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GoldSt
ASK & CO. ELEKTITONIKK
LYNGBOVEII:N 52
t-nxst-'.vAc
TLF.55 3448 93 FAx 55 34 I i l0
OSCILLOSCOPE os-g020P
SERVICE
MANUAL
I GoklStor Jrrecision Go.,LtGl.
GoldSt
OSCILLOSCOPE os-g020P
SERVICE
MANUAL
ASK & CO. I'I,I.]KT'RONIKK
LYNGB['VEIEN52
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TLF. 344tt93 FAX 341l 10
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l 7
Servicing Precautions
Please read alI instructions in the service rnanual throughly
before servicing.
Disconnect power cord fron power source before opening the
enclosure.
Instructions
1. To naintain the precj"sion and reliabili.ty of the product use it.
2. After turning on power, please allow a 1S-ninute per-heating period
before use.
3. Triple-Iine power cord is to be used for the product. But when you
are using the doubleline cord, make sure to connect the earth terninal
of the product to the earth at the power source for safety.
4. For quality inprovenent the exterior design and specifications of the
product can be changed without prior notice.
Warranty
Warranty service covers a period of one year fron the date of original
purchase.
In case of technical failure within one year, repair service wiII be
provided by our service center.
We charge for repairs after the one year warranty period expires.
when the failure is a result of user's neglect, natural disaster or
accident, we charge for repairs regardless of the warranty period.
Notice
This Serivce Manual describes the most typical product of this model.
If there are any specific differences between this Manua] and the
servi.cing unit, please contact GoIdStar Precisj.on Co.. Ltd.
(iol-dStar Preci-siorr Co-, I-td.
-2-
CONTENTS
]-. SPECIFI CATI ON
2. ACCESSORIES
3. PREVENTI\/E MAINTENA\ICE
4. CIRCIJIT DESCRIPTION. 7A
5. CAI-IBRATI ONI . 13
5-1. Calibration Interval .. 13
5-2, Test Equipment Required 13
5-3. Prelininary Procedure .. 13
5-4. Prelininary Control Settings .... ....... 14
5-5. Initial Starting Procedure 14
6. SEMI COI\IDtTCTOR I-EAD
CONFI GTIRATI ()1\I 24
7- EI-ECTRI CAI- PARTS ARRAAIGEMEIVT
(WITFI ADJTISTMENT I-OCATIONS) 25
A- EI-ECTRI CAI- PARTS I-I ST 27
9. BI-OCI{ DIAGRAM. 43
Lg. SCI{EMATIC DIAGI?AMS ....... 44
1 -1 - . WIRTNG DIAGRAM . 58
L2. MECFIANI CAI- PARTS I-I ST & EXPI.-ODED
vI EW 59
A3. EX:TERNAI- VIEWS 62
-4-
1. SPECIFICATIONS
PART SPECIFICATIONS
' CRT
1) Configration and 6-inch rectangular screen with internal graticule ; 8x10 Div
useful screen ( 1 div = 1 Cn ) , marking for neasurenent of rise tine.
Znm subdivisions along the centraL axis.
2) Accelerating potential. +1.9KV approx. (ref. cathode)
3) Phosphor P43
4) Focussing possible
5) Trace rotatj.on provided
6) Intensity control provided
r Z-Axis input
(Intensi ty Modulation)
1) Input signal Posi.tive going signal decreases intensity +svp-p or nore signal
cases noticeable nodulation at nornal intensity setti.ngs.
2) Band-width DC - ZMHz (-3dB)
3) Coupling DC
4) Input inpedance ZAK - 30Kohns
5) Maxinun i"nput voltage 30V ( pQ+pgak AC )
r Vertical Deflection
1) Band-width (-3dB)
DC coupled DC to ZAMHz nornal
DC to IAMHZ magnified (CH1 only)
coupled LbHz t o ZLllHz nornal
lAHz to MlllHZ nagnifj.ed (CH1 only)
Modes CHl, CHZ, ADD. DUAL ( CH0P ; Tine,/div switch - A.Zs to 5nS ,
ALT ; Tine,/div switch ZnS to 0.ZuS )
Deflection Factor SnV./div to SV,/div in 10 calibrated steps of a l-2-5 sequence.
Continuously variable between steps at least I:2.5
x5 MAG; lnV,/div to 1V,/div in 10 calibrated steps. (CHl only)
4) Accuracy nornal x3% magnified t 5% (CH1 only)
5) Input inpedance approx. lM-ohn in paralIeI with 30pF
6) Maxinun input voltage DirectiZSAV (Dc+peakAC),with probe;refer to probe specification
7) Input coupling DC-GND-AC
-5-
PART SPECIFICATIONS
;
1)
8) Rise tine 17.5nS or less(35nS or less; xb MAG)
9) CHl out Z5nV/divXZA% into 50 ohns ZAHz to t0llHz( -3dB )
10) Polarity invertion CH2 only 2)
r Horizontal Deflection 3)
1) Display nodes A X-Y , xlt VARIABLE tC
2) Tine base b.2us/div b A.ZS/div in 19 calibrated steps, L-2-5 sequence.
uncalibrated continuous control between steps a t l e a s t 1 : 2 . 5
t,
3) Sweep nagnification 10 tines (naxinun sweep rate ; ZLnS/div) 1)
Note ; 50nS,/div.ZLnS/div of TIME BASEare uncalibrated.
4) Accuracy t3%, f.5% QC to 40C), additional error for nagni.fier t2%
r Trigger Systen
1) Modes auto, norn, TV-V, TV-H
2) Source INT ( CH1,CHz,VERT ) LINE , EXT
3) Coupling AC
2)
4) Slope for-
3)
5) Sensitivity and I
Frequency 20Hz-ZMHz ZAHz-ZAMHz
1)
AUTO,
NORM INT (VERT) 4 . 5 d i v Q . A ) 1.5 div (3.0)
2)
EXT 0.2 llp-p 0.8 Vp-p
rE
t
1)
TV-V, TV-H at Least 1 di"v or 1. 0Vp-p
6) External trigger
2)
Input inpedance approx. 1 M-ohn
Max. input voltage 250V ( DC + paek AC )
3)
4)
5)
PART SPECIFICATIONS
* X-Y 0peration
1) X-axis (same as CHl except for the following)
Deflection factor ; sane as that of CH1
Accuracy ; X5%
Frequency response; DC to SAAKHz ( -3dB J
2) Y-axis sane as cHz
3) X-Y phase difference 3' or less ( at DC to 50KHz )
* Calibrator (probe adj.) \KHz(+ZAD frequency, 0.5V(XLT%) square wave
duty ratio : 40 - 6A%
* Power supply
l) Voltage range voltage range fuse
lAA(90-rlgv)/AC 2A25AU
r20 (108 - r32V) / AC zA25AV
229 (r98 - 242V) / AC A25AV
244 Qrc - Z50V) / AC Az5AV
2) Frequency 5A / 6AHz
3) Power consunption approx. 35W
t Physical Charac.
1 ) Weight 7.SKe
t\ Dimension 320 nn (W) x l4A nn (H) x 43A mn (L)
r Environnental Charac-
teri sti c
1) Temperature range +10' C to +35' C ( +50'F to +95'F )
for rated operation
2) llax. ambient 0'C to +40" C ( + 3 2' F t o + 1 0 4 ' F )
operating tenperature
3) Max. storage -2A"Cb +7A"C ( -+"Fto+158'F)
tenerature
4) Humidity range for 45% to 85% RH
rated operation
5) Max.anbient 35% to 85% RH
operating humidity
-7-
2. ACCESSORIES
(1) Operation nanual
(2) Probe (option)
(3) Spare Fuse
(4) Power cord
-8-
3- PREVENTT VE MAT NTENAAICE
Preventive maintenance, when perforned on a regular basis, can prevent
instrunent breakdown and may improve the reliability of the oscilloscope.
The severity of environnent to which this instrument is subjected will
deternj.ne the frequency of naintenance. A convenient tine to perform
preventi.ve maintenance is preceding recalibration of the instrunent.
Disassenbly
Renove the screws in the top cover of the instrument. Gently seperate
the top cover fron the instrunent and Iay aside. Most of the internal
parts of the instrunent are now accessible.
Cleaning
The instrument should be cleaned as often as operating conditions
require. Accumulation of dirt in the instrument can cause component
breakdown.
The covers provide protection against dust in the interior of the
instrunent. Loose dust accunulated on these covers can be renoved with
a soft cloth or snall brush.
Dirt that renains can be removed with a soft cloth danpened in a nild
detergent and water solution. Abrasive cleaners should not be used.
Cleaning the interior should only be occasionally necessary. The best
way to clean the interior is to blow off the dust with a dry, low-
velocity strean of air. A soft-bristle brush or a cottontipped
applicator is useful for cleaning in narrow spaces or for cleaning nore
delicate conponents.
Visua1 Inspection
The instrunent should be inpected occasionally for such defects as
brocken connections, improperly seated transistors, danaged circuit
boards, and heat-danaged parts. the corrective procedure for nost
visible defects is apparent ; however, particular care nust be taken
if heat-damaged conponents are found. Overheating usually indicates
other trouble in the instrument ; therefore, correcting the cause of
the overheating is inportant to prevent recurrence of the damage.
-9-
4. CIRCT]IT DESCF?IP:trION
The block diagran ( page 43 ) shows the overall relationship between all
of the circuits. Conplete schematics of each circuit are also given in
section schnatics diagrans ( page 44 to 57 ).
Refer to these diagrams throughout the following circuit description for
electrical values and relationship.
ATTENUATOR (1)
Signals applied to the input connector can be either AC coupled or DC coupled,
or they can be disconnected to +he internal circuit when 5901 ( 5902 ) is
GND position.
Attenuation is deternined by the setting of the V1LT / DIV switch.
The attenuator that is controlled by the VlLT / DIV switch has ;2, +4,
+lA, +tAA circuit.
+ 2 , + 4 , = 1 0 c i r c u i t s a r e i n R A 1 0 1( R A I A Z) a n d = 1 0 , + L A A c i r c u i t s
are between S101-AZ ( StgZ-AZ ) and 5101-82 ( SLg2-82 ).
CH1 ( CHz ) IT.TPUT
A}IPLIFIER (2,3)
Signal fron the input attenuator is connected to source follower Q101
( 0105 ). When excessively high-anplitude signals are applied to the source
follower, the signals wiII be Q103 ( 4106 ) and the gate-source junction of
Q101 ( 0105 ). When 5801 is open ( x SMAG the signal that
),
is feed back to 0P AMP through R109 anplfies the output signal of
Q104 by 5 tines.
And the signal of QZAG ( 0306 ) base is converted fron a single-ended simal
to a paraphase signal by differential anplifier.
CH1 ( CHz ) PREAilP& TRIGGERPICK OFF
Vertical preanp circuits provide control of vertical position.
They also contain a stage to provide a sample of the input signal to the
trigger preanp circuit for internal triggering fron the CH1 or CH2 signal
only. And the trigger preamp of CH1 provides the CH1 input simal to the
horizontal anplifier in the X-Y position of the TIIIE / DIV switch.
The trigger preanp circuit anplifies the internal trigger signal to the
level necessary to drive the trigger generator circuit.
VERTICALCON'IBOL
The vetical switching circuit determines the input signal or conbination of
input signals to be connected to the vertical nain anp.
Input signal combinations that can be displayed are selected by D FLIP-FLOP
that is controlled by the vert.ical node switches and the X-Y position of
the TIME / DIV switch.
In the ALT and CHOPmodes, both channels are alternately displayed on a
shared tine basi.s.
_IA_
VERTICAL
MAIN AMPLIFIER (7 )
T h e v e r t i c a l n a i n a m p l i f i e r c i r c u i t p r o v i d e s the final naplification for
t h e v e r t i c a l d e f l e c t i o n s i g n a l b e f o r e i t i s applied to the vertical
deflection plates of the CRT.
TRIGGER
AMPLIFIER (8)
The Trigger Anplifier circuit produces trigger pulses to start the sweep
generator circuit.
The Trigger Generator circuit consists of the trigger source, trigger
node switch, TV synchronization circuit, trigger amplifier, U109 and
etc. The Trigger Source Switch selects one signal of the signals fron the
vertical trigger preanps, power line source applied to this instrument,
external trigger input BNC connector connected to front panel.
The Trigger Generator Circuit has the circuit to control the trigger level
and slope.
The signal type is AC.
The Trigger mode Switch determines the operating mode for the trigger generator
ci rcui t.
In the N0RMnode, the sweep signal is generated only the trigger signal
is generated, 0peration in the AUTO, TV-V mode is the sane operation
as N0RMmode, except that a free running trace is displayed when a trigger
pulse is not present or the aplitude of the trigger signal is not adequate.
The Base Signal of Q130 which enters through three switches, Q34? and
etc is amplfied by Q345, Q346.
The anplfied signal, the collector signal of Q346, enters the N0.2 pin of
U109, outputs in N0.8 pin of U109.
The N0.8 pin signal of U109 is called trigger signal or trigger pulse.
SWEEP
GENERATOR (9)
Sweep generator circuit consists of sweep gate circuit and niller integrator.
The sweep gate is on, a very little negative going signal is generated in
the gate of Q129, input Miller Integrator, by R-C network.
The signal in the gate of Q129 is anplified by Miller Integrator, the
amplified sj.gnal appear in the Enitter of Q342, is ca]Ied sweep signal and
enters the Base of Q327 through R551.
This sweep signal is generated on comnend ( trigger pulse ) fron the trigger
generator circuit.
The sweep gate circuit produces an unblanking gate to unblank the CRT during
sweep time.
- 11 -
HORIZOT.ITAL
OUIPIJTAilPLIFIER (12)
The Horizontal Output Anplifier provides the final signal anplification to
drive the CRT horizontal deflection plates.
The Horizontal 0utput Anplifier consists of five cascade stage anplifiers.
The first stage horizontal main anplifier has a low input inpedance and
require very little voltage change at the input to produce the desired
output change.
The ouput signal fron cornplenentary arnplifier }IZS, Q127drives the right
horizontal deflection plate.
The output signal from conplenentary anplifier e126, Q128drives the left
horizontal deflection p1ate.
The Horizontal Output Anplifier has the horizontal magnification and the
horizontal position functions.
In all position of the TIIIE / DIV select switch except X-Y the input signa]
of the horizontal output anplifier is the sawtooth signal from the sweep
generator. In the X-Y position of the TIME / DIV select switch the input
signal of the Horizontal Output Anplfier is the signal fron the channel I
preamp circuit of the vertical deflection systen.
POWER
STIPPLY (14)
The Iow voltage Power Supply Circuit provides five regulated sources ( -tz
Volts, *5 Volts, +12 Volts, *56 Volts, +I4A Volts ) and three unregulated
source ( +195 volts ) used to operate the vertical deflection
systen, horizontal deflection systen and cRT driving circuit.
CRT CIRCUIT (13)
The CRT Circuit provides the voltage levels and control circuits to operate CRT.
The circuitry consists of the z-axis amplifier, high voltage oscillator,
high voltage regulator, high woltage rectifier and the CRT controls.
The calibrator circuit produces a square wave output signal with accurate
amplitude and frequency.
This output signal available as a square wave Voltage at the PROBE ADJUST0.bVp-p
( II{Ilz ) connector.
-t2-
5. CAI-IBRATI ON
GoldStar Precision Co., Ltd. provides conplete instrunent repair and calibration.
Contact the GoldStar Precsion Co., Ltd. office.
5-1. Calibration interval
To naintain instrunent accuracy, perforn the calibration of the OS-}AZ4P
at least every TAAA hours of operations or every six nonth
if used frequently.
5-2. Test equipment required
The following test equipment(Table 5-1 ; see page 23) and accessories. or
equivalent, are requl.red for the complete calibration of the 0S-9020P.
The given specifications for the test equipnent are the ninimun necessary
for accurate calibration.
Therefore, the specifications of any test equipment used nust neet or
exceed the list specifications.
All the test equipment ia assuned to be comectly calibrated and
operating within the Iisted specification. Operating instructions for the
test equipnent are not given in this procedure. Refer to the inst,ruction
nanual for the test equipnent if nore information is needed.
5-3. Prelininary procedure
This instrunent should be calibrated at an anbient tenperature of +ZAC
( t 5C ) for best overall accuracy.
1. Connect the instrunent to AC Iine voltage, Sa/6aHz line source.
2. Set the instrument controls as given in the preliminary Control
Setting. Allow at least fifteen minutes of warnup before proceeding.
3. See the Adjustment Locations in the pulrout pages(see page 2E).
-13-
5-4. Preliminary control settings
Preset the instrument controls to the settings given below, when starting
the calibration procedures.
Controls Settings Controls Settings
@ Focus Midrange - HORIZOI'ITAL
-
O TRACEROTATIONAs desi.red o H-PosrTrON Midrange
O INTENSITY Midrange (E x1OMAG Normal
O TIME/DIV 1nS
- VERTICAL_
@ VARIABLE CAL
@ V-POSITION Mi drange
@ V_VARIABLE CAL(fully clockwise) - TRIG -
@ LEVEL Midrange, nonal
@ INPUT GND (AC-GND-DC)
COUPLING @ SLOPE + ( putt)
@ VOLTS,/DIV 5 mV,zDIV @ MODE Auto
O V_MODE @ TRIG SOI'RCE INT(CH1)
C CHz INVERT Nornal
5-5. Initial starting procedure
1 . Push the POWER
switch.
2. Wait a few seconds for the cathode ray tube ( CRT ) to warm up.
A trace should appear on the display of the CRT.
If the trace disappears, increase ( clockwise ) the INTENSITYcontrol
setting until the trace is easily observed
4. Adjust F0CUS control for the best focused display.
Readjust POSITI0Ncontrols if necessary, to center the trace.
POWER STIPPLY SYSTEM
NOTE: Before you begin, see ADJUSTMENT
LOCATI0NS the pullout
in pages.
(see page 25)
Control settings
Preset the controls as given in the Prelininary Control Settings.
t1l Check Low-voltage Supply, if necessary.
a. Connect the digital voltneter ( DVM ) from the * 12 volt line.
: *11.75V to +I2.25V ( P B 1 0 1 - 9)
b. Connect the DVM fron the - 12 volt line.
: - 1 1 . 7 5 Vt o - I 2 . 2 5 U ( P8101-6 )
c. Connect the DVM fron the * 5 volt ]ine.
: 1 . 4 .? 5 V t o + 5 . 2 5 V ( PBL0I_T2 )
d. Connect the DVMfrom the *56 volt I ine.
: *54V to +58V ( R183-down)
e. Connect the DVMfron the + t4g volt line.
: *137V to *I42Y ( R183-up )
f. Connect the DVM fron the +195 volt line. (unregulated)
: +185Vto +2lAY (JlA)
lU Check High-voltage Supply.
a. Connnect the DVM to the H. V test point ( H. V and CRT DRVB D )
by High-voltage Probe.
b. Check for DVM reading as -1705 - -1895V (P106-6)
DI SPI-AY
Control Setting
Preset the controls as given in the Prelininary Control Setting.
t3l Check,zAdjustCRTBias.
MODE
switch to the AUTOposition, and TIME,/DIVswitch to the lnS.
a. Rotate the INTENSITY the direction of I o'clock.
to
b. Observe the trace of CRT.
c. Adjust the CRTBias Adjustment VR119 so that the trace makes
an appear.
INTEN
-15-
t4l Check,zAdjust Trace Rotation.
a. check that the trace ia parallel to the horizontal center line.
b. Adjust the TRACER0TATIONfor a trace that is parallel with the
horizontal graticule lines.
tsl Check,zAdjustASTIGnatisn and FOCUS
a. TIME,/DIVswitch to the X-Y position, and AC-GND-DC DC.
to
b. Set the IIITENSITYcontrol for a snall spot, as the following
figure, using position controls.
The spot
center of scneel
c. Check that the spot is round.
d. Adjust the FOcus adjustnent and ASTrGadjustnent vRll? for
a round spot.
-16-
I{ORI ZONTAI- SYSTEM
Control settings
Preset the controls as given in the Prelininary Control Settings.
t6l Check,/Adjust Horizontal Gain.
a. Set the input AC-GND-DC DC.
to
b. TIME,/DIV switch to the Lms.
c. Check that the time narks align with the graticule line over the
center eight DlVisions, within 3%
d. Adjust the H GAIN adjustnent VR114 so that the tine narks align
with the center eight graticule lines.
ust Horizontal
l7l Check,zAdj x 10 MAGGain.
a. Set the TIME,/DIV switch to the 1mS.
b. Set x 10 MAG
c. Check that the one-cycle tine narks align with the ten division
graticule lines, within 5%.
d. Adjust the MAGGAIN adjustnent VR115 so that the one-cycle
time marks align with the ten division graticule Iines.
t8l Check,zAdjust MAGCENT.
a. Set the TIME,/DIV switch to the 0. 1 nS.
b. Being the x1OMAG switch to the x1OMAG,
the Ieft end of the trace is brought to the center point and
then the x1OMAG switch to the xl position.
Observe the novenent of the left end of the trace.
d. Adjust the MAGCENT adjustment VR116 for the movenent of the
end of the trace within t A.ZDIV.
t9l Check,/Adjust low spaced sweep accuracy.
a. Set the tine mark generator for 5mS tine narks.
b. Set the TIME,/DIV swi.tch to 5mS.
c. Check that the tine narks align with the graticule line over the
niddle eigth divisions, within 3%
d. Adjust the SmS,zDIV adjustnent VR106 so that the time narks coincide
with the middle eight graticule lines.
i10l Check,zAdjust High speed sweep accuracy.
a. Set the input coupling switch to DC
b. Set the time nark generator for 10 p S tine narks.
c. Set the TIME,/DIV switch to the 10 r S.
d. Check that the tine marks align with the graticule lines over
the middle eight division.
e. Adjust VC113 that the time narks coincide whth niddle eight
graticule Iines.
-77-
\/ERTTCAI- SYSTEM
Control settings
Preset the controls as given in the Prelininary Control Settings.
tlll Check,zAdjust DC Balance ( Step attenuator balance ).
a. Set the VoLTS,/DIV switch to the bnV position.
b. Position the trace to the horizontal center line.
c. Change the VOLTS,/DIVswitch to the 10mV position.
d. Check that the trace is within 0. 1 division of the horizontal
center line.
e. Adjust the CH1 ( CHz ) DC BAL adjustnent, VR101 ( CH1 ) or VR109
( CHZ ), for a trace at the horizontal center line.
f. Repeat part (a) through (e) until less than A.A5 division shift
is noted when changj.ng the VOLTS,/DIV setting.
ll2l Check,zAdjust ADD BALANCE.
a. Set the TIME,/DIV switch to the lnS position,
the MODEswitch to AUTOposition.
b. Set the CH1 and CHz AC-GND-DCswitches to GND.
c. Set the V-MODEswitch to tDUALl.
d. Next, Adjust the vertical Position control that the trace is
identical with the horizontal center graticule Iine.
e. Set the V-M0DE switch to tADDl.
f. Check that the trace is identical with the horizontal center
graticule Iine within t 0.5 division.
Adjust the ADD BALANCE adjustnent VR118 for two tines of the
difference with the horizontal center graticule line.
t13l Check,/Adjust Vertical Position Center.
a. Confirn the vertical P0SITION control at the nidrange.
b. Check that the trace is within 1 division.
c. Adjust the Position Center adjustnent VR103 ( CHI ), VR112
( CHz ) for a trace at the horizontal center line.
-18-
t 1 4 l Check,/Adjust x1 AC GAIN.
a. Set the TIME,/DIV switch to the 1nS position.
b. Set the V0LTS,/DIV switch to the 10mV position.
c. Set the AC-GND-DC switch to DC.
d. Connect the square-wave generator( using lKHz output range ).
e. Adjust the output anplitude of that generator for 5 division
deflection of screen.
f. Check that the high-voltage level of pulse is fIat.
To be flat
J II LJ-
g. Adjust the x 1 AC GAIN adjustnent VRIA2 ( CH1 ) VR110 ( CHZ )
for a flat level.
t15l Check,/Adjust Vertical Gain.
a. Set the VOLTS,/DIVswitch to the 10nV position and AC-GND-DC
switch to DC.
b. Connect the standard amplitude calibrator to the input.
c. Set the standard amplitude calibrator for a 50nVp-p signal.
d. Check for a di.splay of five divisions.
e. Adjust the GAIN adjustnent VR104 ( CHl ), VR11l ( CHZ ) for a
display of 5 divisions wiLhin 2%.
f. Check aII the VOLTS,/DIVswitch settings.
i16l Check,zAdjust Input Capacity ( ATT : =1 ).
a. Set the VOLTS,/DIVswitch to 10mV position.
b. Set the AC-GND-DC switch to DC.
c. Connect the L-C meter to the input terninals.
d. Check the input capacity for approxinately 30pF.
ll7l Check,zAdjust Vertical Step Response.
a. Set the VOLTS/DIV switch to the 10mVposition.
b. Set the TIME,/DIVswitch to the 20 pS position.
c. Connect the fast-rise, positive output ( 50mV, lMHz ) of the
square-wave generator to the input. Use a 5AQ ternaination
and cable.
d. Set the square-wave generator to lMHz. Adjust the square-wave
generator output for a 5 divisions display.
e. CH1 : Set the YCLLZ for a square wave that is flat.
Then, adjust VC1ll for over-shoot that is +A.?,DIV.
CH2 : Adjust the VCILA for over-shoot that is +A.ZDIV.
-19-
t18l Check/Adjust Attenuation Conpensation ( ATT +10, +LgA ).
a. Set the AC-GND-DC switch to DC
b. Connect the square-Hravegenerator to the CH1 ( CHz ) input
terminals, check for a square-wave that is fLat ( tlat top )
under the following settings.
ATT VOLTS,/DIV The square-wave generator output
+10 9.1 v 4.5 v
+ IAA 1V 5V
c. Adjust the trimmer condenser for a square-wave
( f l a t top ) under the following settings.
ATT VOLTS,/DIV The square-wave Adj ust
generator output cHl rcHz)
+la 0.r v a . 2 5U ucra0( vc108
)
+ Lgg 1V 2.5 V vcr02 ( vc106)
t19l Check,zAdjustInput Capacity.
a, Connect the L-C meter to the input terninal.
b. Check the input capacity for a approxinately 30pF.
c, Adjust the triruner condensers for a 30 pF input capacity under
the following settings.
ATT VOLTS,/DIV Adjust CH1 ( CHZ)
+1 lA mV ( vc109)
+L0 0.t v vc103( vcr07)
+ lDb 1V vc101( vc105
)
-24-
TRIGGERING SYSTEM
ust TRIG CENT.
tZgJ Check,zAdj
a. Set the TRIG SOURCE switch to the CH1, the TRIG SLOPEknob
pull position, the V0LTS,/DIV switch to 10mVand the TIME,zDIV
switch to the 20 pS.
b. Connect the sine-wave generator to the input connector for
a 0 . 3 D I V ( S A K H z.
)
c. Set the TRIG LEVELknob to the nidposition.
d. Adjust the VR105so that synchronizaLton is effected on the
waveforn, 0.3DIV on the screen.
e. Next, set the TRIG SLOPE - ( push : inner state ) and insure
to
that synchronization is effected. Aft,er confirnation, Ieave
the TRIG-SLOPE the depressed state. Readjust when stepped
in
out.
tzt) Check,zAdjust Trigger Balance
a. Set the VOLTS,/DIVswitch to 50mV (CH1 and CHD, the TIME,zDIV
switch to 10uS, the TRIGGER SOURCE switch to INT, the INT TRIG
switch to VERT, the V-M0DE swj.tch to DUAL, and CH1 position
knob to the nid-position.
b. Connect the sine wave generator to the input connectors (CH1 and
CHz) for a five division $1KHz)
c. Adjust CH2 position cntrol so that CH2 waveforn comes to CH1.
d. Next, adjust VR113 so that both waveforns(CH1 and CH2) coincides.
l22l X-Y Operati.on
122-l Check,zAdjust X Gain.
a. Set the V-MODEswitch to CH1, the TIME,TDIVswitch to the
[X-Y], the AC-GND-DC switch of CH1 to DC, the AC-GM-DC switch
of CHZ to GND.
b. Set the VOLTS,/DIVswitch to the 10nV. with X 1 GAIN.
c. Connect the standard anplitude calibrator to the CH1 input
connector.
d. Set the standard amplitude calibrator for a 50mV.
e. Check for a display of 5 divisions.
f. Adjust the X GAIN adjustnent VR108 for a displ.ay of 5 divisions
within 3%.
122-21 Check,/Adjust X Position Center.
a. Set the TIME,/DIV switch to the [X-Y], the V-MODEswitch to CHl.
the horizontal POSITI0N control to the nidposition and
the AC-GND-DC switch to GND.
b. Check to see that round spot is near the center graticule and
i.s within 0.2 division against the horizontal line.
c. Adjust the X CENT adjustnent VR10? to position spot at the
graticule center.
-2r-
122-31 Check,zAdjust X-y phasing.
a. Set the AC-GND-DC switch of CH1and CH2to DC.
b. connect the constant amplitude signal generator
to cHl and cH2
inputs through 50o cable and 50o t.rnination.
c. Adjust the constant anplitude signal generator
for an
8 division horizontal displ ay ot EAKIIi.
I
d' Center the display vertically and horizontally
with the CHl and
CH2 P0SITI0N controts.
e' Check the CRTdisplay for an opening at the horizontal
center
line of 0.4 division or less.
I
l-
CAI-IBRA:rOR
1231 Check,zAdjustpROBE
ADJUST
terninal ( 0.SVp_p, LKHz).
r
I
-
a. connect the pROBE ADJUSTternination to the Digital Frequency counter.
b' /"
check for the PROBE
c'
d'
ADJUST
Next, connect the PROBE
check for the PRoBE
frequency of Lwtz, *itttn zg*tagauz - r\aaHd.
ADJUST
ADJUST
ternination to the Digital Multineter.
output of a.25V, within tgxra.zzs - 0.275v.
F
f-
lb.
I
r-
16
[-
I
F
t-
l.
P
-22-
-
Table 5-1.
TEST EQUIPITTENT
REQUIRED
Description Mininum Specification Exanple of
Usage
1, Constant Anplitude SAKHzreference frequency Check horizontal, vertical
Signal Generator naxinun frequency 56llHz and trigger bandwidth.
variable amplitude
2. Standard Amplitude Anplitude accuracy : 4.25% , Check horizontal and
CaIibrator variable anplitude ; SnV to Vertical gain.
4AY ; frequency : lKHz square
wave
3. Square - wave Variable frequency : ltHz to Check probe and vertical
Generator llilHz ; output anplitude : conpensation.
10nV to 100V (tr=<3nS)
[, Digital Multineter a.I% accuracy Check power supply.
G
5. Digital Frequency w. l% accuracy Check PR0BEADJUSTfrequency.
Counter
i. Tine Mark Generator a,L% accuracy Check horizontal tining.
?. CabLe Impedance : 50O ; type : External trigger operation
RG-58,/U ; length : 42 inches check. Horizontal gain check
connectors : BNC. and adjustnent.
8. Ternination Inpedance : 50 O Vertical Anplifier conpensation
Connectors : BNC. checks and adjustnent.
l. Attenuator Ratio:tAX;connectors Vertical Anpli.fier
BNC;impedance:50O bandwidth check.
M. T - Connector Connectors : BNC. External trigger operation
checks.
6. S E M T C O N D U C T O RL E A D C O N F I G U R A TO N
I
M A R K I N C O R T R A N S I S I O RL E C T R O D ( T O P V I EW)
F E E M A R KN G F O R D I O D E E L E C T R O D E
I
rYPE OF TRANSSIOR
I M
ELECTRODE ARKNG
I T Y P E O F D I O D E E L E C I R O D EM A R K N O
I P O L A RT Y
I
2 S A1 2 0 6 l.EMITIER
RL105
1N 4 0 0 5
MA185
A G 01 A
-rL_t- --kc-
KSC 674
1 2. BASE
1SSr33 -{r-F
2 S C 2 9 0I 3. COLLECTOR E S J A 5 2 -I 2
SOURCE DZ_s.1B
2Sr(304E DZ-6.88
123 2 GATE
\) D R A i N
DZ-7"5B
--il- -K- I
DZ-8,2B
2 S C| 9 0 7 DZ-| 28
I,EMiTTER
DZ.??B
KSC 730
1 2. COLLECTOR
2 S A1 0 2 9 3. BASE
M A R KI N G F O R I C S
1. 8 A S E
2SC3779 rooo)
2.EMITTER TYPE OF IC P A C K A G E O U T LI N E
r e3 3. COLLECTOR ' i- ?
I,^I
tt \t |-
KTC3875 l\rll--P.
2SC3775
G L 7 9 r2 lvl r
COLLECTOR L j . . - ] | | 5
" l M 8 T 3 9 0 6K T A 1 5 0 4
BASE 1. C0MM0N
.4M8T3904 c
2 3 3 EMIITER 2. I NPUT
3. OUTPUT
M A R KI N G F O R T R A N SI S T O R E L E C T R O D E ( F R O N T V I E W )
G L7 8 0 5 f r /3l
I \
| | \t 2
| \ )t
E L E C T R O D E M A R KI N G CL781? t-l
TYPE OF IRANSISIOR
l.INPUT
KTA968A
3 2. C0MM0N
2SD362R
t/' 2
1
S. OUIPUT
KSD288Y 74LS 122N
1. B A S E
74LS7 4AP
2" COLLECIOR
@
74LS 14
J . E MI T T E R 74[S02
74LS | 0
KSAI381 74LS00
a
KSC3503
1 LF356J
MC4558CN
1 EI..lITIER
2 COLLECIOR
3 BASE
ffi
9i
LA
| | leE=le=- ll
7 " E L E C T R I C A LP A R T S A R R A N G E M E N TI T H A D J U S T M E N TL O C A T I O N S
W
@
|
lryrtr ,,,, I f-fi 5 | 3J505.
E!tt']/ *R--
(] =,, Fq,, i ^*,[I{,i ,$
fr */0,- -H-
l'==TIIFd r
-{-lcrr Poo |
a0:"*&F3
+ Dtos
lll+Dtrocr50 cr50
ct15
l\- J
:
+ Drlr -Al
9|\-V
/)\
s,.
: , , *iR'(rri :i{i.j 1 " | 1
'Uv' \y
0= li
::\lo''c$5:.
(9
)i 'u'i
ri( i;3i i i i ilI , rtor
t. u,o! <:- irrT
CJ. a ll;m
vA
:
t/-\
\!--l
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. I ll,ro
\ l-
it . ,f_l \.. ,,,,.
t,3
(.
I :l ].J,,,,e]{
-v
irri i.--rl iiIil I in11it/-----,i-- I v Dtz!
{ 1 8}
'\,,J1.i iil |':vv: :0|];
gtt-[
imiol
:
,.1
D'tt
Dtt' -
- A3
Y-l= 11
vcrri
(
-+
5
+
-:uae
Dr2?
'-ffi- ( i +
r'\
{1-r\
r
0r$
,'Y Y; il
-.;,J--ll..oxH: *E"$$:';13
/c(
8"" t il;
-sr |;Y--'l..,,".:[
--I
Ycll2
_D'l?l
--ur ll (i'