PHILIPS - PoC-Net
50
PHILIPS WiIUDi PM 334 OUAI T0.ACE Y AMPI PM 3342 DUAL TRACE UNIT 9499 440 04911 21 869 2 02 03
Transcript of PHILIPS - PoC-Net
PHILIPS
WiIUDi PM 334 OUAI T0.ACE Y AMPI
PM 3342 DUAL TRACE UNIT
9499 440 04911 21 869 2 02 03
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IMPORTANT
In correspondence concerning this apparatus, please quote the type number and the serial number as given on the type plate at the rear of the apparatus.
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Contents
GENERAL INFORMATION XI. Checking and adjusting 26
I. Introduction 7
II. Technical data 7 A. General information 26
III. Description of the block diagram 9 B. DC balance 26
C. Levels of channels A and B 27
DIRECTIONS FOR USE D. Sensitivity of channels A and B 27
E. AC-DC switch; CHECK ZERO 27 IV. Installation 11
F. Square-wave response 27 V. Controls and their functions 13
G. Frequency response curve 29 VI. Applications 15
H. Defection and shift 29 A. Amplitude measurements 15 B. Differential measurements 15
J. Input attenuators 29
C. Phase measurements 16 K. Blocking of channels A and B 30 D. Single time-base 16
L. Rejection factor 30
M. Triggering 30 SERVICE NOTES
N. Cho in pp~ g 31
VII. Block diagram 17 O. Alternate 31
VIII. Vertical amplifier 23 XII. Parts lists 32
IX. Switching control-circuits 24 A. Mechanical 33
X. Trigger amplifier 25 B. Electrical 34
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List of figures
Fig. Page
1 Block diagram 9
2 Front view with indication of controls and connections 12
3 Block diagram (detailed) 19
4 Typical waveforms 22
5 Display 22
6 Right-hand view 26
7 TU-5 pulser 28
8 Left-hand view 28
9 Measuring probe, directly earthed 29
10 Input RC standardiser 30
ll Amplifier, channel A 38
12 Amplifier, channel B 39
13 Dual-trace unit 40
14 Output amplifier 40
15 Trigger amplifier 41
16 Drift compensator 41
17 Attenuator, channel A 44
18 Attenuator, channel B 48
19 Trigger-amplifier circuit 52
20 Dual-trace circuit 56
21 Y-amplifier circuit 61
z
GENERAL INFORMATION
Introduction 0 The PM 3342 is a dual-trace plug-in unit for the Y-channel of the PM 3330.
The unit contains two identical amplifiers with an electronic switch, by means of which two signals can be compared in amplitude and in phase.
Technical data
Note: Properties, expressed in numerical values with statement of tolerances are guaranteed by the factory. Numerical values without tolerances are intended for information purposes only and indicate the properties of an average apparatus.
Input circuit
input
input impedance input maximum permissible d.c. voltage in the a.c. position
Measuring probe
type input attenuation permissible voltage
Amplifier
deflection coefficient
Moreover, the sum and the difference of two input signals can be displayed. Trigger of the time base occurs at choice on one of the two input signals or on the combined signal. The amplifier data apply to channel A as well as to channel B.
adjustable AC or DC; push-button for checking the zero level 1 MS2//15pF BNC
400 V
PM 9331 A/10 10 MS2//8 pF 1 : 10, tol.: 3% 1,OOOVpeak
adjustable to 10 calibrated values: 10,20, 50 mV/cm etc., up to 10 V/cm; tolerance: 3% continuous attenuator 1 : 3 (non-calibrated)
bandwith D.C.: 0-50 Mc/s A.C.: 1.6 c/s — 50 Mc/s
rise-time 7 ns rise time of unit by itself: 5 ns
overshoot < 2% rejection factor >_ 100 x for frequencies < 1 Mc/s in position D.C. provided that the
amplifiers are adjusted to identical deflection-coefficients maximum common mode input signal corresponding to 10 cm trace height magnification 3 times useful screen height, symmetrical round the centre of the screen
for frequencies up to 10 Mc/s. The top of a signal, which is magnified at maximum, can be displayed with the shift control.
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polarity
phase difference between both channels
Switching possibilities
externally chopped
voltage required
repetition frequency
rise time
input capacitance
Trigger mode
trace height required in positions
DC, LF and HF
in position AUT.
in positions
TV LINE and TV FRAME
Mechanical data
reversible
not measurable on the screen
1. channel A
2. channel B
3. channels A and B chopped; frequency 500 kc/s or 20 kc/s (internal
selection facility)
4. channels A and B alternately
5. channels A and B added
6. channels A and B externally chopped symmetrical square-wave voltage:
minimum, 1 VP _p,
maximum, 20 Vp _p
100 kc/s
1-100 ns
70 pF
A, B or A -~ B (in position "ADDED" only)
3 mm for frequencies up to 10 Mc/s
2 cm for frequencies up to 20 Mc/s
1 cm for frequencies up to 1 Mc/s
2 cm
dimension width 15 cm
height 17.5 cm
length 29 cm (knobs and plug included)
weight 3 kg
Accessories 1 Manual
Optional: 2 Measuring probes PM9331A/10
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Description o f the block diagram
Channels A and B each consist of an input circuit in which the "AC-DC" switch and the step attenuator are included., and an amplifier which contains the V/cm continuous attenuator, the SHIFT control and the polarity switch, see Fig. 1.
The switching of these channels occurs at the output of these amplifiers, after which the combined signal is applied to an output amplifier. The switching circuit consists of a blocking oscillator
A
0
CHECK V/cm
A C ZEORO
~DC
20 kHz r -~ I...i
i 500 kHz ~T'
MODE
A • t --
B •
CHOPPED •
ALTERNATE •
ADDED •
EXT.-CHOPPED
O
B
OAC~DC
r --
b DCBAL Z MOD
1
PM 3330
BLOCKING
OSCILLATOR
CATH
FOLL. AMPLIFIER
and a bi-stable multivibrator, which supplies the switching voltage. The trigger voltage for the basic oscilloscope is taken from one of the channels via a selector switch. A trigger amplifier amplifies this voltage, so that the trigger- signal and the Y-input signal have identical amplitudes. In position "ADDED" of the "MODE" selector, the trigger signal is directly taken from the output ampli-fier.
NORMAL
INVERT
V'cmCONT
I '
~ I SHIFT
b GAIN
TRIGG r TRIGGER
AMPLIFIER
MULTIVIBRATOR
1
ELECTR.
SW TCH
DCBAL
4 L_-
CHECK ZERO
V/ /CSR \
Fig. 1. Block diagram
CATH
FOLL.
GAIN
V/cm CONT
I SHIFT
AMPLIFIER NORMAL
INVERT PEM 2633
I
FINAL —~ I Y-AMPL. I
—~1 I
POS. IADDED]
TRIGGER O I PRE-AMPL.
STAGE
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DIRECTIONS FOR USE
Installation
The PM 3342 shculd be plugged into the left plug-in compartment (Y-UNIT) of basic oscilloscope PM 3330. Switching-on is effected with the mains switch of the basic oscilloscope. Approximately 10 minutes after switching-on, the
unit has reached its operating temperature and meets the technical data.
When using the PM 3342, the switch on the rear side of the basic oscilloscope should be set to position "MULTI-TRACE CHOPPER".
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DN~tIDS PM 334 DUAL iRA~
SK8 ,.-=.. ~ ate,,.. ~ SK6 S K 9 ---~
SK 10
Fig. 2. Front view with indication of controls and connections
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Controls and their functions (Fig. 2) O
MODE selector SKS
~ ~ ~ i ~ ~ ~ ~ i i i i
~~ ~~` ~~`
~ `~
~~
Trigger mode selector SK6
Input circuit
The working mode of the unit can be selected with the
six-position mode selector.
channel A is switched in, channel B is out of action
channel B is switched in, channel A is out of action
CHOPPED both channels are switched in. The volt-
ages applied to sockets A and B are elec-
tronically switched. The frequency in
which the channels are switched, can be
adjusted to 20 kc/s or 500 kc/s with switch
SK 11, located on aprinted-wiring board
at the right-hand side of the unit.
"ALTER- channels A and B are alternately dis-
NATE" played. Switching occurs during the flyback of
the time-base voltage.
"ADDED" the voltages at the output of both ampli-
fiers Aand Bare added. Dependent on
the position of the polarity switches, the
sum or the difference of the input signals
is applied to the Y-amplifier of the basic
oscilloscope.
"EXT. The channels are switched with a voltage,
CHOPPED the frequency of which is equal to that of
BU3" the voltage applied to socket "EXT.
CHOPPED".
TRIGG A The trigger signal is equal to the voltage
applied to socket A.
B The trigger signal is equal to the voltage
applied to socket B. When the MODE selector is in position
"ADDED", the "TRIGG." switch is out
of action. In that case the trigger signal is
taken from the output amplifier.
AC-DC Via this switch, the input socket is con-
switch nected to the V/cm switch. In the DC-
(SK3; SK9) position, the entire input signal is fed to
the V/cm switch; in the AC-position, the
DC-component is blocked.
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Push-button By depressing this button the input circuit CHECK is interrupted and the amplifier input is ZERO earthed, so that the zero level can be (SKl; SK7) checked.
Double With this double knob the deflection knob V/cm coefficient of the amplifier can be adjus-(R3; RS) ted.
The deflection co-efficients are calibrated when the continuous control is turned fully clockwise (position CAL.).
Polarity switch SK2 & SK8
SHIFT knob Rl & R7
GAIN control R4 & R6 (screw-driver adjustment)
DC BAL. control R2 & R8 (screw-driver adjustment)
"NORM." : a positive-going input signal causes an upward deflection on the screen.
"INVERT.": a positive-going input signal causes a downward defection on the screen.
With this knob the trace can be shifted in Y-direction. The working-direction of this SHIFT knob is depen-dent o~n the position of the polarity switch.
The deflection coefficient of the amplifier can be checked by applying the calibration voltage of the basic oscilloscope to the input socket. If the deflection coefficient does not correspond to the indicated value, it can be corrected by adjusting the GAIN control. In this case the continuous V/cm con-trol should be turned fully clockwise (CAL.).
The DC-balance of the amplifier can be adjusted with this control. For this, remove the input signal and adjust the time-base generator to its fre-running position (TRIGG. MODE to position AUT., or STAB. fully clockwise). Adjust the DC BAL. in such way that the line on the screen does not move when rotating the continuous V/cm control.
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Applications
A. AMPLITUDE MEASUREMENTS
When measuring the amplitude of a signal, use is made of the calibrated deflection coefficients of the Y-de-flection system (SK4; SK10). Intermediate, non-calibrated deflection coefficients can be obtained by operating R3 and R5. With the aid of the controls of the basic oscilloscope
.and the plug-in unit, make a triggered display visible. Check the zero level by means of button CHECK ~ VLcm ZERO (SK1; SK7). (When the trigger-mode switch is
in the AUT. position, the time-base line will remain
visible during depression of push-button CHECK
ZER®. When a different position is used, the time-base generator should be adjusted to its free-running posi-tion by means of the STAB. control).
The amplitude of the total signal is then equal to the product of deflection coefficient and the vertical de-flection in cm. Amplitude: 0.5 V/cm x 3.4 cm = 1.7 V. When only the AC-voltage should be measured, the DC-component can be removed from the signal with the aid of the AC-DC switch. If measurements have been carried out via measuring
probe PM 9331 A/10, the deflection coefficient of the V/cm switch should be multiplied by a factor 10.
'The accuracy of the measurement can be increased by precisely adjusting the deflection coefficient with the GAIN control in the relevant position of the V/cm knob. For this, the calibration voltage of the basic oscillo-scope can be used.
B. DIFFERENTIAL MEASUREMENTS
With these measurements, use is made of the common
mode rejection of the amplifiers in position ADDED. When the polarity switches are set to opposite posi-
tions, two common mode signals on sockets A and B will undergo a very slight amplification with respect
to two signals in anti-phase.
The signals on sockets A and B should not exceed a value corresponding to a trace height of IO cm.
This common mode rejection can be adjusted to maxi-
mum by adjusting the amplifiers in such a way that their amplifications for the signal to be measured are exactly identical.
3.4cm
0-niveau
16
Channel A
~~
PEM 2900
Channel B
For this, simultaneously apply one of the signals to sockets A and B. Adjust the GAIN control in such a way that a minimum trace height is obtained on the screen.
After this, the common mode rejection will meet the value mentioned in the technical data.
C. PHASE MEASUREMENTS
If the phase difference between two signals is to be measured, the phase equality of both amplifiers of the PM 3342 is used. It is recommended to set the MODE selector to posi-
tion ALTERNATE. With low repetion frequencies of the time-base generator, this working mode results in a flickering display; in these cases the CHOPPED position should be used. A high chopper frequency may lead to mutual influence of the two signals; therefore, it is recommended to set the frequency switch to the 20 kc/s position.
The signals are applied to socket A or B respectively.
Make a triggered display visible with the controls of
the basic oscilloscope and the PM 3342. Both traces should be adjusted exactly symmetrical
with respect to the centre horizontal graticule line.
The phase difference can be read directly in degrees by adjusting knob TIME/cm (step- and continuous control
of the basic oscilloscope) in such a way that one period of the signal to be measured corresponds to a whole number of centimetres on the screen.
D. SINGLE TIME-BASE
If the signal to be measured requires the use of the single-sweep display of the basic oscilloscope, the MODE switch of the PM 3342 should be set to position CHOPPED. Selection of the switching frequency depends on the time coefficient of the X-deflection.
V/cm, of both channels: identical Polarity of channel A: INVERT. Polarity of Chanel B: NORMAL MODE in position: ADDED
Generally, the highest chopper frequency will be used; for the lower time-base speeds however, also the lowest chopper frequency can be selected. Set the controls in the TIME BASE A frame to the desired positions.
When the time-base generator is adjusted to its free-running position (STAB. control to REPET), it will
start immediately after depressing push-button RESET.
When the STAB. control is in the trigger position,
the time-base generator will start on the first trigger
pulse, after depressing the RESET button. During the time between depression of the RESET
knob and starting of the time-base generator, the lamp in the RE5ET knob will light up.
PEM 2899
1 period = 9 cm phase coefficient = 40°/cm
phase angle cp = 40°/cm x 1.6 cm = 64°
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SERVICE NOTES
Block diagram
Fig. 3 shows that each channel has independent control for: input coupling, attenuation, shift, balance and polarity. The output of each channel is controlled by a multivibrator-driven electronic switch, which feeds the common amplifier. Operation of this multivibrator in turn is controlled by the MODE switch SKS. The MODE switch can either hold the multivibrator in one of three states or select one of three operating modes for the blocking oscillator which drives the multivibra-tor. It will also bee seen that internal trigger signals can be derived from one of three sources: channel A, channel B or the common amplifier output. The latter is automatically selected via SKS and the relay, when the added mode is used. In this way, triggering on the desired signal is possible and triggering on the chopper is impossible.
Display MODE switch SKS. In position A as well as in position B, the multivibrator is held in the stable state that allows the signal coming from the selected channel to pass through its electronic switch to the common amplifier.
In the ADDED position, the multivibrator is held in such a state that both electronic switches pass their signals to the common amplifier where they are added.
In the CHOPPED position the blocking oscillator is free-running either at 1 MHz or at 40 kHz, depending on the position of SKll (inside the apparatus). Pulses from the blocking oscillator drive the multivibrator, which supplies anti-phase square-waves at 500 kHz or 20 kHz to the electronic switches. Thus: first the signal from one channel will pass to the common amplifier,
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But Channel AC
®Ac DC V~cm
SK3 (steps) SKG o-
~~ Stepped Atten
SK9 o-
Bu3 Channel BQ ~'
"Gate'~pulse from time base
8u2 Ext.Copped
O ~
0
R8
1 M Hz 40 kHz
Blocking
Osc TS 502
SK 10
Stepped Atten
dd
Check Zero
SK1
SK7
D.C.
Bal
Cath. Foll. 8201-6202
V/c m Gain shift (cont)
R2
Cath. Foll B 301 8302
Amplifier TS 201 -T520G
R3 i p R1 -{ J-
R4
-6.3V
~ SK 5
11 Bu•y
Fig. 3. Block diagram (detailed)
SK 5
Amplifier TS 301 TS 304
® Norrcal
Invert.
SK2 moo--~
•
~~ l l
SK8 ~-o
El Switch T 5 206 TS209
RS 0 R7
R6
El Switch TS306 TS309
Channel A orChannel B o
SK 6
Final A m pl. TSG01 TSG09
~~1 Bu•y
0
0 0 24V
~r ~ ~ SK 5
o
Multi vibr.
TS 503 TS 504
#z
Trigg. Ampl. TS G02 IS 609
17 Bu-y
RE 601 --~+-►16 Bu•y
—O I ►32 Bu•y
o f
o ~
-24V ~ SK 5
O
O ~
~---~ -z4 v ~ SK 5
0
D SPLAY MODE ► Z -Mod. A 9 Bu -y Bo 0
Chopped SK 5
Alternate a Addedo p
Extchopped
o b 24V
0 p SK 5
0
PEM 2897
22
1 2 3 4 5 6 7 0 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7 8 1
Input channel A
Input channel B
Time-base sweeps
I 2 3 L
Output
Vertical amplifier
Fig. 4. Typical waveforms
II
II Iff 1Y
2 3 L 5
TY
then that from the other. In this way, the spot will fol-low apart of each signal in turn as shown in Fig. 4 and as it will not be the same part each sweep, the persis-tance of vision (and sometimes that of the CRT) will create the illusion of two complete waveforms on the screen, as shown in Fig. 5. To prevent hazing as the spot moves from one trace to the other, blanking pulses, derived from the blocking oscillator, are fed to the CRT via 9 BU-Y.
III IY I II III
3 L 5 6
Fig. S. Display
~~
3 L 5 6 7
_~
I II
~-
5 6 7 0
I
_~
PEM 2898
In the EXT. CHOPPED position, operation is the same as for CHOPPED, except that now the blocking oscillator will not be free-running but has to be trig-gered, via BU2, by an external signal. In the ALTERNATE position, the blocking oscillator is triggered during the fly-back of the time-base. Thus the spot traces out first one signal and then the other.
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Vertical am~li Fier
1. Pre-amplifier channel A (Fig. 21)
The incoming signal is fed directly or via a capacitor depending on the position of switch SK3 (AC-DC), to a 10-step attenuator, which reduces the signal amplitu-de by afactor 1, 2, 5, 10 etc. up to 1000, as selected with switch SK4 (V/cm). Cathode-follower B201 provides an impedance trans-formation to drive the following transistor amplifier. As the cathode-follower is subject to some DC-drift, a second cathode follower B202 is symmetrically con netted to it to minimise drift. Furthermore, provision is made to balance the amplifier by varying the grid potential of B202 at R321 "COARSE DC-BALANCE" and R2 "DC-BAL". When properly adjusted, no signal will be present across R3 (CONTINUOUS CONTROL) if the grid circuit of B201 is connected to earth with switch SK1 ("CHECK ZERO"). Clamping diodes GR202 and GR203 prevent the tran-sistor amplifier (TS201-TS202) driving signal from becoming intolerably high in either the positive or the negative direction. Protecting diode GR201, which is normally forward biased, p~ events the maximum (negative) grid-to-cathode voltage from being exceeded, because if such a signal is present, protecting diode GR201 will be reversely biased. The cathode voltage will then be determined by the —150 Volts supply and the voltage-drop across R206 due to the cathode cur-rent. To complete the temperature-compensation, the cathode circuit of B202 is likewise provided with diode GR206 of the same type. Diode GR204 prevents high voltages from being applied to TS202.
The second stage is formed by emitter-followers TS201 and TS202. They offer a low impedance signal source for the next stage and for the trigger-amplifier, which receives its signals via R232 and R237. From conti-nuous control R3, the signal is routed to the third stage, TS203-TS204. This stage can be regarded as an asymmetrically driven long tailed-pair amplifier. The output of this stage consists of two equal, but opposite, signals. GAIN control R4 influences the negative feedback and consequently the amplification factor. R235 and C211 provide a correction to obtain optimum step-response. Shift controls Y-SHIFT (R1-R1') and the polarity switch SK2 are inserted between the third and fourth stage. The connections from the third stage to SK2 and from SK2 to the fourth stage are effected by means of a 300 Ohm ribbon line, which is terminated by R249 and the series-connection of R254-R256. The power is
supplied at the junction of R254-R256. In this way, the total dynamic resistance at the collectors of TS203 and TS204 amounts to 75 Ohms. The fourth stage consists of two cascode amplifiers (TS206-TS208 and TS207-TS209) which are push-pull connected. Transistors TS206 and TS207 act as current sources to the low-ohmic inputs of TS208 and TS209 respectively. Thus hardly any signal voltage will be present at the emmitters of TS208 and TS209, so it is possible to carry out the electronic switching at this point. If the voltage at R508 becomes more positive than the emitter voltage, switching diodes GR209 and GR211 are blocked, thus allowing normal operation of the cascode-amplifiers. If the voltage at R508 is decreased below the potential at the bases of TS208 and TS209, the transistors are fully blocked and diodes GR208 and GR212 likewise. So no signals will pass and channel A is cut off. In the emitter circuit of TS206 and TS207, R263 and C217 provide low frequency compensation; C218 improves the step-function response.
2. Pre-amplifier channel B (Fig. 21)
This pre-amplifier is identical to that of channel A. The switching voltage of channel B however, is counter-phased. Thus the diodes GR309-GR311 are conductive when GR209-GR211 are blocked and vice versa .As a result, the signal of channel A is displayed when channel B is blocked and vice versa.
3. Output amplifier (Fig. 21)
The driving signals of the output amplifier are devel-oped across R402 and 8406. Emitter-followers TS401-TS402 offer these signals with a low source impedance to cascode-amplifiers TS403-TS406 and TS404-TS407 The amplified signals are finally routed to the output stage consisting of emitter followers TS408-TS409 which make them available to the vertical amplifier of the basic oscilloscope via terminals 1 and 17 of BU-Y. When the MODE-switch SKS is in position ADDED, diodes GR209-GR211-GR309-GR311 are blocked simultaneously so that both channels are switched in and a combined signal is applied to the output ampli-fier. To maintain the same voltage-level at R404, R401 is connected in parallel. The two cascode-amplifiers are connected in push-pull arrangement with a high common resistance at the emitter side of TS403-TS404 thus forming one differen-tial amplifier. C422, C401 and R413 improve the step-functionresponse.
24
Switching control circuits
1. Blocking oscillator (Fig. 20)
1f SKS is in the CHOPPED position, switch SKS IA is open, so that the potential at the base of TS502 is de-termined, by voltage-divider R 504-506. It is adjusted so that the blocking oscillator becomse astable, oper-ating at a repetition rate of 40 kHz or 1 MHz depending on the position of SK11).
In all other positions of SKS ,switch SKS lA is closed, thus setting the base to approximately emitter-potential. TS502 is almost cut-off but it will operate when a nega-tive pulse arrives at the base from terminal 4 of S2 (transformer T501). If SKS is in the ALTERNATE position, C500 and R511 differentiate anegative-going pulse, which arrives at terminal 11 BU-Y and which has the same duration as the GATE pulse of the basic oscilloscope. The posi-tive-going spike resulting from the trailing edge, is passed by diode GR507 to emitter-follower TS501, which injects it into winding SS of transformer T501. The inverted pulse is applied to the base of TS502, which triggers the blocking oscillator to deliver one pulse, after which the oscillator returns to its quiescent state. If SKS is in the EXT. CHOPPED position, the signal entering at BU2 is differentiated by C500 and R511 and triggers the blocking oscillator as mentioned under ALTERNATE. Every time the blocking oscillator operates, a pulse
appears at winding S1 of transformer T501. It is routed to terminal 9BU-Y to momentarily blank the display on the sereen. To ensure that the blanking pulses reach the CRT at the moment that the switching pulse (delayed by the vertical amplifier) reaches the Y-deflection plates, a 120 nanosecond delay-line is fitted in the main frame. Resistor R503 (470 S2) ter-minates this delay line to avoid reflections.
2. Multivibrator (Fig. 20)
The bi-stable multivibrator TS503-TS504 is locked in postition: TS503 cut-off. TS504 conductive, when MODE selector SKS is in position A. As a result, the electronic switch of channel A is closed and that of channel B is open. When SKS is in position B, TS504 is blocked and the signal of channel B is displayed. When SKS is in the ADDED position, both transistors are blocked and both electrcnic switches are therefore closed. When SKS is in the CHOPPED, ALTER-NATE ar EXT. CHOPPED positions, the bi-stable multivibrator switches at half the rate of the blocking oscillator. It may be observed that switching diodes GR501 and GR502 are conductive when their appertaining tran-sistors are conductive. They then offer a low ohmic path to an incoming negative switching pulse. The transistor will be blocked and also the diode which will then turn into ahigh-ohmic impedance.
25
Trigger amplifier O The trigger amplifier (Fig. 19) consists of four push-pull stages which are directly coupled to each other. The first three stages are long-tailed pair amplifiers: the fourth stage is connected as an emitter-follower output —stage. The balance of the amplifier is adjusted at the first stage by R605; the quiescent DC-level of the output is ad-justed by changing the value of R623. The output of the trigger amplifier is connected to the
trigger amplifier of the main frame via contacts of relay RE601.
When MODE selector SKS is in the ADDED position, the relay is energised and the output of the trigger amplifier is disconnected. The main frame trigger am-plifier is then connected to the output of the vertical amplifier.
26
Checking and adjusting
A. GENERAL INFORMATION
The tolerances mentioned are factory tolerances; they apply when the apparatus is readjusted completely. They may differ from the data given in II. A summary of the adjusting elements, their nomencla-ture and location has been given in V.
With the aid of these data, it is possible to carry out all the adjustments of the dual trace unit PM 3342 and to check the proper working of the plug-in unit. For this, the unit should be inserted into the Y-plug-in compartment of a correctly adjusted basic oscilloscope PM 3330.
Some of the adjusting elements are on the right-hand side of the unit and are not directly accessible. When these elements must be adjusted, the unit should be connected to the basic oscilloscope via the rigid exten-sion plug (code number 4822 263 70009). For a complete adjustment of the instrument the se-quence as described in this chapter is to be preferred.
R 313
Fig. 6. Right-hand view
B. D.C. BALANCE
This adjustment should be carried out when the unit has obtained its operating temperature, i.e. approxi-mately 15 minutes after switching-on. Set the knobs of the basic oscilloscope to the following positions: "TRIGG. MODE": "AUT." "TRIGG. SOURCE": "[NT." "TIME/cm": "2 msec./cm" "X-DEFLECTION": "TIME BASE A"
1. Channel A R213 (Fig. 6) Set "MODE" (SKS) to "A" and turn "D.C. BAL." (R2) to its mid-position. During this adjustment, keep the time-base line on the screen with "SHIFT" (R1).
— Adjust the coarse control "D.C. BAL." (R213) so, that the time-base line hardly moves when "V/cm" (R3) is turned fully clockwise or anti-clockwise.
— With the fine control "D.C. BAL." (R2), adjust for a stationary display.
I R 213
TS 608
TS 609
TS 602
TS 603
15
27
2. Channel B R313 (Fig. 6)
- Set "MODE" (SKS) to "B" and turn "D.C. BAL." (R8) to its mid-position. During this adjustment, keep the time-base line on the screen with "SHIFT" (R7).
- Adjust the coarse control "D.C. BAL." (R313) so, that the time-base line hardly moves when "V/cm" (RS) is turned fully clockwise or anti- clockwise.
- With the fine control "D.C. BAL." (R8), adjust for a stationary display.
3. Trigger amplifier R605, R623 (Fig. 6)
The d.c. balance and the output level of the trigger am-plifier are adjustable with "BAL." (R605) and choice resistor R623. These adjusting elements are accessible if the unit to be measured is connected to the basic oscilloscope via the extension plug.
Short-circuit the input of the trigger amplifier by interconnecting the bases of transistors TS602 and TS 603 (See Fig. 6). Measure the voltage on the output of the amplifier between the emitters of transistors TS608 and TS609. (See Fig. 6). Adjust this voltage to minimum with "BAL" (605R). Check the voltage level of both points with respect to earth; this should amount to -~ 18 V, tolerance -~ or — 2 V. If necessary select a different value for R623. Remove the interconnection.
C. LEVELS OF CHANNELS A AND B
- Set "MODE" (SKS) to "A" and adjust "SHIFT" (R1) so that the trace does not jump when "POLA-RITY" (SK2) is switched-over.
- Set "MODE" (SKS) to "B" and adjust "SHIFT" (R7) so that the trace does not jump when "POLARITY" (SK8) is switched-over.
- In both cases, the vertical position of the time-base line should not diviate more than 1 cm from the centre of the screen.
D. SENSITIVITY OF CHANNEL A AND CHANNEL B
- Set the below mentioned knobs to the following positions: "V/cm" (SK4) and "V/cm" (SK10) to ".O1" "MODE" (SKS) and "TRIGG." (SK6) to "A" "V/cm" (R3) and "V/cm" (RS) to "CAL". Adjust the calibration voltage of the basic oscil-loscope to 40 mV and apply this voltage to channel A.
- With "GAIN" (R4), adjust the sensitivity so, that the trace height of the reproduced square-wave voltage is 40 mm. Set "MODE" (SKS) to "ADDED" and "POLARI-TY" (SK2 and SK8) to "NORMAL" and "INVERT" respectively. Also apply the 40-m V calibration voltage to channel B by interconnecting the inputs of both channels. With "GAIN" (R6), adjust the sensitivity of channel B so, that it is equal to that of channel A; in this
case no vertical deflection is visible. - Set "MODE" (SKS) to position "A". - Check that the sensitivity of channel A can be con-
tinuously controlled with "V/cm" (R3). - With R3 fully anti-clockwise, the sensitivity should
be so reduced that the trace heigth does not exceed 16 mm.
- Set "MODE" (SKS) to position "B". - Set "TRIGG." (SK6) to position "B".
Check that the sensitivity of channel B can be con-tinuously controlled with "V/cm" (RS). With RS fully anti-clockwise, the sensitivity should
be so reduced that the trace height does noet exceed
16 mm.
E. A.C./D.C. SWITCH; CHECK ZERO
- Set the below mentioned knobs to the following positions: "POLARITY" (SK2-SK8) to "NORMAL" "A.C./D.C." (SK3-SK9) to "D.C." "MODE" (SKS) to "A" and "B" respectively "TRIGG." (SK6) to "A" and "B" respectively "V/cm" (SK4 and SK10) to ".O1 V" Adjust the calibration voltage of the basic oscillo-scope to 40 mV and apply this voltage to channel A (channel B). Adjust "SHIFT" (R1) (R7) so, that the lower side of the trace coincides with the centre line of the
screen.
Set SK3 (SK9) to "A.C." In both channels the DC-components should be blocked, as a result of which the trace is written approximately symmetrically around the centre line of the screen. If "CHECK ZERO" is depressed, the trace should no longer be visible.
F. SQUARE-WAVE RESPONSE
To avoid extra capacitive load on the output of the amplifier, this adjustment should be carried out without using the extension plug. To check the rise time and the overschoot, a square-wave voltage with a value of 40 mVp_p and a rise time of 1.5 nsec. is required. This voltage can be obtained with the aid of a pulser
28
2700 St
1 WATT
s% TO BE ADDED
Fig. 7. Tz7-S pulser
which is controlled with the aid of the calibration volt-age of the basic oscilloscope; the output voltage of the pulser can be adjusted to the required value by means of an attenuator. If a Tektronix TU-5 Pulser (cat. nr. 015-0038-00) is used a 2700 S2 resistor (.1 Watt, 5%) must be added as shown at Fig. 7. — Set the knobs of the basic oscilloscope to the follow-
ing positions:
"TIME/cm": ".OS µsec./cm"
"MAGNIFIER": "x 5".
C 318
Fig. 8. Left-hand view
1. Channel A
— Set the knobs mentioned below to the following positions:
"V/cm" (SK4) to ".O1 ".
"V/cm" (R3) to "CAL." "MODE" (SKS) and "TRIGG." (SK6) to "A". Apply a 40 mV square-wave with a rise time of ~ 25 nsec. to BU1.
Adjust the frequency to 200 Hz and the timebase to 2 msec/cm.
— Select C217 and R263 so that optimum squarewave display is obtained.
Increase the frequency to 10 kHz and the timebase to 50 µsec./cm. Select C215 and R255 so that optimum squarewave display is obtained.
Increase the frequency to 100 kHz and the timebase to 2 µsec./cm. Select C211 and R235 so that optimum squarewave display is obtained.
Increase the frequency to 1 MHz and the timebase to .5 µsec./cm.
— Select C422 and R413 so that optimum squarewave display is obtained.
czs ac~2s SQUARE
WAVE RESPONSE
IN PUT CAPACITANCE
29
Connect the pulser to BUl via a 1 5 attenuator (e.g. Tektronix cat. no. 011 — 0060 — 00) and a 50-Ohm pad (e.g. XE 101.96 order no. 4822 263 60013) and apply the calibration voltage of the basic oscilloscope (80 V) to the pulser. Adjust the pulser by turning its knob clockwise so that its output voltage instantly obtains the correct value. Select C218 so that the rise time is minimum (TIME/cm: .OS µsec/cm and "MAGN": X5, i.e. 10 nsec./cm in total) and that the overshoot does not exceed 1%. To check the overshoot, the time coefficient of the basic oscilloscope should be adjusted to 1 µsec./cm. Apply asquare-wave voltage with a frequency of .3 Hz respectively 20 Hz and a rise time of ~ 25 nsec. Check that in both cases the display shows no tilt.
2. Channel B — Set the knobs mentioned below to the following
positions: "V/cm" (SK10) to ".O1". "V/cm" (RS) to "CAL. ". "MODE" (SKS) and "TRIGG." (SK6) to —B". Apply a 40-mV square-wave with a rise time of 5 25 nsec. to BU2. Adjust the frequency to 200 Hz and the time base to 2 msec./cm Select C317 and R363 so that optimum squarewave display is obtained. Increase the frequency to to 50 µsec./cm. Select C315 and R355 so display is obtained. Increase the frequency to to 2 µsuc./cm. Select C311 anal R335 so display is obtained. Connect the pulser to BU2 via a 1 5 attenuator and a 50-Ohm pad (see point F1) and apply the 80-V calibration voltage.
— Select C318 so that the rise time is minimum ("Time/cm": .OS µsec./cm and "MAGN." :XS, i.e. totally 10 nsec./cm) and that the overshoot does not exceed 1%. To check the overshoot, the time coefficient of the basic oscilloscope should be adjusted to 1 µsec./cm. Apply asquare-wave voltage with a frequency of .3 Hz resp. 20 Hz and a rise time of < 25 nsec. Check that, in both cases, the display shows no tilt.
10 kHz and the time base
that optimum squarewave
100 kHz and the time base
that optimum squarewave
G. FREQUENCY RESPONSE CURVE
After adjusting the square-wave response of both chan-nels (see F1-2), the —3 dB paint of the amplifier should lie at a frequency above 50 MHz. The frequency res-ponse curve can be measured with e.g. the PHILIPS
A.M./F.M.-generator GM 2621 and the PHILIPS H.F.-millivoltmeter GM 6025. Check at the input of both channels that the voltages required for the mea-surement of the frequency response curve are equal. For this, connect the measuring pin of the probe to the centre contact of the A.C./D.C. switch; the casing of the measuring probe should be directly earthed, so without the use of the earthing cord (as in Fig. 9).
Fig. 9. Measuring probe, directly earthed
1. Channel A — Set the knobs to the positions mentioned under Fl. — Connect output socket H.F. II of the GM 2621 to the
input of channel A via a terminated 50-52. cable. A 50-52 terminating plug XE 101.96 (code nr. 4822 263 60013) can be used.
— Adjust the frequency to 4.5 MHz and adjust the generator voltage so, that a deflection of 6 cm is obtained.
— Increase the frequency to 50 MHz. With the same value of the input voltage, the deflec-tion should exceed 4.2 cm.
2. Channel B — Set the knobs to the positions mentioned under point
F2. — Connect the generator to the input of channel B and
check the frequency response curve in the same way as indicated for channel A.
30
H. DEFLECTION AND SHIFT
Before carrying out this measurement, check that the DC-balance and the sensitivity of both channels have been correctly adjusted (see points B1-2 and D).
Set the below mentioned knobs to the following positions:
"A.C. D.C. (SK3-SKS) to "A.C." "V/cm" (SK4-SK10) to ".O1 V" "V/cm" (R3-RS) to "CAL." "MODE" (SKS) and "TRIGG." (SK6) to "A" Apply a triangular or sine-wave voltage with apeak-to-peak value of 180 mV and a frequency of 2 kHz to the A-channel. The control range of "SHIFT" (R1) should be so large, that the tops of the trace can be brought within the measuring graticule. With this triple overdriving. no distortion of the trace should occur.
- Set "MODE" (SKS) and "TRIGG." (SK6) to "B". - Apply the voltage to channel B and check in the
same wa.y as for A the shift and the deflection.
J. INPUT ATTE_~UATORS
1. Attenuation and square-wave response For the adjustment of both attenuators, in every posi-tion of V/cm (SK4 and SK10), the corresponding trimmers are accessible from the outside of the atten-uator (see Fig. 8).
Set "MODE" (SKS) and "TRIGG." (SK6) to "A" (B).
- Apply the calibration voltage of the basic oscillos-cope to channel A (B). Adjust the calibration voltage to 40 mV. After cor-rect adjustment of the sensitivity (see point D), the trace height should amount to 40 mm. Check the trace height in all other positions of "V/cm" (SK4, SK10 resp.) according to the follo-wing table; this trace height should amount to 40 mm ~ or — 22%. At the same time, adjust the trimmers mentioned in the table for optimum square-wave response.
Calibration
voltage
V/cm
(SK4—SKIO) Channel A Channel B
40 mV .ol 80 mV .02 C32 C132 .2 V ,OS C34 C 134 .4 V .1 C38 C138
.8 V .2 C42 C142
2 V .5 C46 C146
4 V 1 C49 C149
8 V 2 C53 C153
20 V 5 C57 C157 40 V 10 C61 C161
2. Input capacitance
With the aid of an input RC standardiser, (e.g. Tektronix cat. nr. 011-0073-00 BNC) the input capa-citance can be adjusted to 15 pF in all positions of "V/cm" (SK4-SK10). See also Fig. 10.
Set "MODE" (SKS) and "TRIGG." (SK6) to "A" (B). Apply the calibration voltage of the basic oscillos-cope to channel A (B) via the input capacitance stan-dardiser.
- Adjust the input capacitance of both channels by means of the trimmers mentioned in the table below so, that the square-wave response is optimum..
Calrbration
voltage
V/cm (SK4—SKIO) Channel A Channel B
80 mV .Ol C29 C129
(if necessary, C28)
(if necessary, C128)
.2 V .02 C33 C133
.4 V .05 C36 C136
.8 V .1 C39 C139
2 V .2 C43 C143
4 V .5 C47 C147
8 V 1 C51 C151 20 V 2 C54 C154
40 V 5 C58 C158
80 V 10 C62 C162
K. BLOCKING OF CHANNELS A AND B - Set "MODE" (SKS) to "A" - In this position, channel B should be blocked. Check
this by turning "SHIFT" (R7); this should have no
\U
BNC-CONNECTOR WG 101 96
~isPf n
C 1M R 7W 1%
Fig. 10. Input RC standardiser
O
BNC-CONNECTOP WL 101 66
PEM 7673
influence on the position of the time-base line. - Set "MODE" (SKS) to "B". - Check in the same way the blocking of channel A by
turning "SHIFT" (R1).
L. REJECTION FACTOR
- Set the below-mentioned knobs to the following positions: "POLARITY" (SK2) to "NORMAL"
31
"POLARITY" (SK8) to "INVERT" "V/cm" (SK4-SK10) to ".Ol V" "V/cm" (R3-RS) to "CAL." "DEFLECTION" (SK3-SK9) to "D.C."
The rejection factor must be greater than 100 x , and can be checked as follows.
Set "MODE" (SKS) to "A" (B) and in both positions adjust the time-base line to the centre of the screen with "SHIFT" (Rl) (R7).
Adjust the sensitivity of channel A according to point "D".
Apply simultaneously identical voltages of 100 mVp_~,, frequency 50 Hz, symmetrical around earthing level, to channels A and B.
Set "MODE" (SKS) to "ADDED." By means of "GAIN" (R6), adjust the sensitivity of channel B so, that the vertical defection is minimum.
The rejection factor exceeds 100 x , if the vertical
deflection does not exceed 1 mm after this adjust-ment
— Increase the frequency of the input voltage to 1 MHz and repeat the abovementioned measurement.
M. TRIGGERING
— Set the belowmentioned knobs of the basic oscillos-cope to the follwing positions: "TRIGG. MODE" to "H. F."
"TRIGG. SLOPE" to "-~"
"TRIGG. SOURCE" to "INT. ". "STABILITY" to "PRESET"
— Set "MODE" (SKS) and "TRIGG." (SK6) to posi tion A.
— Set "V/cm" (R3-RS) to "CAL." — Apply asine-wave voltage with a frequency of 10
MH to channel A and adjust the trace height to 3 mm.
With "LEVEL" (R2) on the basic-oscilloscope, a correctly triggered display should be obtained at this trace height.
Set "TRIGG." (SK6) to "B."
The display should not remain triggered. Set "MODE" (SKS) and "TRIGG." (SK6) to posi-tion "B".
Apply the voltage to channel B and check in the same way the triggering at a trace height of 3 mm.
— With "TRIGG." (SK6) to position "A", the display should not remain triggered.
— Decrease the frequency of the input voltage to 100 kHz and adjust the trace height to 40 mm.
— Check the trigger polarity on both channels. With "POLARITY" {SK2 and SK8) to "NORMAL" time base A should start on the positive-going edge of the signal.
— Check that in position "ADDED" of "MODE"
(SKS), the trigger voltage is taken off via relay RE601.
For this, apply a voltage with a frequency of 100 kHz to channel A and with "LEVEL" of the basic oscilloscope, adjust for a triggered display.
— The triggering should not be affected by switching over "TRIGG." (SK6).
— With "POLARITY" (SK2 and SK7) to "NORMAL" time base A should start again on the positive-going edge of the signal.
N. CHOPPING
1. Frequency
Set "MODE" (SKS) to position "CHOPPED". In this position, two time-base lines should be written which can'be shifted with respect to each other with "SHIFT" (R1 and R7).
With "SHIFT" (R1-R7) adjust the distance between both time-base lines to approximately 5 cm. Both time-base lines should be periodically inter-rupted in the frequency of the switching voltage. With SK11, at the right hand side of the unit, it should be possible to adjust the switching frequency to 20 kHz or 500 kHz.
— Check in both positions of SK11 the switching fre-quency by measuring the period time. For this, the basic oscilloscope should be triggered externally by a signal from terminal 2 of T501 at the dual trace unit (see Fig. 13). Apply this signal to "EXT." (BU1) of the basic oscilloscope and set "TRIGG. SOURCE" (SK3) to "EXT".
— In position 20 kHz of SK11, the period time should be between 40 and 60 µsec., in position 500 kHz between 1.6 and 2.4 µsec.
2. Blanking
— Trigger the basic oscilloscope externally with the switching voltage as indicated in point N1. Adjust the switching frequency to 500 kHz (SK11) and check the blanking. The blanking can be switched on with switch SK14 at the rear of the basic oscilloscope.
— Without blanking (SK14 to position "EXT."), the edges of the switching pulses are visible. When SK14 is set to position "MULTI-TRACE-CHOPPER",
the edges should not be visible.
3. Ext. chopped
— Set "MODE" (SKS) to position "EXT. CHOPPED". — Check that the chopper operates with an external
driving voltage. For this, apply a symmetrical
square-wave voltage with a frequency of 100 kHz
32
and a rise time of 25 nsec. to "EXT. CHOPPED" (BU2).
— With apeak-to-peak value of .9 V, the driver gene-rator should operate and two time-base lines should be written.
O. ALTERNATE
— Set "MODE" (SKS) to position "ALTERNATE".
— Set time base A to its free-running position and ad-just the time co-efficient to ".1 sec./cm".
— Check that the driver generator is switched over by
the ALTERNATE pulse of time base A. In this case, two lines should be written. As distinct from position "CHOPPED" these two time-base lines should be written continuously, but alternately after each other.
— Check this also if the time co-efficient of time base A has been adjusted to .OS µsec.
Remark
In case of breakdown, one can always apply to the world-wide PHILIPS Service Organisation. Whenever it is desired to send the apparatus to a PHILIPS Service Centre for repairs, the following points should be observed.
tie on a label, bearing full name and address of the sender. indicate as complete as possible the symptoms) of
the fault(s). — carefully pack the apparatus in the original packing,
or, if no longer available, in a wooden crate. send the apparatus to the address provided by your local PHILIPS representative.
33
Parts 1 ist
A. MECHANICAL
Item Fig. Qty Code number Description
1 6 1 4822 455 80043 Text plate 2 8 1 4822 265 60002 Connector 3 6 1 4822 273 50068 Switch SKS, 6 4 6 1 4822 290 40008 Terminal 5 6 3 4822 265 10004 Connector (BNC) 6 6 2 4822 277 20014 Sliding switch SK2, SK8 7 6 3 4822 413 40112 Knob, SK4, SKS, SK10 8 6 1 4822 413 30084 Knob, SK6 9 6 3 4822 413 70039 Cap
10 6 1 4822 413 30082 Knob, R1, R7 11 6 2 4822 413 70038 Cap 12 6 2 4822 413 30085 Knob, R3, RS 13 6 2 4822 413 30164 Push button, SKI, SK7 l4 8 1 4822 216 50108 Unit 9, (Amplifier) 15 6 1 4822 216 50109 Unit 10, (Trigger amply. 16 6 1 4822 216 50102 Unit 12, (Dual trace.) 17 8 1 4822 216 50104 Unit 13, (Drift comp.) 18 8 1 4822 216 50114 Unit 14, (Amplifier). 19 1 4822 216 50113 Unit 11, (Final stage) 20 2 1 4822 277 20019 Sliding switch, SK11 (modified)
34
B. ELECTRICAL — ELEKTRISCH — ELEKTRISCH — ELECTRIQUE — ELECTRICOS
This parts list does not contain multi-purpose and standard pare. These components are indicated in the circuit diagram by means of identification marks. The specification can be derived from the survey below.
Diese Ersatzteilliste enthalt keine Universal- and Standard-Teile. Diese Sind im jeweiligen Prinzipschalibild mit Kennzeichnungen versehen. Die Spezifikation kann Sus nachstehender Ubersicht abgeleitet werden.
In deze stuklijst zijn geen universele en standaardonderdelen opgenomen. Deze componenten zijn in het principeschema met een merkteken aangegeven. De specificatie van deze merktekens is hieronder vermeld.
La presence liste ne contient Paz des pieces universelles et standard. Celles-ci ont ete reperees dans le schema de Principe. Leurs specifications soot indiquees ci-dessous.
Esta lists de componenten no comprende componenten universales ni standard. Estos componenten estan provistos en el esquema de principio de una marts. EI significado de estaz marcaz se indicts a continuacidn.
Carbon resistor E24 series Kohleschichtwiderstand, Reihe E24 Koolweerstand E24 reeks 0,125 W Resistance au carbone, serie E24 Resistencia de carbon, serie E24
Carbon resistor E12 series Kohleschichtwiderstand, Reihe E12 Koolweerstand E12 reeks 0,25 W < Resistance au carbone, serie E12 > Resistencia de carbon, serie E12
Carbon resistor E24 series Kohleschichtwiderstand, Reihe E24 Koolweerstand E24 reeks Resistance au carbone, serie E24 Resistencia de carbon, serie E24
Carbon resistor E12 series Kohleschichtwiderstand, Reihe E12 Koolweerstand E12 reeks Resistance au carbone, serie E12 Resistencia de carbon, serie E12
Tubular ceramic capacitor Rohrkondensator Keramische kondensator, bulstype Condensateur ceramique tubulaire Condensador ceramico tubular
Tubular ceramic capacitor Rohrkondensator Keramische kondensator, buistype Condensateur ceramique tubulaire Condensador ceramico tubular
5% 0
1 Mil, 5% 1 Mil, 10°/,
0,5 W < 5 Mil, 1% > 5 <_ 10 Mil, 2%
> 10 Mil, 5
~~
0,5 W _<1,SMi2, 5% >1,SMS2,10%
Wire-wound resistor Drahtwiderstand Draadgewonden weerstand Resistance bobinee Resistencia bobinada
Ceramic capacitor, "pin-up" Keramikkondensator "Pin-up"(Perltyp) Keramische kondensator "Pin-up"type Condensateur ceramique, type perle Condensador ceramico, version "colgable"
"Microplate" ceramic capacitor Miniatur-Scheiben kondensator "Microplate" keramische kondensator Condensateur ceramique "microplate" Condensador ceramico "microplaca"
Mica capacitor Glimmerkondensator Micakondensator Condensateur au mica Condensador de mica
SERVICE
500 V
700 V
500 V
30 V
Carbon resistor E12 series Kohleschichtwiderstand, Reihe E12 Koolweerstand E12 reeks 1 W _< 2,2 Mil, 5% Resistance au carbone, serie E12 >2,2 Mi2, 10% Resistencia de carbon, serie E12
Carbon resistor E12 series Kohleschichtwiderstand, Reihe E12 Koolweerstand E12 reeks 2 Resistance au carbone, serie E12 Resistencia de carbon, serie E12
Wire-wound resistor Drahtwiderstand Draadgewonden weerstand Resistance bobinee Resistencia bobinada
Wire-wound resistor Drahtwiderstand Draadgewonden weerstand Resistance bobinee Resistencia bobinada
10 W 5%,
W 5%
0,4 — 1,8 W 0,5%
5,5 W < 200 i2, 10% >200 i2, 5%
Polyester capacitor Polyesterkondensator Polyesterkondensator Condensateur au polyester Condensador polyester
Flat-foil polyester capacitor Miniatur-Polyesterkondensator (flack) Platte miniatuur Polyesterkondensator Condensateur au polyester, type plat Condensador polyester, tipo de placaz planaz
Paper capacitor Papierkondensator Papierkondensator Condensateur au papier Condensador de papel
Wire-wound trimmer Drahttrimmer Draadgewonden trimmer Trimmer 3 fil Trimmer bobinado
~~y. Tubular ceramic trimmer ifl Rohrtrimmer
500 V Buisvormige keramische trimmer Trimmer ceramique tubulaire Trimmer ceramico tubular
For multi-purpose and standard parts, please see PHILIPS' Service Catalogue.
Fiir die Universal- and Standard-Teile siehe den PHILIPS Service-Katalog.
Voor universele en standaardonderdelen raadplege men de PHILIPS Service Catalogus.
Pour les pieces universelles et standard veuillez consulter le Catalogue Service PHILIPS.
Para piezas universales y standard consulte el Catalogo de Servicio PHILIPS.
} f }
400 Y
250 V
1000 Y
35
Number Code number Value Watts ~ Description
R1,7 4822 102 30066 2 x 20 k52 Duo potentiometer
R2,8 4822 100 20003 470 S2 Potentiometer
R3,5 4822 100 20005 50 52 Potentiometer
R4,6 4822 100 20006 300 52 Potentiometer
R28,128 4822 110 30072 47 S2 0.1 1 Carbon
R29,129 482211120143 500 kS2 0.1 1 Carbon
R31,131 482211120121 1 M52 0.1 1 Carbon
R32,132 482211120147 800 kS2 0.1 1 Carbon
R33,133 482211120117 260 kS2 0.1 1 Carbon
R34,134 482211120148 900 k52 0.1 1 Carbon
R36,136 482211120115 111 kS2 0.1 1 Carbon
R37,137 4822 1 ] 1 20149 950 kS2 0.1 1 Carbon
R38,138 4822 ] 11 20136 52.6 k52, 0.1 1 Carbon
R39,139 482211120151 980 kS2 0.1 1 Carbon
R41,141 482211120109 20.4 kS2 0.1 1 Carbon
R42,142 482211120152 990 kS2 0.1 1 Carbon
R43,143 482211120107 10.1 kS2 0.1 1 Carbon
R44,144 482211120237 995 k52 0.1 1 Carbon
R46,146 482211120238 5.03 kS2 0.1 1 Carbon
R47,147 482211120239 998 kS2 0.1 1 Carbon
R48,148 4822 110 30115 2 kS2 0.1 1 Carbon
R49,149 482211120121 1 M52 0.1 1 Carbon
R51.15] 4822 110 30107 1 kS2 0.1 1 Carbon
R205,305 482211120121 1 MS2 0.1 1 Carbon
R213,313 4822 103 20092 2.2 kS2 3.3 Potentiometer
R235-335 902/A... (].5 kS2) 0.125 5 Choice resistor
R254,254 4822 116 50167 150 52 0.125 1 Metal film
R246,356 4822 116 50166 150 S2 0.125 1 Metal film
R261,361 4822 116 50168 6,8 52 0.25 1 Metal film
R263,363 902/A... (3.6 k52) 0.125 5 Choice resistor
R264,364 4822 116 50168 6.8 k52 0.25 1 Metal film
R605 482210120073 1 kS2 Potentiometer
R623 902/x... (2.2 k52) 0.5 5 Choice resistor
36
CAPACITORS
Number Code number Value Volts Description
C26,126 4822 121 20083 100 nF 600 Paper C28,128 904/P (2.7 pF) S00 Choice capacitor (cer.) C29,129 4822 l2S 60045 68 pF Trimmer (cer.) C33...36 4822 12S 60045 68 pF Trimmer (cer.) C38, 39 4822 12S 60045 68 pF Trimmer (cer.)
C41,141 4822 123 ]0165 27 pF 300 Mica C44,144 4822 123 10166 S6 pF 300 Mica C48,148 4822 123 10167 1S0 pF 300 Mica C42... S 1 4822 ] 2S 60045 68 pF Trimmer (cerJ CS2,1 S2 4822 123 10168 300 pF 300 Mica
C56,1 S6 4822 123 10169 600 pF 300 Mica CS9,1 S9 4822 123 10] 71 1 S00 pF 300 Mica CS3...62 4822 12S 60045 68 pF Trimmer (cer.) C63,163 4822 123 10172 2400 pF 300 Mica C133...136 4822 l2S 60045 68 pF Trimmer (cer.)
C138,139 4822 12S 60045 68 pF Trimmer (cer.) C142...151 4822 12S 60045 68 pF Trimmer (cer.) C1S3...162 4822 12S 60045 69 pF Trimmer (cer.) C201,202 4822 121 40029 10 nF 2S0 Polyester C204,304 4822 121 40059 100 nF 2S0 Plate capacitor
C206,306 4822 121 40029 10 nF 2S0 Polyester C208,308 4822 121 40056 S6 nF 2S0 Plate capacitor C211,311 904/... 390 pF S00 Choice capacitor C213,313 4822 121 40059 100 nF 2S0 Plate capacitor C214,3 ] 4 4822 121 40047 10 nF 2S0 Plate capacitor
C217,317 (39 nF) 250 Polyester; choice cap. C218,318 904/... 12 pF 500 Choice capacitor C221,321 4822 121 40059 100 nF 2S0 Plate capacitor C302 4822 121 40029 10 nF 1S0 Polyester C401 904/... (39 pF) S00 Choice capacitor
C404,407 4822 121 40059 100 nF 2S0 Plate capacitor C408 4822 121 40036 100 nF S00 Polyester 0409,413 909/G 6.4 6.4 µF 1 SO Electrolytic 0422 904/... 2.7 pF S00 Choice capacitor
CS03,SO4 4822 121 40036 100 nF S00 Polyester CS08 4822 ] 21 40047 10 nF 2S0 Plate capacitor CS 13 4822 121 40036 100 nF S00 Polyester CS 14,51 S 4822 121 40059 100 nF 2S0 Plate capacitor 0604,606 4822 121 40036 100 pF S00 Polyester
37
COILS, RELAYS, TRANSFORMERS
Number Code number Qty Description
Ll, 101, 201 4822 562 10025 6 Bead L202, 301, 302 L401...408 482215810038 8 Coil RE601 4822 280 80234 1 Relay T501 4822 157 50182 1 Transformer
SEMICONDUCTORS
Number Type Qty Description
GR201,206,301,306, BAX16 4 Silicon diode GR202,203,204,208,209 BAY38 16 Silicon diode G R211, 212, 302, 303, 304 GR308,311,312,501, GR502,503
GR207,307 BZY61 2 Zener diode GR401,401 BZY68 2 Silicon diode GR504,506,507,508 AAZl7 4 Germanium diode TS201...402 AFZ12*) Transistor TS403...409 BFY90 6 Transistor TS606...609 BC107 4 Transistor
TS501 AF124 1 Transistor TS502 ASZ21 1 Transistor TS503,504. BSY39 2 Transistor TS602...605 BSY38 4 Transistor
VALVES
Number Type Qty Description
B201,202,301,302. EC1000 4 Triode (should be selected for minimum hum, noise and microphony) Service code: 4822 131 10008.
Note: *Transistors TS203, TS204, TS303, TS304 should be selected for a hfe > 100 at IC = 4 mA and VcEN 3.5 V. TS203-TS204 and TS303-TS304 should be matched having a VBE equal within 5 mV.
Transistors TS206, TS207, TS306, TS307 should be selected for a hfe >_ 70 at Ic = 4 mA and VcEN 4.5 V. TS206-TS207 and TS306-TS307 should be matched having a VBE equal within 5 mV.
38
R4
~-- R 4 ;~ ~_
45 K6 I A
65K 6I F
R219
PEM 3739
Fig. Il. Amplifier, channel A
39
R 6
R 6 --
~ —~ 3 SK6 T A --~
5 SK6 I F
R 319 —~,
PEM 3740
Fig. 12. Ampler, channel B
R355
24V
-iav
+70V
+6 3V
-1 5 0 V
40
—6,3V —24V
R 254
11 SK 5IF 7 SK 5IF
R 359
10 SK SIA
R 521 12 SK SIA
4-55K SIIF 1
Fig. 13. Dual-traee unit
e T S 401
GR401
Fig. 14. Output amplifier
eT5402
PAM a~cz
41
R 631 R 632
+24 V
12V
PEM 2801
._1_ 15 K 6I F Fig. IS. Trigger amplifier
Fig. 16. Drift compensator
—24 V + 24 V R 2 ~'P R 8 F«
—150 V +~ 0 V
GR 206 GR 305
+6,3V
C1 M M M
~"~ OD N N N N ~D M
Q~ ~ ~ ~ ~ ~ ~ (L'
PEM 2802
44
BU1 R270r;-~ 39 ~
i
C 30
— 7~ 39
R 30
R 35 <70 e
R 26
~100KJ SK 4
Q ~
SK3 —► ~~
1
0 T
•
902/A.._
~T 904/...
X
I I SK 4
SK1
2X
w lI sx~ o
• iO 1 10X1
• ~o ~ zo x ~o
w 1 so x ~----o
• w 1 10o x t---o
~ .o (20o x'---b
• b f ! 500 X l-- -O
♦--~P—~ 1000 X F O
• ►O 1 O
~w o
0
Fig. 17. Attenuator, channel A Erratum: C30 scrapped
~~
~ 1 I 1 ..
1
R 203
~ 1X — cz~ ---
1-- — — —
500 X
I I L'~ 1
1 ~
68 sfi
L
C 57
(
I I
I C 29 j I 68 1
I Sc 28. I
~----------J __~~_ __,
1 SX C34 ~
R 28.
L ---------~
20 x C 42
L
1 1oox
_. _ J
I I
I
~ C 52 I C 51 R 43 ~ I
68 T I I
-----J
---_
I I
I ~ C s9 I
R 48 i,, ~ I i I
I _J
X
I I I
I C 33 I 68 I ~-------
I OX C38 — —
I
I
I I
C3g R36
68 1 _
~--------- j
1C 31 1 I
I so x I
I 68 ~
I ~1'1~'' t II R39 C48j V
C47 R4t '~ . T I I 68 a 1 I L ---------~
200 X — — — — ~ — —'~
C 53 I 1
~ `R~ ;n', C 56'
1 C54 R46T ~ '
I 68 ~ I ~ I L ---------~
r000 x I
c as
C61
I
I O~;a I
I
I C62 S1 ~ 1
I 68
~ ~ IL _ __--_--_,! PEM 2808a
• C64 22 R
I C 631
48
SK9 —~
i~ •
9O2/A . . .
T sa4/.._ .
1 X J
I I SK 10
01 0
z x I--~—~--0
sx1
• w—~ 1 o x ~--o
►0 r 20X) O
• ~ ~ sox o
•----+o--~ 10o x I o
b 1200 X 1
•~ ~ 500 X ~---~
•—iO I 1000 X ( O
i O
.o 0
Fig. 18. ~ttenuator, channel B Erratum: C13o scrapped
SK 7
o~~o
1 ~ R 303
i i
1 X 0127 ---,
c,29 68
T C 126 y
R 129
' 6 X C 134
~ 68 ~ r .,-. ~
C 137!
I I i
I C 136 R133
I
L ---------~
20 x ~
I c 142
C 143
68
C 144
R 138
r100X _ _ — --_, C 149
R 142
c 1s1 68
L—~--
00 X
L
C 157
C 1s8
68
R 147 1
.I C 1 ss' R 148 i T
I
R 143 C 152
I' I I
-----~ ----
I
r X C131—_ — ~ ♦ I
lox
C 133 68
C 138
R P31
I
L ---------~
so x c 1 as
L ---------~
~200X ---- ___, C 153
~..L~ ~
156
I` ~ I L---------~
r00~ X — — — ---
~ C 161
Cr~ ~7
163
I L ___ ` ~___ _~ PEM 28O7a
R 149
• C 164 R 151
T2
52
R 337
R 237 ~o
SK 6IA
R603
R60<
+1,3V
+1,3 V
SK6IF
R 232.--~
V
+10 V
T5602 BSY36
R 606
;~>~ R607
N
~~~
R 332
R605
8606
I.2K7F
T5603 BSY36
R609In~i•
~s C
BSY 38 8C 107
10V
Fig. 19. Trigger-amplifier circuit
I~'
~+z c v
1
T
902/A...
902/...
902/P. . .
~T 9oa;. . .
168uY
~ R433
► 32 BuY
► R436
R629
~•22 c 6 0 6= f00K
-1TV
►~ 15KSII A
PEM 2809a
56
11 BuY
12 12
0 10
•-'~ SKSIA • 12~ 012 -~
-t6,2V
~f - -19 V
R511:~ ~a]'S15
c 5 00 47 •
GR507 CSOt 0
,~e`Z a 820 R251 sK5 F
/■
e~z Rsoo 5u • 1 K }--6-0 4
SKSIIF
— 6,a v
+0,6 V _ OV— -~
-1,3V —
R501 F
'o
— I ~~
R502
R505
{0100
TS501
AF 124
0503
9
S5
B
98uY
2
51
t
0
~~/ —1o,e v -14,5 V
AAZ 17 BAY 38
SK11
~5~-~ j ~: TS502
ASZ 21
GR508 C509
~ZN ~~E Rsn~,
ASZ 21 BSY 39
17V
23V
GR501
~~ GR502
R508 ~,
8,9 V r
IG 2N 5 ~
—~
-7, 4 V
-8,4V 0 b R516
R519 r--{ o ,39 6, 3 V
~ 100K=Std
• C511
~~
~~ RSt2 r~~iR513 ~ ' T(~ ~ • ~
33~ ~cs12 T5503 TSSOG
BSY39 BSY39 ~ ~
BAV38
GR503 18, 2 V
BAY38
AF124
R509 n, 0
T~R50~
AAZ 17 O RS': C5i3
100 K
GRSJ6 AAZ17~
SKSIIA
0
-24 V 2 O 0
O Q1
RE 601
0
_t7V -t9V
~ R51 Y
U
►R 259
►R 359
~ C 5~6
8~ F
O SK5`Fa 11 O
O 11 0o SKSIFb ~ o
R 4 01 ~~ O ,
0 0 1
~ SKSIFc
R520
~•~~¢ 2GV
1' ooK
=515
-24 V
PEM 2806 b
Fig. 20. Dual-trace circuit
-tsov +7ov -1:V
rZ I
su1 R27 -1-
Y~ I R30 C26 I R26
l I I ~ sK<i SKLa
J
r — r+a--~ = x---0 SK 3
4uc
i
-~ ~
R 35
• ~ -a.o-• - ~ 5 x~ - -0
-yo--tax---o
~♦tp--~20x -d
~~.r-~ SOX --p
I
~ -io- — ~ 1 oox
♦~0---2001¢-4
~I ~o--_~—~-o
-~P-~ - -0
I`
~
T I
l
r1 Buz I R135
R127 -~-T" 1~
'26~~R126 ~ I I I T 5N10Z SK10II SK7
1 I r—
1C201 IIOK
SK
~20=
+2<V
n R 211
R211
02.
R 213
-uv
t 6Jv
R21C o1Ky~-
SK9
~~ b
~f
~ 2CV
-uv
Fig 21. Y-ampler circuit
A
GR202 BAV3B
R2
R20I
C203 +65V~
~1
+43V R206 1,7V
+1,0 V
o '207 ~R20t
GR203 BAV3B
GR201 BAr3e
R 217 R21e
°82'
GR301 BAVIt
c2oL =100K
C 303
~c O s 100K
1C:D2 =10 K
8201 EC 1000
GR201 BAx1B
~2 I
R221
8213 R12L
1~V 6R206 BAxli
R 119
+1,7 V'I
B2o2 EC 1000
B 65V
r'c2o6 Iz1 1 lOK
-lsov +7ov
56K
RI17
R226
R 225
R 231
l-2Av 1 rsiol A F 212
T5202
+70 v -12V
T
- a~ ~ 303 R301
35K R 306 +17 V
~OSVI
GR 303 BAY3B
cR3ot BAY3t
1psv
R317 R319 °210K~T-x°82
1 c3ot =)OOK
19 ^i
-15ov
C )02 lOK
B 301 EC 1000
GR301 BA%1i
309
R369
C 301
H~ 56K
R)27
Ir1,O5V1R322 /
{0 3?]
8323 R32G
GR 30f BAx1i C307
=ago
B 302 EC1000
/ +66V1
~ 1C3D6 ° 321 )OK
+7ov
R326
8725 -6ov
2,~T5301 AF 211
75302 AFZ12
+lpsv C 322
I.-1 3I~
6 SK6Z F
232 1+1,3V
RI33
55K6 F
0 h R 332 °
R2ii
R2<6
°6801
czu 820
+23~SV
C 213 100 KT
C309
eL209820
T5203 R239
AFZ72
T530[ AFZ12
R 333 R33t
T5303 °68 AFZ72
A.6 V
R33L C311' ~'JJK
35K6Z A
TS 30i AF 212'
rhy R2G7 °
t2<V
3G9
i
-2CV
-<,<V~
C313 ~ GI R3G7
100K
} 2<Y
- 2LV
+•V
-<,GV
SK 2 R252 33
Ilo- Il II II II
II II ~~
8251 II T 270
I~ II I R257
~ ,~
5KB
II II
~~ II
O
C 21L~ lOK=
215
R353
S5
C 31L lOK
C 715 270
0 R25t
I56
-C.G V
R 352 X331
R351
s R 356
8357
°33
1-6<V~
R262
N362
n 216 820
°IK R 25t
T5206 AF 212
TS 07 AF Z12
C 217
&i 68
~ 1 1°IK R35B
T5306 AFZ11
T 5307
R366 °/K
I-10V ~ e
C 319 820
R509
R259 ".~ O
GR211 BAY3B
R516
T
GR711 BAV3t
-3~,7v
GR20B BAV39
-2<Y
GR20~ BAV31
=f00K
GR212 BAY3t
I_'4i 7~
GR30B BAV 3t
-2LV
~a.9y
rs z of AF 212
o R272
T5209 AF 212
18,9V
~~
T 5308 AFZ12
-art2309
BAY3B o R36B O
ry1R367 °~
R3De _
8369 R371
C 321 =100K
..
GR312 I-1/7V BAV3B
SK2 t
3~ j ~~ SO w6
35K57F TS<O1 AFZ12
0 RCDI ` RG02
a
RG040 R<06 ~ R<07 I1aa o
TSLO2
18,tiV RLOS
1001
R<Ot
EC 1000
GRLO1 9ZY iB
T5CO3
-2,8 V R<09
BFYlO -193V
TSA^G eFr90
6R L01 BZY Lt
AFZ 12
+12.SV
w Rlll RC 13
(-19,3V~
-2Lv
~18,7V1
+1 Y
0 1G ~ 8126
BC 107
+z3v~
T540B BFYYI
0 8
BAY 33 BAY 38 BZY 61
RG7)
- iK R¢W1/3 R<)S
1°/2 1BuY
Ruz
Ri 36 °121 17 BuV
R<3<
•-----~°/KS~--~ aE 697/c
TSG09 BFY70
CC07 ry RG19
100K °
+2Gv
61
C0 G
PEM 3603A
PHILIPS PHILIPS
1-2-1969 PM 3342/04/05 Cd 608
P.I.T.-SERVICE
Versions PM 3342/04 and PM 3342/05 are equal to the —/03 version with the exception of the following changes:
I. To facilitate the HF square-wave response adjustments at channel A and channel B, capacitors C 218 and C 318 have been given a
fixed value of 15 pF. The adjustments are carried out by trimmers C 220 and C 320 respectively, which are connected parallel to them.
2. To increase the stability of the final stage, the value of R 405 and R 410 has been increased to 100 S2 (33 S2).
Note: —the following changes were already introduced into the —/03 version.
1. The value of R 233 and R 333 has been increased to 68 S2 (33 52)
2. R 201 and R 301 have been short-circuited. — if, in the parts list, C 503, 504 were denoted 100 pF, it should be 100 nF
and if C 508 was denoted 10 pF, it should be 10 nF
A revised circuit diagram has been added instead of Fig. 21.
Mit Ausnahme folgender Anderungen entsprechen die Ausfuhrungen PM 3342/04 and PM 3342/05 der —/03-Ausfuhrung.
1. Um die Einstellungen der HF-Rechteckwiedergabe an Kanal A and Kanal B zu erleichtern erhielten die Kondensatoren C 218 and
C 318 einen Festwert von 15 pF. Die Einstellungen werden von den parallel zu den Kondensatoren geschalteten Trimmern C 220 and
C 320 vorgenommen.
2. Zur Steigerung der Stabilitat der Endstufe ist der Wert von R 405 and R 410 in 100 S2 (33 S2) geandert worden.
Bemerkung: — Folgende Anderungen wurden bereits in der —/03— Ausfuhrung vorgenommen:
1. der Wert von R 233 and R 333 wurde auf 68 S2 erhoht 2. R 201 and R 301 wurden kurzgeschlossen
— in der Ersatzteilliste wurden C 503, 504 mit 100 pF bezeichnet; dies ist jedoch in 100 nF zu andern; C 508 wurde mit 10 pF bezeichnet, was in 10 nF zu andern ist.
Ein revidiertes Schaltbild ersetzt Abb. 21.
Les versions PM 3342/04 et PM 3342/05 sont identiques au —/03, a 1'exception des points suivants:
1. Afin de faciliter les ajustements aux canaux A et B de la reponse d'onde rectangulaire HF, on donne aux capacites C 218 et C 318
une valuer fixe de 15 pF. Ces ajustements sont realises par les trimmers C 220 et C 320 en paralleles avec les capacites.
2. Pour obtenir une stabilite plus grande de 1'etage de sortie on a mis R 405 et R 410 a 100 S2 (33 52).
N.B. —Les changements suivants ont egalement ete apportes dans la version —/03.
1. R 233 et R 333 sont mis a 68 S2 (33 S2).
2. R 201 et R 301 ont ete court-circuitees. — dans la nomenclature, pour C 503, 504, it est marque 100 pF; cela doit titre 100 nF
et pour C 508 it est marque 10 pF; cela doit titre 10 nF.
Un diagramme de circuit revise a ete ajoute en remplacement de la fig. 21.
9499 448 03201
62 -iSOV +fOV -,:V
r Bit
1R27
1~_~-J
jL- 1
t~L~ - 1r T1 I R30 C26 I 1
I ~ R 26
I ~ T $KG I $K4a
~~. r
l
5K )
Bu<
T~
R 35
r Z,
Bu3
,~ {R 127
- ~I{~~~~
~p--~~-1- ~
~
6+~
R126 I~
T $K10Z SK10II~..1 _ —1 ~r -10- —'{-~} —'Ott-I I r — J
~~o--~ 2 x
~~a-- 5 X --0
~~o--~1oxJ---0
~~--{sox --0
~G7---~ $OX~--0
10- --~ 100X}-- -0
~~P--{200X~--0
-~o--JSOOk---0
~ io-- ~ —
I l
Z
~~ b
SK9 —'
~~f
R 135
r -#-.~ --0 ~io--~ s X~--o
-gyp.—i 10 XJ---O
~~o--~ zox)---0
-ao---{ 5050 X
q
~F --0
}--~0---~-- ~
r - ~ — ~ —
~I _d o— — ~IOOOXF — -0
1 C1D, IIOK
$K1
~R205
+2GV
R 211
R 112
a2tc °2K~
c I~o3~
~~~18 KS '
Ir Y/N L~
A
GR:o2 BAV3{
R2
R 2C3 R20~
GR203
GR20G BAv38
~+i3OV
R 117 R21B °82
c2o<
=100K
RIOT
+66V~—
~5 /00 K
1C2DI
=10 K
8201 EC 1D00
GR201 BAK1{
OR206 BAlI19 '}'C207
~+1,7 VI 1820
H20{
56K
R227
R122
B2oI Ec 1000
B 65v
R21b R219 ~'` ~ ~C206 I21T f0K
-2<V
t 6~Y
$K7 ~~
R305
+2tV
X39)
GR302 BAY3{
-i50V +•V
+70V
R702
~J • 17 '307 R)O4
355K
~V
R30{I+1,7V
~,os
_~
~t)o2
=lOK
8301 EC 1000
GRJ{1 BAK1{
o R307 ',~ R30{
GR303 BAY71
GR30G BAY39
I
R317 R31t °2101( 82
1 c,02, =100K
R 316 R319
-uv
23,s~v ► R369
R 216
8225 65N6T F -6,ovJ
C221
'~~
R 231
+1,0 V~ 1-2pV
is 201 AF Z12
TSI02 AF212
-t2v
R326
l30{
H~-56K
8327 .~! 1
R32I
t~ 33
9 R323 R72<
{^33 GR 30{ BAX1{ [307
w17 VJ =820
8 )OZ EC 1000
~ +65V
1~7~ 0 721 lOK
—tsov s7ev
1,3 V
+1,OSV1
R 725
R331
-2 0 V~ Ts3d~ AF212
T5302 AFZ12
c zo9
820
T5203 R139
°68 AF212
O N Rz37 °
4 $K62 A
55K6 F
R 332 ki,3vR 33)
° 68
8336
1 °33 J- --
~.1,3V
TSIOG AFZ1I
T5303 AFZ12
1530[ AF 212
C213 100 K
C30!
68~R 339
C3 2 820
R247
tZ<V
~2~sV
1
R251 II 215 270
~-4,<VR 152
°33
R25<
Gr~i R256 O
8257
-10 V
R262
ei 16820
~ ~► (°1K R 25t
T520{ AFZI2
T5107 AF Z 12
-10 V
+2cv c 19820
C 313 N R3G7
)OOKT
+uv
-<.4 V 1
-2GV
+24V
9.-'
YNIR351
II
II
II II II
II
0
.4V R 352
I°33
°33
~-4.< V
A 3168
Abe T5306 AF211
-4,1V
T5307 AFZ12
780 I R364
R366 °IK
c ~ F 820
R50{
GR111 B Av3B
R516
GR311 BAV39
-14,7V
GRI09 BAY7{
-22V
~esv1
rs z D9 AF 212
(-15 V
R 269 R271
=100K
GRI11 BAv7e
BAVH
-uv
~GR 309
Bnr3e
ry R367 O
T5209 AF Z72
(t8,9~v
T530B AFZ12
R369 R371
C 317 =100K
GR312 BAY3{
0 ~ R372 O
I-15 V 1
SK1 9
Sc w6
35K51F TSGOt AFZ11
RWG: RG06 ~ RG07 a
rsGot AFZ1Z
r18,6V
R<OS
f00J
EC 1000
GR<O1 BZY4{
TS<03 BFrfo
TSAOG 100 BFYfo
RGOB
m
T
Fig. 21. Y-ampler circuit
Abb. 21. Schaltung des Y-Verstarkers
Fig. 21. Circuit de l'amplhcateur de deviation verticale
RG09
AFZ 12
+12.SV1 18,7V
0 ~RG1G RG Z3
-193V
RG16
-z,ev ~
-zw
T$G06
+12v
BC 107
+23V~
~]—
BAY 33
BAY 38
BZY 61
RU3
R4~5
j° 12
s RG2I
Gn
R<]6
~° /1 9► 17 B ~ v
R<lG
°IK~ -iRE6016
REi01~3
t BuY
TSG09 BFYfO
C607 ^IR<29
)OOK
+2<v
fi
N - ~' -,-~, ~ ,~
S
P
o'~
H~° o~~
f•
c
~'H ~n
w ^< an
~e
r ~ ~
N n
o~ Nr oa
C
+ i
PEM 3643A
PHILIPS
._
D '— Electron optics /Nuclear and electrochemical
equipment / X-Ray analysis /Cryogenic equipment /Test and measuring equipment / Process instrumentation / Industrial Data Processing Systems / Weighing /Welding /Numerical Control / Textile equipment _
15-4-1969
industrial equipment division
PM 3342/05 Cd 620
TEST AND MEASURING EQUIPMENT
Contrary to service information Cd 608, dual trace plug in unit PM 3342/05 obtained during
manufacture FET-input circuits to minimise DC-drift. They are incorporated in 2 printed
circuits, replacing the EC 1000 cathode-followers and compensating tubes previously used.
The printed circuits are separately available for modernising old type plug-ins (see enclosed
instructions.)
Further changes are:
1. C401 is replaced by a 6 pF trimmer paralleled by a 6. 2 pF cer. capacitor.
2. The value of R238, R246, R338 and R346 has been changed to 510 S2.
3. The value of R242 and R342 (68 S2) has been changed to 82 S2
4. The value of R419 (180 S2) has been changed to 56 S2.
5. Capacitors C205 and C305 have been added; C213 and C313 have been removed. The value
of R252, R257, R352, R357 (33 52) has been changed to 120 52; the value of R242 and R342
(68 S2) has been changed to 82 St.
No changes were made in the specifications or in the adjustment procedure. A revised dual
trace circuit (fig. 20) and Y-amplifier circuit (fig. 21) have been added.
9499 448 03501
2
FET INPUT UNIT
FOR DUAL-TRACE PM 3342
Make the following changes for channel A (For channel B select the corresponding parts).
a. At the decoupling unit near the 32 pole plug: remove the connection of the -150 V supply and
load the +6, 3 V supply with 10 52 (10 W) at the drift-compensator print.
b. Remove the connections of the 2 mentioned supplies from the decoupling unit to the amplifier
prints.
c. At the amplifier print, channel A: remove the -150 V supply and the +6. 3 V supply, and
connect C205 (68 nF; plate) between connection C223/R231/c TS202 and earth (C208).
Remove B201, GR201, GR202, GR203, GR204, GR206 and R201, R202, R204, R206, R207,
R208, ft209, R219, R223, L201, L202, C201, C202, C207, C213.
d. At the drift-compensator print: remove B202 and interconnect "1" and "9".
Remove R219 and R319. Change R211 and R216 for resistors 6800 S2 1/8 W 5 %.
e. Mount the FET-unit, using two 3-mm metal spacers and connect it according to the circuit
diagram shown below.
f. Plug the DUAL-TRACE Unit into the basic oscilloscope. Balance according to chapter
XI Bl and B2, and check the square wave response according to F1 and F2.
g. BFWll to be selected at ID ~ 2.5 mA, VDS ti 9 V for VGS ti 1. 7 V
Note: 1. for channel B it is advisable to use a mirrored layout of the circuit.
2. it is recommended to replace C401 by a trimmer 6 pF//5. 6 or 12 pF cer.
3. change the value of R238, R246, R338, R346, to 510 Sl and the value of R252, R257, R352,
R357 to 120 Sl.
4. change the value of R242, R342 to 82 S2
3
Im Widerspruch zu Service-Mitteilung Cd 608, wurde dem 2-Kanal-Einschub PM 3342/05
wahrend der Herstellung Feldeffekt-Eingangsschaltungen hinzugefugt, um die Gleichspannungs-
drift auf das Mindestmass zuruckzufiihren.
Die Schaltungen Sind auf zwei Leiterplatten angeordnet and ersetzen die Katodenfolger EC 1000
and die vorher benutzen Kompensationsrohren,
Zum Modernisieren der bisherigen Einschube (siehe beiliegende Vorschriften) Sind diese
Leiterplatten gesondert erhaltlich.
Weitere 7lnderungen:
1. C401 ist durch einen, von einem 6, 2-pF-Keramikkondensator parallelgeschalteten, 6-pF-
Trimmerkondensator ersetzt worden
2. Der Wert von R238, R246, R338 and R346 ist in 510 52 geandert worden
3. Der Wert von R242 and R342 (68 Sl) ist in 82 52 geandert worden
4. Der Wert von R419 (180 S2) ist in 56 S2 geandert worden
5. Die Kondensatoren C205 and C305 sind hinzugefugt worden, wahrend C213 and C313 entfallen
sind. Der Wert von R252, R257, R352 and R357 (33 S2) ist in 120 S2 geandert worden, wahrend
der Wert von R242 and R342 (68 St) in 82 52 geandert worden ist.
In den Spezifikationen and im Abgleich wurden keine Anderungen vorgenommen. Eine revidierte
2-Kanal-Schaltung (Abb. 20) and Y-Verstarker-Schaltung (Abb. 21) sind hinzugefugt worden.
FELDEFFEKT-EINGANGSSCHALTUNG
FUR 2-KANAL-EINSCH
Fur Kanal A folgende Anderungen vornehmen (fur Kanal B sind die entsprechenden Teile zu
selektieren).
a. An der Entstoreinheit neben dem 32poligen Stecker: Anschluss der -150-V-Speisung entfernen
and +6,3-V-Speisung auf der Driftkompensatorprintplatte mit 10 SZ (10 W) belasten
b. Anschlusse der 2 erwahnten Speisungen zwischen der Entstoreinheit and den Verstarkerleiter-
platten entfernen.
c. Auf der Verstarkerleiterplatte, Kanal A: -150-V-Speisung and +6, 3-V-Speisung entfernen
and C205 (68 nF; Platte) zwischen Anschluss C223/R231/c TS202 and Masse (C208) anschlies-
sen,
Folgende Teile entfernen: B201, GR201, GR202, GR203, GR204, GR206 and R201, R202,
R204, R206, R207, R208, R209, R219, 8223, L201, L202, C201, C202, C207 and C213,
d. Am Driftkompensatorleiterplatte B202 entfernen and "1" and "9" miteinander verbinden,
R219 and 8319 entfernen, R211 and R216 fur Widerstande 6800 St 1/8 W, 5 %andern.
e. Feldeffekt-Eingangsschaltung gemass nachstehendem Schaltbild montieren and hierbei zwei
Metallabstandshalter (Hohe = 3mm.) verwenden
f. 2-Kanal-Einschub in das Grundgerat eisetzen. Gemass Abschnitt XI, Bl and B2 Gleichspan-
nungssymmetrie einstellen and Sprungcharacteristic gemass F1 and F2 kontrollieren
g. BFWll aus zu wahlen fur VDS ti 1, 7 V bei ID ti 2, 5 mA and VDS 9 V.
Anm. : 1. Es empfiehlt Bich, fur Kanal B ein gespiegeltes Layout der Schaltung zu benutzen
2. Weiter ist es empfehlenswert, C401 durch einen 6-pF-Trimmerkondensator unter
Nebenschluss eines 5, 6 oder 12-pF-Keramikkondensators zu ersetzen
3. Wert von R238, R246, R338, R346 in 510 S2 and den von R252, R257, R352, R357 in
120 SZ andern
4. Wert von R242, R342 in 82 St andern.
4
Contrairement ~ la communication de service Cd 608, le tiroir 2 voles PM 3342/05 est,
pendant la production ~quip~ de circuits d'entr~e ~ effet de champ, lesquels diminuent la
drive c. c. Its sont incorpor~s dans les circuits imprimis et remplacent les tubes cathodynes
EC 1000 et les tubes de de compensation pr~c~dement utilises.
Les circuits imprimis peuvent @tre obtenus sGpar~ment; ils servent 3 moderniser les anciens
types de tiroirs (voir instructions ci-jointes).
Autres changements:
1. C401 est remplac~ par un trimmer 6 pF commut@ en paralli3le aver un condensateur c~ramique
6.2 pF.
2. La valeur de R238, R246, R338 et R346 est change en 510 SZ.
3. La valeur de R242 et R342 (68 52) est change en 82 52.
4. La valeur de R419 (180 S2) est chang8e en 56 S2.
5. Les condensateurs C205 et C305 sont ajoutds; C213 et C313 sont ~limin~s. La valeur de
R252, R257, R352, R357 (33 S2) est change en 120 S2. La valeur de R242 et R342 (68 52) est
change en 82 S2.
Aucun changement nest apport~ dans les specifications et dans le r~glage. Un circuit 2 voles
rwise (fig. 20) et un circuit d'amplificateur Y (fig. 21) sont ajoutds.
UNITE D'ENTREE A EFFET DE CHAMP
POUR LE PM 3342
R~aliser les changements suivants dans le canal A (choisir les parties correspondantes pour 1e
canal B).
a. A 1'unit~ de d~couplage pros de la fiche a 3L poles: enlever la connexion de 1'alimentation
-150 V et charger 1'alimentation +6, 3 V avec 10 Sl (10 W) sur la platine de compensateur de
drive.
b. Enlever les connexions des deux alimentations mentionn~es allant de 1'unit~ de d~couplage aux
platines d'amplificateur.
c. Sur la platine d'amplificateur, canal A: enlever 1'alimentation -150 V et 1'alimentation
+6,3 V et connecter C205 (68 nF; type plat) entre la connexion C223/R231/c TS202 et la
masse (C208).
Enlever B201, GR201, GR202, GR203, GR204, GR206 et R201, R202, R204, R206, R207,
R208, R209, R219, 8223, L201, L202, C201, C202, C207, C213.
d. Sur la platine de compensateur de drive: enlever B202 et interconnecter "1" et "9". Enlever
R219 et R319. Changer R211 et R216 pour les resistances 6800 52 1/8 W 5 %.
e. Monter 1'unitd a effet de champ en utilisant deux entretoises m~talliques (hauteur 3 mm) et
la connecter selon le diagramme de circuit ci-dessous.
f. Enficher le tiroir 2 voles dans 1'oscilloscope de base. L'~quilibrer selon B1 et B2 du
chapitre XI et contr8ler la r~ponse d'onde rectangulaire selon F1 et F2.
g. BFW11 ~ selecter pour VGS 1, 7 V ~ ID ~ 2, 5 mA et VDS ~ 9 V.
N.B. : 1. Pour le canal B, it est recommand~ d'utiliser un plan r~fl~chi du circuit.
2. Il est recommand~ de remplacer C401 par un trimmer 6 pF en parallcle avec un conden-sateur c~ramique 5, 6 ou 12 pF.
3. Changer la valeur de R238, R246, R338, R346 en 510 Sl et la valeur de R252, R257, R352, R357 en 120 St.
4. Changer la valeur de R242, R342 en 82 S2.
5
A T T, ~ SK1
. ~
C103
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O
R 2 05
R 203 °
6AX13
8AX16
b
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ezvaa C9V1
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J
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Fig. 1
=ate
33
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BFY90
SIG OUTe
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R222
BFW 11
OC.BAL SIGNAL IN OUT
f
R267 ~ ~ -24V
DC R 224
OUT q~
~33 ~ BFY90 _T 820
Ordering code Channel A: 4822 216 50137 Channel B: 4822 216 50136
Fig. 2
- 24V
SIGNAL IN
D.0 0 U T
MA5266
TS 201
~S 202
MA 5258
+70V (vi°4K7-SSW)
6
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5
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1503
TooK
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9
e
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3
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7
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6
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Y SK11 C507~ 470 I1 ~
C508 I ~~ i
T5502 ASZ 21
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s
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E
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100K =Stl
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• BAY3~ GR502
N
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BSY39 BSY39 ♦-
BAV3B
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8AY38
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R 510 R SO 9
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1 ~R51c
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AF124
5 K SIIA
°
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0 1
RE 601
0
o SK5IFa 0 0
r
0 10
0 07
R 401 ~ 2 0 ~
-24 V
SK 5IF
R520
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100K =515
o Q 0 1
° SK5IFc
PEM 2806 b
Fig. 20
14
~70V -12V
r but R27 -1-
' ~ 11 C203 1~
~ R30 C 6t'1'R26 ~'
~1
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J —1. -~~ moo- — -~ 1 X - — -0r---~-- — — • t
r ~ - ~-SK 3
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i
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b
f
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R212 •-(o2K7~--
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~~ BZYB$I
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GR203=
BAX 16
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C 303 o ~ 1~_ .
SK7 R 303
+2GV
R305
c`o ~C i R 311
R312
BFW it
R 210 0
GR 301
R206 T5212
BFY90
IO2
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T5213 BFW 11
q
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A
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R225
R2o< ~ 20y - -fiAV R:30 ~ HTs 2tt 56K
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BFY90
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BZY88/ C9V1
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a~1
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° 68
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R236
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223 N R237 (+1.3V
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C222° T ~ '~ ~~ 4 SKGI
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255
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GR303 =
BAX16
R 310
•
R327 YI °
R306 TS 312 +IOV
° BFY90
820
R308
1302
•~=100 K
C306
H 39
2K7 R 319
R313
R31G '2
R316
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RB R317 R318 °220K
=100K °
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R 320
22
3 2~
820
R331
TS ~ ~ 33 AFZ12
R309
R 369
R315
R32G °33
TS 314
BFV90
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R329
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3
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ss
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D
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{or2o j
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u~i R256
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s R356
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R361
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