Philips CM11342, CM11362 Service Manual

)

Service

Manual

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Commodore

MONITOR

l084S-Pl

Hersteller

PHILIPS

Typ

8833

Geratebezeichnung

COLOR-MONITOR

Geratebeschreibung Best. I Art.-Nr.

Baujahr I Katalog

Ersatzteilversorgung Baugleich

Lagerort lnteme Daten

PHIL

3573

14" CGA

COLOUR

MONITOR

CM11342

/ooG/OSG/10G

/20Gf

7SG

~®NO©® ~®NO©®

Service

•

CM11362/oorrosrr1or

rYICe anua

The eM11342

is a 14" eGA colour

monitor which

suitable tor con

nection

to a vi

deo

game

comp

uter.

home

com

puter,

tune

r, etc.

The

monitor

fitted

with the

following input

RGe·tine

ar,

RGe

·ttl.

eves

(PAL), AUDIO

·R a

AUDIO-L. The eM11362

is the

same

the

eM11342,

except

without the

eves

and

AUDIO-A inputs

Le eM11342

est

moniteu

r cou

leur eGA 14"

con~u

pou

r e1re

connec

1e a un o

rainate

pour jeux video

, a un

ordinateur

domestiqu

e, a un

syntoniseur TV,

etc.

monl

teur est

munl des

entrees

sulvan

tes :

RVe·llneaire,

RVB

-ttl,

eveS

(PAL), AUDIO·R

(drolte)

DIO

-L

(gauche).

Le eM11

362

est

semblab

eM11342,

mais

comporte

pas

tes

entrees eves et

AU DIO·

De eM I

1342

een

14" eGA kleurenmonitor

ges<

hikt

aan te

sluilen op een

videospelcompu

ter, home

compute

r, TV·

tune

r enz.

De monitor is

voorzien van

do vol

g'\lnde

inganger:

RGe

-tl

nealr, RGB·Ill.

eves

(PAL),

AUDIO·R,

AUOJO·L.

eM1

1362

geti

aan

CM11

342, achier zondor

ngangen

eves

AUDIO·R.

r e

M11342

ist

ein 14"-

eGA·Fa

rbmonitor, dar f(r den

Anschtua

Videosp

iet

computer. Homecomputer

TV·Tunor

usw.

geeigne

t i

st.

Der Monit

1st

mit r

otgenden Elngangen ausgesh ttet:

RGe-Jinear,

RGe-tt

eves

(PAL

AUDIO-A

. AUDO·L.

Der eM11

362

ist

baugte

ich mit

dam

eM11342,

ve-

fug t

edoch

nic

ht uber

die eves. und

AUDIO·

R·Eing~tge

eM1

1342 e un

monitor

a cotori

CGA

de 14"

previs

per essere

cottegato

un teleg

toco.

home

compute

slntonlzzatore

TV,

ecc

monitor e

equlpaggiato del

seguenti Ingress!:

RGe-

llneare,

RGe·ttl,

eves

(PAL),

AUD

IO·R,

AUDIO-L.

CMI

1362

equ

lva

le at eM I 1342 ad

eccezlone

deg

ingress!

eves

e AUDI

O-A

@TECHNICAL

DATA

General

mains voltage

220-240 v (1

0%)

mains frequency

power consumption

75W

Picturetube

size

14"

deflection angle

goo

- EHT 25KV

slot triplet pitch 0.42 mm

- type

M34EAQ10X

Video

vertical frequency

Hz (47-62,5 Hz)

horizontal frequency 15625 Hz

(+600Hz)

bandwidth 6.5 MHz

characters 2000

Audio

loudspeaker 16Qj1 W/3"

- output power

([)

CARACTERISTIOUES TECHNIQUES

Generalites

- tension de service

- frequence du reseau

- consommation

Tube

image

- taille

- angle

deviation

haute tension

pas d'intervalle triplet

type

Video

frequence trame

frequence ligne

largeur

de bande

caracteres

Audio

haut-parleur

puissance de sortie

393

220-240 v (1

0%)

75W

14"

goo

0,42

M34EAQ10X

Hz (47-62,5 Hz)

15625 Hz

(+600Hz)

6.5 MHz 2000

16Q/1 W/3" 1W

DATI TECNICI

General it

- Tensione di servizio

- Frequenza di rete

- Consume

Cinescopio

- Dimensioni

- Angolo di deviazione

- Alta tensione

- Slot triplet pitch

- Tipo

Video

- Frequenza verticale

- Frequenza orizzontale

- Larghezza della banda

- Caratteri

Audio

- Altoparlante

- Potenza di uscita

@ TECHNISCHE GEGEVENS

Algemeen

bedrijfsspanning

netfrequentie

verbruik

Beeldbuis

afmeting

afbuighoek

hoogspanning

slot triplet pitch

type

Video

vertikale frequentie

- horizontale frequentie

bandbreedte

- caracters

Audio

luidspreker

uitgangsververmogen

TECHNISCHE DATEN

Allgemeines:

Betriebsspannung

Netzfrequenz

Leistungsaufnahme

Bildrohre

Gr613e

Ablenkwinkel

Hochspannung

Schlitz-

Triplett-Abstand

Typ

Video

Bildfrequenz

Zeilenfrequenz

Bandbreite

Zeichen

Audio

Lautsprecher

Ausgangsleistung

220-240

v ( 1 0%)

75W

14"

goo

KV 0,42 mm M34EAQ10X

50 Hz (47-62,5 Hz)

15.625 Hz

(+600Hz)

6.5 MHz 2000

16 Q/1 W/3" 1W

220-240V

0%) 50Hz 75W

14"

goo

0.42 mm M34EAQ10X

50 Hz (47-62,5 Hz) 15625 Hz (

+600

Hz)

6.5 MHz 2000

16Qj1 W/3" 1W

220-240 v (1

0%)

75W

14"

goo

0,42

M34EAQ10X

50 Hz (47-62,5 Hz)

15.625 Hz (

+600 Hzl

6.5 MHz

2.000

16Qj1 W/3" 1W

,.......

1 . Headphones connection

"GREEN" switch

Mains voltage connector

RGB ANALOG{TTL switch

"D"

SHELL connector

RGB/CVBS, LCA switch

Luminance{CVBS input

10.

AUDIO-L input

11.

AUDIO-A input

1 . Presa per cuffia

lnterruttore "VERDE"

Presa per cordone

rete

BU-3

"D"-SHELL CONNECTOR

SIGNAL (CGA)

.j.

2 N C

RED GREEN BLUE INTENSITY COMP SYNC HOR SYNC VER

SYNC

02 03

06 07

08 09

SENSITIVITY

}

Unea~-

TTL 0-0,BV

H-

2,4-SV

TTL

LEVEL

0,3-0,SV

}

TTL LEVEL SAME POLARITY

CM11342

,....... ,.......

,.......

I I I

1 . Hootdtelefoonaansluiting

"GROEN" schakelaar

Netspanningsbus

RGB ANALOOG{TTL

Schakelaar

"D"-SHELL Aansluitbus

RGB{CVBS,LCA Schakelaar

Luminantie{CVBS lngang

10.

AUDIO-L

lngang

11.

AUDIO-A

lngang

Commutatore RGB ANALOGICO{TTL

Presa

"D"-SHELL

"'---

'---

1 . Branchement casque

lnterrupteur "VERT"

Boite de tension du secteur

lnterrupteur RVB ANALOGIQUE{TTL

Boite de raccordement COQUILLE "D"

lnterrupteur RGB (RVB)/CVBS, LCA (Luminance, chroma, son)

Entree luminance{CVBS

10. Entree

AUDIO GAUCHE (L)

11. Entree

AUDIO DROIT

(R)

Commutatore RGB{CVBS, LCA

lngresso luminanza{CVBS

,L,......J'

s 6

G.__

1\~

r--

MOA,J2714

T02/9024

1 . Kopfhiireranschlufl

"GRUN"-Schalter

Netzspannungsbuchse

RGB-ANALOG{TTL-Schalter

"D"-Anschluflbuchse

RGB/FBAS-,

LCA-Schalter

Luminanz/FBAS-Eingang

10.

AUDIO-L-Eingang

11.

AUDIO-R-Eingang

10. lngresso AUDIO - S

11. lngresso AUDIO - D

INPUT

AND

OUTPUT

SOCKETS

IMPEDANCE

?So ?So ?So

75n

?So

BU2 BU4 BUS

BUt§)

SIGNAL

LUMINANCE/CVBS AUDIO-R AUDIO-L

@U4

@)us

SENSITIVITY

IMPEDANCE

1Vpp

?So

177mV rms 10ko

BU6

c==:~

SIGNAL SENSITIVITY

.,[,.

2 LEFT CHANNEL

21Vrms

3 RIGHT CHANNEL

21V

rms

IMPEDANCE

32o 32o

MDA 02713

T02{9024

,...,

I I

1 . Headphones connection

"GREEN" switch

Mains voltage connector

RGB ANALOG/TTL switch

"D"

SHELL connector

10.

AUDIO-L

input

1. Presa per cuffia

lnterruttore "VERDE"

Presa per cordone di rete

BU-3

"D"-SHELL CONNECTOR

SIGNAL (CGA)

.j.

2 N C

RED GREEN BLUE INTENSITY COMP SYNC HOR SYNC VER.SYNC

02 03 04

08 09

SENSITIVITY

}

LmeaLr

_ 0 7V

TTL

0-0,BV

H-

2,4-SV

TTL LEVEL

0,3-0,SV

}

TTL LEVEL

SAME POLARITY

CM11362

'-./

I I

CJJ

1---'

1L_J

,......

_,...,

I I I

1 . Hoofdteletoonaansluiting

"GROEN" schakelaar

3. Netspanningsbus

RGB ANALOOG{TTL Schakelaar

"D"-SHELL

Aansluitbus

10.

AUDIO-L

lngang

Commutatore RGB ANALOGICO{TTL

Presa

"D"-SHELL

'---

Branchement casque

lnterrupteur "VERT"

Boite de tension du secteur

lnterrupteur RVB ANALOGIQUE/TTL

Boite de raccordement COQUILLE

"D"

10. Entree AUDIO GAUCHE (L)

10. lngresso

AUDIO - S

INPUT

AND

OUTPUT

SOCKETS

IMPEDANCE

·?So ?So ?So ?So

?So

BUS

SIGNAL

SENSITIVITY

IMPEDANCE

AUDIO

177mV nms

10ko

1 2 3

r--

MDA02712

T02;9024

Kopfhiireranschlufl

"GRUN"-Schalter

Netzspannungsbuchse

RGB-ANALOG{ITL-Schalter

"D"-Anschluflbuchse

10.

AUDIO-L-Eingang

BU6

c==:~

SIGNAL SENSITIVITY

IMPEDANCE

.).

AUDIO

21V

rms

32o

MOA02711

T02/9024

CS30

394

@Differences

between CM11342

and

CM11362

® Verschillen CM11342 t.o.v. CM11362

Differences

CM11342

par

rapport

au CM11362

® Unterschiede zwischen den

Modellen

CM11342

und CM11362

Differenze

trail

CM11342 e CM11362

PART

CM11342 CM11362

ITEM

DESCRIPTION CABINET PARTS 100

101 105 106

BACKCOVER FRONT SUPPORT

LID MAIN CHASSIS 316

314 1627 2289

2290 2303 2601 2602

2603 2604 2605 2606 2607

2608 2609 2610 2611 2612

2613 2614 2616 2617 2618

2651 3288

3289 3295 3298 3303

RCA JACK

SWITCH

CRYSTAL

CAPACITOR

RESISTOR RESISTOR RESISTOR RESISTOR RESISTOR

X X

X X X

X X

X X X

X X

X X X

- 2)

Continued

PART ITEM DESCRIPTION

MIAN CHASSIS 3337 RESISTOR

3601

RESISTOR 3605 RESISTOR 3606 RESISTOR 3607 RESISTOR

3608 RESISTOR 3609 RESISTOR 3612 RESISTOR 3614 RESISTOR 3615 RESISTOR

3616 RESISTOR 3617 RESISTOR 3618 RESISTOR 3619 RESISTOR 3621

RESISTOR 3622 RESISTOR

3649 RESISTOR 3651

RESISTOR 3652 RESISTOR 3653 RESISTOR 3654 RESISTOR 3668 RESISTOR

5301

COIL 5605 COIL 5606 COIL 5608 COIL 5631

COIL 5632 COIL

5637 COIL 7290 I.C.

7610 I.C. 8360

LEAD WIRE

9306 BRIDGE WIRE 931

0 BRIDGE WIRE 9315 BRIDGE WIRE 9318 BRIDGE WIRE 9319 BRIDGE WIRE 9357 BRIDGE WIRE 9360 BRIDGE WIRE 9369 BRIDGE WIRE

HEADPHONE PANEL 3296 RESISTOR 5290 LOUDSPEAKER

PART

CIRCUIT DIAGRAM WITHOUT CVBS INPUT FUNCTION (CM11362)

30 395

A17

A18

CM11342 CM11362

X X X

X X

X X X X X

X X X X

X X

X X X

X X

- 2)

A18

® Explanation

the

symbols:

PRESENT

- NOT PRESENT

OTHER VERSION

ADJUSTING ELEMENT

Note: All parts are indicated in the circuit diagram, in the

PCB

layout of the MAIN CHASSIS and in the parts lists

elsewhere in this documentation. The table shows which

parts must be removed for the CM11342 and CM11362. @Verklaring

van

tekens:

AANWEZIG

- NIET AANWEZIG

ANDERE UITVOERING

INSTEL ORGAAN

Opmerking: In

het principe schema, in de print lay-out van het MAIN

CHASSIS

en in de stuklijsten elders in deze

documentatie, zijn aile anderdelen aangegeven.

de tabel wordt aangegeven welke onderdelen voor CM11342

CM11362 moeten worden afgevoerd.

Explication

des

symboles:

PRESENT

- ABSENT

AUTRE EXECUTION

REGLAGE

Remarque: Toutes les pieces de rechange figurent sur le schema de montage,

sur

le trace imprime du CHASSIS PRINCIPAL

sur

nomenclature des pieces ailleurs dans cette

documentation.

tableau indique les pieces a

considerer

pour

CM11342 ou pour le CM11362.

3648

·12

A10 A3

+12

Zeichenerklarung:

X VORHANDEN

NIGHT VORHANDEN

ANDERE AUSF0HRUNG

EINSTELLREGLER

Anmerkung: lm Blockschaltbild, im Platinen-Layout des MAIN CHASSIS

und in den StOcklisten sind samtliche Bauteile

aufgefUhrt. In

der

Tabelle

ist

angegeben, welche Bauteile fur den CM 11342 oder CM 11362 von der Liste zu streichen sind.

SPIEGAZIONE DEl SEGNI:

X PRESENTE

- NON PRESENTE

TRA VERSIONE

ORGANO REGOLABILE

Nota: Nello schema di principio, nel lay-out del circuito stampato del TELAIO PRINCIPALE e negli elenchi dei

particolari

piu avanti nella presente documentazione,

sono indicati tutti i particolari. Nella tabella

e indicato

quali particolari per

CM11342 o CM11362 devono

essere cancellati.

·12

6662 6F"l

1N4148

ESV

00298

T06-9025

@CAUTION

Safety requirements stipulate that, during repair, the set should be restored

its original state and

that

parts indentical

the specified ones, should be

applied.

For safety reasons, the parts indicated with the sign

A should be replaced by identical parts (for code

numbers see electrical parts

lists).

To avoid damage to ICs and transistors, flash-over

the high-tension should be avoided.

Be careful when performing measurements in the high-tension section and on the picture tube.

Never change parts when the set is still switched on.

Safety goggles must be worn during replacement

the picture tube.

ELECTRICAL ADJUSTMENTS

ADJUSTMENTS

THE CHASSIS

1.1

+128V supply voltage (3414)

- Apply video signal to the monitor.

Set volume control 3295, brightness control 3662 and contrast control 3658

minimum.

Set trimming potentiometer 3414

mid-position.

(This is a presetting).

- Connect

voltmeter

junction

resistor 3520 and

diode 6453.

- Switch on monitor.

- With trimming potentiometer 3414 set the

voltage

at junction 3524/6453 to

128V.

1.2 Horizontal synchronization (3257)

- Apply video signal

(cross-hatch

pattern) to the monitor.

- Short capacitor

2270. (This capacitor is connected

pin 5

7270.)

- With trimming potentiometer 3257, adjust the picture so that it

straight.

- Remove the

short-circuit

on 2270.

1.3 Picture position

General: For the following adjustments apply a video

signal

(cross-hatch

pattern) to the monitor.

1.3.1

East-west

correction (3537)

- With potentiometer 3537, make the vertical lines on the left and

right-hand

side

the screen as straight

as possible.

1.3.2 Picture width (3534)

- With potentiometer 3534, set the picture width

for

blocks to

260 mm.

1.3.3 Horizontal picture centering (3264)

- With potentiometer 3264, set the correct horizontal centering.

1.3.4

Vertical picture centering (3583)

- With potentiometer 3583, set the correct vertical

picture centering.

1.3.5 Picture height

(3550)

- With potentiometer 3550, set the picture height

for

1 0

blocks to 186 mm.

1.3.6.

Vertical linearity (3573)

- Adjust the correct vertical linearity with

Pre-set

potentiometer 3573. If necessary repeat 1.3.5 and

1.3.6.

1.4

Setting

of:

• VG2 (bottom knob on the line output transformer)

•

cut-off

points

the picture tube

(31

07, 3117 and 3127)

• white

"D"

(3671, 3680)

Set

the brightness

1/4

its range and set the contrast to minimum. Set the potentiometers

3107,3117,3127,3671

and

3680

mechanical

mid-position.

Set VG2 potentiometer

minimum.

Set the signal generator

"pur" position and

introduce the respective colours red, green and blue.

- Using potentiometers

3107, 3117 and 3127 with the corresponding colour pattern, set the voltage on the picture tube pins

6 and

to 1 OOV.

- Apply a white frame and adjust the VG2 potentiometer so

that

any colour among red, green

blue

becomes

visible.

Set the pattern generator

purity with

the

colour that

was

first visible.

- Reset

VG2 potentiometer

just

visible light.

- Adjust the

two

remaining colours with

their

corresponding purity colour

the same light

output

using potentiometers

07, 3117

3127.

- Return the signal generator

white

frame

and adjust

the potentiometers

3107,3117

and 3127

that

optimum background colour is obtained.

- Using potentiometers 3671 and

3680 (with white

frame) adjust the background colour

that

at minimum brightness and maximum brightness the background colour is the same.

1.5 Focusing (top knob

line output transformer)

- Apply white pattern to monitor.

- Adjust focusing so that the picture

2/3

the

diagonal lines (counting from center

four

corners)

the displayed screen is as sharp as

possible.

1.6 Subcarrier oscillator (2613)

- Apply colour bar pattern

monitor.

- Connect

470Q resistor between point

761

and earth.

- Adjust 2613 so that the colour picture

the screen is

stationary.

- Remove the

470Q resistor.

1.7 PAL delay line (3619, 5632)

Apply

OEM pattern from a pattern

generator

the monitor. Set brightness control 3662,

contrast

control

3658 and

colour

saturation control 3654 to

3/4

the

range.

Adjust 3619

that the "venetian blinds"

the

third

bar

disappear.

Then adjust 5632 until the

"venetian

binds"

the first

and fourth

bar

disappear.

Readjust 3619 as described above.

1.8 Chrominance suppression

(5605)

- Apply colour bar pattern to the monitor.

- Connect oscilloscope

pin 15

IC 7540.

- Set 5605

that the chrominance

sig~al

minimum.

(The chrominance signal

superimposed

on the

grey

steps

the luminance signal).

1.9 Audio balance (3298)

- Apply sinusoidal signal

177mVrms

tlz)

both

audio inputs LfR.

Set volume control

mid-position.

- Replace the

two

loudspeakers with a

160

resistor.

Set 3298 so

that

the

output

level on

b~th

16Q

resistors is the same.

396

PICTURE SETTINGS

Remarks:

The

following adjustments only apply to monitors

which are fitted with a replaceable deflection unit.

case

combi tube replacement, no picture settings are required because it has been done by factory already

- The colour purity and convergence adjustments described hereafter need only to

carried out if a

completely new setting is required or if a new picture

tube has been fitted.

other cases,

for

example after

replacing the deflection unit, it

will not usually be

necessary to remove the rubber wedges

figure

3).

Corrections by means

the

multi-pole

unit will

then suffice.

- Focusing adjustment described

item 1

must be

done

prior

to picture settings.

2.1

Colour purity, see figure 3

- Unscrew the fixing screw

"F"

on the deflection unit. Move the deflection unit and remove the three rubber wedges

"G". Move the deflection unit forward as far as possible against

the

glass of the picture tube cone and tighten

fixing

screw

"F"

so that the deflection unit can only

be shifted slightly. Place the

multi-pole

unit

the position drawn: tighten

screw

"A" and turn locking ring "B" anticlockwise.

Position

the

monitor to face east or west and switch it

on. Apply a

cross-hatch

pattern and set the

brightness control to maximum.

Allow the monitor to

warm up

for

ten minutes.

Adjust the static convergence using tags

"C" and

"D"

(if necessary, refer to point 2.2.).

Turn 3583 for the vertical centering to its

mid-position.

Switch off the green and blue guns

by disconnecting resistors 3122 and 3112. By

turning the colour purity rings with the

"E"

tags, the

vertical

red

bar is brought as close as possible to the

center

the

screen, while the central horizontal line should be as straight as possible. Apply a

white

pattern signal and check that the red

bar is in

fact

in the center

the screen. If not, switch

the

cross-hatch

pattern again and move the red

bar

the right direction, ensuring that the picture

does

not

move

too much

the vertical direction. Apply the white pattern signal and move the deflection unit until

the

whole picture surface is uniformly red.

Switch

the green and blue guns. There may be no

colour

patches

in the white picture now obtained. If there are, a minor correction can be made by turning the

colour

purity rings

"E"

slightly and{or moving the

deflection unit slightly.

Tighten

screw

"F" securely.

Adjust

the

vertical centering with 3583.

Proceed

the static and then the dynamic

convergence setting.

2.2 Static

convergence,

see figure 3

- Apply a

cross-hatch

pattern and allow the monitor to

warm up

for

ten minutes.

- Switch

off

the green gun by disconnecting resistor

3122 and

turn

locking ring "B" anticlockwise.

- By

turning

the

four-pole

rings with the "C" tags the

red and

blue

cross-hatch

patterns are placed on top

of each

other

in the center of the screen.

- Switch

the green gun by connecting resistor 3122

back

its

orginal position and switch

off

the blue gun

disconnecting

3112.

- By

turning

the

six-pole

rings with the "D" tags the red

and

green

patterns are placed on top

each other

the

center

the screen.

- Switch

the blue gun by connecting resistor 3112

back

its

orginal position and tighten ring "B".

397

2.3 Dynamic

convergence

Remark:

The dynamic convergence is achieved by tilting the deflection unit

vertically and horizontally.

order

fix the deflection unit in the right position, three rubber wedges are fitted between the glass

the picture tube

cone and the deflection unit, as shown

fig. 4d

5d.

Two

wedge thicknesses are available, one 7 mm thick,

code number 4822 462 40356 and the other

mm thick,

code number 4822 462 40357.

- First check the colour purity and the static convergence.

- Apply a

cross-hatch

pattern and switch

off

the green

gun by disconnecting resistor 3122.

- Eliminate the crossing

the central horizontal blue

and red line and the crossing

the central vertical

blue and red line by

vertically tilting the deflection unit.

If the deflection unit is

the correct position, then

place rubber wedge

(D,

without removing the paper

strip, at the

top

(figure 4a)

at the bottom (figure

5a). Figure 4a applies when the unit is tilted upwards and figure 5a applies when the unit is tilted downwards.

- Through the horizontal tilting

the deflection unit,

both the horizontal blue and red lines in the upper

and lower halves

the picture and the vertical blue and

red lines on the left and

right-hand

side

the picture

are placed on

top

each other. If the deflection unit is in the correct position, then place the wedges

® and @ , remove the paper

strips and firmly press the adhesive side

these

wedges against the glass

the picture tube as

shown

figure 4b

5b.

Now place wedge

@ as shown in figure 4c

or 5c,remove the paper strip and firmly press the adhesive side of this wedge against the glass

the picture tube cone. Remove wedge

so that the situation according to

figure 4d or 5d arises.

- Switch on the green gun by connecting resistor 3122 back to its original position.

@ WAARSCHUWINGEN

Veiligheidsbepalingen vereisen, dat het apparaat bij reparaties

zijn oorspronkelijke toestand

wordt

teruggebracht

dat onderdelen, identiek aan de

gespecifeerde worden toegepast.

Onderdelen voorzien van het teken A dienen om veiligheidsredenen vervangen te worden

door identieke onderdelen. (Voor kodenummers zie elektrische stuklijsten).

beschadigingen van IC's en transistoren te

voorkomen moet iedere

overslag van de

hoogspanning worden vermeden.

Wees voorzichtig tijdens het meten

het hoog

spannings

gedeelte en aan de beeldbuis.

Verwissel nooit onderdelen terwijl het apparaat is

ingeschakeld.

Tijdens het vervangen van de beeldbuis

wordt

het

dragen van een

veiligheidsbril voorgeschreven.

ELECTRISCHE INSTELLINGEN

INSTELLINGEN

HET CHASSIS

1.1

+128 V voedingsspanning (3414)

- Videosignaal aan het apparaat toevoeren. Volumeregelaar 3295, helderheidsregelaar 3662 en contrastregelaar 3658 op minimum. Plaats instelpotentiometer 3414

middenpositie. (Dit

is een

voorinstelling)

Gelijkspanningsmeter aansluiten op knooppunt van

weerstand

3520

diode 6453.

Apparaat

inschakelen.

Met instelpotentiometer 3414 de gelijkspanning

knooppunt 3520/6453 instellen op 128

1.2 Horizontale synchronisatie

- Videosignaal (ruitpatroon) aan het apparaat toevoeren.

- Condensator

2270 kortsluiten. (Deze condensator is

op pin 5 van

IC7270 aangesloten.)

- Met instelpotentiometer 3257 het beeld zodanig instellen dat het rechtop staat.

- Verwijder de

kortsluiting over 2270.

1.3 Beeldpositie instellingen

Algemeen: Bij onderstaande instellingen een videosignaal

(ruitpatroon)

aan

het apparaat toevoeren.

1.3.1. Oost-west correctie (3534)

- Met potentiometer 3537 de verticale lijnen links en

rechts op het scherm zo recht

mogelijk maken.

1.3.2 Beeldbreedte (3534)

- Met potentiometer 3534 de beeldbreedte voor "14

blokken" instellen

260 mm.

1.3.3 Horizontale beeldcentreering (3264)

- Met potentiometer 3264

correcte horizontale

centrering instellen.

1.3.4 Verticale beeldcentrering (3583)

- Met potentiometer 3583 de optimale verticale

beeldcentrering instellen.

1.3.5 Beeldhoogte (3550)

- Met potentiometer 3550 de beeldhoogte voor

blokken" instellen

op 186 mm.

1.3.6 Vertical lineariteit (3573)

correcte verticale lineariteit instellen met

instelpotentiometer 3573 zonodig,

herhaal de

instellngen 1.3.5

1.3.6.

1.4 lnstellingen

van:

• VG2 (onderste knopje

de lijntrafo)

•

Afknijppunten van de beeldbuis (3107.3117

3127)

• Wit

"D"

(3671, 3680)

Stel

de helderheid

1/4

van zijn bereik en stel de

contrast

op minimum.

let

de potmeters

3107,3117,3127

3671

3680 op

mech. middenstand.

Regel VG2 potentiometer

minumum.

let

de signaal generator op stand "pur" en voer de

respectievelijke

kleuren rood -

groen

- blauw in.

Stel met behulp van de potmeters 3107, 3117

3127

met het bijbehorende

kleurpatroon,

spanning

beeldbuispinnen

8, 6 en

100

Voer

een wit raster toe,

regel de VG2

potentiometer zodanig op zodat een van

kleuren

rood, groen

blauw juist zichtbaar wordt.

Zet

de patroongenerator op purity

met

de kleur die

zonet

als eerste zichtbaar was.

VG2 potentiometer opnieuw instellen

net

zichtbaar

Iicht.

- De overgebleven 2 kleuren met hun bijbehorende purity

kleur bijregelen met de potmeters 3107, 3117

3127

dezelfde hoeveelheid Iicht opbrengst.

Zet

de signaal generator terug

wit

raster

regel

de potmeters 3107, 3117

3127 zodanig bij

dater

een optimale achtergrond kleur ontstaat.

Regel met behulp van potmeters 3671

3680 (met

wit

raster), de achtergrondkleur zodanig in dat bij

minimum

helderheid

maximum helderheid

achtergrondkleur hetzelfde is.

1.5 Focussering (bovenste knopje op lijntrafo)

- Witpatroon a

apparaat toevoeren.

- Focussering zodanig

instellen

dat

het beeld bij 2/3

van

diagonale lijnen (geteld vanaf het centrum naar

4 hoeken) van het weergegeven beeld

scherp

mogelijk is

1.6 Hulposcillator (2613)

- Kleurenbalkenpatroon

aan

apparaat

toe~oren.

- Weerstand van 4 70Q aansluiten tussen punt

van

IC761 0 en massa.

- 2613 zodanig

instellen dat het kleurenbeeld op het

scherm

stilstaat.

- Verwijder de weerstand van 470!1.

1.7 PAL-delay line (3619, 5632)

- OEM patroon van een patroongenerator a

het

apparaat toevoeren.

Zet

de helderheidsregelaar 3662,

contrastregelaar

3658 en de

kleurverzadigingsregelaar 3654 op 3/4

van

het bereik.

Regel 3619 zodanig af dat de "venetian

~li

nds"

3e balk verdwijnen.

Regel vervolgens 5632

todat de "venetian blinds" in

de 1 e en 4e

balk verdwijnen.

Regel 3619 opnieuw af zoals hierboven omschreven.

1.8 Chrominantieonderdrukking (5605)

- Kleurenbalkenpatroon

aan

apparaat

toe~oeren.

- Osciloscope aansluiten op pin 15 van IC7640.

- 5605 zodanig instellen dat het

chromina~ti

esignaal

minimaal

is. (Het chrominantiesignaal zit

gesuperponeerd

de grijstrappen van

~et

luminantie

signaal.

1.9 Audiobalans (3298)

- Sinussignaal van 177mVrms (1KHz)

toe~oeren

aan

beide audioingangen L/R.

Volume regelaar

de midden positie.

- Vervang de beide

luidsprekers

door

eenweerstand

van 16!1.

- 3298 zodanig instellen dat het

uitgangsnveau

beide

16Q

weerstanden gelijk is.

cs 30

398

+ 18 hidden pages

Philips CM11342, CM11362 Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual