BRUEL & KJAER 1023 User manual
J
Bruel
&
Kjcer
r-
--~
-----"
"
1023
Sine
Generator
Valid
from
serial
no
.
739
1
57
037
-
0226
BROEL & KJA:R
Nrerum -Denmark
037-0226
Consisting of:
1023
Service
Instruction
Technical Description
Checking Procedure
Adjustment Procedure
ZD
0117
ZD
0118
ZE
0151
ZI
0032
Frequency Counter
Output
Circuits, Power Supply
Oscillator Circuits
810ck
Diagram
with
Parts List
1.79
Service
Instruction
1023
1023
Sine Generator
Valid from serial no.
7391
57
page date
0-1
1.79
0-2
5.75
1-1
5.75
1-2
5.75
1-3
5.75
1-4
5.75
2-1
5.75
2-2
5.75
3-1
5.75
3-2
5.75
3-3
5.75
11.75
1
1.79
2
.79
1
1.79
2
1.79
4-1
1.79
Trouble
Shooting
If any
faults
should occur please check
the
instrument
according
to
the
procedure
outlined
below.
When
a
fault
has been traced and corrected,
the
voltages and adjust-
ments influenced by
the
correction
must
be
rechecked. The complete
in-
strument
should
then
be tested according to
the
Checking Procedure to
make sure
that
all basic
functions
are operative.
The tolerances given in these notes are intended
for
use as a guide for
adjustments.
Before correcting any apparent deviation make sure
that
the
measuring
instrument
has tolerances
small
enough
not
to affect the measurements.
Modifications
Due
to
the constant technical progress the
instrument
will
be modified
from
time
to
time
in
order
to
provide
continously
improved performance.
For
this
reason there may be small differencies
between
the
instrument
and
the
Service Instruction.
However, the local Representative Service is in possession of all informa-
tion
regarding the modifications
that
have been made.
Spare
Parts
Please state type and serial
number
of
the
instrument
when
ordering
spare
pa
rts.
0-1
o
()
(JI
()
2pes. Spes.
o
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W
Ul
CD
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CD
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In
BROEL &
KJA::R
Nrerum
-
Denmark
I
I
I
I
I
I
I
lzl
Modulation Frequency
Hz
tuning
On
Technical Description
1023.1
~
_________________________
~
0032
-,
Var.
Osc.
I
Z40
taZOO
kHz
Tl
..---------_01.1/5
;-
_____
.oIB;:..Z'---+-+o
modulation
Out
JZ
H2
FAZ
PZ-
-
--02
fva-;:-20-22Ok~~n-;3Vp-::p-
C2
Frequency Counter
ffix
10
kHz
TTL
-"---------'
Lin
Turn
Off
120
kHz
sine
Lo
g 240
to
200kHz
TTL
Lin:0,5mV/Hz
Otal0V
Log:
IV/Octave
-1
to
10V
~
~
__
. _ _
~O
2..
__
AA
3
_________
_
Compressor
General
I
I
I
---------
Off
Z 3
+15,4
v----f]
Off
Generator
The Sine
Generator
Type
1023
is a high
quality
signal source
which
covers a frequency range from
10Hz
to
20
kHz.
The
output
signal is produced by mixing a Fixed Oscillator Signal
of
120
kHz
with
a Variable Oscillator signal
of
240
to
200
kHz divided by
2.
The Fixed
Oscillator
signal is produced by a
4,88
MHz Crystal Oscillator
which
is divided by 61 and by 2 and
multiplied
by 3
after
which
the
120
kHz
signal
is applied to the Compressor
Amplifier
where
the ampli-
tude
of
the
signal is controlled by a
DC
voltage proportional
to
the Com-
pressor
input
signal.
The Variable signal is created by a Voltage Controlled Oscillator
with
a
frequency range
of
1,2
to
1 MHz
which
is divided by 5. In order
to
linear-
ize and stabilize the VCO, an
error
feed-back
arrangement
has been
made as explained
later
in the description.
The Variable Oscillator signal can have a
linear
or a logarithmic relation-
ship to
the
DC
tuning
voltage of 0
to
10V.
III Lin. mode the tuning
voltage is
0,5
mV
per Hz and in Log mode 1 V per octave
with
OV
at
20
Hz
and
thus
-1
V at
10Hz.
The
output
signal of the Generator can be modulated by applying a pul-
sating
DC
voltage to the VCO.
Modulation
frequencies
of
1 -
2,5
-
6,3
and
16
Hz
can be selected
while
the
frequency deviation is ±10%
of
the
center
frequency up
to
a
maximum
of
±
250
Hz
which
is remained con-
stant
from
2,5
kHz
to
20
kHz
center frequency.
The Block Diagram is extremely
helpful
in case of Trouble Shooting as it
contains
information
about signal levels and
waveforms
between the cir-
cuit
boards.
However,
there
are a
cCJuple
of
circuit
details in the
instrument
that
need
a
further
discussion:
5.75
Valid from serial no.
523774
1-1
1023.1
Technical Description
Modulators
Two
different
types of
modulators
are being used
in
the
instrument.
The
drawing
shows
the
type
which
is used
to
provide
20
to
220
kHz
for
the
Frequency
Counter
and
for
the
Frequency
to
Current
Converter
for
stabi-
lizing and correcting
the
linearity
of
the
VCO.
f1
is applied to
the
base
of
Vl
which
acts as an
ordinary
amplifier
stage
as long as
V2
is
turned
ON by a negative f
2.
When
V2
is
turned
OFF by a positive f2.
Vl
will
not
transfer
any signal
at
all
to
the
output.
In
this
way
f1
will
be chopped
by
f2'
and
V3
and
V4
are
inserted
to oper-
ate in
the
same
way
as
Vl
and
V2
thus
creating a balanced
modulator.
Also
the
Constant
Level
Output
Modulator
ZM
0200
which
can be con-
nected to
the
Fixed and Variable Osc.
outputs
is of
this
type,
where
a sta-
bil
output
amplitude
can be obtained as a
fixed
amplification
is deter-
mined by
the
ratio
between
RC
and
RE.
The next
drawing
shows
a
more
sophisticated type
than
the
previous
one.
It
is used
to
mix
the
fixed and variable
oscillator
signals
in order to
produce
the
final
output
signal
of
the
instrument.
The demands here are
low
noise,
extremely
low
distortion
and a band-
width
on the
output
from
10Hz
to
20
kHz.
Servo
Loop
for
VCO
In
order to
obtain
a
frequency
change
proportional to
tuning
voltage as
well
as a
high
frequency
stability,
a feed-back
arrangement
has been
made.
From
the
Frequency
Tuning
potentiometer
a
positive
current
is applied
to
an Integrator
the
output
of
which
is used
to
tune
the
Voltage Controlled
Oscillator.
The
1,2
to 1
MHz
output
signal
from
this
oscillator
is mixed
with
a fixed
frequency
of
1,22
MHz
thus
producing
a signal
from
20
to
220
kHz.
A Frequency
to
Current
converter
supplies a
current
proportional
to
fre-
quency, and it
now
appears
that
the
VCO
will
be
tuned
to
a
frequency
which
causes
the
negative
current
output
from
the
converter
to be ex-
actly
the
same value as
the
positive
tuning
current.
Frequency
to
Current
Converter
The basic
definition
of
this
converter
is
that:
Current
i = charge Q x Frequency f and
charge Q = Capacitors C x Voltage
V.
This indicates
that
the
stability
of
the
system is
given
by
the
charge Q
which
is created
by
means
of
a
very
stabil ref. voltage V
of
-10
V and a
number
of capacitors
C,
which
are
of
different
temperature
coefficient
for max. stability.
1-2
+Ub
-Ub
450mV
ff
ix
-p W
450mV
p-p
400mV
LF
f
yor
TTL
Freq. Tuning
Integrator
1,22
MHz
-10Vref.
V
---~'"'
charge discharge
III
Freq Tuning
~
C
(temp.
comp.)
0-10V
5.75
The
input
frequency
f is applied
to
a Voltage Comparator
which
pro-
duces
the
square wave signal
a.
When
this
signal is at
OV
the capaci-
tors C are being charged to the ref. voltage
of
-lOV.
A charge 0 is
now
available
on
the
capacitors, and a
moment
later a dis-
charge is stated by means of
the
signal
C.
Each charge 0 supplies a certain
current
into
the Integrator and
the
total
current
will
be
proportional to the frequency f.
Lin.lLog
Converter
When
the
instrument
is in Log position, a
Lin.lLog
converter is inserted
between
the
tuning
potentiometer and the VCO.
As
it
appears
from
the simplified diagram, a
number
of transistors are
connected
in
a
row
with
a reference voltage applied to
the
bases. This
reference voltage is increased
by
approx.
0,5
V steps up
the
row,
and
the transistors
will
now
be
turned
on
as
the
Lin.
input
voltage is in-
creased.
In
this
way
a a parabolla is formed like
shown
on
the
diagram, yet hav-
ing
18
steps instead of 3,
thus
providing a good approximation
to
a
true
log curve.
In connection
with
the Lin
.I
Log Converter, a
temperature
compensating
circuit
is used.
V342
is acting as a temperature detector as
the
forward
voltage across
it
is
temperature
dependent. The voltage drop across
V342
is amplified by
V357,
the
resulting
signal being present across
R356.
By means
of
R342
+
355
is
now
to
the
Linear
input
voltage added a volt-
age
which
is proportional
to
the
forward
voltage across
V342
and
thus
temperature compensated.
a
-IS,4V
b
-IOV
a
c
-IS,4V
+ref.
Lin
5.75
Valid from serial no.
523774
Technical Description
1023.1
Lin
input
Log
t----
.....
---
..
Log
out
1-3
1023.1
Technical Description
Frequency Counter
With
"Counting
Time"
positioned at 1 s
the
principle
of
operation is as
follows:
A Preset sets the Decade Counters
to
8000,0
after
which
the Gate is en-
abled and the Control Time Base disabled.
As
the
Counting Time Base is
actually a
10000
divider the Gate
will
be enabled for 1 s.
On
the trailing edge of impulse no.
10000
the Gate is disabled and
the
Control Time Base enabled. Impulse no.
10001
generates a Transfer sig-
nal
which
leads
the
results
from
the
Decade Counters
out
to
the
7-Seg-
ment Display
through
BCD
to
7-Segment
Decoders/Drivers.
The
trailing
edge
of
pulse no.
10003
produces a Preset, and
the
whole
procedure is
repeated.
When
the Decade Counters have been Preset
to
8000,0
instead
of
0000,0
it
is due
to
the
fact
that
a Gate
input
of
20
kHz should read 0
Hz
and
220
kHz
should
read
20
kHz.
And
20
kHz
during
1 s provides exactly
20000
pulses
which
sets the Decade Counters
to
0000,0.
If
f. inst.
the
Gate
input
is
70
kHz,
the
number
of pulses
during
1
swill
be
70000
of
which
the
first
20000
are used
to
set
the
Decade Coun-
ters
to
0000,0
so
the
final
result
will
be
5000,0
Hz
on
the
Frequency
Display.
When
"Counting
Time"
is
at
0,1 s the counting period is
100
ms only
and the Decade Counters
will
be Preset
to
98000
instead.
"Counting
Time"
1 s is possible up
to
approx.
9500,0
Hz
only at
which
frequency a
Time
Base Cross-Over
Circuit
on
ZI
0032
automatically
switches to
"Counting
Time"
0,1 s.
Blanking
Logic
With
"Counting
Time"
at 0,1 s digit 1 is blanked
when
it
reads 0 and di-
gits 2, 3 and 4 are blanked
when
they
read 0 and
when
the more signifi-
cant digit is already is blanked.
At
1 s
"Counting
Time"
only
digits
1, 2 and 3
will
be blanked
if
they
are
o
thus
leaving the
two
least
significant
digits on all
the
time.
All
digits are blanked
when
the frequency is
tuned
out
of range.
Frequency Marking
By means of a
"Frequency
Marking"
selector on the rear panel
it
is possi-
ble to choose marking intervals controlled by
digits
2,
3
or
4.
Outputs from the respective latch are applied to a
Monostable
Multivibra-
tor in the Frequency
Marking
Circuit.
An
inverted and
non-inverted
input
is used to ensure
that
changes
in
both directions
will
trigger
the
Mono-
stable
which
has an
aoutput
impulse of approx.
10
ms.
On the "Frequency
Marking"
socket on the rear panel a
10
ms signal
will
be provided each
time
the
selected
digit
is changing, and a perma-
nent
signal is provided
whenever
the
digit
is
O.
This
output
can f. inst. be used
to
activate
the
"Event
Marker"
of
a Level
Recorder and in
this
way
plot a non-calibrated paper.
There is a
24
V sensing
circuit
which
allows
Frequency
Marking
only
when
a Level Recorder is driving.
1-4
~01
c: c:
.,.-
".:.:
er'-
.,
0
'-~
"-
Count/Stop
Preset/
Transfer
Enoble
Control
Time Bose
Counting Time
=:J'--
___
S_t_o-'-p
__
--'F
Isec.
---
LJLnJ
Transfer
______
~r-l~
____________
__
Preset
5.75
T
,
BROEL & KJA:R
Nrerum
-
Denmark
Ext. 121
Menuel
Lin
=O,SmVtHz 0
to
10V
lo.~
1V!OchlV@ 1
to
10V
Compressor
V31
Moduletion
Freq.
Hz
tuning
Lin
Log
,",,'
:t
Checking Procedure
1023.2
On
ZI 0032
_
~2_
-------
----
----
----
----
_
---
___
I
Ver.
Osc.
240
to
200 kHz
162
.---
_______
~Xl/S~----"9:"----..--~
modulation
TTL
1
!A2
FA2
Pi
----02-
fVOr20-:i20kH-;~n-;3Vp-p-
--
---
-
C2
-
--
-
---
ffix
10
kHz
TTL
Frequency
Counter
120
kHz
sine
Turn
Off
I'll
240
to
200
kHz TTL
I
I
1
Power 5upp
ly
I
1
_______________
-
__
-
_____________
I
ZE
0151
Fixed
Osc.
-~
120 kHz sine
150
mV
RMS
Load
-~
Generator
Generator:
"On"
Ref. Signal:
"Off"
Sweep Control:
"Manual-Log"
Compressor Speed:
"Off'
Output
Voltage:
"5"
Modulation
Frequency:
"Off"
Output
Attenuator:
"Load"
Counting Time:
"1
s"
rear Frequency Range
Adj.
"Full"
Ref. Signal
to
"On"
Ref. Signal
to
"Off"
Sweep Control
to
"Manual-Log"
5.75
Set Frequency Dial
to
exactly
10Hz
and adjust Scale
Alignment
for
10.0
Hz
on
the
Digital
Frequency Display.
The Display should
now
correspond to
the
position
of
the
Frequency Dial
within
a tolerance
of ±3% of reading
through
the
whole
range.
At
approx.
9500,0
Hz
the
Counting Time is
automatically
changed
to
"0,1
s"
and the deci-
mal
point
disappears.
With
Sweep Control in
"Lin."
mode
the
accuracy between Frequency Dial and Display should
be ±
200
Hz
through
the range.
The Frequency Display should
now
read between
970
and
1030
Hz.
Turn
Frequency Dial
out
of range and check on the
Meter
that
the
Output
signal disappears
and
that
the Frequency Display is blanked.
Connect an RMS reading
Voltmeter
to
"Load"
and adjust
Output
Voltage
for
10
V RMS at an
output
frequency of approx.
1000
Hz.
The
1023
Voltmeter
should
now
read
full
scale ± 2%.
Reduce
Output
Voltage
to
a reading
of
f. ins!.
-2
dB and check the frequency response
to
be
within
±
0,2
dB referred
to
1
kHz
from
10Hz
to
20
kHz.
Turn
Output
Volta~
to
read
10
V RMS deflection
on
the
1023
Voltmeter
at a frequency of
1 kHz.
Connect a
150/10W
resistor
to
the
"Load"
terminals
and check
that
the
output
voltage
does not drop more
than
0,2
dB.
Increase
Output
Voltage and check
that
the
Distortion lamp comes on
at
an
output
voltage
of
. approx.
11,5
V RMS
into
150
corresponding to
an
output
current
of
0,76
ARMS.
Valid
from
serial no.
523774
2-1
1023.2
Checking Procedure
Generator to
"Off'
Compressor Speed to
"30
dB/s"
Compressor Speed
to
"10
dB/s"
Compressor Speed to
"Off"
Modulation
Frequency to
"1
Hz"
Modulation
Frequency
to
"16
Hz"
2-2
Disconnect the
15
n resistor and check the distortion
with
a Frequency Analyzer like f.
inst.
Type
2010.
With
10
V RMS on
"Load"
output the second and third harmonics should remain
at
least
60
dB
below
10
V corresponding to
0,1%
of
distortion. (At frequencies from
20
Hz to
20
kHz,
and
0,15%
at
10Hz).
The remaining noise on
"Load"
output
should be at least
70dB
below
10V
RMS.
Connect
"Load"
output
to the
input
of a
Voltmeter/Amplifier
and AC
output
of
the
Voltmeter
to
"Compressor
Input"
on
1023.
Adjust
Output
Voltage
for
a
19dB
deflection on the
10V
range
of
the
Voltmeter/Amplifier.
Adjust
Compressor Voltage for the same 19 dB deflection corresponding to 0 dB compres-
sion,
When
increasing the
amplification
of
the
Voltmeter/Amplifier
by
10
steps
to
60dB,
the de-
flection on the
Voltmeter/Amplifier
should
remain
at
19
dB.
At
60dB
of
compreSSion the noise
from
the Compr.
Amplifier
will
cause a
slight
instable
reading
which
can be avoided by using a selective
Voltmeter/Amplifier.
Select
60
dB
of
compression.
When
the plug
for
"Compressor
Input"
is taken out, the
Voltmeter
on 1
023
will
move
slowly
up
to
a final deflection
of
approx.
-1
dB, at it should take 4
to
5 s
to
reach
this
final deflec-
tion.
Connect an Oscilloscope (Time Base
0,5
ms)
to
monitor
the
output
signal
from
1023
which
should be
tuned
to appr
lX.
1000
Hz.
The Oscilloscope should
now
show
a sine wave signal
which
is changing in frequency + and
-10%
referred
to
the
center
frequency of
1000
Hz.
The ± 10% frequency deviation should remain
but
with
a
much
faster repetition.
5.75
BRUEL & KJA:R
Nffirum
-
Denmark
Power:
"On"
Output
Voltage
to
"0"
Ref. Signal:
"Off"
Sweep
Control:
"Manual-Lin."
Modulation
Frequency:
"Off'
Counting
Time:
"0,1
s"
rear
Freq. Range Adj.:
"Full"
5.75
Adjustment Procedure
1023.3
If any
adjustment
is
found
necessary
the
voltages
from
the
stabilized
power
supply
should
be
checked as these are a basis
for
correct
adjustment.
However,
it
should
be taken
into
consideration
that
if
the
+
15.4
V
supply
is adjusted a
com-
plete
adjustment
procedure
of
the
item Frequency and Scale
must
be carried
out.
In
many
other
cases as
well,
adjustment
of
one
circuit
will
cause
the
necessity
of
other
ad-
justments.
Therefore
the
procedure is parted
into
main
sections
with
a
certain
order
which
must
be
followed
in
adjustment
as
well
as knob positions.
Throughout
the
measurements
the
common
lead
should
be connected to
ground
as close to
the
measuring
point
as
possible
in
order
to avoid
errors
due
to
currents
in
the
ground
wiring.
It should be noted
that
components
with
100
numbers
will
be
found
on Frequency Counter
ZD
0118,
200
numbers
on
Oscillator
Circuit
ZI
0032,
300
numbers
on
ZE
0151
while
all
400
numbers
are chassis
mounted.
DC
VOLTAGES
Remove top and
bottom
plate
of
the
instrument,
but
leave
the
circuit
boards
in
place.
-19V:!:O,6V
no
adjustment
o 0
Mains
Transformer
+19V±O,3
V l&mV
±2mV
(see
text)
Check +
19
V ±
0,3
V and
adjust
P306
if
necessary.
-lS,4V!O,3V
no
adJ
ustment
Check
--19
V ±
0,6
V (no
adjustment
possibility,
but
affected
by
+
19
V).
Check +
15.4
V ±
30
mV
and adjust
P307
if
necessary.
Check
-15.4
V ±
0,3
V (no
adjustment
possibility,
but
affected by +
15,4
V).
Check + 5 V.±
0,25
Von
the
supply rail on
the
Frequency
Counter
board.
Connect
the
Voltmeter
to
the
two
resistors as
shown
and
adjust
P305
if
necessary for
16
mV
± 2
mV
(avoid a
common
ground
connection
between
1023
and
the
Voltmeter).
Connect the
Voltmeter
to
the
"Load"
terminals
and
adjust
P304
for
0 V ±
10
mV.
FIXED AND VARIABLE OSCILLATORS
The Fixed
Oscillator
is Crystal
controlled
and
not
adjustable,
while
the
Variable Oscillator is a
voltage controlled
LC
oscillator
where
the
adjustment
of
L
determines
only
the
range
of
the
oscillator. and
not
the
output
frequency and stability.
Thus
the
following
procedure
for
adjusting
the
range of
the
VCO
should
be used
only
if
a
fault
has been repaired
in
one
of
the
two
oscillators.
Position
the
instrument
on its
right
end
with
the
front
towards
the
operator and
ZI
0032
swung
out
on
the
table.
Connect
a Frequency Counter
to
"Fixed
Osc."
socket on
the
rear
panel and
chec~
the
fre-
quency
to
be
120
kHz ± 5 Hz.
Turn
P208
fully
clockwise
(from
component
side)
in
order
to enable a Frequency Display be-
low
5Hz.
Connect
a DiWital
Voltmeter
to
ES2
point
on
ZI
0032.
Turn
Frequency Dial
down
to approx. 0
Hz
on
the
Lin. Scale, and
fineadjust
for
0 - 2
Hz
on
the
Digital Frequency Display (Use Scale
Alignment
for
fineadjustment).
The
DVM
should
now
read 8 V ±
50
mV
and
if
not
adjust
L201
from
the
bottom
side
of
ZI
0032
to
such a
position
where
8 V ±
50
mV
is
obtained on
the
DVM
with
0 - 2 Hz on the
Digital Display. (Fineadjust Frequency Dial and Scale
Alignment
if
necessary).
Valid
from
serial no.
523774"
3-1
1023.3
Adjustment Procedure
Ref. Signal:
"Off"
Sweep Control:
"Manual·Lin."
Modulation
Frequency:
"Off"
Counting Time:
As
required
rear Freq. Range Adj.:
"Full"
Sweep Control
to
"Ext.
Electr.-Lin."
Scale
Alignment
to
Mid
position
Sweep Control to
"Manual-Lin."
Sweep Control to
"Manual-Log"
Sweep Control
to
"Ext.
Electr.-Log"
Sweep Control
to
"Manual-Log"
Sweep Control
to
"Manual·Lin."
Generator:
"On"
Ref. Signal:
"Off"
Sweep Control:
"Manual-Log"
Compressor Speed:
"Off"
Modulation Frequency:
"Off"
Output
Attenuator:
"Load"
rear Freq. Range Adj.:
"Full"
Output
Voltage to
"5"
3-2
FREQUENCY AND SCALE
Position the
instrument
on its
right
end
with
the
front
towards the operator and
ZI
0032
swung
out
on the table.
Connect a Digital
Voltmeter
to
a +
15
V
terminal
on
ZI
0032
(common to closest groundpoint)
and fineadjust
P307
on
ZE
0151
for
+
15,4
V ±
30
mV.
Connect the DVM to point
Q2
on
ZI
0032
and adjust
P202
for
-1,35
V ± 3 mV.
Disconnect DVM and
swing
ZI
0032
back
to
its proper position as
this
will
ensure a more ex-
act
adjustment
of the
following.
All
the
potentiometers should be adjusted
through
holes in
the bottom,
while
C273
can be reached from
the
top.
Now
use an
8-pin
plug
JP
0802
for
making a shortconnection
between
pins
2 and 7 on
"Fre-
quency Control Voltage
In"
socket and
another
plug
for
connection
of
a Digital Voltmeter
to
pin 8 and 2 (common) on "Freq. Control Voltage
Out"
socket.
Turn
P208
fully
counterclockwise (from bottom side).
Adjust
P206
for
OV
± 1
mV
on the
DVM.
Adjust
P203
for 0
Hz
±1
Hz
on the Frequency
Display(-
0 V tuning).
Adjust
Frequency Dial for
10V
±2mV
on the
DVM
and adjust
C273
for
20kHz
±20Hz
on
the Frequency Display
(-
1
OV
tuning).
When
switching
between
"Ext.
Electr."
and
"Manual"
P203
and
C273
should be adjusted
until
0 V
tuning
corresponds
to
0
Hz
± 1
Hz
and
10
V
tuning
corresponds
to
20
kHz ±
20
Hz.
The Log Converter positioned on
ZE
0151
is adjusted as follows:
P303
for
20
kHz ±
100
Hz on
the
Frequency Display.
P301 for
20
Hz ±
0,2
Hz
on
the
Frequency Display.
P302
for
632,4
Hz
±
3,5
Hz
on the Frequency Display
with
Frequency Dial adjusted
to
a read-
ing of
5V
± 1
mV
on
the
DVM.
The
three
adjustments
must
be repeated as
they
influence each others.
Tune Frequency Dial
to
exactly
20
kHz
and
adjust
P207
for
10
V ±
10
mV
on the DVM
or
20
kHz
±
20
Hz
on the Display.
Tune Frequency Dial
to
exactly 0 Hz
Lin.
Scale and adjust P201 for
OV
± 1
mV
on the
DVM
or 0 Hz ± 2
Hz
on the Display.
The
two
adjustment
must
be repeated
till
both conditions are obtained.
Finally
P208
should be adjusted
to
such a position
that
an automatic blanking of the Fre-
quency Display takes place at a frequency
between
4,5
Hz
and
5,5
Hz.
If
the
tuning
potentiometer has been replaced P201 should be set
to
mid position and the
potentiometer mechanically positioned to produce
OV
on
the
DVM at OHz Lin. on the scale.
OUTPUT VOLTAGE, METER, MODULATION
AND
COMPRESSOR
Position the
instrument
on its
right
end
with
the
front
towards
the
operator and
ZI
0032
swung
out
on the table.
Connect an Oscilloscope
with
1:
10
Probe to the
junction
between
R235
and
240
and
adjust
trimmer
C272
for
max.
which
should be approx. 4 V peak
to
peak.
Connect an RMS
Voltmeter
to
"Fixed
Osc."
socket.
Now
connect a
10
kn
resistor across
the
terminals
at
L203
and adjust
L202
for max.
120
kHz output.
Connect
the
10
kn
resistor across the
terminals
at
L202
and adjust
L203
for
max.
120
kHz
output.
Finally adjust
P204
for
150
mV
RMS ±
15
mV
on "Fixed
Osc."
socket.
With
Frequency Dial at approx.
1000
Hz
L305
on
ZE
0151
should be adjusted
for
max. de-
flection on
1023
meter.
Connect an RMS
Volt~eter
to
rear
"Load"
socket and adjust
"Output
Voltage"
for exactly
1
OV
RMS on the
Voltmeter.
Adjust
P308
for 1
OV
deflection on
1023
Meter.
Change Frequency Dial to
20
kHz
and adjust P31 0 for 1
OV
-0,1 dB.
5.75
Modulation
Frequency to
"16Hz"
Modulation
Frequency
to
"Off"
Compressor Speed
to
"1000"
Generator
to
"Off'
5.75
Adjustment
Procedure
1023.3
Change Frequency Dial back to approx.
1000
Hz and connect a
15
Oil
OW
resistor
to
the
"Load"
terminals
on the
front.
Now
P31 2 should be adjusted
to
such a position
that
there is no
light
in
the
"Distortion"
lamp
with
10,5
V RMS on rear
"Load"
output
while
at
11,5
V RMS
it
should start
lightening
up.
(10,5
V
into
150
corresponds to
0,7
A).
Disconnect the
150
resistor and connect an Oscilloscope
til
point
AB2
on
ZI
0032.
With
a Frequency Display
of
1000
Hz
P205
should
be adjusted
for
1V peak to peak ± 10%.
Adjust
"Output
Voltage"
for
a deflection on
1023
of
-2
dB
below
full
scale.
Connect
"Load"
socket
to
"Compressor
Input"
and adjust Compressor Voltage
for
-2
dB.
P309
should
now
be adjusted
for
10,5
V ±
0,2
V on
V351
pin 6 'O'hich can be reached only
from
the bottom side.
Connect
"Load"
socket
to
a Selective
Voltmeter
and
adjust
for
an
output
signal of 1
OV
at
1000Hz.
Adjust
C337
for
min.
1000
Hz
output
which
should be approx.
80
dB
below
10V.
Valid from serial no.
523774
3-3
BRUEL &
KJkR
Nrerum
-
Denmark
V106
o
Circu
it
and
Layout
Diagra
ms
w
ith
Parts List
o
--c=J-
R lx x
--
=c=F
- R
1Xx
- -
~
F-
c T xx - - - - - - - - - -
CIRCUIT
COMPONENT
TYPE
DIAGRAM
REF
.
ZD
0118
C 101
El
ec
tr
olytic
22
j.J.
F/
25
V
C
102
Tantalum 1,5
j.J.F
/
35
V
C
103
-
105
Ceramic
47
nFI
30V
C
107
,
108
Polystyrene
620
pF
/ l
00
V
C
109
220
pF
/
125
V
C
110
-
112
Ceramic
47
nF
/
30V
R
110
Car
bo
n 1/ 4 W 5 % 1
kG
R 111 -
115
2,2
kG
R 116 3,3
kG
R
117
-
120
4,7
kG
R 121 8,2
kG
R
122
,
123
12
kG
R
12
4-
128
18
kG
R
129
27
kG
R
130
,
13
1
39
kG
R
132
47
kG
R
133
470
kG
R
13
4 4,7
kG
V
103
-
105
Silicon
NPN
BC
107
V
106
PNP
2 N
2905
V
107
NPN
BSX
20
V
108
BF
337
11
.
75
viewed
from
the
component
side
STOCK
REF .
CE
2002
CF
0008
CK
4470
CT
1109
CT
0501
CK
44
70
RB
3100
RB
3220
RB
3330
RB
3470
RB
3820
RB
4120
RB
41 80
RB
4270
RB
4390
RB
4470
RB
5470
RB
3470
VB 00
32
VB
0059
VB
0513
VB
0545
ZD
0
117
ZD
0118
CIRCUIT
DIAGR
AM
REF .
V
109
-
112
V
114
,
115
V
116
V
117
,
118
V
119
V
120
-
126
V
127
-131
V
133
V
134
,
135
V
136
V
137
V
138
-
142
ZD
0
117
R 101 -
105
R
106
V 101
V
102
102
3
from
serial no.
523774
COMPONENT
TYPE
4 x 2
input
NAND gate
4 x 2
input
NOR gate
3 x 3 i
nput
NAND gate
2 x 4
input
NAND gate
J-K Flip-Flop
Decade
Counter
Bistable Latch
Monostable
Multivibrator
BCD Up/
Down
Counter
J-K Flip-Flop
2-
input
NAND
Buffers
Decoder/ driver
Printed
Circuit
Board
Carbon 1/
4W
5%
2-
Digit
7-Segme
nt
Display
3-Digit 7-Se
gm
e
nt
Display
Printed Circuit Boa
rd
J
ZD0117
~
'l D
0118
I
STOCK
REF.
SN
7400
VD
0002
SN
7402
VD
0003
SN
7410
VD
0006
SN
7420
VD
0007
SN
7472
VD
0011
SN
7490
VD
0013
SN
7475
VD
0015
SN
74121
VD
0022
SN
74192
VD
0028
SN
74107
VD
0031
SN
7437
VD
0047
OM
8880
VD
0060
XC
1172
2,2
kG
RB
3220
1
MG
RB
6100
VA
0097
VA
0098
XC
1171
VI02
2/lkA
Rl01
'8:
b
• c
•
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bed
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kn.
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101
6 7
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R104
B
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13
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11
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10
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RID5
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SN7410
V116
SN7420
V117,118
SN7472 VI19
SN74121
V133
SN74107 VI36
SN7437 VI37 SN7490
V1Z0
-126
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7475 Vq7-131 SN 14192
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C
302
.
303
C
304
C
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C
308
.
309
C
310
C 311
C
312
C
313
C
314.315
C
316
C
317-319
C
320
C 321 -
324
C
325
C
326
C
327.328
C
329
C
330
C 331
C
332
.
333
C
334
C
335.336
C
337
C
338
C
339
C
340
C 341
1
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1---
I
I
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I
Electrolytic
Ceramic
Electrolytic
Tantalum
C
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Polycartonate
Polystyrene
Trimmer
Ceramic
Polycarbonate
C
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Tantalum
Circuit
and Layout
Diagrams
with
Parts List
viewed
from
the
component
side
220
f.lF
I
6V
CE
0208
L
301
Coil
100f.l
FI
16
V
CE
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302.303
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V
CE
0336
L
304
10
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305
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2200
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100f.lF
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301.302
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47
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303
15
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1150
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304
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P
306
.
307
10
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P
308
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1150
P
309
10
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400
V
CK
1100
P
310
33pF
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1330
P
312
1
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I
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304
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10
22
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250
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CS
0400
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307
-
310
Ge. AAZ
17
47
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250
V
CS
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311
-
318
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400
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1011
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319
.
320
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16
620
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323
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1140
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325
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326
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12
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I
63
V
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327
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328
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12
50
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63
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329
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63
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CV
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330
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22
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CS
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33
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CK
1330
33
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I
10V
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0034
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0
151
1023
from
serial no.
739157
ZE
0151
30f.lH
LJ
0008
112
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LB
0852
52
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LB
0851
LB
0853
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lin
.
22
0
PG
0222
100
0
PG
1105
220
0
PG
1221
470
0
PG
1509
1 kO
PG
2108
10
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PG
3109
22
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3221
4.7
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2470
470
0
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1504
1200
V/
150
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QV
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50
V/
250
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0101
200
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15'0 V/
300
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400
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-
7.5
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1106
11.4-1
2.6
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1353
8.0-8.8
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1329
13.8-15.5
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1325
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.
~
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95
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Cl22
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61.9.11.
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Load
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799,SkA
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R415
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5,8A
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11419
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R415
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30
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R412
R413
R410 R408 11406 R404
R402
11411
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73915?-13
.
1.2
.
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023
ZE
0151
R 301
R
303
R
304
R
306
R
307
R
308,309
R
310
R 311
R
313,314
R
315
R
316
R
317
R
318,319
R
320
R
321,322
R
323,324
R
325
R
326
R
327
R
328
R
329
R
331,332
R
333
R
334
R
340,341
R
342
R
343
R
344,345
R
346
R
347-352
R
353
R
354
R
355,356
R
357,358
R
359
R
360,361
R
362,363
R
364
R
365
R
366-369
R
370
R 371
R
372
R
373
R
374-381
R
382
R
383
R
384-386
R
387,388
R
389-391
R
392
R
393
R
395,396
R
397
R
398
R
399
R
3100-02
R
3103
R
3104,05
R
3106
R
3107,08
R
3109,10
R
3111,12
R
3113,14
R
3115
R
3116
R
3117
2
Carbon
Metal
Wire
Thick
film
NTC
1/4W
5%
10%
5%
1%
1 W
5%
2W
10%
3W
5%
O,5W
10
0
10
0
39
0
120
0
560
0
1
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1,2
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1,8
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2,2
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3,3
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3,9
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6,8
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10
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12
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15
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18
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2,7
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3,3
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10
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68
kO
82
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100
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1,8MO
4,7
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10,2
0
61,9
0
24,9
0
100
0
150
0
1
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1,13
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1,24
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1,50
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1,58
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1,69
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2,80
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3,01
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3,65
kO
4,12
kO
5,11
kO
5,90
kO
1,78
kO
7,50
kO
7,15
kO
10,2
kO
10,7
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10,5kO
10,7
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12,1
kO
15.4
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40,2
kO
20,5
kO
30,1
kO
32.4
kO
45,3
kO
71,5
kO
95,3
kO
137
kO
191
kO
280
kO
301
kO
0,8
0
0,33
0
610
0
470
0
RB
1100
RB
1100
RB
1390
RB
2120
RB
2560
RB
3100
RB
3120
RB
3180
RB
3220
RB
3330
RB
3390
RB
3680
RB
4100
RB
4120
RB
4150
RB
4180
RB
3270
RB
3330
RB
4100
RB
4680
RB
4820
RB
5100
RB
6180
RB
3470
RF
1102
RF
1619
RF
1249
RF
2100
RF
2150
RF
3100
RF
3113
RF
3124
RF
3150
RF
3158
RF
3169
RF
3280
RF
3301
RF
3365
RF
3412
RF
3511
RF
3590
RF
3178
RF
3750
RF
3715
RF
4102
RF
4107
RF
4105
RF
4107
RF
4121
RF
4154
RF
4402
RF
4205
RF
4301
RF
4324
RF
4453
RF
4715
RF
4953
RF
5137
RF
5191
RF
5280
RF
5301
RO
1103
RO
1220
RX
0323
RZ
0024
RZ
0025
RN
0015
V
301-303
V
304
V
305-307
V
308
V
309,310
V 311
V
312
V
313-315
V
316
V
318-320
V
321,322
V
323
V
324-342
V
343-345
~
346-348
V
350
V 351
V
352-356
V
357,358
V
359
V
360,361
Silicon
-(Matched set)
J-K
Flip-Flop
Op, amp,
Printed Circuit Board
8-pin Socket
16-pin Socket
NPN
PNP
NPN
PNP
NPN
PNP
NPN
NPN
PNP
BC
107
2 N
2905
BF
199
BC
177
BC
107
2 N
4249
BC
107
BCY
87
2N4249
TIP
110
--
',TIP
115
SN
7472
LM
308
LM 301
LM
308
LM
725
LM
318
VB
0032
VB
0257
VB
0032
VB
0257
VB
0032
VB
0059
VB
0065
VB
0071
VB
0032
VB
0108
VB
0257
VB
5302
VB
0114
VB
0555
VB
0115
VD
0011
VE
0046
VE
0044
VE
0046
VE
0047
VE
0050
XC
1174
JJ
0804
JJ
1622
1.79
BRUEL
&
KJ,.<tR
Nffirum
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I
1
I
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I
I
1
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\
I
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c I
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Q I
a v I
I
I
Circuit
and
Layout
Diagrams
with
Parts List
ZI0032
\
• I
• I
0 1
I
I
I
I
-----------
-----
viewed
from
the
component
side
C 201 -
212
Electrolytic
22
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I
25
V
CE
2002
C
266.
267
Polystyrene 1
nF
I
63
V
CT
1170
C
213
-
216
Tantalum
22JiF
I
16V
CF
0031
C
269
4,7 nFI
63
V
CT
1508
C
217
-
229
Ceramic
33
pF
/
400V
CK
1330
C
270
22
nFI
63
V
CT
1517
C
230
6,8
pF
/
400
V
CK
0681
C 271 Ceramic
12
pF
/
400
V
CK
0095
C
231
-
234
47nF
/
12V
CK
4471
C
272
Trimm
er 5-
25
pF
I
50
V
CV
0025
C
235
30
pF
/
400
V
CK
0105
C
273
1,5-3,5
pF
/
500
V
CV
0021
C
236
4
pF
/
400
V
CK
0097
C
274
Ceramic
33
pF
/
400
V
CK
1330
C
237
Mic
a
450
pF
/
350
V CM
0004
C
238
-
240
Polycarbonate
10
nF
/
250
V
CS
0394
L
200
Coil
LB
0707
C 241
100
nF
/ l
00
V
CS
0409
L
202
,
203
LB
0769
C
242
220
nF
/
l00V
CS
0389
L
204
Filter
Choke
30JiH
LJ
0008
C
243
1
JiF
/ l
00
V
CS
0384
L
205
6
JiH
LJ
0010
C
244
Polystyrene 1
JiF
I
50V
CS
0241
L
206
160
JiH
LJ
0016
C
245
Polycarbonate
470
nF
/
l00V
CS
0383
C
246
10JiF
/
63V
CS
0399
P 201
Trimmer
Cermet
lin
.
22
0
PG
02
22
C
247
,2
48 47
nF
/
250
V
CS
0401
P
202
100
0
PG
1105
C
249
Ceramic
33
pF
/
400
V
CK
1330
P
203
500
0
PG
15
10
C
250
30
pF
/
400
V
CK
0502
P
204,
205
1
kO
PG
2108
C 251 Polystyrene
92
pF
I
63
V
CT
1550
P
206
22
kO
PG
3221
C
252
-
255
100
pF
/
125
V
CT
1133
P
207
100
0
PG
1105
C
256
-
258
220
pF
/
125
V
CT
1141
P
208
22
kO
PG
3221
C
259
250
pF
/ l
00
V
CT
1117
C
260
.
261
560
pF
I
63
V
CT
1122
Q 201 -
208
Silicon
1 N 4 1
48
75
VI
75
mA
QV
0216
C
262
402
pF
/
l00V
CT
1115
Q
209
VDC 1 N
3023
QV
1332
C
263
-
265
470
pF
/ ,l
00
V
CT
1111
ZI
0032
Q
210
Silicon
1 N
4148
75
VI
75
mA
QV
0216
1.
79
1023
from
serial no.
739157
ZI
0032
R
200-202
R
203
R
204
R
205-215
R
216
R
217,218
R
219-228
R
229
R
230
R
231-234
R
235-237
R
238,239
R
240-242
R
243,244
R
245
R
246
R
247-250
R
252-254
R
255
R
256
R
259
R
260
R
263
R
264
R
265-270
R 271
R
273
R
274,275
R
276,277
R
278-280
R 281
R
282
R
283,284
R
285-289
R
2100
R
2101,02
R
2103-05
R
2106,07
R
2108
R
2109-11
R
2112
R
2113
R
2114
R
2115
-R
2116
R
2117,18
R
2119
R
2120
R
2121
R
2122
R
2123-28
R
2129
R
2130
R
2131
R
2132
R
2133
R
2134,35
R
2136
R
2137,38
R
2139,40
R
2141
R
2142
R
2143,44
R
2145-48
R
2149
R
2150
R
2151
R
2152
R
2153,54
R
2155,56
R
2157
R
2158
R
2159
2
Carbon
1/8W
10%
1/4
W
5%
Metal
1%
10
MO
33
0
47
0
100
0
270
0
680
0
1
kO
1,2
kO
1,5
kO
2,2
kO
3,3
kO
3,9
kO
4,7
kO
5,6
kO
6,8
kO
8,2
kO
10
kO
10
kO
12
kO
15
kO
22
kO
27
kO
56
kO
82
kO
100
kO
120
kO
150
kO
220
kO
1
MO
4,7
MO
10
MO
1
kO
20MO
1
kO
4,99
0
464
0
1
kO
1.24
kO
1,3
kO
1,43
kO
2,49
kO
9,53
kO
2,87
kO
4,32
kO
4,87
kO
5,11
kO
5,62
kO
7,15
kO
9,53
kO
121
0
10
kO
10,5
kO
12,7
kO
13,3
kO
15
kO
16,5
kO
15,4
kO
17,8
kO
21,5
kO
30,1
kO
40kO
40,2
kO
49,9
kO
100
kO
130
kO
150
kO
158
kO
2,87kO
549
0
12,1
kO
400
kO
4,42
kO
5,23
kO
RB
7100
RB
1330
RB
1470
RB
2100
RB
2270
RB
2680
RB
3100
RB
3120
RB
3150
RB
3220
RB
3330
RB
3390
RB
3470
RB
3560
RB
3680
RB
3820
RB
4100
RB
4100
RB
4120
RB
4150
RB
4220
RB
4270
RB
4560
RB
4820
RB
5100
RB
5120
RB
5150
RB
5220
RB.6100
RB
6470
RB
7100
RB
3100
RH
0903
RB
3100
RF
0499
RF
2464
RF
3100
RF
3124
RF
3130
RF
3143
RF
3249
RF
3953
RF
3287
RF
3432
RF
3487
RF
3511
RF
3562
RF
3715
RF
3953
RF
2121
RF
4100
RF
4105
RF4127
RF
4133
RF
4150
RF
4165
RF
4154
RF
4178
RF
4215
RF
4301
RF
0279
RF
4402
RF
4499
RF
5100
RF
5130
RF
5150
RF
5158
RF
3287
RF
2549
RF
4121
RF
0205
RF
3442
FF
3523
V
201-211
V
213-215
V
216
V
217-220
V
222,223
V
224
V
225
V
226,227
V
228,229
V
230
V 231
V
232
V
233-235
V
236,237
V
238
V
239
V
240-251
V
252,253
X 201
Silicon
FET
2-input
NOR-Gates
4-input
NAND-Gates
J-K
Flip-Flop
Decade-Counter
D-Flip-Flop
Dual
J-K
Flip-Flop
2-input
NAND
Buffer
Voltage Comparator
Op.-Amp.
Op.-Amp.
Quartz-Crystal
Printed Circuit Board
Socket
for
transistor
8-pin
Socket
14-pin
Socket
16-pin Socket
NPN
PNP
NPN
N
BC
107
2 N
2905
BC
177
BSX
20
BCY
89
NF
510
2 N
4393
SN
7400
SN
7420
SN
74L72
SN
74L90
SN
7474
SN
74107
SN
7437
LM 311
LM 301
LM
308
4,88
MHz
VB
0032
VB
0032
VB
0059
VB
0071
VB
0513
VB
5304
VB
1021
VB
1056
VD
0002
VD
0007
VD
0049
VD
0050
VD
0018
VD
0031
VD
0042
VE
0024
VE
0017
VE
0046
MB
0012
XC
1173
JY
0007
JJ
0804
JJ
1408
JJ
1622
1.79
Other BRUEL & KJAER Inverter manuals
