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Tektronix 551 Dual Beam Instruction Manual

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I I N I STRUCTI O I N I
MANUAL
Tektronix, Inc.
S.W. M illikan W ay
•
Tektronix International A.G.
Terrassenweg 1A
•
070-245
P. O. Box 500
•
Beaverton, Oregon
Zug, Switzerland
•
PH. 042-49192
O S C I L L O S C O P E
•
Phone Ml 4-0161
•
®
Cable.- Tekintag, Zug Switzerland
Cables: Tektronix
•
Telex 53.574

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Summary of Contents for Tektronix 551 Dual Beam

  • Page 1 Tektronix, Inc. S.W. M illikan W ay • P. O. Box 500 • Beaverton, Oregon • Phone Ml 4-0161 • Cables: Tektronix Tektronix International A.G. Terrassenweg 1A • Zug, Switzerland • PH. 042-49192 ® Cable.- Tekintag, Zug Switzerland • Telex 53.574...
  • Page 2 WARRANTY A ll Tektronix instruments are w a rra n ted aga in st defective m aterials and w o rkm a n ­ ship fo r one year. Tektronix transform ers, m anufactured in our own p la n t, are w a r­...
  • Page 3 Operating Instructions Section 3 Circuit Description Section 4 M a in te n a n c e Section 5 Calibration Section 6 Accessories Section nd Schematics Parts List a Section 8 , - M';'...
  • Page 5 Type N ideally compensated Type K Unit driven with a Tektronix Type 107 Square-Wave Generator. The Type P permits the The Type N Sampling Unit is designed for use with Tek­...
  • Page 6 Extends the fastest sweep rate to .02/xsec/cm. Accurate within 5%. Type S Unblanking. The Type S Plug-In Unit is designed for use with Tektronix Wide-Band convertible oscilloscopes, with its primary ap­ DC coupled. plication being as a diode tester. The crt switching display depicts voltage across a test diode as a function of time.
  • Page 7 Specifications— Type 551 Power Requirements External Horizontal Signal Input Deflection factor—continuously variable from 0.2v/cm to Line voltage— 105 v to 125 v, or 210 v to 250 v, 50-60 cycles. 20 v/cm. Power— 850 watts at 117 v line voltage using two Type CA Frequency response—...
  • Page 8 G E T T I N G A C Q U A I N T E D Type A (both units): To help you get acquainted with your Type 551, we have outlined in this section some of the more frequently en­ INPUT A, AC INPUT SELECTOR countered oscilloscope applications.
  • Page 9 Getting Acquainted— Type 551 waveform from the SQUARE-WAVE CALIBRATOR has both With the VERTICAL POSITION controls of both the UPPER BEAM and LOWER BEAM plug-ins, position both displays at an ac (square wave) component and a dc component. When the center of the graticule. You will notice that the square the INPUT SELECTOR switch is in the AC position, the effect wave appears to consist of a single display when this is done.
  • Page 10 Getting Acquainted— Type 551 Now reset the HORIZONTAL DISPLAY switch to the The AC Triggering Mode NORMAL position. Check that the TRIGGER SLOPE switch is set at -(-UPPER, that the TRIGGERING LEVEL control is turned full right or Effect of the Trigger Slope Switch full left, and that the STABILITY control is at PRESET.
  • Page 11 Getting Acquainted— Type 551 3. In the AC and AC IF REJECT modes the TRIGGERING STABILITY LEVEL control provides control of the height or "level" at TRIGGERING LEVEL which the trace starts on the waveform being observed. The TRIGGERING LEVEL control is inoperative in the AUTO, mode.
  • Page 12 Getting Acquainted— Type 551 ter of the graticule (for the beam on which triggering is oc­ curring. If you move the TRIGGERING LEVEL control towards + , the starting point will be raised, while if you move the TRIGGERING LEVEL control towards —, the starting point will be lowered.
  • Page 13 O P E R A T I N G I N S T R U C T I O N S HORIZONTAL-DEFLECTION SYSTEM If you want the start of the display, at the left-hand end TRIGGERED OPERATION of the graticule, to occur at a time when the triggering signal is rising (has a positive slope), use the -(-LINE, the +UPPER, For many uses of your oscilloscope you will need to get a the + LOWER, or the +EXT.
  • Page 14 Operating Instructions— Type 551 TRIGGERING MODE TRIGGER SLOPE IF REJECT LOWER Fig. 3 -1 . T rig g e rin g th e p o s itiv e -g o in g p o rtio n in p u t w a ve fo rm .
  • Page 15 Operating Instructions— Type 551 TRIGGERING MODE TRIGGER SLOPE IP REJECT When black TRIGGER SLOPE knob is placed the — UPPER or — LOWER position, display will start during the voltage faff of the waveform; that is, during that part waveform when the slope is negative ( —...
  • Page 16 Operating Instructions— Type 551 available in the PRESET position. You can do this if you are 3. Turn the TRIGGERING LEVEL control slowly toward the center of its range until the trace begins at the desired point using triggered operation in either the AC, AC LF REJECT, on the waveform being observed.
  • Page 17 Operating Instructions— Type 551 (See “ Output Waveforms” on next page.) The signals from External Horizontal Input these connectors have a starting time and a duration cor­ responding to the starting time and duration of the horizon­ You might need to effect horizontal deflection of the spot tal sweep of the crt spot.
  • Page 18 Type 551 Oscilloscope. The probe is easily identified by its brown, molded-plastic nose. Connected to the input circuit of a Tektronix plug-in, the probe presents an input resistance The plug-in VOLTS/CM switch controls the vertical-deflec­ of 10 megohms and has an attenuation ratio of 10:1. For tion factor (vertical sensitivity) in accurately calibrated steps.
  • Page 19 Operating Instructions— Type 551 Fig. 3 -3 . Displaying the Calibrator waveform provides a convenient means for com­ pensating the probe input capacitance. Adjust the probe capacitor for a flat top on the calibrator AC-DC square wave, as shown in the right-hand picture of Fig. 3-3. VOLTS/CM VARIABLE CALIBRATED...
  • Page 20 The primary function of the Calibrator is to Where the volume of photographic work warrants it you may provide a convenient method for verifying the calibration want to obtain a clear graticule from your Tektronix Field of the vertical-deflection system and for adjusting the probes. Engineer.
  • Page 21 Operating Instructions— Type 551 In order to realize the desired amount of deflection sensi­ TRIGGERING Black TRIGGERING LEVEL control deter- tivity in the Type T57 Cathode-Ray Tube, the deflection plates LEVEL mines at what voltage on the triggering have been placed as close as possible to the path of the waveform the horizontal trace will start.
  • Page 22 Operating Instructions— Type 551 A two position switch to select either single SINGLE SWEEP SAWTOOTH Connector supplying a positive-going saw­ sweep or normal operation of the sweep tooth having a peak value of about +150 circuits. volts. The rising part of the sawtooth coincides with the oscilloscope horizontal RESET The RESET button prepares the sweep cir­...
  • Page 23 The vertical-deflection system is shown in the upper half until the time-base generator reverts it to its quiescent state. of the Block Diagram. The blocks labeled “ Plug-Ins" repre­ sents Tektronix plug-in preamplifiers. Power and signal con­ nections to the plug-ins are made through multiple-contact Miller Runup Circuit interconnecting sockets.
  • Page 24 The pulses generated by the Sweep-Gating Multivibrator are amplified by the Sync. Amplifier for connection through the plug-in connector to the switching circuits in a Tektronix Output Stage dual-trace plug-in .This circuit is only in operation when the plug-in dual-trace feature is used.
  • Page 25 Circuit Description— Type 551 Delay Line Beam-Position Indicators The output signal from the Vertical Amplifier is coupled The beam-position indicators B1083 and B1227, located on through the balanced Delay Line to the vertical-deflection the front panel above the crt, indicate the relative vertical plates of the crt.
  • Page 26 Circuit Description— Type 551 is dc-coupled to the Trigger Input stage, which in turn is de­ V45A is conducting and its plate is down. This holds the coupled to the Schmitt Trigger. grid of V45B below cutoff, since the two circuits are de­ coupled.
  • Page 27 Circuit Description— Type 551 gain of the Miller tube, as a Class A amplifier, is so high TIME-BASE GENERATOR that the voltage coupled back through Cl 60 keeps the grid constant within a fraction of a volt. The Time-Base Trigger produces a square-wave which is coupled to the Time-Base Generator.
  • Page 28 Circuit Description— Type 551 be much larger than during the sweep portion, and the plate switched in. This control, an internal screwdriver adjustment of the Miller Tube will return rapidly to its quiescent voltage. labeled Preset Stability, provides a fixed dc voltage for the This produces the retrace portion of the sweep sawtooth grid of V135A.
  • Page 29 Circuit Description— Type 551 unblanks the crt during the trace portion of the sweep and Driver CF permits the trace to be observed. Placing the HORIZONTAL DISPLAY switch in the EXT. position adds R145 to the Sweep- In the NORMAL position of the HORIZONTAL DISPLAY Gating Multivibrator cathode circuit making the circuits in­...
  • Page 30 Circuit Description— Type 551 The additional current required for faster sweep rotes is ripple voltage at the plate of V604 is such as to cancel most obtained by applying a positive flat-topped pulse to the grid of the ripple on the — 150-volt bus. of the pentode V394 during the period of the sweep.
  • Page 31 Circuit Description— Type 551 volt supply. The regulator action of this circuit is the same a voltage near —150 volts obtained from a tap on the di­ as that described for the + 100-volt supply. vider connected between the decoupled + 100-volt bus and the -1350-volt bus.
  • Page 32 NOTES Type 551...
  • Page 33 M A I N T E N A N C E hours of operation (or every six months if used intermittently). PREVENTIVE MAINTENANCE A complete step-by-step procedure for recalibrating the in­ strument is presented in the Recalibration Procedure section of this manual. Air Filter The Type 551 Oscilloscope is cooled by air drawn into the REPLACING COMPONENTS...
  • Page 34 Tektronix in one-pound rolls. panels outward from the carrying handles. To remove the Order by Tektronix part number 251-514.
  • Page 35 Replacement for all parts used in the Type 551 Oscilloscope diagram contained in the diagram section of the manual. can be purchased directly from Tektronix at current net prices. Each of these basic circuits performs a specific part of the However, since most of the components are standard elec­...
  • Page 36 Maintenance— Type 551 which provides an overall picture of instrument operation. supplies first. If the output and ripple voltages of the regu­ The reference designation of each electronic component of lated power supplies are correct, use the trouble symptoms the instrument is shown on the circuit diagrams as well as and the following Circuit Isolation information to locate the important voltages and waveforms.
  • Page 37 Maintenance— Type 551 erator or a misadjustment of the Sweep Length control. Con­ tal-deflection plates and turn the HORIZONTAL DISPLAY switch to the EXT. position. If the spot now reappears, the sult the Recalibration Procedure for information on adjusting Horizontal Amplifier is in balance, and the trouble is being this control.
  • Page 38 Maintenance— Type 551 improperly adjusted probe. Refer to “ Use of Probes", page 3-8. High-frequency distortion is produced in the Vertical Am­ plifiers or Delay Lines. Generally, this will appear at the front corner of a step function. Insufficient high-frequency peaking, which limits the rise­ time and consequently the bandwidth, will produce the rounded-corner type of distortion illustrated in Fig.
  • Page 39 Part first added at this serial number. 000X Part removed after this serial number. * 000-000 Asterisk preceding Tektronix Part Number indicates manufactured by or for Tek­ tronix, also reworked or checked components. (Mod. w /} Simple replacement not recommended.
  • Page 40 HOW TO ORDER PARTS Replacement parts are available through your local Tek­ tronix Field Office. Improvements in Tektronix instruments are incorporated as soon as available. Therefore, when ordering a replacement part it is important to supply the part number including any suffix, instrument type, serial number, plus a modification number where applicable.

  • Page 41: Parts List

    PARTS LIST Bulbs Tektronix Part Number 150-002 B129 Neon, Type NE-2 150-002 Neon, Type NE-2 B163 150-002 Neon, Type NE-2 B167 150-002 Neon, Type NE-2 B170 150-002 Neon, Type NE-2 B347 150-002 Neon, Type NE-2 B386 150-002 Neon, Type NE-2...
  • Page 42 Capacitors (c o n t i n u e d } Tektronix Part Number 283-534 C160D 82 pf Cer. 500 v 281-010 4.5-25 pf Cer. Var. 500 v C160E 291-008 Mylar .001 fif C160F .01 /tf C160G *291-007 Mylar Timing Series...
  • Page 43 Capacitors Tektronix (c o n t i n u e d j Part Number 290-081 C700 2x100 /xf 290-081 C701 2x100 ix f 350 v 283-006 C702 X2358-up .02 /if Cer. 600 v 285-510 C721 101-2357 400 v .01 /if...
  • Page 44 Capacitors (c o n t i n u e d Tektronix Part Number Mica 500 v 283-518 C875 330 pf 281-513 C884 27 pf Cer. 500 v 283-000 C897 .001 /if Cer. 500 v 290-036 Cl 003 2 x 20 /if...
  • Page 45 Capacitors (c o n t i n u e d I T e k tr o n ix P a rt N u m b e r 283-000 Cer. 500 v .001 (if Cl 223 283-001 Cer. 500 v .005 (if Cl 228 281-027 500 v...
  • Page 46 Capacitors ( c o n t i n u e d ) T e k tro n ix P a rt N u m b e r 500 v 283-001 C2208 Cer. .005 /xf C2212 Cer. 500 v 283-000 .001 lit 500 v 283-000 C2223...
  • Page 47 Inductors ( c o n t i n u e d ) T e k tro n ix P a rt N u m b e r *114-114 core 276-506 LI 302 X678-up 1.2-2.4 /xh Var. *114-114 LI 303 X678-up 1.2-2.4 /xh Var.
  • Page 48 Resistors ( c o n t i n u e d ) Tektronix Part Number 302-474 470 k y2 w 311-099 R17t 100 k Var. TRIG. LEVEL 22 k y2 w 302-223 y2 w 302-474 470 k 302-474 101-2158 470 k...
  • Page 49 Resistors (c o n t i n u e d } Tektronix Part Number 302-101 R127 100 a y2 w R128 302-123 y2 w R129 302-103 V2 W R130 22 k 306-223 302-102 R131 R132 47 a 302-470 R133 101-2158X 3.3 k 1...
  • Page 50 Resistors ( c o n t i n u e d l Tektronix Part Number 311-008 Sweep Length Var. R176 308-051 R178 302-474 470 k R180A 302-475 R180B 4.7 meg 302-475 4.7 meg R181 302-101 R183 304-104 100 k R191...
  • Page 51 Resistors ( c o n t i n u e d ) Tektronix Part Number R381 ioo a 302-101 R383 47 a 302-470 R384 6-30 k 310-507 Prec. R386 ioo a 302-101 R387 39 k 306-393 R388 39 k 306-393...
  • Page 52 Resistors (c o n t i n u e d j Part Number Tektronix 310-056 333 k Prec. R658 308-052 R659 XI 66-up 304-823 R664 82 k 304-100 R665 i o n 304-100 R666 X2358-up i o n 400 a...
  • Page 53 Resistors ( c o n t i n u e d ) T e k tro n ix P a rt N u m b e r 308-065 R728 2358-up 25 w 308-041 R729 101-2357 2.4 k 25 w R729 308-065 2358-up 25 w...
  • Page 54 Resistors (c o n t i n u e d I T e k tro n ix P a rt N u m b e r 302-333 R854 X3090-up 33 k 302-225 R855 2.2 meg 302-225 R856 2.2 meg 302-225 R857 101-665 2.2 meg...
  • Page 55 Resistors ( c o n t i n u e d ) T e k t r o n i x P a rt N u m b e r 302-331 R1018 3 3 0 a 302-474 470 k R1019 302-270 27 a R1021...
  • Page 56 Resistors ( c o n t i n u e d j T e k tro n ix P a rt N u m b e r R1165 4.5 k 308-066 R1172 470 k 302-474 Vi w R1182 470 k 302-474 R1185 4.5 k...
  • Page 57 Resistors ( c o n t i n u e d ! T e k tro n ix P a rt N u m b e r R2052 470 k 302-474 'A w R2054 167 o 308-104 R2055 4.5 k 308-066 R2062 47 Ok...
  • Page 58 Rectifiers Tektronix Part Number *106-045 SR640 101-2357X 5-250 ma plates per leg SR660 *106-013 101-2357X 5-500 ma plates per leg SR690 101-2357X 4-500 ma plates per leg *106-046 SR700 *106-048 101-2357X 5-500 ma plates per leg SR740 101-2357X 5-100 ma plates per leg...
  • Page 59 Electron Tubes and Semiconductors ( c o n t i n u e d ) T e k tro n ix P a rt N u m b e r 154-028 V I33 101-2158 6BQ7A 154-187 2159-up 6DJ8 154-028 V I35 101-2158 6BQ7A 154-187...
  • Page 60 Electron Tubes and Semiconductors (continued) T e k tro n ix P a rt N u m b e r 154-028 101-596 6BQ7A V I033 154-187 597-up 6DJ8 154-028 6BQ7A V I043 101-596 154-187 6DJ8 597-up 154-367 8136/6DK6 V I054 154-367 8136/6DK6 V I064...
  • Page 61 Type 551 M echanical Parts List Tektronix Part Number ADAPTER BINDING POST 013-004 ADAPTER POWER CORD 3 WIRE TO 2 WIRE 103-013 ANGLE FRAME TOP LEFT 122-019 ANGLE FRAME 20%6 BOTTOM (101-2294) 122-039 ANGLE FRAME 14% BOTTOM (101-2294) 122-042 ANGLE FRAME 14% TOP...
  • Page 62 Mechanical Parts List (c o n t i n u e d ) Tektronix Part Number BRACKET CAL SUPPORT (101-2158) 406-291 BRACKET CAL. SUPPORT (2159-up) 406-543 BUSHING HEX 3 / 8-3 2 x 1 3 /32 3 58-029 BUSHING NYLON FOR 5-WAY BINDING POST 358-036 CABLE HARNESS V.A.
  • Page 63 Mechanical Parts List (continued) Tektronix Part Number CLAMP CABLE 3 /,6 PLASTIC 343-002 CLAMP CABLE y2 PLASTIC 343-006 CLAMP CABLE % PLASTIC 343-013 CLAMP STN. STL (101-1819) 343-034 CLAMP #20 WIRE 343-043 CONNECTOR CHASSIS MNT. 16 CONT. FEMALE (INDICATOR) 131-018 CONNECTOR CHASSIS MNT.
  • Page 64 Mechanical Parts List ( c o n t i n u e d ) T e k tro n ix P a rt N u m b e r 352-010 HOLDER FUSE 352-015 HOLDER NYLON FOR COIL FORM 3 /,6 X 3/4 352-016 9 /u W /O PIN...
  • Page 65 Mechanical Parts List (continuedj Tektronix Part Number MOUNT FAN MOTOR 5'/2" 426-046 MOUNT FAN MOTOR 7 " 426-047 NUT CAP HEX 8-32 x 5 / u 210-402 NUT HEX 4-40 x 3 / u 210-406 NUT HEX 8-32 x V4...
  • Page 66 Mechanical Parts List (continued) Tektronix Part Number 386-658 PLATE SUB-PANEL REAR (INDICATOR) 386-662 PLATE CAB. BOTTOM (POWER SUPPLY) (101-2294) 386-712 PLATE SUB-PANEL FRONT (POWER SUPPLY) 386-716 PLATE CAB. SIDE LEFT & RIGHT (101-272) 286-736 PLATE CAB. SIDE LEFT (INDICATOR) (273-2294)
  • Page 67 Mechanical Parts List (continued) Tektronix Part Number 354-178 RING SECURING (1820-4199) 354-178 RING SECURING (4200-up) 354-079 RING CLAMPING (1820-up 354-103 RING CLAMPING (354-079 & 210-502) 384-135 ROD SPACING y4 x3% TAPPED 6-32 BOTH ENDS 384-162 ROD EXTENSION x 87 / , 6...
  • Page 68 Mechanical Parts List (c o n t i n u e d } T e k tro n ix P a rt N u m b e r 211-543 211-543 SCREW 6-32 x s / u RHS 211-553 SCREW 6-32 x i y 2 RHS, PHILLIPS 211-559 SCREW 6-32 x % FHS, 100°, PHILLIPS 211-560...
  • Page 69 Mechanical Parts List (continued) Tektronix Part Number SOCKET STM7G 136-008 SOCKET STM8G 136-011 SOCKET STM9G 136-015 SOCKET STM14 136-019 SOCKET LIGHT JEWEL 136-025 SOCKET TIP JACK BLACK NYLON 136-037 SOCKET 7 PIN TUBE 136-044 SPACER INSULATING % x % (101-1219)
  • Page 70 U P P E R BEAM CHANNEL SIGNAL INPUT OUTPUT PLUG-INS DRIVER INPUT AMPLIFIER AMPLIFIER V I O I 4 V I 0 - 2 4 V 1 0 3 3 V 1 0 4 3 V U O - V I Z 1 4 TRIGGER- TRIGG ER- PI CKOFF...

  • Page 71: Block Diagram

    DELAY LINE 9 - 2 2 - 6 2 BLOCK DIAGRAM...
  • Page 72 S—wv--- vw —•—v w - L. I Q > @> A ccessories Supplied with Probe M ini-gator Clip 344-046 Banana Plug 134-013 Probe Holder 352-024 Hook Tip 206-105 '206-015 BNC Tip 206-060 Spring Tip P incer Tip 013-027 175-124 5 inch Ground Strap 175-125 12 inch Ground Strap A ccessories That May be Purchased...
  • Page 73 010-020 010-030 010-035 010-041 010-027 010-031 010-045 010-046 Ckt. Cable Tektronix Length Value Description P a rt No. 42 inches only .5 jih Fixed 108-211 All Lengths 9 meg 1/2 w Fixed P rec. 309-232 6ft., 9ft., 12 ft Selected...
  • Page 74 TRIGGER INPUT AMPLIFIER A A j T Y P E 5 5 1 O S C I L L O S C O P E...
  • Page 75 T AMPLIFIER SCHMITT TRIGGER I I N G M O D A SE G E N . DIAG.) TO G R I D , P I N 2, 1 H 3 5 A M U L T I V I B R A T O R (TIME-B ASE GEN.
  • Page 76 U N B L A N K I N G P U L S E OSCILLOSCOPE TYPE...
  • Page 77 U N B L A N K I N G P U LS E TI ME-BASE GENERATOR A B ,...
  • Page 78 SWI60 1 --------- [ T IM £ /C M ~ | IF^R 5 F $ R -3F$R T Y P E 55 1 OSCILLOSCOPE...
  • Page 79 W IT H T IM E /C M S E E P A R T S L IS T FO R E A R L IE R V A L U E S A N D S /N C H A N G E S O F P A R T S M A R K E D W I T H R E D T I N T B L O C K S 9 •...
  • Page 80 + 2 2 5 V TYPE 551 OSCILLOSCOPE A B ,...
  • Page 81 S E E P A R T S L i S T FO R E A R L IE R V A L U E S A N D S /N CHANGES OF 9 - 2 7 * 6 2 PARTS M A R K E D W iT H RED T JN T B LO C K S H O R IZO N TA L...
  • Page 82 V I0 8 4 A V I2 2 S B INDICATOR AMPLIFIERS T O S W 1 0 A 4 B IN T . TR IG . A (TIM E -B A S E TRIO. DUG.) ' w LOCATED OH EXT.
  • Page 83 NOTfc? 8136 MAY f t ! SUBSTITUTED FOB6D1C6. VOLTAGE READINGS w ere obtained WITH CONTROIS S E T AS FOLLOWS. INPUT SIGNAL ...............NONE TUGGER MOOE...............AUTO. EOSITKJN ..............TRACE CENTIRH> IMPORTANT see a ls o no te o n time-base trig g e r diagram u fe p i ' l l { A T .
  • Page 84 THIS NE TW O R K . M AY N C T BE CONNECTED IN SOME INSTRUMENTS DUE TO V AR IATIO NS IN DELAY L IN E S . AA c T Y P E OSCILLOSCOPE...
  • Page 85 -'im p------onnp----- 'TfflP- C1303- C/307. CI309 .7 -3 7 " . 7 - 3 7 ' . 7 - 3 \ R1302 * t K i t /tf -\SulSLr- vJuul/ ' • — 'Jlfi-fly “I i------ “ i TO L O W E R ^ DEFLECTION PLATE TO UPPER...
  • Page 86 DECOUPLED...
  • Page 87 TO SW 10 A d B - I NT. TRl$. B (T IM E -B A S E TRIG. OIAG.) S E E PA RTS L IS T FOR E A R L IE R VALU ES AND S /N CHANGES OF P A R T S M A R K E D W IT H R E D T I N T 6 L 0 C K S e »...
  • Page 88 FRO M V E R T IC A L A M P L IF IE R LO W ER BEAM • “ i CO N T . TYPE O S C ILL O SC O PE...
  • Page 89 TO LO W ER D E FLE C TIO N PLATE LOWER TO UPPER DEFLECTION PLATE S E E P A R T S U IS T F O R E A R L IE R V A L U E S A N D S/ H CHANGES OF P AR TS M A R K E D W IT H R E D T IN T B LO C K S 0 - 7 - f c f c...
  • Page 90 M U L T I V I B R A T O R CONCBN1 SQ UARB-W A T Y P E 5 5 1 O S C I L L O S C O P E A A Z...
  • Page 91 CAL. C.F. ---------------------------- ------------------------------------------r ________________ 1 CONCENTRIC W ITH 2 > -2 / 7 - 6 2 SQUARE-WAVE C A LIB R A TO R ■ S E E PAR TS L IS T F O R E A R L IE R V A L U E S AND S /N CHANGES OF PARTS M A R K E D W IT H R E D CALIBRATOR...
  • Page 93 AT PINg, V7I7 + 350V V687 V657 V637 V6I6 AT PIN7, V 657 P O W E R S U P P L Y V I5 4 VIS3 VI93 VI6I + 2 2 5 V ' IOOK V384 V364 6 / , v FROM FROM TE R M .
  • Page 94 • P&42 LV * w l i *V * # C ’r...
  • Page 95 T 7 5 0 f ~ ° 6.3 V * ELEV. TO + 2 2 5 V o--------------» ■ (—0----------- * k> 6.3V ELEV, + 2 2 5 V '— o--------------» VERTICAL. AM PLIFIERS -o— 1 3 3 ° ELEV. + IOOV 6.3V* T K 7 5 0...
  • Page 96 UNBLAN FROM CAT)- T Y P E O S C I L L O S C O P E...
  • Page 97 + 2 2 S V C R T C I R C U I T A D .
  • Page 98 MANUAL CHANGE INFORMATION At Tektronix, we continually strive to keep up with latest electronic developments by adding circuit and component improvements to our instruments as soon as they are developed and tested. Sometimes, due to printing and shipping require­ ments, we can't get these changes immediately into printed manuals.
  • Page 99 TYPE 551 Direct Replacement HANDLE, ASSEMBLY, INDICATOR should read 381-204 HANDLE, ASSEMBLY, PWR SUPPLY should read 381-207...
  • Page 100 TYPK 551 Fig. 2. Shows fan connection for Fig. I. Transform er 234V operation. connections. To convert the Type 551 indication and power supply units for operation an 234 V nominal line voltage: 1. Remove the straps between terminals 1 and 2, 3 and 4 on all three of the transform ers (2 in Power Supply and 1 in Indicator).
  • Page 101 Apply a fast rise square wave to Upper and Lower Beam vertical INPUT connectors. This type of waveform may be obtained from a Tektronix Type 107 or 105 Square Wave Generator. When using the Square Wave Generator set the output frequency at approximately 500 kc.
  • Page 102 TYPE 551 MOD 6402 - Tent S/N 5080 (53) 2 x 250k R823 311-356 Change to 3.9m 306-395 R826 Change to R828 680k l/2w 302-684 306-156 R829 R830 306-156 Change to 3.9m 306-395 R831 R851 Change to 4.7m 306-475 R852 Change to 4.7m 306-475 R853...
  • Page 103 TYPE 551 MOD 6402 - Tent S/N 5080 On instruments with S/N above 5080, some circuit changes were made in the CRT system. These changes consist of the addition of a HORI­ ZONTAL SENSITIVITY BALANCE control and the necessary circuitry to provide -individual control of the cathode voltages to compensate for slight differences in the horizontal deflection sensitivity of the two halves of the CRT.
  • Page 104 P A R T I A L D IAG R A M - S S I C R T C I R C U I T M O D £ > 4 -0 2...
  • Page 105 M O D € > + 0 2 . /J 2 . - /< 3 - € > £ .
  • Page 106 K4XL's KAMA This manual is provided FREE OF CHARGE from the “BoatAnchor Manual Archive” as a service to the Boatanchor community. It was uploaded by someone who wanted to help you repair and maintain your equipment. If you paid anyone other than BAMA for this manual, you paid someone who is making a profit from the free labor of others without asking their permission.