Instruction manual
Geratehandbuch
Mode
d'emploi
35 MHz Dual channel oscilloscope
35 MHz Zweikanal - Oszilloskop
Oscilloscope 35 MHz a double trace
PM 3218
9444 032
1
8.. 1
PHILIPS
9499 443 00102
)90625
IMPORTANT
In
correspondence concerning this instrument, please quote the type number and
serial
number
as given
on
the type plate.
WICHTIG
Bei Schriftwechsel uber dieses Gerat wird gebeten, die genaue
anzugeben. Diese befinden sich auf
dem
Typenbezeichnung und
Geratenummer
die
Leistungsschild.
IMPORTANT
RECHANGE DES PIECES DETACHEES
Dans votre correspondance
le
numero de type
Note:
et
!e
dans vos reclamations
numero de
The design of
Consequently,
contained
et
this
serie qui sont
instrument
this
in this
(Reparations)
is
instrument
se
rapportant a cet appareil, veuillez
marques
sur
la
subject to continuous development
may
TOUJOURS
indiquer
plaquette de caracteristiques.
and improvement.
incorporate minor changes in detail from the information
manual.
Bemerkung: Die Konstruktion und Schaltung dieses Gerats wird standig weiterentwickelt und verbessert.
Deswegen kann dieses Gerat von den in dieser Anieitung stehenden Angaben abweichen.
Remarques.
Cet appareil est
details
/
objet de developpements et ameliorations continuels.
mmeurs peuvent
differer des informations
donnees dans
la
En consequence certains
,
presente notice d'emploi
et d'entretien.
N.V. PHILIPS'
GLOEILAMPENFABRIEKEN - EINDHOVEN - THE NETHERLANDS PRINTED
IN
1979
THE NETHERLANDS
3
Contents
1.
GENERAL INFORMATION
9
1.1.
INTRODUCTION
9
1.2.
CHARACTERISTICS
10
1.2.1.
C.R.T.
10
1.2.2.
Vertical or Y-axis
10
1.2.3.
Horizontal or X-axis
11
Main time base
11
1.2.5.
Delayed time base
11
1.2.6.
X
12
1.2.7.
Triggering of the main time base
12
Triggering of the delayed time base
12
1.2.9.
Calibration generator
12
1.2.10.
Power supply
13
1.2.11.
Environmental characteristics
13
1.2.12.
Mechanical data
13
1.2.13.
Z-mod input
13
1.3.
ACCESSORIES
14
1.3.1.
Supplied with the instrument
14
1.3.2.
Optional
14
1.4.
BLOCK DIAGRAM DESCRIPTION
Y Channel
15
1.4.1.
1.4.2.
Main time-base triggering
15
1 .4.3.
Main time-base
15
1 .4.4.
Hold-off circuit
15
1.4.5.
Z-axis
15
1 .4.6.
Delayed time-base triggering
16
1.4.7.
Delayed time-base circuit
16
1.4.8.
Alternate time-base logic
16
1.4.9.
Power supply
16
2.
DIRECTIONS FOR USE
17
2.1.
INSTALLATION
17
2.1.1.
Safety regulations
17
2.1.2.
Local mains connection and fuse protection
17
2.1.3.
Connection to an external supply
18
2.1.4.
Front cover and instrument positions
18
2.2.
2.2.1.
CONTROLS AND SOCKETS
Cathode-ray tube and POWER
2.2.2.
Vertical channels
19
2.2.3.
Horizontal channel
19
1
1
.2.4.
.2.8.
Deflection
circuit
15
18
controls
18
2.2.4.
Main time-base generator
20
2.2.5.
Delayed time base generator
21
2.2.6.
Miscellaneous
21
2,3.
OPERATING INSTRUCTIONS
22
2.3.1.
Switching on the Instrument
22
2.3.2.
Preliminary settings of the controls
22
2.3.3.
Input coupling (AC/DC, 0)
22
4
2.3.4.
Use of probes
22
2.3.5.
23
2.3.6.
Adjustment of attenuator probes
Selection of chopped or alternate modes
2.3.7.
Differential
2.3.8.
Selection of trigger
2.3.9.
Triggering source
2.3.10.
Time-base magnifier
26
2.3.11.
Hold-off
26
2.3.12.
XY-measurements
26
2.3.13.
Using the delayed time base
26
2.4.
PROCEDURES REQUIRED FOR THE REMOVAL OF FUSES, BEZEL AND CONTRAST PLATE
27
24
mode
24
25
2.4.4.
Removing the instrument covers
Removing the mains transformer
Replacing the thermal fuse F101
Replacing the fuse F201
2.4.5.
Removing the
3.
SERVICE DATA
2.4.1.
2.4.2.
2.4.3.
23
mode
27
28
29
29
bezel and the contrast plate
29
75
FIGURES
1.1.
1
.2.
1.3.
2.1
.
35MHz
dual-channel oscilloscope
PM3218
9
Dimensions
1
Block diagram
14
Rear view of the oscilloscope showing the voltage adapter
set to
220 V
1
7
2.2.
Front view of the oscilloscope showing controls and sockets
18
2.3.
Adjusting an attenuator probe
23
2.4.
Suppression of
2.5.
Block diagram of composite trigger circuit
2
2.6.
Removing the instrument covers and the carrying handle
27
2.7.
Replacing the thermal fuse
2.8.
Replacing the thermal fuse
28
28
2.9.
Removing the
29
common mode
signals
bezel and the contrast plate
24
5
5
Inhait
1.
ALLGEMEINES
31
1.1.
EINLEITUNG
31
1.2.
TECHNISCHE DATEN
1.2.1.
Elektronenstrahlrohre
1.2.2.
Vertikale Oder Y-Achse
1.2.3.
Horizontale Oder X-Achse
32
32
32
33
33
33
34
34
34
34
35
35
35
35
1.2.4.
Hauptzeitablenkung
1.2.5.
Verzogerte Zeitablenkung
1.2.6.
X-Ablenkung
1.2.7.
Triggerung der Hauptzeitablenkung
1.2.8.
Triggerung der verzogertenzeitablenkung
Kalibriergenerator
1.2.9.
1
.2.1 0.
Stromversorgung
1.2.11.
Einflussgrossen
1.2.12.
Mechanische Oaten
1.2.13.
Z-achsen steuerung
1.3.
ZUBEHOR
1.3.1.
Standardzubehor
1.3.2.
Wahizubehor
1.4.
BLOCKSCHALTBILDBESCHREIBUNG
1.4.1.
Y-Kanal
1.4.2.
Triggerung der Hauptzeitablenkung
1.4.3.
Haupzeitablenkschaltung
1.4.4.
Sperrschaltung
1.4.5.
Z-Achse
1
37
^"7
Triggerung der verzogerten Zeitablenkung
.4.6.
1.4.8.
Alternierende Zeitablenk-Logik
1.4.9.
Speisung
38
38
38
2.
GEBRAUCHSANLEITUNG
39
2.1.
INBETRIEBNAHME
2.1.1.
Sicherheitsvorschriften
2.1.2.
Ortlicher Netzanschluss
39
39
39
2.1.3.
Anschluss an eine externe Stromversorgung
2.1.4.
Abdeckhaube und
2.2.
BEDIENUNGSELEMENTE UND BUCHSEN
Schaltung der verzogerten Zeitablenkung
1.4.7.
und Sicherung
Betriebslage
Elektronenstrahlrohre und POWER-Einstellelemente
40
40
2.2.2.
Vertikale Kanale
41
2.2.3.
Horizontaler Kanal
41
2.2.4.
Hauptzeitablenkgenerator
2.2.5.
Verzogerter zeitablenkgenerator
2.2.6.
Verschiedenes
2.3.
BEDIENUNGSANLEITUNG
2.2.1
.
2.3.1.
Einschalten des Gerats
2.3.2.
Vorbereitende Einstellungen
2.3.3.
Eingangskopplung
42
42
43
44
44
44
44
6
2.3.4.
Anwendung von Messkopfen
44
2.3.5.
Einstellen der Abschwacher-Messkopfe
2.3.6.
Einstellen der geschoppten oder der alternierenden Darstellungsart
2.3.7.
Differentielie betriebsart
2.3.8.
Einstellen der Triggerart
45
45
46
46
2.3.9.
Triggerquelle
47
2.3.10.
Dehnung der Zeitablenkung
48
48
48
48
2.3.11.
Einstellen der Sperrzeit
2.3.12.
XY
2.3.13.
messungen
Gebrauch der verzogerten zeitablenkung
2.3.11.
XY
48
48
2.3.12.
messungen
Gebrauch der verzogerten zeitablenkung
2.4.
VERFAHREN ZUM ENTFERNEN VON SICHERUNGEN, BILDROHRENRAHMEN UNO KONTRAST-
2.4.1.
Abnehmen
2.4.2.
Ausbau des Netztransformators
49
49
50
2.4.3.
Ersetzen der Schmelzsicherung FI 01
51
2.4.4.
Ersetzen der Sicherung F201
51
2.4.5.
Abnehmen
3.
SERVICE OATEN
PLATTE
der
Abdeckhauben
des Bildrohrenrahmens
und der Kontrastplatte
51
75
(nur aufs Englisch)
ABBILDUNGEN
1.1.
1.2.
2.1
.
2.2.
35 MHz Zweikanal-Oszillograf PM3218
Abmessungen
Riickansicht des Oszillografen mit Spannungsumschalter in
220 V Stellung
Vorderansicht des Oszillografen mit Bedienungsorganen und Buchsen
Abschwacher-Messkopfs
2.3.
Einstellen des
2.4.
Gleichtaktunterdruckung
2.5.
Blockschaltbild der zusammengesetzte (composite) Triggerschaltung
2.6.
Abnehmen
2.7.
Ersetzen der Schmelzsicherung
der Geratabdeckhauben und des Tragbiigels
2.8.
Ersetzen der Schmelzsicherung
2.9.
Abnehmen
des Bildrohrenrahmens
49
50
50
und der Kontrastplatte
51
7
Table des matieres
1.
GENERALITES
53
1.1.
INTRODUCTION
53
1.2.
CARACTERISTIQUES
54
1.2.1.
54
1.2.3.
Tube cathodique
Axe vertical ou Y
Axe X ou horizontal
1.2.4.
Base de temps principale
55
1.2.2.
54
55
1.2.5.
Base de temps retardee
55
1.2.6.
Deviation
X
56
1.2.7.
1.2.8.
Declenchement de
Declenchement de
la
base de temps principale
56
la
base de temps retardee
56
1.2.9.
Generateur d'etalonnage
1.2.10.
Alimentation
57
1.2.11.
Conditions ambiantes
57
1.2.12.
Caracteristiques mecaniques
57
1.2.13.
Entree modulation-Z
57
1.3.
ACCESSOIRES
58
1.3.1.
Fournis avec Tinstrument
58
1.3.2.
En option
58
DESCRIPTION DU SCHEMA SYNOPTIQUE
Y
59
1.4.
1.4.1.
57
Voie
1.4.2.
Declenchement de
1.4.3.
Circuit de base de
1.4.4.
Circuit de blocage
1.4.5.
Axe Z
1.4.6.
Declenchement de
la
base de temps principale
temps principale
59
59
59
59
59
la
base de temps retardee
temps retardee
60
60
1.4.7.
Circuit de base de
1.4.8.
Logique de base de temps alternee
60
1.4.9.
Alimentation
60
2.
MODE D'EMPLOl
61
2.1.
INSTALLATION
61
2.1.1.
Reglements de securite
2.1.2.
Branchement
sur
le
2.1.3.
Branchement
sur
une alimentation exterieure
2.1.4.
Couvercle avant et position de ^instrument
62
62
61
secteur et fusibles
61
62
2.2.
COMMANDES ET PRISES
2.2.1.
Tube cathodique
2.2.2.
Deviation verticale
63
2.2.3.
Deviation horizontale
63
2.2.4.
Generateur de base de temps principale
64
2.2.5.
Generateur de base de temps retardee
2.2.6.
Divers
65
65
et
commandes de
puissance
62
2.3.
INSTRUCTIONS D'UTl LISATION
66
2.3.1.
MIse de Tinstrument en circuit
66
2.3.2.
Reglage preliminaire des
2.3.3.
Couplage d'entree
commandes
66
66
8
66
2.3.4.
Emplol des sondes
2.3.5.
Reglage des sondes attenuatrices
2.3.6.
Choix entre modes commute
2.3.7.
Mode
et alterne
67
67
68
differentiel
2.3.8.
Choix du mode de declenchement
2.3.9.
Source de declenchement
2.3.10.
Agrandisseur de base de temps
70
2.3.11.
Reglage de blocage
70
2.3.12.
Messures
2.3.13.
Utilisation de
XY
68
69
70
la
base de temps retardee
70
2.4.
PROCESSUS REQUIS A LA DEPOSE DE FUSIBLES, VISIERE ET PLAQUE DE CONTRASTE
71
2.4.1.
Depose des couvercles
71
2.4.2.
Depose du transformateur secteur
72
2.4.3.
73
2.4.4.
Remplacement d'un fusible thermique F101
Remplacement du fusible F201
2.4.5.
Depose de
3.
NOTICE DE SERVICE
la
vIsiSre et
de
la
plaque de contraste
(seulement en Anglais)
73
73
75
FIGURES
MHz
double trace PM321 8
1.1.
Oscilloscope 35
1.2.
Dimensions
58
2.1.
Vue arriere de I'oscilloscope avec carrousel en position 220 V
Vue avant de Toscilloscope montrant les commandes et douilles
61
2.2.
2.3.
Ajustage d'une sonde attenuatrice
67
2.4.
Rejection en
2.5.
Schema synoptique du
2.6.
Depose des couvercles
2.7.
Remplacement d'un fusible thermique
Remplacement d'un fusible thermique
Depose de la visiere et de la plaque de contraste
2.8.
2.9.
a
mode commun
de
62
68
circuit
et
53
la
de declenchement mixte
69
poignee de I'appareil
71
72
72
73
General information
INTRODUCTION
The 35
MHz dual-channel
facilitate its extensive
oscilloscope
PM 3218
is
a
compact, portable instrument, ergonomically designed to
measuring capabilities.
The instrument provides both
comprehensive triggering
a
delayed timebase with provision for alternate timebase displays,
including peak-to-peak Auto, DC coupling and automatic TV waveform
main and
facilities
a
display.
A
large
8x10 cm
screen with illuminated internal graticule lines makes for easier viewing, and a 10
kV
accelerating potential gives a high intensity trace with a well-defined spot.
power supply allows the frame ground to be directly connected to floating ground circuits
ground does not carry live potentials. By this means, interference by ground currents, as is
A double-insulated
provided that this
frequently experienced with grounded oscilloscopes,
is
also substantially reduced.
The wide range of applications enabled by the above features is further extended by a versatile power supply
that enables the instrument to be operated from different line voltages as well as from d.c. For field operation
an optional battery version
is
also available.
Warning: The frame ground (and the ground lead of the probe) must not be connected to
Fig.
1.1.
35 MHz duaFchannel
oscilloscope
PM32 18
live
potentials.
CHARACTERISTICS
This instrument has been designed and tested according to
has been supplied in a
which
shall
EC
I
Publication
348
for Class
...
instruments and
be followed by the purchaser to ensure safe operation and to retain the instrument
Properties expressed in numerical values with stated tolerances are guaranteed for
+5 ^C
II
safe condition. The present Instruction Manual contains information and warnings
+40 ®C
In a safe
condition.
ambient temperatures of
unless stated otherwise. Numerical values without tolerances are typical and represent the
characteristics of an average instrument.
The data apply
after a
warming-up period of 30 minutes.
Additional Information
Specification
Designation
C.R.T.
D14-125 GH/08
Type
Rectangular tube face, mesh type,
post accelerator, metal backed
phosphor.
Measuring area
8x10
Screen type
P31 (GH)
Total acceleration
10 kV
Graticule
Internal
Engravings
Centimetre divisions with
divisions
1
div. equals
cm
1
P7 (GM) optional
Cont. variable illumination
mm
subdivisions of 2
along
the central axes. Dotted
10% and 90%
lines indicate
of measuring lattice for
measurement of
rise
time.
Vertical or Y-axis
Display
modes
Channel
A
only
Channel B only
A
A
A
Channel B polarity
and B chopped
and B alternating
and B added
Normal or inverted
Response:
Frequency range
Rise time
Pulse aberrations
DC
AC
<
<
:
0
....
:
2
Hz
35 MHz (-3dB)
.... 35 MHz (-3dB)
10ns
±
3% (< 4%
Measured
pp)
applied
Deflection coefficients
2mV/DIV
Continuous control range
1
Deflection accuracy
± 3
Input impedance
1
Input
RC
Maximum
time
>
:
div.
amplitude and
>
1
ns.
1-2-5 sequence
%
pF
Coupling switch to
s
AC
permissible input
voltage
400 V,
Chopping frequency
%
d.c. +
ax. peak
500 kHz
Vertical positioning range
1
Dynamic range
24 divisions
Visible signal delay
> 2 divisions
>40 dB at MHz
C.M.R.R.
6
time of
2,5
MW20
0,1
10V/DIV
....
at
rise
in
A-B mode
6 divisions
At 10ns
After adjustment at dx. or low
1
frequencies
Cross talk between channels
-40
dB
or better at 10
Instability of the spot position:
Temperature
drift
<
0,3 div/hour
MHz
Both attenuators
in
the same setting
11
1.2.3
Horizontal or X-axis
Horizontal deflection can be obtained from either the Main time base or the Delayed time base or a combination of the two, or from the signal source selected for X-deflection. In this case
be displayed using A, B, the Ext input connector, or Line
Display
modes
— Main
— Main
as a signal
X-Y diagrams can
source for horizontal deflection.
time base
time base intensified
by delayed time base
— Main
time base and delayed
time base alternately displayed
— Delayed time base
— XY or XY/Y operation
X
deflection by:
—
—
—
Channel
A
signal
Channel B
signal
Signal applied to
EXT
connector of
main time base
—
1.2.4
Line frequency
Main time base
Automatic
Operation
Possibility of
in
automatic free-running
the absence of triggering signals
Triggered
Time
coefficients
0,5s/DIV
1
Coefficient error
±
Magnification
lOx
Max.
ak/DIV
1
-2-5
sequence
> 2,5
Continuous control range
:
0,1
3%
±
5%
including
effective time
10 ns/DIV
coefficient
Delayed time base
Operation
Delayed time base either
starts
Immediately after
delay time or
is
triggerable
after the delay time,
by the
selected delayed time base
trigger source
Time
1
ms/DIV-0,1
Continuous control range
1
:
Coefficient error
±
coefficients
Delay time
jLts/DlV
>2,5
3%
In steps variable
with main
time base.
Continuously variable with
10-turn potentiometer
between 0 x and 10 x the
time coefficient of the
main time base
Incremental delay time
accuracy
Delay time
0,5%
jitter
1
:
>
20.000
1
-2-5
sequence
xIO magnifier
12
Designation
1.2.6
X
Specification
Additional information
Deflection
Source
EXT^
EXT,
A, B,
As selected by
10 or LINE
If
Deflection coefficients
A or
As
B:
push-button
trigger source switch.
X DEFL.
is
depressed
by
selected
AMPL/DIV
EXTERNAL
0,2 DIV
EXT-^ 10 2V/DIV
LINE 8 divisions at nominal
:
:
line
voltage.
± 10 %
Deflection accuracy
Frequency range
DC: 0
....
MHz
1
(-3
dB)
over 6 divisions
1.2.7
Phase shift
<3°
Dynamic range
24 divisions
Triggering of the
100 kHz
at
<
100 kHz
main time base
Source
Ch. A, Ch. B, Composite,
External
Trigger
For frequencies
mode
10 and
line
Automatic, normal
AC
normal DC, TV-line
and
Trigger sensitivity
TV
frame
(DC
(DC
External
150 mV (DC
200 mV (DC
Ext. ^10 :1,5V
(DC
2V
(DC
Internal: 0,5 div
div
1
:
Triggering frequency range
MHz)
50 MHz)
5MHz)
50MHz)
5MHz)
50MHz)
> 50 MHz
>50 MHz
>50 MHz
AUTO: 20 Hz
AC: 5 Hz
DC: 0 Hz
Level range
5
AUTO:
Proportional to
peak-to-peak value of
trigger signal.
AC, DC: 16
3,2
trigg.,
div. at Internal
at external
and 32V
at ext.
- 10
Triggering slope
Positive or negative going
Input impedance
1
Maximum
1.2.8
V
MW/20
+ or
-i-or
+ or
—8
div
and
—1,6V
referenced to centre of screen
—16V
referenced to centre of screen
pF
permissible
input voltage
400 V,
Hold-off time
variable
d.c. + a.c.
peak
Triggering of the delayed time base
Source
chA, chB, Composite,
External,
MTB.
Other trigger specifications are identical to "triggering of the main time base" with the exception of the
modes EXT. ^ 10, TV and AUTO.
trigger
1.2.9
Calibration generator
Output voltage
1
Accuracy
±
Frequency
,2
Vpp
1%
2
kHz
Square wave
13
Designation
Specification
Additionai Information
Double insulated
Safety class
Power supply
1.2.10
AC
supply:
Nominal voltage range (on
110, 127, 220 or 240 Vac
line-mains voltage adaptor)
± 10 %
Nominal frequency range
50
Power consumption
30
DC
II,
400 Hz ± 10%
W max.
At nominal mains voltage
20-28
V dc
V
A
max.
22-27
Current consumption
1,1
Capacity to earth
185 pF
Floating input
with relaxed specifications
Measured with rubber feet on grounded
metal plate of
Measured 30
27 pF
of
.
2 11
.
.
EC 348
supply:
Voltage range
1
I
1
1
cm
m^
above grounded plate
m2
Environmental characteristics
The environmental data
are valid only
if
the instrument
is
checked
in
accordance with the
offical
checking
procedure. Details on these procedures and failure criteria are supplied on request by the PHILIPS
GLOEILAMPENFABRIEKEN, TEST AND MEASURING
DEPARTMENT, EINDHOVEN, THE NETHERLANDS.
organisation in your country, or by N.V. PHILIPS'
Ambient temperatures
+40°C
Rated range of use
+ 5°C
Operating
-10°C ...+55°C
Storage and transport
-40°C
...
...
+70°C
Altitude;
Non-operating to
m
15000 m
Humidity
21 days cyclic
Shock
30
Operating to
5000
(15000
ft)
(45000
ft)
heat
direction for a
Vibration
25°C — 40°C, R.H. 95%
sinewave shock of
half
g:
damp
Vibrations
in
1 1
ms
duration:
3 shocks per
total of 18 shocks
maximum of 15 min.
55 Hz and amplitude of 0.7mmpp and 49 max.
three directions with a
per direction, 5
—
acceleration.
Unit mounted on vibrafion table without shock absorbing material.
Electromagnetic interference
Meets
Safety
The
VDE
0871 and
isolation
VDE
0875 Grenzwertkiasse
between the oscilloscopes and
line fulfills
requirements of lEC 348 for metal encased class
1.2.12
B.
II
the safety
instruments.
Mechanical data
Dimensions:
445
335
Height
137
Weight
8,4 kg (18,5
Length
1.2.13.
mm
mm
mm
Width
Z-mod Input TTL compatible "0" blanks
display
Handle and controls excluded
Handle excluded
Feet excluded
lb)
approx.
"1" normal
intensity see chapter 3.6.
AMPL/DIV.
VAR
Fig. 1.3.
Block diagram
POS,
14
Fig.
Dimensions
1.2.
1.3.
ACCESSORIES
1.3.1.
Supplied with the instrument
Front cover
2
BNC
4
mm adaptor
2 Probes
Instruction manual
1.3.2.
Optional
PM
PM
PM
PM
PM
PM
PM
PM
PM
PM
PM
PM
PM
PM
PM
PM
8925
8925L
Passive probe set 10
8921
Passive probe set
1
:
1
(1 .5
8921 L
Passive probe set
1
:
1
(2.5
8940
8943
9355
8910
9380
Isolation amplifier
Oscilloscope camera
8971
Camera adaptor
8962
9366
8980
Collapsible viewing
Passive probe set 10
1:1,10:1
1
(1 .5
:
1
(2.5
:
1
650
MHz
FET-probe
Current probe
Polaroid anti-glare
filter
19" Rack mount adaptor
hood
Closed long type viewing hood
8901
Rechargeable battery pack 330
8991
Trolley
8992/01
Trimming
V
d,c./24
Accessory pouch
too! kit
See also Chapter 3.5.
MAT 323
and 100
m) 40 MHz
m) 40 MHz
m) 1 5 MHz
m) 15 MHz
:
"INFORMATION CONCERNING ACCESSORIES".
V
d.c.
15
1.4.
BLOCK DIAGRAM DESCRIPTION
1.4.1.
Y
(Fig. 1.3.)
Channel
The
vertical channels
A
signals to be displayed are identical, each
and B for the
comprising an input coupling
switch, an input step attenuator, an impedance converter and a preamplifier with trigger pick-off.
A
channel multivibrator, controlled by the display
mode pushbuttons,
switches either channel
operated by
A
or channel B
the end of the
Y amplifier via the delay line. The channel multivibrator is
sweep, and offers an uninterrupted display of the A and B waveforms in the ALT mode. In the ADD position,
both switching amplifiers couple the signals through, thus adding channels A and B. By inverting the B channel
to the final
amplifier
(PULL TO INVERT
B) the
The AMPL/DIV switches provide x
with the step attenuator a
1.4.2.
full
A-
1
B
mode
is
a pulse at
obtained.
or x 10 gain control of the preamplifier, which offers in conjunction
range of deflection coefficients In a 1-2-5 sequence.
Main time base triggering
To
sweeps, trigger signals can be derived from the
initiate
A
and B
vertical
channel preamplifiers, from an
external source, or internally from the mains supply (LINE triggering) as selected by the trigger source switch.
Composite triggering (A and B depressed) is derived from the delay -line driver stage. The polarity of the trigger
signal, negative or positive-going, on which the display will start is determined by changing the output polarity
of the impedance converter.
With the
AUTO
switch depressed, the peak-to-peak
of the signal then determines the range of the
With
AC
In the
or
DC
depressed, the range of the
TVL
and
TVF modes
circuit,
1 .4.3.
the
LEVEL
thus initiating sweeps with
Main time base
level
LEVEL
LEVEL
control
is
detector comes into operation. The peak-to-peak
control
is
fixed.
TV
inoperative and the
or frame pulses depending
line
level
control.
on
sync separator
the setting of the
is
TVL
switched into
and
TVF
switches.
circuit
For normal internal time base operation the horizontal amplifier is fed by sweeps from the time base circuit.
AUTO depressed, in the absence of trigger signals, the output of the sweep generator is fed back via the
With
hold-off circuit and gate to
its
input. This causes sweeps to free-run and a resultant trace
is
displayed on the
logic)
As soon as the AUTO control circuit detects a trigger (i.e. a change in the output of the sweep-gating
the sweep is fed back to the sweep-gating logic. This causes the circuit to revert to the normal triggering
mode
in
screen.
With
AC
which sweeps are
or
DC
trigger signal
is
initiated only
depressed,
AUTO
present and the
by
control
LEVEL
is
trigger pulses at the input of the sweep-gating logic.
made
inoperative.
The display can be magnified in the horizontal direction by
factor of xlO (also the X DEFL mode).
When
the
X DEFL pushbutton
the final amplifier
way, the
is
Sweeps
produced provided
a
increasing the gain of the final amplifier by a
of the horizontal selection switch
inhibited and the
are then only
control appropriately set.
impedance converter
is
is
depressed, the sweep generator output to
connected directly to the
signals normally selected for triggering, or an external source,
can
now
final amplifier. In this
be used for horizontal
deflection.
1.4.4.
Hold-off circuit
The hold-off
stage, as
its
name
trace has completely returned and the time base circuits
decreased by turning the
1.4.5.
from the input of the time base circuit until the
are completely reset. The hold-off time can be
implies, ”holds-off" triggers
HOLD-OFF
control clockwise.
ZAxIs
The Z amplifier provides for the blanking of the trace during the fly-back and hold-off time. In addition, it
blanks the sweep in the CHOP mode during the switching transients. More over the trace can be blanked by a
signal applied to the external Z-mod input. The l.f. components of the blanking signal are modulated and
demodulated before they are applied to the Wehnelt cylinder together with the a.c. coupled h.f. components.
16
1.4.6.
Delayed time base triggering
To
sweeps, trigger signals can be derived from the
initiate
A
and B
vertical
channel preamplifiers, or from an
external source as selected by the trigger source push button switch.
A and
WFth both the
line driver stage
B pushbuttons depressed simultaneously, composite triggering
Y
of the
amplifier channel.
AC
and
DC
polarity of the trigger signal, negative or positive-going,
coupling
MTB
is
derived from the delay-
provided to the Impedance converter. The
on which the display
SLOPE
changing the output polarity of the impedance converter by the
With
is
will start,
is
determined by
switch.
selected, the delayed time base starts directly after the delay time.
The
DELAY TIME
control in
conjunction with the comparator determines the delay time for the delayed time base generator.
1.4.7.
Delayed time base circuit
The delayed time base
operative unless
Is
after the delay time, or
upon
its
TIME/DIV
switch
in
is
the
OFF
position.
It
starts
immediately
receipt of the first trigger pulse after the delay time.
The sawtooth signal derived from the main time base sweep generator is passed to a comparator where
compared with an accurately adjustable d.c. voltage, controlled by the DELAY TIME control.
The comparator output
pulse-shaped and provides the required delay pulse for the sweep-gating logic of the
Is
delayed time base generator.
The delayed sweep is
the main time base.
It
it is
A
sawtooth voltage
by the hold-off
reset
is
then initiated.
circuit of the delayed time base (end of the
sweep detection) or by
can be started again by the output signal of the comparator after the Initiation of the next main time base
sweep.
1.4.8.
When pushbutton MTB
of the horizontal deflection
with the delayed sweep
is
mode
controls
is
selected, the part of the trace coinciding
intensified.
Alternate time base logic
In
ALT TB mode
alternately traced
an electronic switch enables main time base display and delayed time base display to be
on the
screen.
The two displays can be separated by varying the voltage applied
driving circuits of the electronic switch. This separation
SEPARATION
In the
to the vertical amplifier, derived
from the
TRACE
is
symmetrically variable by means of the
Is
controlled by a signal derived from the electronic
control on the front panel.
ALT TB mode
the vertical channel multivibrator
switch.
In the vertical
1.4.9.
ALT modes, successively are displayed on the screen, Channel A and main
and delayed time base, Channel B and main time base, Channel B and delayed time base.
and horizontal
time base, Channel
A
Power supply
The mains
When
(line)
supply
the instrument
is
is
transformed and rectified before being applied to
operated from
a battery supply, the battery
output
a d.c. to a.c. converter.
is
connected directly to the
d.c.
to a.c. converter.
The output
— 1.5 kV
of the regulator
is
coupled to
a
transformer and rectifier which, after rectification, provides the
potential and the circuit supply voltages.
required total accelerating voltage of
^
10 kV.
The -1.5 kV
is
also multiplied to 8.5
kV
to supply the
17
2.
Directions for use
2.1
INSTALLATION
2.1.1
Safety regulations
(in
accordance with lEC 348)
Before connecting the instrument to the mains
to ascertain
whether any damage has occurred
instrument to the mains
check the cabinet, controls and connectors
any defects are apparent, do not connect the
(line), visually
in transit. If
etc.
(line).
The instrument must be disconnected from all voltage sources and any high voltage points discharged before
any maintenance or repair work is carried out. If adjustments or maintenance of the operating instrument
with covers removed is inevitable, it must be carried out only by a skilled person who is aware of the hazards
involved. In normal operation the double-insulated power supply obviates the need of a safety ground.
Warning:
must be borne in mind that in all measurements the frame ground of the oscilloscope is
raised to the same potential as that of the measuring ground probe connection. Neither the
It
probe's ground lead nor the frame ground shall be connected to
2.1 .2
live potentials.
Local mains (line) connection and fuse protection
Before connecting the instrument to the mains
delivery the instrument
is
set
to 220 V.
If
(line)
ensure that
the instrument
is
it is
set to the local
to be used with
1
10 V,
1
mains
27
V
(line) voltage.
or
On
240 V supply,
the appropriate voltage should be selected by turning the adaptor on the rear panel to indicate the voltage
required (see Fig. 2.1
The instrument
windings.
It
is
)
protected from overloads by a thermal fuse fitted between the mains
can be replaced after having removed the instrument rear panel
(line)
(see section 2.4.)
MAT 315
Fig. 2. 7.
Rear view of the oscilloscope showing the voltage adapter set
to
220
V.
transformer
18
2.1.3
Connection to an external supply
An
external supply or battery of 22
socket on the rear panel.
V
to 27
V
(DC Power input cord
capable of delivering at least
set:
1
A
can be connected to the
4822 321 20125).
The inner conductor must be connected to the negative pole and the outer conductor to the positive pole, as
indicated on the rear panel.
The instrument is protected against overloads and reversed polarity by an interna! fuse and diode. This fuse
can be replaced after having removed the instrument rear panel
2.1.4
(see section 2.4.).
Front cover and instrument position
The front cover can be simply removed by pulling it from the front.
The instrument may be used horizontally or in several sloping positions by using the carrying handle
as a
tilting bracket.
To unlock
the handle, simultaneously push
2.2
CONTROLS AND SOCKETS
2.2.1
Cathode-ray tube and
ILLUM
POWER ON
POWER
in
both pivot centre knobs.
(Refer to Fig. 2.2)
controls
Continuously variable control of the graticule illumination;
incorporates mains (line) switch. POWER ON pilot lamp indicates
the
ON
state.
INTENS
Continuously variable control of the trace
FOCUS
Allows beam to be focused for minimum spot
TRACE ROTATION
Screwdriver adjustment to align the trace with the horizontal
brilliance.
size.
graticule lines.
MAT
Fig. 2.2,
Front view of the oscilloscope showing controls and sockets.
313
19
2.2.2
Vertical channels
Display
Function
mode switch
A - ALT - CHOP - ADD -
B
5-way pushbutton switch selecting the
With
A
all
ALT mode
buttons released, the
Vertical deflection
is
vertical display
is
in
mode.
operation.
achieved by the signal connected to the input
of channel A.
The display
end of every cycle of the timebase
at the
CHOP
The
switched over from one vertical channel to the other
is
display
signal.
switched over from one vertical channel to the other
is
at a fixed frequency, (f
^
500 kHz)
sum
A
and B,
ADD
Vertical deflection
is
achieved by the
B
Vertical deflection
is
achieved by the signal connected to the input
channels
signal of
of channel B.
PULL TO INVERT
B
(outer-knob)
pulled, channel B signal
Step control of the
(centre-knob)
is
inverted.
vertical deflection coefficients, ranging
2 mV/div up to 10 V/div
AMPL/DIV
in a
1
Continuously variable control of the
centre-knob switched to the
from
-2-5 sequence.
Note that the deflection coefficient
Input coupling switch
of the display.
combined with the channel B POSITION control.
Push-pull switch
When
AMPL/DIV
vertical shift
Continuously variable controls giving
POSITION
CAL
vertical deflection coefficients.
is
calibrated only with the
position (fully-clockwise).
2-way pushbutton switch
Signal coupling;
AC/DC - 0
AC
(depressed)
Coupling
DC
(released)
Direct coupling
blocking capacitor
via a
Connection between input
0 (depressed)
the input circuit
and input socket
circuit
is
Interrupted and
grounded.
A
(1M^2//20pF)
BNC
socket for channel
B (1Mn//20pF)
BNC
socket for channel B input
A
2.2.3
is
input
Horizontal channel
X deflection source switch
MTB-XDEFL
DTB
^ALT TB—
Function
DTB
The horizontal deflection voltage
Horizontal-deflection controls; 3-way pushbutton switch
is
supplied by the delayed time-
base generator.
MTB
The horizontal
generator.
timebase
A
Is
deflection voltage
is
supplied by the main timebase
intensified
when
the delayed
running.
The delayed timebase generator
DELD TIME/DIV
If
is
portion of the trace
no buttons
switch
is
is
in the
switched off
OFF
are depressed the effect
depressed (only the
MTB LEVEL
is
when
the
position.
the same as the
control
is
MTB
button
not operating in this
situation).
DTB
I- ALT
MTB
TB—
When
both the
DTB
and
MTB
pushbuttons are selected simultaneously,
the horizontal deflection voltage
is
supplied i>y the main and delayed
timebases alternately.
X DEFL
Horizontal deflection
signal, the
is
achieved by the channel
mainsfrequency
A
signal,
the channel B
signal or an external signal applied to the
external input socket of the main time base.
20
X POS/X
MAGN
Continuously variable control giving horizontal
incorporates a push-pull switch,
PULL FOR
shift of the display;
x 10, which increases
The
the horizontal deflection coefficient by a factor of 10.
magnifier
TRACE SEP
is
also operative
deflection signal
is
used.
between the two
vertical space
ALT.TB mode.
the
in
X
an external
Continuously variable control of the
time-base displays
2.2.4
If
Main time base generator
LEVEL
SLOPE (IN +,OUT-)
Continuously variable control to select the
which the timebase generator
signal at
This control incorporates
a
level of
the triggering
starts.
push-pull switch, which enables choice
of triggering on the positive or negative-going edge of the triggering
signal.
For
TV
triggering, select
+ for positive video
Trigger
mode
switch
AC - AUTO - DC
i-
Function
With
all
A trace
LEVEL
selecting the trigger
pushbuttons released
a fixed range of the
AUTO
and
for negative video signals
signals.
3-way pushbutton switch
tvl-jltvf-j
—
is
LEVEL
AUTO
mode.
sweep mode
is
operation at
in
control.
displayed in the absence of trigger signals. The range of the
control
is
proportional to the peak-to-peak value of the
triggering signal.
AC
Normal
DC
Normal
LEVEL
triggering and fixed range of the
component
of the trigger signal
triggering
component
is
LEVEL
and fixed range of the
of the trigger signal
AUTO
AC
'-tvl-'
Line synchronisation
AUTO DC
Frame synchronisation
is
is
control.
The DC
control.
The DC
blocked.
passed.
obtained.
is
obtained.
1-TVF-I
HOLD OFF
Continuously variable control of hold-off time
Trigger source switch
Function
A
-
B-EXT
L-COMP--J
- EXT^IO
LINE-J
4-way pushbutton switch
of horizontal deflection
for
if
selects the trigger source, (or the
X
deflection source switch
is
source
depressed
X DEFL).
With
all
pushbuttons released, the effect
is
A
the same as the
button depressed.
A
A
Signal derived
from channel
B
Signal derived
from channel B
A
B
Composite
i-COMP-l
signal, derived after the electronic switch. Triggering
occurs on the displayed waveforms (not usable with
EXT and EXT^IO
External signal derived via the adjacent
LINE (MAINS)
Signal derived
Instrument
TIME/DIV
(outer switch)
is
from the
1
Mn//20pF
line (mains) voltage.
X DEFL).
socket.
(Inoperable
when
battery-powered).
Selects the time coefficient
from
.1
/Lis/div
to
.5 s/div in a
1-2-5
sequence.
TIME/DIV
(inner knob)
Continuously variable control of the time coefficients. Must be
switched to
CAL
position
(i.e.
fully clockwise) for the
be calibrated according to the indication of the
1
MO
- 20 pF
BNC
time axis to
TIME/DIV
socket for external triggering or horizontal deflection.
switch.
21
Delayed time base generator
LEVEL
SLOPE (IN
+,
OUT-)
Continuously variable control to select over a fixed range the level
of the triggering signal at which the time base generator starts.
This control incorporates a push-pull switch, which enables choice
of triggering on the positive or negative going edge of the triggering
signal.
Trigger
mode switch
Function
mode
AC - DC
2-way pushbutton switch selecting the
AC
Normal triggering and fixed range of the LEVEL control. The DC
component of the trigger signal is blocked.
DC
Normal triggering and fixed range
component of the trigger signal is
of
trigger
LEVEL
control.
The DC
passed.
DELAY TIME
Continuously variable vernier control of the delay time, together
with the TIME/DIV controls of the main time base generator.
Trigger source switch
Function
A -
B
- EXT - MTB
4-way pushbutton switch
selects the trigger source
point of delayed time base.
LcOMpJ
effect as the
A
MTB
and
No pushbutton depressed
starting
has the same
button depressed.
Internal triggering
Signal derived from channel A.
Internal triggering
B
Signal derived
A
Composite
B
from channel
B.
signal, derived after the electronic
channel switch.
Triggering occurs on the displayed waveform, after selected delay
*-COMP>J
time.
Triggering on an external signal connected to the adjacent
EXT
1Mr2//20pF socket.
MTB
Internal triggering signal derived
from the main time base to
start
the delayed time base immediately after the selected delay time.
TIME/DIV
(outer switch)
Selects the time coefficient
sequence. Incorporates an
time base generator
TIME/DIV
(inner knob)
is
from
OFF
switched
.1
/is/div to
ms/div
in a 1-2-5
off.
Continuously variable control of the time coefficients. Must be
the CAL position (i.e. fully clockwise) for the time axis to be
calibrated according to the indication of the
BNC
1Mn-20 pF
1
position by which the delayed
TIME/DIV
in
switch.
socket for external triggering signal.
Miscellaneous
Output socket supplying squarewave voltage ~ 2 kHz at an amplitude
of 1.2 V p-p ± 1% To be used for probe compensation and/or
CAL
.
checking
DC POWER
vertical deflection accuracy.
input socket at the rear of the instrument allows operation by an
V to 27 V, current
IN
external d.c. supply. Rated supply voltage 22
capability
LINE (MAINS)
VOLTAGE
Must be
>
lA.
set according to section 2.1.2 before the
ADAPTOR
connected to the
Z-MOD
See chapter 3.6.
local
mains voltage.
instrument
is
22
2.3
OPERATING INSTRUCTIONS
2.3.1
Switching on the instrument
Before connecting the instrument to any supply, the instructions given
in
section 2.1 Installation, should be
carefully carried out.
The oscilloscope will meet specifications (see section 1.2) normally after a warming-up period of approximately
15 minutes. However, if the instrument has been subjected to an extremely cold environment (e.g. left in a
car overnight in freezing conditions)
and
is
then brought
in
for use in a
warm room,
a
warming-up period of
sufficient length should be allowed (see 1.2.11).
2.3.2
Preliminary settings of the controls
This procedure
a general indication of
is
able starting point before any
whether the oscilloscope
measurements
is
functioning correctly and provides a suit-
made.
are
Refer to Fig. 2.2 for location of controls.
INTENS
Set
Depress
AUTO
switch. With
FOCUS
and
all
controls
in
mid position.
and select an average time coefficient between 10 ^s/div and 10 ms/div with the TIME/DIV
other pushbuttons normal (not depressed) channel A and channel B traces can be positioned
on the screen with the relevant POSITION controls. Set the
ness
2.3.3
and adjust
FOCUS
INTENS
control for a display of
medium
bright-
control for well focused traces.
Input coupling (AC/DC, 0)
AC
coupling (pushbutton depressed)
is
useful to block the d.c.
component of
a signal.
Choice of
AC
limits the
lower frequencies, causing low repetition rate sinewave signals to be attenuated and low repetition rate square-
waves to be distorted. The degree of attenuation
extended by 10
When
if
is
determined by the input
RC
time (0.1s). Input
RC
time
is
10:1 passive probes are employed.
switching to
AC
coupling
it
will take
approximately
five input
RC
times before the trace
is
stabilised to
the average value of the input signal.
AC
position measurements cannot be
made with
respect to ground.
0 position disconnects input source and short-circuits input of amplifier to provide zero signal check.
DC
2.3.4
coupling (pushbutton released) provides for
full
range frequency input,
i.e.
down
to d.c.
Use of probes
1
:1
passive probes should only be used for d.c.
and low frequencies.
Capacitive loading attenuates high frequencies or increases the rise-time of
measurement
signals
(dependent on
source Impedance).
10:1 passive probes have
especially
limit of the oscilloscope
10:1 passive probes
or
less
capacitive loading; usually about
when measurements
amplitude errors
are to be taken
lOpF
from high impedance
to
20pF. FET probes are superior,
test points or at the
upper frequency
bandwidth.
must be properly compensated before
use. Incorrect
compensation leads to pulse distortion
at high frequencies.
For correct adjustment, the
CAL
output connection can be used
(see Fig. 2.3.)
23
2.3.5.
Adjustment of attenuator probes
—
-
Connect the compensation box to socket A and place the tip of the probe on socket CAL.
Insert a small screwdriver through the hole in the compensation box and adjust the trimmer to obtain
correct display as
shown
a
in Fig. 2.3.
under
compensated
over
compensated
correct
MA8329
Fig. 2.3.
2.3.6.
Adjusting an attenuator probe
Selection of
(A
In
chopped or alternate modes
ALT CHOP ADD
B)
dual channel operations
(CHOP
or
ALT depressed)
the chopped
mode
(depress
CHOP) must be
selected for
relatively slow sweep speeds (from .1 ms/div to .5 s/div) or at low repetition rates of sweeps occuring, even at
high sweep rates. Selection of the ALTernate mode under these circumstances would make comparisons
between waveforms difficult because traces would actually appear to be written one by one. However, when
is fast enough to be interrupted by the chopping frequency the alternate mode must be selected
ALT), usually at sweep rates faster than .1 ms/div.
the display
(depress
24
2.3.7.
mode
Differential
The
In
A — B mode
measurements where
signal lines carry substantial
common mode
To obtain
the degree of
common mode signals (e.g. hum) the differential mode
— B). The capability of the oscilloscope to
signals
is
CMR
by the
given
common mode
factor (see Fig. 2.4).
rejection as specified, channel
done by connecting both channels to the
This can be
tinuous controls with the
When
and pulling the channel B POSITION control.
out these signals and leave the remainder of interest (A
will cancel
suppress
ADD
can be selected by depressing
AMPL/DIV
CAL
minimum
switch for
minimum
and B gains must
first
be equalised.
deflection on the screen.
passive 10:1 probes are used a similar equalisation process
sating controls for
A
output connector, and adjusting one of the con-
recommended by
is
adjusting their
compen-
deflection.
As drawn here CMR
::
10
M A 9397
Suppress! on of
Fig. 2. 4.
2.3.8.
Selection of trigger
common
m ode signafs
mode
AUTO
DC)
LtVL-II- TVF-l
(AC
The
AUTO mode
Furthermore, for
is
most
useful because
of the position of the
provides trace(s) on the screen even in the absence of trigger signals,
it
amplitude larger than
a signal
LEVEL
control;
its
division, this
1
range
is
mode
provides stable triggering independently
automatically adjusted to the peak-to-peak value of the
signal selected for triggering.
In this
The
way
the setting of the
AUTO mode
In
DC
control
is
facilitated at small amplitudes of the trigger signal.
cannot be employed for signals with low repetition
would be able to free run
used (AC or
LEVEL
in
between
triggers.
rates (10
Hz
or lower) because the sweeps
Therefore, for low repetition signals normal triggering must be
depressed).
norma! triggering, sweeps are only initiated with
a trigger signal applied
and the
LEVEL
control set
appropriately.
With
AC or DC depressed the range of the LEVEL control
LEVEL control with respect to mid screen).
fixed
is
(-i-
-S
or
divisions or
more
at the
when
triggering
extremes
of the
The DC component
take place
With
AC
on
the trigger signal can be blocked by depressing AC. This
in
a.c. signals
superimposed on
useful
coupling, the level at which the display starts will change with alterations
trigger signal.
The
trigger level
waveforms that vary
Slope selection
is
in
is
thus no longer referenced to signal ground. This
made with pushbutton +/-.
No buttons depressed
range
is
time interval from cycle to cycle. Normally
+ for positive video signals.
LEVEL
is
fixed.
The
LEVEL
offers an extra
must
a large d.c. level.
In
control
mode
TV mode - must
Is
Inoperable
of use, a trace
is
in
it is
in the
may
average value of the
cause instability with
preferable to use the
DC
position.
be selected for negative video signals and
the
TV mode.
on screen
in
the absence of a trigger signal, but the
25
2 ^.9
.
Trigger sources
trigger sources
The main time base
A
>
i-COMP-J
—
— LINE
Internal triggering will be
TRIG
or
X DEFL
pushbuttons.
ext^io
ext
B
can be selected by the front-panel
*
most commonly used because
it
requires only one signal (the input signal) to
obtain stable triggering.
advantageous to use an external signal for triggering.
There Is no need to set and reset the trigger controls (LEVEL, SLOPE and SOURCE) on changing the input
waveforms.
signal. Furthermore the two A and B Inputs remain free for examining
—
External triggering.
—
frequency, always
Selection of trigger source. In comparing waveforms that are a multiple of each other's
lead to double
may
doing
so
Not
select the signal, that has the lowest repetition rate as the trigger source.
—
Composite
pictures (chopped
When
mode)
triggering.
Composite
1.
when
COMP
is
signals are
mode,
it is
When composite
there
is
selected by depressing both
it is
A
A
channel, the B channel
and B pushbuttons, from the delay
Line (mains) triggering
is
compare
possible to
triggering
trigger
useful
triggering
is
derived from the differential signal. Triggering
not necessary to switch trigger sources from
is
source
when
B or vice versa.
signals that are not related in time.
is
A
or
B input), stable
also switched from
the signal input
Channel B triggering
Block diagram of composite
A to
is
employed in dual channel operation (chopped or alternate), and
only one signal applied (to
normal since the
Fig. 2.5.
mode).
obtained from either the
follows the electronic channel switch.
For one channel operation
3. In the alternate
—
it is
or untrue time-shifts (alternate
mode (A - B measurements)
by common mode signals.
In differential
Note:
signals
triggering offers three advantages:
not disturbed
2.
many
With Internal triggering
preamplifier stages or,
line driver stage that
tracing
trigger circuit
is
A
mains
triggering
to
B
(line)
cannot be obtained. This
(see Fig. 2.5).
frequency related.
Composite triggering
is
only
26
2.3.10.
Time^base magnifier
The magnifier
When
operated by pulling the switch incorporated
is
in
the
X
position control.
sweep speed is increased 10 times. The sweep time
therefore determined by dividing the indicated TIME/D IV value by 10.
2.3.11.
this switch
is
the
in
xIO
position, the time-base
is
Hold-off.
This control can be used to increase the sweep hold-off time.
2.3.12.
XY
Measurements
XY
measurements are made with the TIME/DIV switch
being selected by the
XY
TRIG
measurements provide
or
X DEFL pushbutton
at
EXT X DEFL, the source of horizontal
EXT, EXT H- 10 or LINE)
means of making frequency or phase
a useful
deflection
switch (A, B,
shift
comparisons by displaying
Lissa-
jous patterns.
Measurements can be made up to 100 kHz with
The
sensitivity for the different
X
2.3.13.
deflection
XY modes
is
shown
than 3° phase error between horizontal and vertical channels.
in
the following table:
Sensitivity
A
AMPL/DIV A ± 10%
B
AMPL/DIV B
EXT
0.2
EXT
less
10
2
LINE
±
10%
V/DIV
V/DIV
8 divisions
Using the Delayed time-base
The delayed time base can be used for the accurate study of complex signals. The delayed time base generator
starts (TIME/DIV switch not at OFF) after the selected delay time and the delayed signal is intensified when
the
The
MTB pushbutton of the horizontal deflection controls has been selected.
DELAY TIME potentiometer control enables the intensified portion to be
duration of the intensified portion,
TIME/DIV
controls
In
the
is
its
controls of the delayed time base generator.
When pushbutton DTB
depressed, the intensified portion occupies the
DTB
DELAY TIME
control.
is
full
The
by means of the
of the horizontal deflection
width of the screen.
the interval between the starting points of the main time base and
determined by the setting of the main time base TIME/DIV controls and the
position, the delay time
that of the delayed time base)
shifted along the time axis.
length, can be controlled in steps and continuously
The PM3218
(i.e.
is
equipped with display switching. This offers the instrument user a
simultaneous display of the signal on the two time scales provided by the main time base and by the delayed
time base.
By
selecting
ALT TB, detailed
expanding the time interval of
Expansion
is
examination of
portion of the main time base display
The part of the
signal
DELAY TIME
also serves as a visual indication of the
between
MTB
as
facilitates the location of the required detail
TIME/DIV
and DTB.
control
an intensified portion
during dialling, but
portion of the overall trace being examined. Selection of
enables immediate correlation of the detail with the overall signal, which
the need to switch
enabled by
potentiometer.
under detailed observation by the delayed time base also remains
main time base display. This not only
is
delayed time base.
achieved by selecting a correspondingly faster sweep for the delayed time base
and positioning the time interval by the
of the
a certain
interest, using the
may
ALT TB
thus
be extremely complex, without
27
2.4.
PROCEDURES REQUIRED FOR THE REMOVAL OF FUSES, BEZEL AND CONTRAST PLATE
2.4.1.
Removing the instrument covers
Always ensure that the mains supply is disconnected before removing any instrument cover plates.
The instrument is protected by three covers: a front panel protection cover, a wrap-around cover with carrying
handle, and a rear panel.
To facilitate removal of the wrap-around cover and the rear panel, first ensure that the front cover is in position.
Then proceed
—
—
—
—
—
-
as follows:
Hinge the carrying handle clear of the front cover; to this end, push both pivot centre buttons
Stand the instrument on its protective front cover on a flat surface.
Slacken the two coin-slot screws located on the rear panel.
Lift the rear panel
Lift off the
and unplug the connector on the power supply board.
wrap-around cover.
For access to the front-panel, stand the instrument horizontally and snap off the front cover.
Fig, 2.6.
Removing the instrument covers
(Fig. 2.6.).
28
2.4.2.
Removing the mains transformer
— Remove wrap-around cover and rear panel (section 2.4.1,).
— Take the lid off the voltage adapter compartment after removing the 4 cross-slotted screws.
— Remove the 4 cross-slotted screws that hold the lid of the transformer compartment.
— Lift the lid with the attached transformer, simultaneously sliding the wire form between transformer
voltage adapter out of the
— The
slit in
the transformer compartment.
transformer and thermal fuse are then accessible for replacement
THERMAL FUSE
THERMOSiCHERUNG
FUSIBLE THERMIQUE
Fig. 2. 7.
Fig. 2.8.
Replacing the thermal fuse
Replacing the thermal fuse
and
29
2.4.3.
Replacing the thermal fuse F101
- Remove the mains transformer (section 2.4.2.).
— Unsolder fuse terminals and 2 (Fig. 2.7. and 2.8.).
- Only the fuse wire of the old fuse is replaced and not
1
—
the fuse slightly outwards, disengage the locking pin and pull out the wire.
Take the new fuse and remove the fuse wire out of its housing in the same
Push the new fuse wire into the housing of the old one
in
—
2.4.4.
2.4.5.
the complete fuse; to this end, bend the housing of
the fuse wire must point to terminal
1.
and
2.
Solder the fuse wire to terminals
1
way
until the locking pin
as described
above.
snaps into the hole. The loop
Replacing the fuse F201
— Remove wrap-around cover and rear panel (section 2.4.1.).
— Fuse F201, which is located on the power supply printed circuit
Removing the
board,
is
accessible for replacement.
bezel and the contrast plate
- Take hold of the bezel's bottom corners and gently pull it from the front
- The contrast filter can be removed by pressing it gently out of the bezel.
Fig. 2.9.
now
Removing
the bezel
and the contrast plate
panel (Fig. 2.9.).
113
3.3.
INFORMATION FOR ASSISTENCE
3.3.1.
Mains transformer data
IN
FAULT FINDING
BALANCE
CHANNEL A
D.C.
The
available unloaded voltage tappings
diagram
3.3.2.
(Fig. 3.44) in the
Voltages and waveforms
in
form
and the number of turns per winding are
listed in
gain
GAIN X10
R504
of a table.
C502
CHANNEL A
the instrument
BALANCE
CHANNEL A
GAIN
The
d.c. voltage levels at
generators are
The
at the relevant points
on the
circuit
oscilloscope under test must be set in the following
in Fig.
—
—
—
—
—
“
—
—
—
—
—
—
—
—
—
—
shown
the electrodes of the transistors and the voltage waveforms
3.44 and
Display
X
mode
diagrams (Fig. 3.44,
way
Fig.
in
the time-base
3.45 and
to measure the voltage
Fig. 3.46).
wave forms
as
shown
Fig. 3.46.
switch SI to position
S3 to position "MTB''.
deflection selector switch
MTB trigger mode switch S4 to position ''AUTO'".
A POSITION potentiometer R2 at mid-range.
A AMPL/DIV switch S9 to V/div. and potentiometer R9 to CAL.
Input signal on A Input socket X2: 2,5 kHz sine-wave voltage for 8 div.
Z3B
=*1
D.C.
BALA
deflection.
=IM
GAIN BALANCE
CHANNEL
for measuring the diagrams 11-12-1 5-1 6-17-18c-18e and 19c.
SHIFT BAL
CHANNE
DTB TRIGGER
Remark
In case
When
of a defect
it
the instrument
is
is
always possible to apply to the world wide PHI LIPS Service Organization.
to be sent to a
PHILIPS
Service
Workshop
for repair, the following points should be
observed:
Attach
a label
with your name and address to the Instrument.
Give a complete description of the faults found, or the service required.
Use the original packing,
or,
if
this
is
no longer
available, carefully
pack the instrument
In a
wooden
crate
MTB TRIGGER
or box.
— Send
the instrument to the address obtained after consultation with the local
PHILIPS Organization.
B
R674
SENSITIVITY
—
—
—
R6
CHANT
19a en 19b.
3.3.3.
BALANCE
CHANNEL B
MTB LEVEL potentiometer R7 at mid-range.
DTB LEVEL potentiometer R5 at mid-range.
MTB SLOPE switch S8 in position
DTB SLOPE switch S6 in position
MTB TRIGGER source selector switch S22 to position "A".
DTB TRIGGER source selector switch S21 to position "A".
MTB TIME/DI V switch SI 5 to 0,2 ms/div. and potentiometer R 12 to CAL.
DTB Tl ME/DI V switch SI 3 to OFF for measuring the diagrams 1-2-3-4-5-6-7-8-9-10-1 3-1 4-1 8a-18b-18d/Lis/div.
E
NORMAL/
X POSITION potentiometer R6at mid-range.
X MAGN switch S7 to position "XI”.
switch SI 3 to 50
R
SHIFT
CHAr
1
— DTB TIME/DI V
XI
CHANNEI
the circuit
SENSITIVITY
113
CAL.
BALANCE
CHANNEL A
D.C.
L802
R519
R1607
^
GAIN X10
R504
C502
R 848
CHANNEL A
GAIN XI VERTICAL
FINAL AMPLIFIER
R514>
R 547
BALANCE
CHANNEL A
GAIN
m
m.
SHIFT BALANCE
CHANNEL A
D.C.
L801
\GAIN X1
A
y CHANNEL
*^^C
818
BALANCE
CHANNEL B
R 647
R 619
NORMAL/ INVERT
R604
C602
GAIN X10
BALANCE
CHANNEL
CHANNEL B
B
C1407
C 1406
R614
GAIN BALANCE
CHANNEL B
mi
"^21
R674
BALANCE
CHANNEL B
SHIFT
COMENSATION
R1107
DTB SWEEP TIME
X GAIN XI
DTB TRIGGER
SENSITIVITY
mi
R 1417
R1336
R1537
R
>e
X
mi'
te
tm
BRILLIANCE
R 1216
^
MTB
GAIN
X10
MTB
SWEEP
R1507
BRILLIANCE
RATIO
TIME
1016
TRIGGER
SENSITIVITY
—
1419
MULTIPLIER
SETTINGS
mi[
mi_
im'
MAT 353
Fig. 3. 19.
Adjusting elements amplifier board
114
34
.
34
.
.
.
1
.
114
f
3.4.
DISMANTLINGTHE INSTRUMENT
r
3.4.1.
General information
This section provides the dismantling procedures required for the removal of components during repair and
f
routine maintenance operations. All circuit boards removed from the oscilloscope should be adequately
protected against damage, and
all
During dismantling procedures,
normal precautions regarding the use of tools must be observed.
a careful
note of
all
leads disconnected
must be made
so that they
may
be
reconnected to their correct terminals during assembly.
f
I
Always ensure that the mains supply
Is
disconnected before removing any instrument cover
Damage may
is
switched on
plates.
^
board
is
result
if
the instrument
removed within one minute of switching
when
a circuit
board has been removed, or
if
a circuit
off the instrument.
f
3.4.2.
Removing the instrument covers
The Instrument
is
protected by three covers:
a
front panel protection cover, a wrap-around cover with carrying
handle, and a rear panel.
To
facilitate
removal of the wrap-around cover and the rear panel,
Then proceed
—
—
—
—
—
—
first
ensure that the front cover
is
in position.
as follows:
hinge the carrying handle clear of the front cover; to this end, push both pivot centre buttons (Fig. 3.20).
stand the Instrument on
its
protective front cover on a flat surface
slacken the two coin-slot screws located on
tfie rear
panel
lift
the rear panel and unplug the connector on the power supply board
lift
off the
wrap-around cover
for access to the front-panel, stand the instrument horizontally and snap off the front cover.
Fig. 3.20.
Removing the instrument
covers.
COMPONENT LOCATION
Item
Grid loc.
C101
rear panel
C200
C201
C202
C203
C204
C206
C207
C208
C209
C211 ^
power supply
power supply
power supply
power supply
power supply
power supply
power
power
power
power
C212
C213
C214
C216
supply
C221
C222
C223
C224
C226
C227
C228
C229
C231
C251
C252
C253
C254
C255
C256
C257
C258
C259
Item
Grid loc.
Item
Grid loc.
Item
C285
C286
D-3
Cl 007
C-5
Cl 509
G-4
E-2
Cl 008
C-5/D-5
att.
E-2
Cl 009
C-5
C305
C307
C308
C309
C310
att, unit
C-2
C1011
C-5
att.
unit
C521
E-2
C-5
att.
unit
F-2
att. unit
C522
C523
C-2
att. unit
C601
C-3
C1012
C1101
C1102
C1103
B4
C4
C-3
Cl 104
C-4
C-3
E-2
C1201
Cl 202
Cl 203
C1204
D-5
att. unit
C602
C603
C604
C607
C609
D-5
att.
unit
C611
D-3
Cl 205
D-5
att.
unit
E-3
Cl 206
E-5
C1511
C1512
C1601
Cl 602
C1651
C1652
Cl 653
C1654
C1655
C1656
C1657
C1658
Cl 659
Cl 660
G-5
C301
C517
C518
C519
C520
E-2
G-3
E-3
D4
R1
E-3
C1207
Cl 208
E-5
E-3
Cl 209
E-5
F-3
C1210
E4
C-3
E-5
E4
E-3
C1301
C1302
C1303
Cl 304
C1305
Cl 306
Cl 307
R2
R3
R4
R5
R6
R7
R8
R9
RIO
D-5/E-5
R11
R267
C-4
R268
D-4
R269
B-2/C-2
R271
B-3
D-3
R272
R273
att. unit
R274
B4
R276
C-3
D-4
R277
F4
R278
R279
G-3
R281
G-3
R302
att. unit
RSOSl
on switch
R304 ^
S9
R306/
R307
att. unit
R308
att. unit
R309
att. unit
R311
att. unit
R312
att. unit
on switch
R313'
R314 J
S9
R316^ att. unit
R317
att. unit
R318
att. unit
R319
att. unit
unit
att.
unit
supply
unit
supply
supply
C321
att. unit
supply
att.
unit
att.
unit
C621
E-3
att.
unit
F-3
att. unit
C622
C623
C-3
att.
unit
C701
E-3
supply
C322
C324
C351
C352
C353
C356
C613
C616
C617
C618
C619
C620
att.
unit
E-2
supply
C401
att.
unit
supply
C405
C407
C408
C409
C410
att.
unit
att.
unit
att. unit
C702
C703
C704
C705
C706
C707
att.
unit
att.
unit
supply
supply
supply
supply
supply
supply
C-2
D-2
C-3
D-3
att. unit
att.
unit
att. unit
att. unit
att.
att.
unit
unit
D-3
D-3
D4
F-2
C1310
C1311
C801
F-3
C1321
D-4
C802
C803
C804
C805
C806
C807
C808
C809
C810
F-3
E-4
R201
R202
C811
F-3
att.
unit
G-3
C422
C424
att.
unit
G-3
Cl 409
att.
unit
G-2
C451
att.
unit
att.
unit
B-3
C452
C453
att.
unit
D-3
C501
C-2
C812
C813
C814
C815
C816
C817
C818
C1411
C1412
C1413
C1414
C1416
C1417
C1501
E4
B-3
D4
D4
C4
C4
D4
C-2/C-3
J277
C278
C279
C280
att.
C281
D4
D4
unit
B4/B-5
B-3
att.
F4
G-2
unit
C502
C503
C504
C507
C509
unit
att.
unit
att. unit
att.
unit
att.
unit
att.
unit
C-2
C-2
D-2
D-2
E-2
C511
D-2
C513
E-2
>
E-2
att. unit
F-5
unit
E-5
R12
R13
R14
R15
R200
C421
D4
att.
E-4
C821
C1001
Cl 002
Cl 003
Cl 004
C1005
Cl 006
F-3
C1314
C1315
C1316
C1402
D-5
B-2
B-2
F-4
F-4
F-5
F-5
F-4
F-5
F-5
F-5
F-5
E-3
front panel
power
power
power
power
power
power
power
power
power
power
R251
B-2/C-2
G-2
R252
R253
R254
R256
R257
R258
R259
B-2/C-2
C-4
Cl 503
G-5
B-5
Cl 504
G-5
C-4/D-4
C1506
G4
C-4
Cl 507
G-5
Cl 508
G-5
!
R261
R262
R263
R264
R266
C-3
C-3
R701
C-3
E-3
F-2/G-2
E-2
R861
F-2
D-2
R611
C-3
E-2
D-2
R612
R613
R614
R616
R617
R618
R619
C-3
E-3
D-3
R702
R703
R704
R706
R707
R708
R709
C-3/D-3
R711
F-3
C-3/D-3
F-2
C-2/D-2
R621
C-3
C-2/D-2
D-3
D-3
D-3
R801
F-2
C-5
D-3
F-3
R1011
C-5
D-2
R631
D-3
D-2
R632
R633
R634
R635
R636
R637
R638
R639
D-3
R802
R803
R804
R806
R807
R809
F-3
D-2
R622
R623
R624
R626
R627
R628
R629
R712
R713
R714
R716
R717
R862
R863
R864
R866
R1001
R1002
R1003
R1004
R1006
R1007
R1008
R1009
D-3
R811
F-3
D-3
R812
R813
R814
R816
R817
R818
R819
F-3
R1012
R1013
R1014
R1016
R1017
R1018
R1019
R501
R502
C-2
C-2
C-2
D-2
G-3
G-5
C-3
C-2
R602
R603
R604
R606
R607
R608
R609
D-2
G-2
Cl 502
att. unit
R852
R853
R854
R856
R857
R858
R859
D-2
high t.u.
C-4
E-3/F-3
D-2
power supply
supply
B-3/C-3
B-3/C-3
C-3
D-3
att.
R851
R672
R673
R674
R676
R677
R521
R212
R227
G-5
E-3/F-3
C-3
unit
R211
G-2
R671
R601
att.
G-3
F-2
C-3
att. unit
unit
R403"]
1
E-3/E-4
R404
R406
R407
R408
R409
B-3
D-4
B-4
B-3
E-3/E-4
F-5
unit
unit
att.
unit
att.
unit
att.
unit
att.
unit
att.
unit
att.
unit
att.
unit
R522
R523
R524
R526
R527
R528
R529
att.
unit
R531
on switch
'
r
S11
J
att.
unit
att.
unit
att.
unit
R411
att.
unit
R412
att.
unit
unit
att. unit
unit
G-3
B-5
F-2
att. unit
R572
R573
R577
R600
att.
att.
att.
G-3
G-3
att. unit
att.
R362
R363
R364
R365
R366
R367
R368
R369
R374
R402
unit
E-3
G-3
R662
R663
R664
R668
R669
supply
att.
E-2
G-3
R571
R361
supply
D-3
G-3
att. unit
supply
Cl 407
G-2/G-3
E-3
E-3
att. unit
supply
C1408
G-2
E-3
F-2
D-2
E-3
R462
R463
R464
R466
R467
R468
R469
R500
att. unit
att. unit
C-2
G-3
F-2
E-2
E-2
F-3/G-3
G-3
R461
unit
R512
R513
R514
R516
R517
R518
R519
Cl 406
F-2
E-3
att.
unit
F-2
G-2/G-3
R661
unit
att.
G-3
F-2
E-2
att.
C-2
Cl 405
G-3
E-2
R652
R653
R654
R658
R659
R511
F-3
F-3
D-2
E-2
loc.
R552
R553
R554
R558
R559
R568
R569
att. unit
unit
G-3
F-5
F-3
R822
R823
R824
R825
R826
R827
R828
R829
R831
R832
R833
R837
R838
R839
R843
R847
R848
R849
att. unit
unit
unit
unit
R821
R651
att.
att.
unit
E-3
E-2
R646
R647
R648
R649
R650
D-3
D-3/E-3
E-2
unit
att.
att.
E-2
Grid
R551
att.
unit
att.
R641
Item
Grid loc.
unit
att. unit
att.
supply
R640
D-2
Item
att.
att. unit
unit
supply
D-2
loc.
R452
R453
R454
R456
R457
R458
R459
R416
R417
R418
R419
att.
supply
Grid
att. unit
S11
R414Jr
R352
R353
R354
R355
R356
R357
R358
R359
R360
supply
Item
R451
on switch
.
unit
supply
loc.
R542
R543
R546
R547
R548
R549
R550
R413^
att.
Cl 404
D4
Grid
R351
F-3
F-3
D-4
Item
R503
R504
R506
R507
R508
R509
R203
R204
R206
R207
R208
R209
R210
F-3
G-2
Grid loc.
t
E-5
C412
C413
C414
C415
C416
C417
C418
C419
C420
att.
D4
D-5
unit
B-4/B-5
D-4
on tube
'I
Cl 309
att.
B-3
D-5
C1308
C41
att. unit
E-5
E-3
unit
1
B-4
E-2
att.
E4
C282
C283
C284
Grid loc.
att.
unit
C262
C263
C266
C267
C268
C269
C272
C273
C274
Item
C311
tension
C261
C271
Grid loc.
C312
C313
C314
C315
C316
C317
C318
C319
C320
high
power
power
power
power
power
power
power
power
power
power
power
Item
supply
C2I7J
C218
C219
1
145
LIST
C-2
C-2
D-2
C-2
D-2
D-2
C-2/D-2
D-2
D-2
R532
R533
R534
R535
R536
R537
R538
R539
R540
D-2
R541
E-2
D-2
D-2
D-2
D-2
E-2
E-2
D-2/E-2
E-2
D-2
D-2
E-2
F-2
E-2
C-3
C-3
C-3
C-3
D-3
C-3/D-3
D-3
D-3
D-3
D-3
E-3
D-3/E-3
E-3
D-3/E-3
D-3
D-3
D-3
E-3
E-3
E-3
E-3
E-3
E-3
E-3
E-3
F-3
E-2/E-2
E-2/E-3
E-2/E-3
F-2
E-3
E-2
F-3
F-3
F-2
F-3
F-3
F-2/F-3
F-3
F-2
F-2
G-3
F-3
G-2
F-2
F-2
F-2
F-2
F-2
G-2
F-2
F-2
F-2
F-2
F-2
F-2
F-2/G^2
F-2
G-2
F-2/F-3
B-5
C-4
C-4
C-4
C-4
C-5
C-5
B-4
B-5
C-5
B4
C-5
C-4
C-5
G-3
R1021
C-5
F-3
R1022
R1023
R1024
C-4
F-3
F-3
F-2
F-3
C-4
C-4
146
Item
Grid loc.
R1026 C-5
R1027 C-5
R1028 C-5
R1029 C4
R1031 C4
R1032 C4
R1034 C-4
R1036 C4
R1037 C-5
R1038 C4
R1039 C4
R1041 C-4
R1042 C-5
R1043 C-5
R1044 C-5
R1046 C-5
R1047 C-5
R1048 C-5
R1049 C-5
R1051
R1052
R1101
R1102
R1103
R1104
R1106
R1107
R1108
R1109
Rim
C-5
C-5
B4
C-4
B4
B4
B4
B4
B4
C-4
C-4
R1112
R1113
R1114
R1116
R1117
R1118
R1119
C-4
R1121
C-4
R1122
C-4
C-4
C-4
C4
C4
C-4
C4
R1123
R1124
C-4
R1201
D-5
C-4
R1202 D-5
R1203 D-4
R1204 D-4
R1205 D-5
R1206 D-5
R1207 D-5
R1208 D-5
R1209 G-4
R1210 D-5
R1211
R1212
R1213
R1214
R1216
R1217
E-5
E-5
E-4
E-4
E-4
D-5
Item
Grid loc.
Item
Grid
R1218
R1219
D-5
R1344
R1346
R1347
R1376
R1377
R1378
R1379
E-4
R1221
R1222
R1223
R1224
R1226
R1227
E-b
D-5
E-5
D-5
D-5
D-5
E4
R1276^
R1277
R1278
R1279
R1281
R1282
R1283 > on switch
S15
R1284
R1286
R1287
R1288
R1289
R1291 /
R1301 E-5
R1302 E-4
R1303 E-5
R1304 E-5
R1305 E-4
R1306 E-5
R1307 E-5
R1308 E-5
R1309 E-5
R1311
R1312
R1313
R1314
R1316
R1317
R1318
R1319
R1321
R1322
R1324
R1326
R1327
R1328
R1329
R1330
R1331
R1332
R1333
R1334
R1336
R1337
R1338
R1339
R1340
R1341
R1342
R1343
E-5
E-5
D4
E-5
E4
E-5
E4
E4
D4
E4
D4
D4
E4
D4
E4
D-4
'I
^
on switch
SI o
R138’
R1382
R1383 >
R1401 F-4
R1402 F4
R1403 F-4
R1404 F-5
R1406 F4/F-5
R1407 F-5
R1408 F-5
R1409 F-5
R1411
F-5
R1412
R1413
R1414
R1416
R1417
R1418
R1419
R1421
R1422
R1423
R1424
R1425
R1426
R1427
R1428
R1429
R1431
R1432
R1433
R1434
R1436
F-5
R143:^
G-3
R1438
R1439
G4
F-5
F4
F4
F4
F-4
F4
F-4
F-4
G-3
R 1 544
R1546
R1547
R1548
R1549
G-2
G-3
G-3
E-4
R1501
R1502
R1503
E-4
R 1 504
E-4
E-4
E-4
G4
G-4
G-5
G-5
G-5
G-5
G-5
G4
G-5
G-4
G-4
G-4
G-4
G-5
G-4
G-5
G-4
G-4
G-5
on tube
G-4
G-4
power
power
power
power
power
power
power
power
power
power
G-2
G-3
G-2
G-3
G-2
G-2
^
on R6
1
^
F-4
G4
G4
G4
supply
supply
supply
supply
supply
supply
supply
supply
supply
supply
power supply
on tube
R1552
R1553 G-5
R1601 B-2
R1602 B-2
R1603 B-2
R1604 B-2
R1606 B-2
R1607 B-2
R1608 B-2
R1609 B-2
R1611 B-2
R1612 B-2
R1613 B-2
R1614 B-2
R1616 B-2
R1617 B-2
R1618 B-2
R1619 B-2
R1651 F-5
I
E-4
G-4
G-3
•N
R1451
G4
R1551
G-3
loc.
G-4
G-3
R 1443
R1449
R1522
R1524
R1526
R1527
R1528
R1529
R1531
R1532
R1533
R1534
R1535
R1536
R1537
R1538
R1539
G-3
E-4
E-4
R1521
G-3
E-4
E-4
F-5
R1542
R1543
G-3
E-4
R1506
R1507
R1508
R1509
R1511
R1512
R1513
R1514
R1516
R1517
R1518
R1519
R1541
R1444
R1446
R1447
E-4
Grid
F-5
G-2
D-4/E-4
Item
F4
R1441
R1442
R1443
E4
loc.
Item
Grid loc.
Item
Grid loc.
Item
Grid loc.
Item
Grid loc.
Item
Grid loc.
R1652
R1653
R1654
R1656
R1657
R1658
R1659
R1661
R1662
R1663
R1664
R1666
R1667
R1668
R1669
R1671
R1672
R1673
R1674
R1676
R1677
R1678
R1679
R1681
R1682
R1683
R1684
R1686
R1687
R1688
F-5
V232
V233
V234
V236
V237
V238
V239
V241
V242
V243
V244
V246
V247
V351
V352
V353
V354
power supply
V701
E-2
E-3
VI 302
VI 303
VI 304
E-5
V1516
V1517
V1518
V1519
V1521
G-4
V702
V703
V704
V801
V802
V803
V804
V806
V807
V808
V809
V1218
V1219
V1221
V1301
E-5
power supply
power supply
power supply
G-4/G-5
E-5
VI 527
VI 528
V1601
B-2
VI 001
VI 002
VI 003
VI 004
VI 006
VI 007
VI 008
VI 009
VI oil
C-4
B-2
E4
V1602
VI 603
D-4
VI 604
B-2
C-5
V1305
V1306
V1307
V1308
V1314
V1316
V1318
V1319
V1321
VI 522
VI 523
VI 524
VI 526
E-4
B-5
VI 322
E-4
C-4/D-4
V1323
E-4
C-5
VI 324
VI 326
V1401
D-4
V1012
V1013
V1014
V1016
V1017
V1018
V1019
C-5
V1402
V1403
V1404
V1406
V1407
V1408
F-5
VI 409
V1411
F-5
F-4/F-5
C-4
V1412
V1413
C-4
VMM
F-4
C-5/D-5
VM16
G-2
C-5/D-5
VMM
G-2
G-3
V1651
V1652
V1653
V1654
V1655
V1656
V1657
V1658
V1659
V1661
V1662
V1663
VI 664
VI 666
V1667
VI 668
D501
D601
D801
D1001
D1101
D1201
D1202
F-5
F-5
F-5
F-5
F-5
F-5
F-5
F-5
F-5
F4
F-4
F-4
F-4
F-5
F-4
F-4
E4
F4
F-5
F-4
F-4
power supply
power supply
power supply
power supply
power supply
power supply
power supply
power supply
power supply
att.
unit
att.
unit
att.
unit
att.
unit
V451
att.
unit
V452
V453
att.
unit
att.
unit
V501
V504
C-2
C-2
F-5
F-5
E-2
F-4
V508
V509
F-4
V511
D-2
F-5
F-4
F4
F-4
VI
V201
tube
power supply
power supply
V202
V203
power supply
power supply
V204
power supply
V206
power supply
V207
power supply
V208
power supply
V209
power supply
V211
power supply
V212
power supply
V213
power supply
V214
power supply
V216
power supply
V217
power supply
V218
power supply
V219
power supply
V221
power supply
V222
power supply
V223
power supply
V224
V226
high
V227
V228 ^ tension
unit
V229
V231 /
""
E-2
V512
V513
V514
V518
V519
D-2
V521
F-2
E-2
E-2
E-2
E-2
V522
V523
V524
V526
F-2
V601
C-3
V604
V608
V609
C-3
veil
D-3
V612
V613
V614
V616
V617
V618
V619
V621
V622
V623
V624
V626
F-2
F-2
F-2
E-3
E-3
D-3
E-3
E-3
E-3
E-3
E-3
E-3
F-3
F-3
F-3
F-3
F-3
VI 020
VI 021
VI 022
VI 023
VI 024
VI 026
VI 027
E-2
E-3
F-2/F-3
F-3
F-3
G-2
G-2
F-2
F-2
F-2
C-4
C-4
C-5
c-4
C-5
C-5
C-5
C-5
C-5
C-5
C-5
C-5
C-5
VI 028 C-5
V1 101 B-4
V1 102 B-4
V1 103 C-4
V1 104 C-4
V1 106 C-4
V1 107 C-4
V1 108 C-4
V1 109 C-4/D-4
VI 201 D-5
VI 202 D-5
VI 206 D-4
VI 207 D-5
VI 208 D-5
VI 209 E-5
V1211 D-5
V1212
V1213
V1214
V1216
V1217
D-5
E-5
E4/E-5
E-5
E-5
E-5
E-5
D4
E-4
E-4
E-4
E-4
F-5
F-4
F4
F4
F-5
F-5
F-4
VM18
VM19
G-3
VM21
VM22
VM23
VM24
VM26
VM27
VM28
VM29
VM31
G-3
G-3
G-4
G-5
G-5
G4
G4/G-5
G4
G-5
B-2
B-2
B-2
F-5
B4/B-5
F-5
F-5
F-5
F-5
F-5
F-5
F-5
F4
E4
F-4/F-5
E-4/F-4
F-4
F-4/F-5
F-4
C-2/D-2
C-3/D-3
F-3
C-5
B-4/C-4
D-5
D-5
G-3
D1203
D-4
G-2
D1204
G-3
D-4/D-5
D-4
G-2
D1301
D1302
G-2
B1
LED
G-2
rear panel
G-2
T101
T201
G-4
G-4
G-4
F201
K501
K601
K1401
G-4
L201
G-4
G-4
L202
L203
power supply
power supply
power supply
E-4
VI 501
VI 502
VI 503
VI 504
VI 506
VI 507
VI 508
VI 509
VI 511
T202
G-4
L801
G-2
D-5
V1512
G-4
L802
F-2
E-4
V15M
G-4
LI 501
trace rot. coil
D-5
D-5
G-4
G4
D4
power supply
power supply
power supply
C-2
C-3
F4
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