Amstrad Pc14m28lr User manual

WA

eye

COVERS

PC-I4

DSM

PC14M28LR

PC14M39

v2

SVGA

MONITOR

SERVICE

MANUAL

Contents

b

Page

Technical

Specifications

Contents

.

Technical

Specifications

&

2

Power

Supply

=

220-240V

AC

48-63Hz

Safety

Test

Alignment

Instructions

.

3-7

Sync.

Input

Cabinet

Parts

List

8

TTL

Levels:

Electrical

Parts

List

9-10

Mode

H-Sync

V-Sync

H-Freg/kHz

=

V-Freq/Hz

Main

PCB

Component

Layout

1]

l

+

-

31.5

70

CRT

PCB

Component

Layout

12

Z

-

+

31.5

70

PSU

Schematic

Diagram

13

3

-

+

31.5

60

Main

Schematic

Diagram

1/3

I4

4

+

-

35.52

87

(1)

Main

Schematic

Diagram

2/3

&

Waveforms

15

2

+/-

35-38

55-60

Main

Schematic

Diagram

3/3

16

Signal

Cabic

15-Wav

Sub-Miniature

"D"

Tvpe

CRT

PC14M28LR

14"

0.28mm

Dot

Pitch

rsenah

ive

mblieataa

Mua

tODS

Anti-Glare.

Low

Radiation

.

te

a

ere

howd

LR

is

Low

Radiation

CRT

&

components

fitted

Information

published

was

latest

available

at

the

time

of

print.

Amstrad

reserves

the

night

to

supply

selective

components.

to

comply

to

MPR

II

standard.

PCI4M39

—-

14"

0.39mm

Dot

Pitch

Operating

Range

Temperature:

10-35°

C

Humidity:

20-85%

(non

condensing)

Weight

lt

Ske

Video

Input

RGB

Analogue

vidco

signal

0.71

V

Positive

User

Controls

Power

On

/

Off

Contrast

Brightness

Width

V-Centre

Height

(mode

5)

H-phase

(mode

4.5)

Display

Arca

245mm

wide

x

183mm

high

Dimensions

351mm

(W)

x

327mm

(H)

x

384mm

(D)

SAFETY

TEST

Please

note:

when

any

work

is

carried

out

on

a

set,

the

following

safety

tests

must

be

carried

out

to

ensure

continued

electrical

safety.

t)

Flash

Test:

Test

at

4kV

between

the

live

and

neutral

of

the

mains

lead

joined

together

and

ALL

accessible

metal

points

on

the

exterior

of

the

set.

2)

Insulation

Resistance

Test:

Test

between

the

live

and

neutral

of

the

mains

lead

joined

together

and

ALL

accessible

metal!

points

on

the

exterior

of

the

set

to

show

resistance

of

at

least

4M

ohm.

In

keeping

with

our

policy

of

continually

improving

our

service

and

the

technical

quality

of

our

products,

we

reserve

the

nght

to

change

component

type,

manufacturers,

sources

of

supply

or

technical

specifications

at

any

time.

Amstrad

Pile.

.

isa)

a

BRENTWOOD

HOUSE,

169

KINGS

ROAD.

BRENTWOOD

ESSEX

CM14

4EF

Note:

PC14M28LR

has

a

magnetic

cancellation

coil

fitted

around

the

deflection

yoke.

When

replacing

the

CRT,

remove

this

coil

and

refit

in

the

same

way

around

the

deflection

yoke

of

the

replacement

CRT.

The

monitor

incorporates

a

number

of

adjustments

which

are

listed

below,

and

will

have

been

correctly

aligned

before

leaving

the

factory.

Adjustments

should

only

be

carried

out

if

necessary

Alignments

Main

PCB

HT

Adjust

RV832

B+

Adjust

RV503

VGA

Frequency

RV429

30us

Monostable

RV406

1341s

Monostable

RV407

Keystone

RV491

East

/

West

Amplitude

RV450

H-Shift

SK403

V-Size

(Master)

RV422

V-Frequency

RV303

V-Linearity

RV316

Al

/

Screen

Voltage

FBT

Focus

FBT

Video

PCB

Red

Gain

RV219

Green

Gain

RV220

Blue

Gain

RV221

Red

Cut-Off

RV225

Green

Cut-Off

RV226

Blue

Cut-Off

RV227

All

test

patterns

refer

to

SVGA

test

Programme,

Issue

001,

used

in

conjunction

with

a

Trident

MVGA-T8900a

Video

Card.

HT

AND

B+

SETTING

N.B.

Number

in

square

brackets

refer

to

the

calculator

numeric

keypad.

Numbers

without

brackets

refer

to

the

typewnter

numeric

keys.

Select

MODE

3,

BLANK

RASTER.

"3,F9"

[1]

from

keyboard.

Select

CONTRAST

to

minimum

and

BRIGHTNESS

to

DETENT.

Check

the

voltage

at

C819

is

110v

+

0.5v.

Adjust

RV832,

if

necessary.

Check

the

voltage

at

C425

is

84V

+

0.5v.

Adjust

RV503,

if

necessary.

for

Y2

and

Y2V

chassis

VERTICAL

HOLD

Select

MODE

7,

50Hz

Sync

"7"

from

Keyboard.

Set

CONTRAST

to

mid

range

and

BRIGHTNESS

to

DETENT.

Turn

VR303

(vertical

hold)

fully

anti-clockwise.

Then

slowly

turn

RV303

clockwise

until

the

display

becomes

stable.

Stop

turning

RV303

immediately.

FOCUS

SETTING

Set

CONTRAST

to

mid

range

and

BRIGHTNESS

to

DETENT.

Set

Focus

Pattern

Green

"3,F6,

[5]"

from

keyboard.

Adjust

Focus

control

so

that

the

resolution

is

optimised.

HORIZONTAL

CENTRE

Select

MODE

3,

BLANK

RASTER

"3,F9,[1]"

from

keyboard.

Set

BRIGHTNESS

to

maximum

Check

for

a

centred

raster

within

+

2.0mm.

Adjust

the

position

of

jumper

SK403,

if

necessary.

HORIZONTAL

PHASE

(VGA)

Select

FOUR

BY

FOUR

GRID

"3,F3,[8]"

from

keyboard.

Set

contrast

to

mid-range

and

BRIGHTNESS

to

MAXIMUM.

Adjust

RV429

(H.

Freq.)

to

centre

display

image

within

the

display

consistent

with

a

voltage

of

4.0v

+

0.5v

on

IC404,

5.

VERTICAL

LINEARITY

Set

BRIGHTNESS

to

DETENT.

Select

Square

grid

"3,F8"

from

keyboard.

Adjust

RV3

16

(Vertical

Linearity)

for

best

linearity,

if

necessary.

Check

that

Vertical

Linearity

is

better

than

7%.

HORIZONTAL

WIDTH

Select

MODE

3,

WHITE

SCREEN,

NO

BORDER

"3,f9"

from

keyboard.

Set

Brightness

to

DETENT

and

Contrast

to

give

100

+

20

Cd/m~

Adjust

RV451

USER

WIDTH

and

check

that

a

width

of

245mm

is

available.

Set

RV451

to

DETENT.

VERTICAL

SIZE

Select

MODE

3

WITH

SCREEN,

NO

BORDER

"3,F9"

FROM

keyboard

Set

BRIGHTNESS

to

DETENT

and

contrast

to

give

100

+

20

Cd/

m2

Adjust

RV422

(480

size)

for

183mm

+

Imm

display

size.

Select

mode

2

with

screen

,

no

border

"2,F9"

from

keyboard.

Check

the

display

size

183mm

+

3mm.

Select

MODE

|

White

Screen,

No

Border

"1,F9"

from

keyboard.

Check

for

display

size

183mm

+

3mm.

Select

MODE

4

WHITE

SCREEN,

NO

BORDER

"4,f9"

From

Keyboard.

Adjust

RV433

USER

HORIZONTAL

PHASE

for

a

locked,

central

display.

Check

for

display

size

183mm

+

3mm.

Select

MODE

5

WHITE

SCREEN,

NO

BORDER

"5,F9"

from

keyboard.

Adjust

RV433

USER

HORIZONTAL

PHASE

for

a

locked

display

and

check

that

183mm

display

size

can

be

obtained

using

RV409

S¥GA

SIZE

USER

CONTROL.

Set

RV409

for

183mm

+

3mm

display

size.

VERTICAL

CENTRE

-

SET

CONTRAST

TO

MID

RANGE

and

BRIGHTNESS

to

DETENT.

Select

FOUR

BY

FOUR

GRID

"3,F3"

from

keyboard.

Adjust

RV313

(Vertical

Centre)

for

a

centred

display

within’

+

2.0mm.

GEOMETRIC

DISTORTION

Select

FOUR

BY

FOUR

GRID

"3,F3”

from

keyboard.

Check

the

total

distortion.

Adjust

RV450

E/W

Amp

for

straight

vertical

edges,

if

necessary.

Adjust

RV491

for

a

trapezoidal

display.

VIDEO

Cut-Off

Select

MODE

3

BLANK

SCREEN

"3,F10"

from

keyboard.

Set

BRIGHTNESS

TO

minimum.

|

Check

the

screen

emission

is

3

+

0.5

Cd/m2.

Adjust

A1

if

necessary.

Select

Mode

3

WHITE

BLOCK

"

3,F1,[*]"

from

the

keyboard.

Set

BRIGHTNESS

to

DETENT

and

CONTRAST

to

give

screen

emission

of

17

+

1

C

d/m2.

Using

the

cut-off

presets

adjust

as

required

to

obtain;

x

=

0.281

+

0.005

y

=

0.311

+

0.005

(Adjusting

a

minimum

number

of

the

presets

to

meet

the

required

limit).

Do

not

make

COARSE

adjustment.

VIDEO

GAIN

Select

MODE

3

GREEN

BLOCK

"3,F1,[8],[5]"

from

keyboard.

Set

BRIGHTNESS

to

DETENT

and

CONTRAST

to

MAXIMUM.

Set

GREEN

gain

RV220

for

a

screen

emission

of

76

+

|

Cd/m2.

Select

MODE

3

WHITE

BLOCK

"3,F1,[{8]"

from

keyboard.

Without

further

adjustment

to

RV220,

set

RED

and

BLUE

GAIN,

RV219,

RV221

to

obtain

a

white

balance

of

x

=

0.281

40.005

y=0.311

+

0.005

(Note

the

measurements)

Check

the

screen

emission

is

100

+

15/-10

Cd/m2.

If

not,

readjust

RV220.

Reduce

CONTRAST

to

give

a

screen

emission

of

17

+

I

Cd/m2.

Check

the

x

and

y

co-ordinates

are

within

+0.015

of

the

measurement

taken

in

Horizontal

Phase

(VGA)

(at

CONSTANT

maximum).

If

not

using

the

MINIMUM

of

the

adjustment,

carefully

re-adjust

the

appropriate

Cut-Off

preset

(RV225,

RV226,

RV227)

to

bring

the

colour

co-ordinates

just

within

the

limits

stated

below.

Verify

the

following

conditions.

Screen

brightness:

100

+

15/-

10

Cd/m2.

BRIGHTNESS

DETENT.

"3,F]"

CONTRAST

MAXIMUM.

Colour

Point

x

=

0.281+0.015

BRIGHTNESS

DETENT.

y=

03114+0.015

90

Cd/m*

WHITE

SCREEN

Colour

Tracking

x=

£0,015

CONTRAST

VARIABLES.

y=

+0.015

20

to

90

Cd/m?2.

Background

Brightness:

3

+0.5

Cd/m2.

BRIGHTNESS

MAXIMUM.

"3,F10"

CONTRAST

MINIMUM

WAWINIA

LSVYLNOO

sles

WAWIXWW

SSANLHOIUS

cWPISOFE

‘ssaulysug

PUNoIsyxeY

ZWyPD

06

2

07

C1007

=A

SHTEVIVA

LSWULNOD

S100

=%

BuyoRI

|

INO|O.)

N3SUIS

ALIHM

-4/PD

06

SIOOFTIEO

=A

“ELNSLAG

SSSANLHONIG

S100F

180

=%

WO

INO]O,)

WaAIXVA

LSVYLNOO

les

“LINALAG

SSANLHOMG

~4/PO

Ol

-

/sl

+

O01

‘SSQUTYRIUG

UIBIOS

SUOIIPUOD

HUIMO][O]

SY}

AJLIOA,

‘MOJaQ

Paleis

SW}

ay]

UI

IsNf

SalBUIpP1O-O9

INO}OS

ay]

BUG

O1(ZTTAU

“YTTAU

“STTAW)

198e1d

HO-In,)

ayeudosdde

ay)

ism{pe-as Ayjnyoued

“uawasn(pe

ay)

JO

WIQIWINIIN

ay)

Suisn

Jou

J}

(WINUUXBW

J

NW

LSNOD

2)

(VDA)

288d

FEIUOZLIOH

Ul

UdYRI

JUSWIINSPIW

341

JO

$10

OF

UIYIIM

JP

SaIBUIPIO-O9

A

PUR

X

BY]

YIBY

WYP)

|

F

£1

JO

UOISSIUIa

U9dIDS

B

aais

01

ISWYLNOD

sonpey

OTTAY

snipes

“lou

J]

-W/PD

O1-/E1

+

OO]

S!

UOISSTUIS

UsaDs

BY

4994.)

(sqUSWaINSBIU!

34}

PION)

SOD'O

F

11£

0

=A

$000

F

18TO

=

JO

aouRleg

aNyM

&

ulRIgGO

O1

[CTAY

“OITAU

‘NIWD

3114

Pure

GAY

398

‘OTTAY

©}

Juousnipe

JayLiny

INoyUM

pseogkay

woy

[8],

HOOTE

SLIHM

£

FAGOKM

9219S

~W/P.)

|

¥

OL

JO

UOISSIMLD

UBdIOS

B

40}

OTTAY

UIRS

NAAYD

33S

WWNIALXVI

Ol

LSVULLNOO

pue

LNAI

LAG

01

SSUNLHOIUE

9S

‘pavoghay

woy

,[s]‘[g}14'¢.

WOOTE

NAJAUD

€

IGOW

2/9

NIWD

OddIA

quawmsnipe

FSYWOD

axe

1OU

OG

‘(hu

paimbad

ay]

yaw

0}

syasasd

ay]

JO

Jaquinu

wWNUTUTW

B

Bunsni[py

)

SOOOFIISO=A

$000

F

180

0

=>

‘uIe1gO

0}

posinbal

se

isnipe

syasasd

Yo-INd

ayy

Burs!)

aD

La

Lge

eensiue

U3S3IOS

BAB

OY

LSWULNOD

PUe

INILAG

©}

SSHNLHDOIYE

19S

pavogday

oy]

widdj

,

[4]

Tao.

WOOT

ALIHM

£

APOW

2195

‘Agpssadou

fi

|

y

isnlpy

WYP

$0

+

¢

SI

UOISSIa

Udaids

a4;

4Oay)

|

tun

OL

SSANLHDIYE

18

‘psvoghay

WO

,O1aS,

NSDYIS

INV

1d

©

SGOW

199198

BOUND

OFLA

Agjdsip

yepiozaden

e

Joy

LebAd

Isnipy

‘AuRSS9d0U

JI

‘saSpa

jor

yyRress

joy

dwy

M/A

OSFAU

IsNlpy

UOIVOISIP

[B10]

BY)

YOY)

‘prvogday

WO

64°C,

GYD

UNOI

AG

WAOA

VPS

NOILYOLSIG

ORALAWOAD

WLU)

Zt

UIYIIM

Avydsip

pasjues

&

JO}

(al1Ua,)

ROTMAA)

CLCAY

ISMipy

‘pavoghay

woy

,¢4'S,

GIYD

UNOA

AG

UNO

1998S

“INALIG

Ol

SSANLHOTYE

pue

JONWY

GIW

OL

LSWYLNOD

Las

AULNAD

TVOLLYGAA

‘azis

Avdsip

wwe

+

WET

JO}

EOFAY

19S

“JOULNOD

UASN

AZIS

VOAS

6OFAY

Sursn

paurerqo

aq

ued

ozis

Aeydsip

wuicg

|

yey)

Yayo

pue

Avjdsip

payao]

B

JO}

ISWHd

TWLNOZIYOH

YAS

C£eAd

snlpy

‘preogsay

WO

64'S,

YACUYOU

ON

‘NATUOS

ALIHM

$

FGOW

9/PS

Wwe

F

WW]

azis

ABldsip

20)

yooyD

Avydsip

yesyua.

‘paxsq]

¥

JO]

SWHd

TW.LNOZIYOH

UASN

Cera

asnlpy

‘pivogday

wold

4b,

YWAGUYO

ON

‘NATYOS

ALIHM

&

SGOKW

1995

WIS

%

WWE

|

9ZIS

AR[GsIp

10]

yDayD

“‘prwogdsy

WOL

64°],

JAPIOG

ON

“UIBI9G

BNYAA

|

FAOW

19}9S

wud

=

WUC]

ozs

Aeydsip

ay)

yay)

pswogaay

WOL

64°,

JaplOg

OU

*

UsdIDS

YUM

7

apo

3d3]9¢

‘azis

Avdsip

wus]

+

WER]

JOJ

(8ZIS

OSE)

TTPAY

IsNl[py

oP

P

2D

Oc-F001

BAIS

O}

ISBIUCD

PUL

LNALAC

OF

SSANLHOTUE

38S

pseoghay

WOU

.od'S.

VITYOU

ON

NATWOS

HLIM

£

AGO

199}95

AZIS

WOLLYAA

INSLAG

8)

[SPAY

IPS

‘QIQRIIEAR

S1

WLU

fT

JO

YPM

®

1ey)]

YOaYD

pue

HECIM

WAS?

fspAy

isnfpy

<W/PD

OF

=

001

BAIR

O]

ISPIIUC)

PUR

|

NALA

O1

ssauiysug

jas

‘preogaAey

WOW

,as'o,

YIGUYO

ON

NASYOS

ALIHM

©

IGOW

19}e6

HLGEM

IV

LNOZIIOH

o/

URY)

Ja}Iagq

SI

AIUBaUIY

}BIIUA

A

IBY)

YD9Y,)

AJBSSSOBU

JI

"AMIVIUT]

Iq

JO}

(AILILSUTT

FEILAA)

916

AY

IsAlpy

‘preoghay

WO]

Ste,

pus

asenbs

19]a¢

INSLSd

0!

SSANLHOTYHE

198

ALITA

VINIT

TVOLLUGAA

§

uid

“pop

I

UO

Ag

Gg

=

AQ’

p

JO

aAEBYOA

B

yllM

juaysisuod

ARdsip

ayi

UII

aBeun

Avdsip

asjuad

01

(

bas4q

H)

ocPAY

isalpy

JAFDINIXVV

01

SSANLHDTYE

Puke

ssues-piy

07

ISBIIUOD

125

‘pspoqhay

won

fg)

cae,

GUD

UO

AG

W.IOd

1ajss

(WOA)

ASWHd

TVLNOZINOH

‘Alessaaau

Jl

COPNS

Jaduinf

jo

uontsod

ays

isn{py

WW)

7

=

UY

J9ISC1

paUad

vr

JO}

YSU.)

WNUWIXBW

OF

SSANLHOYE

1S

‘pawogaay

WoL

|]

)od'€.

UALSWU

INV

TE

©

ACOW

399/8S

AULNAD

TWENOZIHYOH

pasumndo

$i

uONNjOSaI

9y]

YY!

OS

JOIIUOS

sNd0,]

IsMIPy

‘psreogady

wo

fs}

‘O4'¢,,

UIT)

Wane

SNIO4

1S

LNALAC

Ol

SSAN

LHOIYE

Pur

asues

prt

oO)

LSVYLNOO

FS

ONELLLAS

S:1DO4

N.B.

In

all

measurements

co-ordinate

x

must

be

less

than

y.

STATIC

CONVERGENCE

Select

MODE

3

SQUARE

GRID

MULTICOLOUR

"3,F8,[9]"

from

keyboard.

Adjust

CRT

CONVERGENCE

RINGS

for

best

alignment

of

colour

segments,

if

necessary.

VOLTAGE

&

WAVEFORM

SUMMERY

POWER

SUPPLY

Assuming

normal

operation

supply

voltage

measured

at

+110v

1100+0.5v

CE819

Adj

RV832

+21v

20.5

+

0.5v

CE820

+12v

12.0

+

0.5v

CE823

+6V

6.2+0.2v

CE82]

Derived

Supplies

All

checks

and

adjustments

must

be

done

in

VGA

mode

3

(31.5kHz).

IC801

supply

+5v

12.5+0.5v

CE813

*NON

ISOLATED*

5.0+

0.25

CE405

IC405

SUPPLY

-15V

8.9V+0.2V

CE411

-153+2V

CE429

*31.5kHz

Operation

Brightness

Supply

B+

-64.0

+

Sv

CE428

(31.5kHz)

84.0

+

0.5v

CE425

*Black

Screen*

Adjust

RV503

31.5kHz

opereation

EHT

24.5+

1kV

CRT

anode

*CAUTION*

SETTINGS

30us

Monostable:

measure

waveform

timing

at

IC402

13

/

D412.

13ms

Monostable:

measure

waveform

timing

at

IC402

12

/

R496.

HORIZONTAL

MONOSTABLE

ADJUSTMENT

Select

Sync

Mode

3

Set

RV406

for

1.3us

+

0.

lus

duration

of

TTL

low

on

IC402

13

VERTICAL

MONOSTABLE

ADJUSTMENT

Set

RV407

for

13.0ms

+

0.5ms

duration

of

TTL

high

on

IC

402

pin!2

NB.

These

are

voltage

measurements

for

correct

operation

using

DVM

only,

Warning:

All

measurements

are

with

respect

to

mains

earth

unless

otherwise

indicated.

High

voltages

exist

on

the

primary

side

of

the

power

supply,

testing

should

only

be

carried

out

with

the

unit

connected

to

the

mains

supply

via

an

isolation

transformer.

Test

Point

PSU

D802

cathode

with

respect

to

5

1c801

T801

|

with

respect

to

5

1c801

[C801

pin7

with

respect

to

5

ic

801

12.5v

de

D813

cathode

D814

cathode

[C803

output

D815

cathode

D416

cathode

B+

Regulator

R501

(both

ends)

D502

cathode

Mode

Detection

[C403

6,7

(VGA

mode

1)

IC

403

5

(VGA

mode

2)

[C403

4

(VGA

mode

3)

TR416

collector

(IBM

85

14/a

mode)

IC

403

9-12

(SVGA

800x600

mode)

Line

Stage

IC

404

6

IC

404

5

T402

2

R44]

(both

end)

D410

anode

CE428

cathode

Voltage

335v

de

335v

dc

110v

de

21v

de

L2v

de

6.2v

de

Sv

de

-260v

dc

84v

dc

<Q.lv

de

<0O.1lv

de

<0.1v

dc

<0.

1v

dc

<0O.1lv

de

8.8v

dc

4v+Ilvdc

84v

dc

20.5v

de

-l5v

de

-55v

dc

op

Ags-

op

AgI-

PAC

OT

OP

Ab8

Opal

FALE

OP

AR'R

WD

Ay

p>

Op

AT

Q>

Op

A]

O>

Op

Al

O>

Pal

ge

OP

AR

OP

AQT

op

rc

mp

ATg

OP

ATI

OP

AIT

oP

Av

oe

~e

ce

ee

wy,

op

a

op

a

@ALIOA

SPOyied

¥7P4a)

spour

()|

pd

(pus

y10q)

|

Pty

¢

uld

ZOPL

¢

uld

por

3}

g

uid

£OF3}

DBCS

OUT]

(9pow

OO90OR

WOAS)

Tl-6

Ud

Cord!

(Spoul

Ct

{og

NGI)

JOWITJOS

GE

PUL

(¢

spoul

WOA)

p

uid

COPD]

(7

spow

YOA)

suid

¢OrJi

(1

spow

YOA)

£9

urd

coro}

UOTIIDIO

IPO

spomnes

ZOSd

(spue

IVOG)

1008

JowNasy

+g

SPOYTES

YT

PG

SPOYyTeD

C1

¥C

indine

CORI

spoyles

+1

8G

opoyies

¢]

xd

MPac#wi

1Ox

ag

ud

oy

adso2

ym

=f

uId

198))

1oxd!

¢

uid

or

padsos

yum

|

uid

TORT

1Q821

¢

Uld

OF

DadSas

YUM

SpOyIeD

TOK

Vd

WUIOd

ISI]

JauOysues

uoNROs!

ue

eta

Ajddns

surew

ay)

01

palsauuod

Jun

ay]

YyyIM

Ino

pauers

aq

Ajuo

pynoys

Sunsat

“Ajddns

samod

ayi

Jo

apis

AreWud

ay}

UO

IStxa

SAaBeYOA

ysty

palRoipul

VSIMUdYIO

SsafUN

YyUTA

suTEW

0}

JOSdses

YUM

are

STUAWOINSESW

[Py

“BUILT

AA

‘AJUO

WAG

Sulsn

uonReiedo

1991105

10]

sjuaWwainstaw

SARIOA

Qe

ASAT

GN

Ciuid

TOPE

UO

YBIY

TLL

JO

uOUNRINp

Sug

O

F

SWIO

EC}

JOY

LOPAY

19S

LNAALSAIGV

FTV

LSONOW

TY

DLLYSA

4

|

uid

ZOD]

UO

MO}

TL]

JO

UOHBINP

SN]

OF

SNC’

10}

DOPAY

18S

€

POW

WAS

199]9¢

LNAWLS

PAV

ATEVLSONOW

TY

LNOZIYOH

‘O6PU

/

TZ]

Uld

ZOD]

I

Bury

WWOJIARM

SINsRaL

‘9]QRISOUOJA;

SUI

|

Tira

/c1

urd

TOFD]

Ie

SunUN

WOJaaem

ainseau

‘ajqesouop

sng¢e

a¢NOILAVO«

2POuR

Lyd

uoneaiado

ZHYS

|S

COCAY

Isnipy

xU99ING

YORIG,

STPAD

yaa)

uonesadO

ZHAG

1

6TPAD

lips

Sora

«QdLV

IOS]

NON«

£1849

AML

FS

Pe

AC

OF

O'R

AS

=

0'b9-

ATE

SI

ATOF

AGB

STO

FOS

ASOF

ST

SONLLLAS

La

(ZHAI)

+g

Ajddns

ssauiysiug

AS|I-

ATdd)AS

SOP!

Ag+

Alddns

{089}

(ZHAS

TE)

€

apowW

WHOA

Ul

sUOp

aq

Isnw

sjuausnipe

pue

sxday>d

[PE

ITSO

CCR8d)

Oc84a

TSSAY

PV

o185)D

ye

posunseol

re

AE

US

e'9

ASO20TI

ALSOFS

OC

AS07001!

IBLIOA

soyddng

paauag

AQ4

AZ|4

AL

Gt

AOL

I+

Ajddns

uoHRJado

sEuULIOU

Suiwunssy

ATddNS

YAMOd

AYAAANS

WHOdTAVM

8

FDVILTIOA

AIBSSAIAL

JI

“SIUIWIFIS

INQ]OD

JO

JUAWUBIE

1899

JO]

SONY

AINANAAANOOD

LY

isnlpy

preogday

wo

(6)

846.

VAOTOIILTAW

GID

FAVAOS

¢

IGOIN

192125

AINADAAANOD

OILVIS

N

MY]

NSAP

AY

ISHME

X

AIDUIPAO-OD

SIMAMLAINSDAUE

[JO

UE

OAK

PC14M28LR

/

PC14M39

y2

Cabinet

Parts

List

a

on

Front

Cabinet

Assy

PC14M28LR

274239

rc

oe

_|

Front

Cabinet

Front

PC14M39

Y2

273572

ey

as

Rear

Cabinet

Assy

PC1L4M28LR

273584.

ar

Rear

Cabinet

Assy

PC14M39

Y2

|

273573

3

©

|

Stand

Assy

273574

-

4

~~~

-|

Chassis

Rail

L

7

273656

5

|

Chassis

Rail

R

(273657

6

“|

Knob

Power

On

Off

473658

CABINET

EXPLODED

VIEW

eae

Knob

Control

|

273575

8

_—s_

|.

Foot

Rubber

273630

9

CRT

0.28

274233

9

CRT

0.39

273587

10

‘Signal

Cable

273578

13

-

Degauss

Coil

273659

Electrical

Parts

List

[ReiNo.

|

Deseription

_——SSSS~dSCP

NG

oe

I

ee

ed

IC201

[IC

M51387P

175652

IC301

IC

TDAI675A

273660

C401

IC

74LS86

175935

[C402

IC

74LS

123

176642

IC403

IC

74LS

156

273661

IC

404

IC

LMI391IN

273662

1C405

{C

TDA8

146

273663

IC801

IC

UC3842AN

274059

IC802

IC

TLP731-LF2

194187

IC803

IC

78M12

REG

273664

1C804

IC

TL431CLP

272290

pid

Transistors

|

TR205-207

TR

2SDI610C

/

28C3955D

273665

TR208-210

TR

25D468C

193513

TR301.401-403

TR

BC547C

241116

405

410.412

416-418.802

803.502

TR404

41

|

TR

BCS557

273599

413.419.420

503

TR+406

TR

28D667AC

273602

TR407

TR

BU2508AF

273601

TRS501

TR

MPSA43

273603

TR504.414

TR

TIP31E

273600

TR505

TR

MPSA93

273604

Q801

TR

SMP4N60

273605

D301.412.413

D

1N4002

175543

D302

DZ

C2V7

1/2W

175767

D303.404-408

D

IN4148

270754

414.419.421

$17-820.823

D401.410.411

D

BYD33G

273607

501.502.807

810.812

D402

D

BY328

270754

D403

D

BYD73F

273608

D415

AV

DZ

C33V

1/2W

273609

D416

AY

DZ

C4V7

1/2W

175021

D417

LED

GREEN

273617

D418.805.821

Thyrister

TICP106D

273615

D422

DZ

COVE

1/2W

171493

D801-804

D

BY133GP

273611

D&06.822

D

BYD33M

273614

D808

D

RGP15M

273612

D809

DZ

C16V

1/2W

273610

D8

13.814

D

BY399

273618

D8I5

D

SBI40

273613

D825.826,503

A,

|

D

IN4003

157656

Description

Coils

L204.205

/!

Coil

33uH

Choke

TALO4T

L402

Coil

Line

Linearity

L403

Co

22uH

Choke

L4004

Coil

700uH

7679

FL801

Coil

Line

Filter

FL802

Coil

Line

Filter

TLF-OLITA

T401

Tx

Line

Drive

T402

*.

Tx

Flyback

7789

T403

Tx

Diode

Modulator

Tso1

“A,

Tx

Switch

MODE0139-3

[i

Variable

Resistors

VR219-221

|

VRSF

10k

923179

Linear

RGB

225-227

VR303.406

450.491

VR316

VR211.313

409.451

VR407.422

VR503

VR429

VR433

VR469

VR832

|

Miscellaneous

SK9O1

AY

CRT

Socket

CVT3240-1251

2070

S801

AY

Switch

Power

On

Off

4074

F8or

4,

Fuse

T2A

250V

R8OE

7,

Thermister

De-Gauss

3569

R803

Thermister

[5

Q

NTC

5313

G204

Spark

Gap

CRT

14"

M34AFA60X14

PC14M28LR

CRT

14"

£2971

B22TC54ET

PC

14M39

Y2

Signal

Cable

Mains

Lead

Cancellation

Coil

PC

]4M28LR

Y2V

VRSF

10k

22

3199

VRSF

100k

&

Linear

V

Linearity

VRot

LOK

Q

L'r

Hp.

Vs.

Vce.W.B.C

VRSF

47k

&2

Linear

VRSF

50k

Q

Linear

20%

VRSF

4.7k

Q

Linear

VROT

100k

Q

3213

H

Phase

VROT

100k

Q

3206

Bnghtness

VRSF

470

Q

3173

HT

Adj.

Pt.

No

273667

—

273619

273669

273670

273621

273620

273622

274237

273623

273624

273672

273673

273674

27367)

273675

273676

274247

273677

273678

274238

273626

240082

213993

273596

273627

274233

273587

273578

274248

274249

LQ

V4w

R307

M28LR

only

270

Q

W/2w

R309

M39

Y2

only

4702

t/2w

A,

|

R256.257.258

241520

680

Q

V/2w

R309

M28LR

only:

Ik

Q

t/2w

R260

18k

Q

W4w

R446

180k

Q

lw

R835

R806

273593

R307

M39

Y2

only

0332

12w

A

0.68

Q

l/2w

1.8

Q

1/2w

R444.498

47Q

12w

A

R261.441.465.472.

273590

$2

Q2w

R3l4

273686

2202

1/2w

A

|

R501

241372

820

Q

1/2w

R442.499

15k

OQ

Iw

R807

176339

3k

Q2.5w

A

R239.241.243

274234

3.6k

Q

l/4w

R234

16k

Q

1/4w

R232

33k

Q

l/4w

R416

273690

33k

Q

1/2w

R505

176331

43k

Q

1/dw

R414

193716

51k

Q

L/4w

R410,412

273692

100k

Q

1/4w

R418,507

273693

|

Metal

Oxide

Pee

0.332Iw

A

R808

771444

56k

2

3w

R805

974235

Pp

SSSCS*d

Wire

Wound

|

3.3

224w

213992

68

Q

1.5w

273698

150.

Q

7w

273696

Ik

£2

4w

273697

8.2k

22

4w

273698

rs

Metal

Glaze

ae

Aira

«(

SO]

10

273701

273702

273703

273704

273705

273706

178047

C409.43

1501

C413

C502

C826

C229

230

C809

C403

415

0.0tpF

400v

O.022pF

250v

O.022pF

400¥

0.022nF

630v

0.033uF

250v

0.

buF

400v

0.47uF

63v

170608

270614

170851

1OpF

1605

100pF

400y

220uF

L60v

L00pF

400v

273715

180pF

220pF

273717

470pF

plate

273718

0.01

uF

63+

273719

0.01uF

2kv

A,

273716

en

1

470pF

630v

C439

273708

G80pF

1.G6kv

Cail

273709

0.0033uF

160v

C404.410.8

15.816

273710

680pF

1.6kv

C422

273709

0.0036pF

1.6ky

C420

M28LR

only

273711

0.033pF

630v

C80

273713

0.047

pF

1.6kv

C420

M39

Y2

only

0.012pF

630v

C421

M28LR

only

273712

0.015

pF

630v

C421

M39

Y2

only

0.82uF

160v

C419

M28LR

onlv

273714

|

IuF

250.

C419

M39

Y2

only

|

[t~é‘“‘(C™‘C*dCLne

Across

|

IpF

250v

ac

A,

C801,802

Amstrad

reserves

the

nght

to

supply

seleetive

components

CAUTION

{IVE

PARTS

st

RB40

|.

RUG’2HT

ADJ.”

REPLACE

+

R31

RE33

OF

FUSE.

’

FIRE

OR:

CONTINUED:

PROTECTION

MAIN

PCB

COMPONENT

LAYOUT

spy

|

mr

=

¥.

iad

aa

re

ET

LKO1S

EKOL4

esa

RSIS

Ae

bei

af

-

negneae

ne

a

RSii

i

“TRS01

TRSO2~

ae

a.

o.

op

Oe

fat

4

mz)

fa)

a

+

a

mm

Qo.

wi

2.

YX

=

.

:

woe

: ;

Ltt

H.DY

~"

-

ae

ey

SS

aks

RED

PL

402

BLUE

-

R468

D422

R310

&

UCENTRE

Lobel!

wt.

Gg!

R459:

R460:

-

c

«ne

6

TR420

TR411

e432}

R4s@

ee)

ea

eee

‘f

te

3

s

ae

meen

a

oe

Tak

;

eee

a

an

ae

Bt

2

;

:

host

:

é

-

C440

.

0404

:

EN

ee

ERD

Bremen

Ld

12

CRT

PCB

COMPONENT

LAYOUT

DIAGRAM

2/3

&

WAVEFORMS

|

MAIN

SCHEMATIC

C3i2

eer

yan

|

nee

Hy

elgi

is

|

I~

siyp-ot

srk

y

40

4

"

i

ke

=

“hore

aaa

~Aoos

bzkd/er

vid

ZzoPor

ye

Jpainsboy|

(Ajddns

styour

poyojos,

Ua)

tolp

,oRH

1p

posnsoayy

Jidvisottort

oc,

FIUOSIAVA

SHS

AQz

amos

Oa

i

BWG

OT

SWE]

AQ)

9GFUu/zZt

Wid

ZORDI

YO

palispoyy

JWVLSONON

surg]

am

BIG:

o

|

“f

io

ba

ea

cl},

|

a

dl‘)

7.05

-

tl

cele

hy

—t—

AOL

G

ud

ZOZIS

10

paiisoayy

ONDINVIG

%

SSA

loud

(ysDI}U0D

OY

Bulpsjoasan

sepipA}

‘VIUOSIAVYM

|

Oluo

D407

f\

164148

BLANKING

=

tuou

‘

40

rer

pate

=

AGE

AQ-]-————-

-

dh)

acl

E

ae

(MO

L'9'GZZAU)WOU

ACG

}PAPy

(MOD

L'O'STTAUNMNY

AGL

4201

X¥DUL

AGG

Yo

_

dey

|

DRAReereeeIee

RL

fPAG|

__

wou

ee

wan

eae

JUyUOTg

AOI

mse

I

eT

cic

1

ud

togg]

ie

padnspopy

307904109

/OPML

1D

painspaty

‘LY

JO

Bepotyos

‘gay

uo

pasnsnoyy

NYOJIAVM

INdino

a1]

HYOSIAYM

LNdLNO

UM

(XOB

ALI)

HYOsIAVA

OFC

l

8

TO

ee

ene

.

ar

<

e

ead

pees

I;

222

«lez

¥

o

wl

w

ac5

a)

a

es

fl

lel

WJ

rae

2

Fte2@

2,

[seo

-

&

agu

>

a

pi

35

x*

3

in

wy

+

(i

Of

ie

;

eet

ea

2

7

Ge

{

=F

YF

¢——__—

g

:

|

a4

eae

Bl

syatye

‘ia

Le

spavaray

J

8

got

158

ala]

oy

ae

J

85

-

Pd

t

We

t

ry

=

t

:

|

5

oe

aT

“ri

|

pis

§

His

oh

é

ae

x

5

ui

|

l

ime

ie

4s

“18

olé

ete

j

;

=

<]

—

a

ae

”

is

ach

5

i

=

wo

ua

ro)

uw

_

ze

Za

--

aa:

:

Fe

aes

>

fe

=

ee

Bee

eee

Eur

>

398

‘

8

cd

XE

ee

ere

Sas

Sh

Ps

=

i

33

\—©

aX

th

3%

a

«

era

——{>—-

«

a

mo

=

ovr

Z

3

Po

t>

a

ia

ale

;

Lope

Bex

|

EUS

a

os

aac

&

ae

aa

WEY

ook

AND

comer

“3

Zo

Ms

:-

a

ee

e

a

>

OR

\4

is

a

-

9

O

Sa

es

>

2Vs

:

Oo

©

st

n

=

a

Z

<|

g

uw)

2>

ri

‘

w

18

$e

24

poe

%

a

HO

te

{af

gu

=

Me

:

7

4

(mind)

ieee

oe

aor,

aint

4

oe

@

a

©

eae

eee

aay

8

S|

Bek

Rep

aEL:

|

sas

:

ill

TCE

2

aes

Ot

ea

Vase

ne

cay

Go

|

sis

AUS

pals

acta!

:

|

Hi)

a,

|

Wee

of

%

aN

ae?

Se

pena

Cae

aOR

(en

erent,

Chen

enees

UMMIY,

On

oI

abs

=

bet

LAS

MAIN

SCHEMATIC

DIAGRAM

I,

-

——

~~

B

ean

os

ap

eS

ee

--

_

|

ew

an

ee

ne

ee

a5V

os

ca

aa

Da

+

:

oe

nn

en

i

+490

RL?

SSS

|

:

id

HO

~~

:

;

it

ne

ee

ne

me

R4i9

i.

“R403

:

i

ee

a

ee

aes

eS

Ra

)

S

geieeees.

6

Se

ee

}

te

2

PL

401

+SY

PN

Trai

|

i

H

ss

>

A

\

TRoi7

ary

7.

=

a

i

:

'

7

2492

|

:

SS

3cs47c

Tae

“Roi

TR402

i

|

'

\

:

>

ge

ae:

aoe

eS

ny

|

4

TT

470u

|

250K

eCSs70

Nat

Ay

:

i

(ROG

$

H

ASYNC

=

R493.~—~SO”*«SS

OR

i

!

i

hal

aad

429

R4ase

\

Lau

budce

:

fone

|

:

aN

j220r

'

USYNC!

Geen

a

220K

100K

PS

TROL

,

1

|

asa

a

;

uv

'

;

hy

'

Sa

ha

!

T

i

F

bo

i

H

is

!

te

/

2008

|

gg

|

,

|

ae

.

,

a

ot

n

+

ot)

acsarc

.

a

sas

|

c4168

ae

T4n7

|

in

ayo

=

biti

ae

ee

mL

2N4148

rare

i

‘

’

i

ud

7

‘

oso

i

_

:

! :

i

:

—

+5

nm

j

i

30us

:

——?

oy

:

i

:

ane

pari

|

1

4

i

|

phe

o's

~™

R402

:

‘

;

LL,

eT)

R4d29

“

‘

es,

a

|

SYN

A,

rit

T

ro

—+

fae

Sites

sau

LS6K

arse

i

—

(ps0

!

|

INPUT

i,

sh

cms

ee

!

ASG

|_|

y-szze

|

iam

|

~

/

2401

Pnranoes

bik

|

asus

;

po

SY

WIOTH

|

acca

S

|

igs

—

Sp

:

eS

pees

.0K

|

Sn

;

!

i

ot

100n

sy

i

!

H

i

of

sua8h

:

\

i

,

tev

'

a

i |

|

i

|

i

oe

;

|

i

$

ae

aan

re

bree

=

-

I

x

:

Pape

Ghee

SS

an

-_

Te

P|

a

450

©

:

+5U

D4

;

a

|

i:

1

{R448

=

te

ee

———

ge

ee!

et

;

RASS

one

Ok

aK

|

‘leer

;

\

x

Wis

a

te

;

--

SS

Te

sata

ke

J.

3

|

;

ud

00K

i

‘,

ee

|

:

|

i

‘

:

bs

|

‘

valaaten's

|

W615

f14

37202109

|

‘at

+

es

Ye.

——

[IRs

:

i

i :

'

:

iS

ae

ee

a

ee

i

in

=

‘

:

|

iia)13j12]13

29°9

a

ok

oo

ie

eer

oat

SEs

OM,

|

3

.

oan

p

}

14

.

|

ee

(aes

ae

:

||

|

oe

!

ros02

2

EA

;

ee

|

!

|

I

4

it

TC401

at

a

ae

sridv

|

cae

aa

ee

eer

GRLP

aE

|

Pd

|

a

i

|

~4L$123

ae

sou

|

ee

es

eee

ito

lo

|

;

|

74LS36

| |

|

eS

lle

|

IG

AS

24

[3

2

i

|

!

|

!

ol

;

i

Be

!

i

|

hed

te

re

i

|

j

|

™0403

!

|

i

:

7Z4LS156

;

|

:

i

|

H

|

3

‘

:

|

,|

Ce4o1

|

“Ve

8

Ss

6

2

a

=H

i100

j

fF

re

ane

sou

4

|

™

{

|

!

i

m

'

!

he

Vaio.

vac

1d

:

i;

t

|

t

;

i 1

:

3

:

|

R417

2416

MoDEy

|

#22U

|

joe

|

t

aoe

i

\

T

|

.

;

|

:

i

R415

2414

wooe2

|!

aR

SYNC

DESCRING

LOGIC

|

(aR

tae,

.

R497

|

"A412

2412

MODEL

;

|

(SOURCE)

1

Bx

-—_-

i

!

+SU

['98"

aaa

825.

Sik

H

rn

OW4

r

12410

|

!

i

R425

rh

;

Bie

i

mie

ae

|

oa

E/W

PINCUSHION

|

}

I

| |

rapa

=

Ir411

fa

area

el

:

4os18

CE405

ait

——

e439

1

j470K

Lexa

CORREC

Pak

<i

Raex7e

+}

CEA

Ay

0417

tao

—_——-—+--_____-

Toa,

ag

¢.

GREEN

41

ay

*T

sau

or

|

+

|

ie

:

.TR416

“ODE4

T

R430

RABE

a5

a

|

Ee

ees

ee

'

4.PHASE

|

4

ne

|

;

378

aR

en

|

Cue

|

Res

'

;

0413

|

é

A

z

|

an

tW4

ae

RUua3s

|

7

|

1N4002

|

4K?

400K

|

'

‘

rt,

PHASE

|

at

_

A523

'

0412

ae

UGA

nF

|

,|

CE411

iia

=

i

!

1N4002

i

-

4

|

SUGA

|

!

LINE

MRazo

iL

GHIET

?

is

;

HORTZONTAL

|

Ai

a

DEFL.

COIL

18

7

(6

|

‘

“1R438

+214

|

rn

i

|

lg

R441

Lcao7

ae

/.

[War2

OLS

ui

re

‘sd

te

i,

LINE

ORTUE

H.MONQ

~+—_»

H

ae

or:

2

a

ae

ne,

*

eee

od

be

te

PSU

SCHEMATIC

DIAGRAM

D806

aYDSSM

R807

{4

iKS

ind

|

aa08

paez6

ORS

IN4003

iho

|

zd

1

:

|

eee

LPR?

boca

=

ves

|

Ra04

|

pie:

2

}@ixas

al

250uact-

BY

356°

OA

BY:

336P

|

3

“Lxeis!

(oq

|

ocak

tu

|

--

9

IMS

4{

C807

i

_

OH

uM

M4700

|

uxeoi

&

~

|

=

oe

.

t

!

:

P

:

TLFQIIA

i

aN

|

;

aK

“peas

ZN

@rTLFoi0a

!

—+

@°

¥

eer

mass

AKo

|

-

rome

:

re

snp

A801

=

BRD)

og

3d

aaa

le

ee

250URC

4A

BYLSSGP

TT

52

que¢d

5

ay

1

33GP

;

475

|

:

’

@o

7

i

|

—_

i

ok

|

ow:

|

POWER

See

aA

ae

eR

|

!

t

if

1

|

:

SUPPLY

|

i

v7

DBz0

|

yet

oe2t

:

ms

NOTE

:

FOR

i104

VERSION

rroptoe

I

f

DOUBLER

PWB

83-4646-1

TF

4

;

IS

ADDED

;

MONITGR

CHASSIS

TYPES

¥Y

79-1536-5-002

MK

-

NOT

FITTED

@®

-

t:10v

OPTION

*)

-

not

S©ITTeED

ON

.19Y

®

-

useo

arTH

Y

CHASSIS

9.39

CRT

AND

ALL

v2

DHASSIS

@

-

CANCELLATION

TOIL

FITTED

ON

Y2U

CHASSTS

aNLy

A.

fl".

SRITICAL

SAFETY

COMPONENT

NOTE+

B+

VOLTAGE

JARIES

WITH

CHASSIS

TYPE

(SEE

SERVICE

“MANUAL

=CR

DETAILS)

Teo

\

pe

tf

rl

7

J

T

ce0

S|

(9

j

elit

79803

‘Ta00u

|

¢

1d

WI

EK4021

|

“s

Pag

io

A

BYOSIM

Lada.

|

3)

Sad

[3

2

T

830u

ij

os

|

co]

pa20

010

10R

BYD33G

+12u

Ra38

0817

Ps

SYNC

he

ee

eae

52a

RB26

>Raze

{A80R

({390R

L

la

RW

3

aac

|

TLP?31-LFa|

;

RS

i

Rass

i

Ras3

910R

Rese

470R

FROM

F402

I

i

zca04

7

TL

431CLP

|

1

’

4104

ADJUST

a

Rez!

|

|GGR

{|

TiS

i

:

1.7223

9

SAr=TY

AND

ZTSOLATZON.

THE

POWER

SUPPLY

IS

ALWAYS

LIVE

REGARDLESS

OF

THe

MAINS

SUPFLY

POLARITY.

THEREFORE,

FOR

SERVICING,

*HE

MONITOR

SHOULO

BE

SUPPLIED

THROUGH

A

“AZNS

ISQLATION

VRANSFORMER.

THE

POWER

SUPPLY

REMAINS CrARGCO

FOR

ABOUT

30

SESS

AFTER

SWITCHING

OFF.

ALOZID

TOUCHING

THIS

AREA

CURING

THIS

TIME.

MOST

OF

THE

MONITGR,

OTHER

“hAN

THE

POWER

SUPPLY,

IS

ZSOLATED

FROM

THE

MAINS

3Y

7801,10802,C824

AND

AN

ALR

GAP

GF

43MM

OR

MORE.

TO

MAINTAIN

SAFETY,

ENSURE

THAT

AFTER

REPAIR

THE

AIR

SAPS

ARE

NOT

REDUCED

BY

PROTRUOING

WIRES

=°1C.

1

COMPONENTS

MARKED

ZN

ON

THE

PARTS

LIST

OR

CIRCUIT

DIAGRAM

ARE

SAFETY

APPROVED

TYPES

AND

SHOULD

B&

REPLACED

ONLY

WITH

APPROVED

COMPONENTS

AS

GIVEN

IN

THE

PARTS

LIST.

LT

5S

RECOMMENDED

THAT

OTHER

REPLACED

PARTS

SHOULD

8& OF

THE

TYPE

SFIGINALLY

FITTED,

PARTICULARLY

RESISTORS

STCOO

OFF

THE

PRINTED

BOARD.

=ATLURE

TG

OBSERVE

THE

ABOVE

MAY

RENCER

THE

CHASSIS

ANB

EXTERNAL

ACCESSIBLE

PARTS

LIVE,

GR

CAUSE

ITHER

ARZARCS.

+#110U

{

SOURCE

)

+2100

SOURCE

)

+12U

(SOURCE

}

_

+6U

(SOURCE

>

i

9815

T

CHEATER)

DSos

eee

é

$8140

a

ie

eal

ee

|

IN40O3

gee

+2iv

FoR

aol

:

id

—

tees

ee

re

|

:

_—*

me

eee

Te

|

os92

!

:

—+

ay0336

B+

VOLTAGE

REGULATOR

TRSO1

MPSA4S

i.

——

MAIN

SCHEMATIC

DIAGRAM

3/3

412y

LN

®

+110U

R261

/LK228

W234

eet

33uH

ah

c250

Les

+1

(E219

Sin

@u

“oon

R204

:

1KOxK

160U

a

SIGNAL

rea)

;

CABLE

Seat

10u

R240

/LK 226

R23B/LK227

Re42/_K

27

PL201

GEOR

6H0R

e

160U

Jea0R

®

wo

EMT

LEAD

]eeoe

©

(+254)

R245

GA0R

L203

a

an

x

/LK232

as

1

AS

2

|

TO

FAX

oes

ae

=

PANEL

CRUTION

19

wiz

R214

L202

/LK231

REPLACE

ONLY WITH

10K

30K

10K

nonrRAST

2ueH

©

IDENTICAL

TUBE

cezoa

OR

APPROVED

ALTERNATIVE

(SEE

SERUTCE

MANUAL

)

DAG

€.

BRAID

e

—

—=

P.AAND

EARTH

eae

Bei

oma

‘ge

NOTE-SPARK

RING

EARTH-

—

GO

2

FLYING

LEAD

CONNECTIONS

=

10n

FROM

TUBE

SASE

TO

SK404

1

Hames

10

AND

TO

DAG

EARTH

ARAID.

OWS

PL20%

3

FROM

D.S.T.

ats

100

1

23

4

5

6

7

@ 9

10

11

1213

14

15

Ice201

MOI

Sa7P

30

29

28

@

26

B24

23

oP

et

20

19

18

17

16

+y2y

cece”

+

Ree4

RSL

t

—

'00u

oar

LOK

oy

Fae,

©

Sou

+11

FL292

4¥110Y

OUC

HEATER)

ae

FEUC

HEATER)

Ee

ae

MIXED

BKG.

F

8.u.CLAMP

ou

ss

Bo

|

y5u

—

=e

FROM

MAIN

PANEL

*K

-

NOT

FITTED

ON

SOME

CHASSIS.

CERED

loon

100y

@

--

FITTED

ON

TYPE

Y2,72U

CHASSIS.

|

M@

NOT

STTTED

CN

PFE

2,

@

ORS.

AMSTRAD PC14M28LR User manual

Popular Monitor manuals by other brands