Philips GM 5605 Manuale utente

MANUAL

PHILIPS

Cathode

ray

oscilloscope

5605

66-(02

58.2-10

1/86-4/01

Contents

GENERAL

Introduction

II.

Technical

data

III.

Accessories

DIRECTIONS

FORUSEAND

APPLICATIONS

Installation

Adjusting

tothe

localvoltage

Earthing

Checking

before

switching

on12

Switching

on13

II.

Operation

Preliminarysetting

Displayingwaveforms

C.Howtouse

the

input

•v,v*$r

-j-

•

*••

III.Applications

Measuring

the

amplitude

Using

theX

input

Displaying

diode

characteristic

Displaying

hysteresis

loop

SERVICE

DATA

Circuitdescription

A.Y

amplifier

Trigger

pulse

shaper

Timebase

generator

D.X

amplifier

Cathode

ray

tube

-3-|

Supply

part

Contents

II.

Gaining

access

tothe

parts

Removing

the

cabinet

panels

Removing

the

knobs

Removing

the

front

panel

Removing

the

window

andthe

graticule

III.Maintenance

Waferswitches

Cabinet

panels

IV.

Adjustingelements

and

theirfunctions

Checking

and

adjusting

Mainscurrent

Supply

voltage

+ 280V 38

Ripple

onthe

supplyvoltage

280V 38

Barrel

and

pincushiondistortion

Focusing

and

astigmatism

F.Y

amplifier

G.X

amplifier

Time

base

generator

VI.

Replacing

parts

Thermalfuse

Supplytransformer

Switches

SK2,

SK3

and

SK4

Switchwafers

SK2

Switch

wafers

SK3

Switch

wafers

SK4

Potentiometers

onthe

front

panel

. 48

H.CRTand

valves

VII.

Fault

finding54

VIII.

List

parts

List

mechanicalparts

List

electricalparts

List

figures

Adjusting

tothe

local

mains

voltage

2The

apparatus

tilted

position

Preliminarysetting

Functions

ofthe

controls

and

sockets

Measuring

the

amplitude

Examples

Lissajous

figures

Determining

the

phaseanglessine

a/b

Network

for

quadrant

determination

Someparticularphaseangles

Displaying

the

diodecharacteristic

oftheOA85

Displaying

hysteresisloop

Blockdiagram

ofthe

"bootstrap"

integrator

Circuitdiagram

ofthe

"bootstrap"

integrator

Removing

the

cabinetpanels

Removing

the

knobs

Removing

the

bottomplate

and

frontpanel

Removing

the

graticule

Squarewaveresponse

oftheY

amplifier

Squarewaveresponse

oftheX

amplifier

Replacing

the

thermal

fuse

Replacing

the

supplytransformer

Anodeconnection

Positioning

the

c.r.t.

Right-hand

side

view

with

adjusting

elements

and

units

Left-handsideviewwith

adjusting

elements

and

units

Front

view

with

adjustingelements

Blockdiagram

Unit

A;Y

amplifier

List

of figures 5

Circuit

diagram

oftheY

amplifier

Unit

time

base

generator

and

trigger

pulse

shaper

Circuit

diagram

ofthe

triggerpulse

shaper

UnitC;

amplifier

Circuitdiagram

oftheX

amplifier

Unit

beam

control

Circuitdiagram

ofthe

c.r.t.

circuit

Unit

H.T.unit

Unit

supply

part

Circuitdiagram

of the

supply

part

Important!

correspondence concerning this apparatus

please

quote

the

type number

and

serial number

given

on the

plate

at the

back

of the

apparatus.

GENERAL

PART

Introduction

The

cathode

ray

oscilloscope

5605

hasan

extensive

fieldof

applica-

tion

andis

particularlysuitable

forusein

service

workshops

andfor

educationalpurposes.

ForX andY

deflection

the

apparatus

contains

d.c.

amplifiers

having

the

sameproperties

(X-Y

oscilloscope).

TheGM

5605

is,

therefore,extremelysuitable

for

displaying

the

relationshipbetween

two

quantities,

e.g.

frequency

and

phaserelationships.

Moreover,

voltages

canbe

displayed

asa

function

time

means

ofthe

incorporated

time-basegenerator.

Technical

data

Properties

expressed

numerical

values

for

which

tolerance

has

been

stated

are

guaranteed

nominal

mains

voltages

onthe

voltageadapter.

Numerical

values

without

tolerances

indicate

the

properties

ofthe

average

instrument

andare

only

given

forthe

information

ofthe

user.

Cathode-ray

tubecircuit

Tube

type

effective

screenarea

totalacceleratingvoltage

Graticule

amplifier

Type

Deflection

sensitivity

Frequencyresponse

Overshoot

Sweepexpansion

Input

inputsockets

inputresistance

inputcapacitance

maximum

permissible

input

voltage

d.c.

input

DH7-78

flat

screen(otherscreentypes

canbe

supplied)

6x 5 cm

(width

height)

1750V

8div.

div.

= 5.5mm)

d.c.

amplifier

adjustable

to8

calibratedvalues:

0.01-0.03-

0.1-0.3-1-3-10-30

V/div.

Tolerance:

±3%

Between

the

steps,

the

sensitivity

canbe

continu-

ouslyadjusted

ina

ratio

3.5

(uncalibrated).

0-200

kc/s

(—3

dB).

Viathe

capacitor

input

the

bandwidth

is:5

c/s-200

kc/s.

% for

pulseswith

a rise

time

25ns

3X the

useful

screenheight,

i.e.

1.5X

upwards

and

downwardsfrom

the

centre.

maximumexpansion

the

peaks

ofthe

signal

canbe

displayed

undistorted

means

ofthe

vertical

shift

control.

4-mm

plugsockets

500

pFin

position

"0.01

V/div."

ofthe

attenuator

switch

pFinthe

positions

"0.03"

and

"0.1

V/div."

pFinthe

otherpositions.

400

Vr.m.s.

Technical

data

Maximumpermissible

d.c.

voltage

atthe

a.c.

input

time

ofthe

capacitorinput

amplifier

Type

Deflectionsensitivity

Response

curve

Overshoot

Sweepexpansion

Input

inputsockets

inputresistance

input

capacitance

maximumpermissible

input

voltage

d.c.

input

Maximumpermissible

d.c,voltage

onthe

a.c.

input

time

ofthe

capacitorinput

Phase

difference

ofthe

amplifiers

Phase

difference

Time

base

generator

Sweeptimes

Mode

operation

300V

d.c.

amplifier

adjustable

to7

calibratedvalues:

0.03-0.1-

0.3-1-3-10-30

V/div.

Tolerance:

±3%

Between

the

steps,

the

sensitivity

canbe

continu-

ously

adjusted

ina

ratio

3.5

(uncalibrated).

0-200

kc/s

(—

dB).

Viathe

capacitor

input

the

bandwidth

is:5

c/s-200

kc/s.

% for

pulseswith

risetime

25ns.

3x the

useful

screenwidth,

i.e.

1.5x tothe

left

andtothe

right

from

the

centre.

maximumexpansion

the

peaks

ofthe

signal

canbe

displayedundistorted

means

ofthe

horizontal

shift

control.

4-mm

plug

sockets

500

pFin

position

"0.03

V/div"

ofthe

attenuator

switch

pFinthe

position

"0.1

V/div."

pFinthe

other

positions.

400

Vr.m.s.

300V

50ms

5°for

frequencies

0-200

kc/s,

provided

that

thetwo

continuousattenuatorcontrols

are

adjusted

xI".

adjustable

in12

steps

from

fxs/div.

to100

ms/div.

ata

timebaselength

of10

divisions,

triggered

Accessories

Triggering

internal

external

requiredpicture

height

forin-0.5

division

for

frequencies

of5

c/s-200kc/s.

ternaltriggering

0.5

Vp-p

for

frequencies

of5

c/s-200kc/s.

The

maximum

voltageamounts

to10

Vp_p

(in

view

crosstalk).

MO//20

requiredvoltage

for

external

triggering

inputimpedance

socket

"EXT.TRIGG."

Supply

Mains

voltage

Influence

mains-voltagevari-

ations

of± 10%

Mechanical

data

Dimensions

Weight

voltageadapter

for

110-125-145-200-220

and245V.The

mainsfrequency

may

range

from

40-100

c/s

(mainsfrequencies

< 50c/s

only

nominal

mains

voltage).

Powerconsumption

SOW.

TheY andX

deflectionsensitivitychanges

inversely

proportional

tothe

mainsvoltage.

height

25cm

width

16cm

depth

35cm

10kg

Accessories

III

mains

flex

manual

test

cables

DIRECTIONS

FORUSE

AND

APPLICATIONS

Installation

ADJUSTING

TOTHE

LOCAL

MAINS

VOLTAGE

The

apparatus

canbe

adjusted

mainsvoltages

110-125-145-

200-220

and245V by

means

ofa

voltage

adapter.

The

adjustedvalue

canbe

readthrough

the

round

opening

inthe

rear

panel.

The

instrument

adjusted

anothermainsvoltage

follows.

Remove

the

cover

plate

atthe

rear

(Fig.

1).

Pull

the

adapter

outa

little,turn

until

the

correct

voltage

value

uppermost

and

then

press

the

adapterbackagain.

Refit

the

cover

plate.

Fig.

Adjusting

to the

local

mains

voltage

Indice

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