap

Ring round

HT-cable

Top connectlon

PD

500

Safety

swltch

of HT-cage

Channel

selector

VIIF

-

U1416

Channel

selector

UHF

-

U1412

Aerlal

caslng,

complete

4822

462 70698

4822

404 30051

4822

404 30052

4822

404 30053

4822 410

21068

4822 459

20L28

4822

492

61398

4822

459

602LL

4822

535 70345

4822

276 L0372

4822

4L3

30446

4822

2L0

40LLL

4822

466 10184

4822 101

90043

4822

290

80186

4822

432 10081

4822

535

90678

4822

535

90667

4822

4L3

30448

4822

691 10113

4822

273 30t79

4822

4L3

30*47

4822

276 10383

4822

410

21003

4822

691 10068

4822

532 60438

4822

532

507L2

4822

492

6L342

4822

266

40029

4822

266 40031

4822

266

40032

4822

264

10036

4822

267 10036

4822

266

30055

4822

266

20045

4822

266

30054

4822

264

5005L

4822

492

60063

4822

413 40396

4822

255

70L47

4822

255

7007L

4822

255

70L39

4822

255

70L0L

4822

255

70097

4822

255

70L42

4822

255 70044

4822

255

70L4L

4822

320

20043

4822

320

2004,5

4822 320

20035

4822

532 60307

4822

256

90066

4822

276

L0302

4822

2L0

40L04

4822

2L0

50064

4822

691 10143

'ERVICE

NNATIO//I

15-4- 1

9?

1

K?0

CTV

setg Bk 41

a.

S22K4e2/L6/56

-

S26K497

/L5/55.

Modified:

Channel

selector U1417

-

UHF

-

4822

210 50064.

New version

with built-in

n+{

-filter

4822 zLB 20057.

b.

General.

Modified

line

outprt stage, see Fig. 1.

8411

(PL504)

has been replaced by PL509.

R1181

(2?

kA) hae

been

replaced by a resistor

of

47 kO.

Added:

Rl180

(220

k0

-

L/8 W)

between

38408 and 88{08.

No

longer

uged:

R893.

R899

(18

kO) has

been

replaced by a resistor

of

1.8 kO.

In

the

filament circuit, Bl10

has been

fitted in

the

place

of B{11, and

vice

veroa.

RIl99

(1

Q),has been replaced bv

a reeistor

of

0.51 f2-

4822lfg 60088.

Added:

D503

-

D 504,

BYL27,

between 98410

ard 18410.

erd between

98411

end 18411

Reagon: Reduction

of

diesipation

of

8410

end

protectlon

of PL509.

c.

General.

Modifted:

Controls on

gZ

panel.

Control

92

fine tuniry

wae 4822 413

3044?;

hes become

4822 413

3043?.

d. General.

Modtfted:

Blue and

Green

AdJuetment.

Added

:

R1312

-

8.2 kQ

-

L/4 W

betweenpoint

2

of

the

picturetube

and

Junctlon

R1215

-

Vl.

e. General.

Modlfied:

R1209 hae

beer.

replaced

by

aafety regletor

-

22 kf| - 4822 LLL

Reason

:

Protection

agair. t

picture

tube

flashover.

f.

General.

Modtfted: R906

(470 0)

has

been replaced by a

resistor

of

680

0.

Reaeon : Improvement

of stabllisatlon.

g.

Generel.

Modtftcatlon

brightneeB

control, 8ee Fig.

2"

Modtfied

: OF

161

(cR4?3)

hee been replaced, by

AAZ

17.

R971

(390

kQ)

has been replaced by a

reglgtor of 4?0 k0.

The

supply

voltage

on R9?1

was

+?.

and has becmre

'+3.

Added: R1108

-

1kA.

R1109

-

68

Sl

and

R1110 - 2.2k92.

'Reason:De*eageYrt",frT,il,tffi

niltfi

:t:$:il1""J""f,T?;;t:?"k,a*ons.

r

Pdattd

ia

rhc

Nrrh{mdr

Copyrrght

ror.rv.d.

Confidrntiel

informrtion for

scrvicG"$tehrc

CSZgg?S

BK

L1

B/.1

0

8Y127

R

1197

R

1199

-21

a

I

Fig

1

F5

c663

A

1c662

R969

R

961

+3

R

967

R

971

+25

R

1110

+ZS

Rrlog

c3

Rl3Bo

PL 509

p1509

R1202

.Y

\

hf

o

-y

o

t\

{

c9299??

R1109

Fi

9.2

B3

13A