Commodore 1935 Bedienungsanleitung

Produced By:

Commodore International Spare Parts GmbH

Braunschweig, West Germany

SERVICE

MANUAL

1935'

SUPER VGA COLOR MONITOR

JANUARY, 1992 PN-400418-01

INTERNATIONAL

EDITION

SERVICE

POLICY

AND

PART

NUMBER

INFORMATION

MAY VARY

ACCORDING

COUNTRY.

SOME

PARTS

MAY

NOT

BE AVAILABLE IN

ALL

COUNTRIES.

Commodore Business Machines, Inc.

1200 Wilson Drive, West Chester, Pennsylvania 19380

U.S.A.

Commodore makes no express

implied warranties with

regard

the information contained herein.

The

infor-

mation

made available solely

basis,

and

the

entire risk as to completeness, reliability,

and

accuracy

with the user.

Commodore

shall

not

be liable for any

damages in connection with

the

use

the information

contained herein. Thelisting

any available replacement

part herein does not constitute in any case a recommenda-

tion, warranty

guaranty as

quality

suitability

such replacement

part.

Reproduction

use without ex-

press permission,

editorial

pictorial content, in any

matter

prohibited.

This manual contains copyrighted

and

proprietary information.

part

this publication may be reproduced, stored in a retrieval system,

transmitted in any form

by any means, electronic, mechanical, photo-

copying, recording

otherwise, without the

prior

written permission

Commodore

Electronics Limited.

Commodore

Electronics Limited.

S.A

1935

SERVICE

MANUAL

TABLE

CONTENTS

SPECIFICATIONS

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

SAFETY PRECAUTIONS AND NOTICES

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

ALIGNMENT AND ADJUSTMENT

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

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

ASSEMBLY AND DISASSEMBLY

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

BLOCK DIAGRAM

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

TROUBLESHOOTING CHART

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

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

PARTS LIST

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

.........

CIRCUIT DIAGRAM

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

SPECIFICATIONS

Application:

Power Input:

Video Signals:

Sync. Signals:

Sync. Frequencies:

Signal Connectors:

Display Tube:

Display Area:

Display Colors:

Display Characters;

Maximum Resolution:

Misconvergence:

User Controls:

1935

SERVICE

MANUAL

A typical data display device for graphics & text

PC applications. ,

watts (nominal) AC rated voltage.

Refer to

R/C

label.

Analog: 0.7 Vp-p,

RGB

positive.

Separate Sync: Horiz./Vert.,

TIL,

positive

negative.

Composite Sync.: Negative going

TIL

(MAC II).

Horizontal: 31.468 KHz I 35.52 KHz

Vertical:

-87

15-pin, O-shell connector.

VGA to MAC

interchanger (optional).

14"

degrees, 575R, 29.1o neck, 0.28mm

dot

pitch, in-line gun, non-glare screen.

Type number:

M34KBV80X11

240

x 180mm (H x

Infinite

char. x

rows

a 10x10 matrix.

1024 dots x 768 lines

Center Area: <=0.3mm

Corner Area: <=0.4mm

Power

ON/OFF,

Brightness, Contrast, Voltage

Selector, Horiz. Phase, Vert. Size.

1935

SERVICE

MANUAL

•

COMMODORE

1935

SUPER

VGA

COLOR

MONITOR

•

1935

SERVICE

MANUAL

Service Controls:

Environmental

Conditions:

Dimensions:

Gross Weight:

PWB-1002: R-BKG, G-BKG,

B-BKG

R-Bias, G-Bias, B-Bias.

PWB-1001:

Voltage Adjust.,

Pincushion, Horiz. Width, Horiz.

Hold

Horiz.

Hold

2, Horiz. Phase 1, Horiz. Phase 2,

Vert. Size, Vert. Center, Vert. Linearity,

Vert.

Hold,

Screen.

Operation: 10 to 35 degrees C ambient.

Storage: 0 to 65 degrees C ambient.

Humidity:

80%

(non-condensing).

Altitude:

to 7000 ft. above sea-level.

388mn1 (H) x 370mm

(W)

x 420mm (D).

14 kgs.

SIGNAL

CABLE

CONNECTIONS

Signal

1 Red Signal 8 Blue Return

Green

Signal 9

3 Blue Signal 10 Digital

Ground

4 Monitor Sense

Jumper

Ground

to Pin 10 12

Ground

Horizontal Sync.

6 Red

Return

14 Vertical Sync.

Green

Return 15

•

1935

SERVICE

MANUAL

SAFETY

PRECAUTIONS

AND

NOTICES

SAFETY

PRECAUTIONS

Observe

all cautions

and

safety related notes located inside the

monitor

cabinet

and

the

monitor

chassis.

Operation

the

monitor

outside

its cabinet

with

the cover

removed

involves

the

risk

shock from the

monitor

power

supply. Repair

work

the

monitor

should

not

attempted

anyone

who

not

thoroughly

familiar

with

all

necessary safety precautions

and

procedures

for

working

high

voltage

equipment.

not

install, remove,

handle

the

picture

tube

any

manner

unless shatter-

proof

goggles

are

worn. People

not

equipped

should

kept

a distance

during

handling

the picture tube. Keep the picture

tube

away

from the

body

during

handling.

The

picture

tube

is constructed to limit X-radiation to O.SmR/HR

300 micro-

amperes

anode

current. For continued protection,

use

the

recommended

replacement

tube

only,

and

adjust

the voltages so that the

designated

maximum

rating

the

anode

will

not

exceeded.

PRODUCf

SAFETY

NOTICE

Many

electrical

and

mechanical

parts

in this chassis

have

been

specially inspected

for safety,

and

the protection afforded

them

cannot

necessarily

obtained

using

replacement

components

ratedfor

higher voltage,

wattage

etc. Before

replacing

any

these components,

read

the

Spare

Parts List

the

end

this

manual

carefully.

The

use

substitute replacement

parts

which

not

have

the

same

safety characteristics as those specified in the Spare

Parts

List

may

result

shock, fire, X-radiation

other

hazards.

1935

SERVICE

MANUAL

SERVICE

NOTES

When

replacing

parts

circuit

boards,

clamp

the

lead

wires

around

the

terminals

before soldering.

When

replacing a

high

wattage

resistor\( >0.5 W

metal

oxide

film resistor)

the

circuit

board,

keep

the

resistor

about

(1/2")

away

from

the

circuit

board

Keep

wires

away

from

high

voltage

high

temperature

components.

Keep

wires

their original positions

as to

minimize

inteference.

SAFETY

TEST

Before

returning

a serviced

monitor

the customer, a

thorough

safety test

must

performed

to verify

that

the

monitor

is safe to

operate

without

danger

shock.

Always

perform

current

leakage check

the

exposed

metallic

parts,

such

screw

heads,

as follows:

Plug

the

line

cord

directly into a

rated

AC. Do

not

use

a Line Isolation

Transformer

during

this check).

Use

voltmeter

having

least 5000

ohms

per

volt sensitivity as follows:

Connect

a 1500

ohms

watt

resistor, paralleled

a 0.15mfd, AC

type

capacitor

between

known

good

earth

ground

(such as a

water

pipe

conduit

etc.)

and

the

exposed

metallic

part

simultaneously.

Measure

the AC voltage across the

combination

1500

ohms

resistor

and

0.15mfd capacitor.

Reverse

the

plug

the AC

outlet

and

repeat

the

steps

for AC voltage

measurements

for each

exposed

metallic part.

Voltage

measured

must

not

exceed 0.3 volts RMS. This

corresponds

to 0.2

milli-amps AC.

Any

value

exceeding this limit constitutes a potential

shock

hazard

and

must

corrected immediately.

L2J

good

earth

ground

0 0 To exposed metallic

I O.lSmfd I /

part

-~c-11-Jr-----

1500

ohm

watt

1935

SERVICE

MANUAL

ALIGNMENT

AND

ADJUSTMENT

CONDITIONS

Power

Supply: AC 220V,

60Hz

Warm-up

Time:

The

monitor

should

powered

for

least 15

minutes

before

any

adjustments

are

made,

except for convergence,

when

minutes

are

required.

Signal Input:

Video: RGB Analog, 0.7 Vp-p, positive.

Sync.:

Horiz.

and

Vert.

separated,

positive

negative.

Composite,

negative

going

TIL

(MAC II).

Scanning

Frequencies: FH: 31.468

KHz

I 35.52

KHz

FV:

-87Hz

All

adjustments

should

made

using

a signal

FH=31.468 KHz,

unless

otherwise

defined.

Parameter

list

signal

timings

generated:

1024x768

Interlaced

Mode:

(35.52 KHz)

Horiz. Sync. Polarity

Vert. Sync. Polarity

Total PELs

per

Line

Active PELs

per

Line

Line Blanking

Time

(PELs)

Line Sync.

Pulse

Width

(PELs)

Line

Front

Porch

Width

(PELs)

Line Back

Porch

Width

(PELs)

Total Lines

per

Frame

Active Lines

per

Frame

Fields

per

Frame

Field Blanking

Time

(E/0

Lines)

Field Sync.

Pulse

Width

(E/

0 Lines)

Field

Front

Porch

Width

(E/0

Lines)

Field Back

Porch

Width

(E/0

Lines)

PEL

Time

(ns)

Total Line

Time

(us)

Total

Frame

Time

(ms)

Frame

Rate (Hz)

POS

1264

1024

240

176

817

768

25/24

0.5/0.0

20.5/20

22.27

28.15

23.00

43.48

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