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OSCILLOSCOPE 

MANUAL 

MODEL  54-45 

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Summary of Contents for 54-45

Page 1: ...OSCILLOSCOPE MANUAL MODEL 54 45 c IIITlt U ...

Page 2: ...minals 24 1 4 Notes on Controls and Terminals 25 SECTION II OPERATION 25 SECTION III APPLICATIONS 27 SECTION IV MAINTENANCE 30 4 1 General 30 4 2 Removal from Cabinet 30 4 3 Trimmer Capacitor C1 Adjustment 30 4 4 Troubleshooting 32 SECTION V SERVICE POLICY 35 SCHEMATIC DIAGRAM 36 PARTS LIST 37 RCA INSTITUTES INc A SERVI CE OF RADIO CORPORATION OF AMERICA HOME STUDY SCHOOL New York N Y 0 E E l CO 1...

Page 3: ...he reference designation letters XV and a resistor the letter R Thus if you have ten sockets and 20 resistors in your kit these parts would be identified by the designations XVl through XVlO and Rl through R20 respectively JACKS The reference designation assigned to receptacles often referred to as jacks or binding posts is the letter J The different types of jacks used in this kit are so lettered...

Page 4: ...ch items are usually screws nuts and washers Machine screws are sized in accordance with the diameters of the threaded portion No 2 No 4 No 6 with the smaller number denoting the smaller dia meter The second number indicates the number of threads to an inch Thus a No 6 32 screw has a No 6 diameter with 32 threads per inch The final number indicates the length of the threaded portion A No 6 32 x 3 ...

Page 5: ... or are missing a component please write us at Dept O RCA Institutes Inc 350 West 4th St New York N Y 10014 If there is a slight hardware shortage you can expedite matters by purchasing these pieces at your local jobber or hardware store USE THE BEST GRADE OF ROSIN CORE RADIO SOLDER ONLY UNDER NO CIRCUMSTANCES SHOULD ACID CORE SOLDER OR ACID FLUX BE USED The use of acid core solder or acid paste f...

Page 6: ...f each component on the chassis near the part with a c uayon This will facilitate your wiring operation WHEN WIRING lay the component in close to the chassis and dress it as shown in the drawing BE CAREFUL to avoid shorts at the lugs The book is written so that the wiring closest to the chassis usually gets wired in first The next layer of wires are to be soldered in next In each case dress the le...

Page 7: ...D TERMINAL STRIP TB7 as shown 8 Mount the 3 POST 2 LEFT TERMINAL STRIP TB8 as shown SECURE it with one No 6 32 x 1 411 flathead screw one No 6 lockwasher and one No 6 32 hex nut 9 Mount the 1 POST RIGHT WITH GROUND TERMINAL STRIP TB9 as shown SECURE it with one No 6 32 x 1 4 flathead screw one No 6 lockwasher and one No 6 32 hex nut 10 Mount the 4 POST 2 RIGHT WITH GROUND TERMINAL STRIP TBl l as s...

Page 8: ...r section over the LINE CORD and position it into the channels of the larger section Compress the two sections together with a pair of pliers gripping the larger diameter end of the STRAIN RELIEF Pass the tinned ends of the LINE CORD through the hole on the rear of the chassis as shown 8 Insert the large 1 RUBBER GROMMET in the rectangular cutout on the rear of the chassis as shown 9 The remaining...

Page 9: ...ver the left lug on the POTENTIOMETER SECURE it with one 3 8 flatwasher and one 3 8 hex nut 10 MOUNT the 60120 ROTARY SWITCH WITH POT S3 R36 in the hole marked SWEEP RANGE VERN on the front panel Rotate the switch so that the locating tab slips into the ob long hole on the chassis SECURE it with one 3 8 flatwasher and one 3 8 hex nut 11 MOUNT the NEON BULB 11 to the panel SECURE it by using one re...

Page 10: ...hassis as shown It will be connected later 4 Connect a 4 piece of RED WIRE from TB4 2 _ C to TB6 5 C J 5 Connect a 3 1 2 piece of ORANGE WIRE from TB3 4 C to TB5 1 C 76 J Connect a 3 1 2 piece of BLUE WIRE from TB3 3 C to TB5 3 C Connect a 6 piece of GRAY WIRE to TB6 2 C OUTE the other end toward the front of the chassis as shown It will be connected later Vs Connect a 4 piece of ORANGE WIRE from ...

Page 11: ... of BARE WIRE from XV2 3 C to XV2 8 C V7 Connect a 5 1 2 piece of BROWN WIRE from XV2 g C through XV2 4 S1 to XV5 5C l 8 Connect a 3 1 2 piece of BROWN WIRE from XV2 5 S3 to XV4 12 C l g Connect a 2 piece of VIOLET WIRE from XV2 7 1 to TB4 l C l O Connect a 4 piece of YELLOW WIRE from XV2 9 C to XV4 1 S2 v 1 Connect a 3 4 piece of BARE WIRE from XV4 3 S1 to XV4 6 C li2 Connect a 1 2 piece of BARE ...

Page 12: ...of THICK GRAY WIRE to XV2 8 S2 ROUTE the other end along the chassis as shown It will be connected later 3 Connect a 9 piece of THICK ORANGE WIRE to XV2 6 C ROUTE the other end through HOLE E to the top of the chassis It will be connected later C 4 Connect a 12 piece of BLACK WIRE to XV6 2 C ROUTE the other end along the chassis as shown It will be connected later t L 5 Connect a 3 4 piece of BARE...

Page 13: ...de to R8 3 S1 and the positive side to TB2 2 C r_ 7 Cut oth leads on a 1 ufd 600V MYLAR CAPACITOR C3 to 1 1 4 CONNECT from l S1 2 S1 to TB2 1 C v 8 Cut both leads on a 990Kr 1 2W 5 RESISTOR R1 to 1 2 CONNECT from S1 1 C to S1 3 C V9 Cut both leads on the 1 5 6 uu 7RIMMER CAPACITOR C1 to 3 4 CONNECT the side with the adjusting screw to S1 1 S4 and the other side to S1 3 S3 0 t 10 Cut both leads on ...

Page 14: ...green silver RESISTOR R3 to 1 2 CONNECT from TB2 1 C to TB2 2 C 4 Cut both leads on a 003 ufd DISC CAPACITOR C5 to 1 2 CONNECT from XV1 7 C to TB2 3 C l 5 Cut both leads on a 5600 1 2W 10 green blue brown silver RESISTOR R10 to 1 2 CONNECT from XV1 7 S_2 to TB2 3 S _ v 6 Cut both leads on a 6800 1 2W 10 blue gray brown silver RESISTOR R5 to 1 2 CONNECT from XV1 8 S_1 to TB2 2 Sj v f Cut both leads...

Page 15: ... S5 to XV5 6 C t 21 Cut both leads on a 6 8KO 1 2W 10 blue gray red silver RESISTOR R38 to 1 2 CONNECT from XV5 7 S1 to XV5 GG S1 l 22 Cut both leads on a 1 ufd 400V 20 MYLAR CAPACITOR C8 to 3 4 CONNECT from XV5 1 C to TB3 5 C 23 Cut both leads on a 47KO 1W 10 yellow violet orange silver RESISTOR R41 to 3 4 CONNECT from XV5 1 S2 to TB3 4 C _ 24 Cut both leads on a 2 2KO 1W 10 red red red silver RE...

Page 16: ...m HOLE F CONNECT the THICK BROWN WIRE to TB8 3 C U Connect one side of the LINE CORD to TBS 1 S2 and the other side to XFl 1 Sl 9 Connect a 9 piece of THICK BROWN WIRE to TB8 3 C ROUTE the other end through HOLE C to the top of the chassis It will be connected later l 10 Cut both leads on a 270Kil 1 2W 10 red violet yellow silver RESISTOR R27 to 1 2 CONNECT from XV3 9 C to TB8 3 C 1 11 Cut both le...

Page 17: ... to XV3 GG Sl Lb Connect the BLUE WIRE to XV3 4 Sl t c Connect the WHITE WIRE to XV3 5 Sl t t Route the LONG GREEN WIRE through HOLE C It will be connected later e Twist both RED WIRES together Run them along the chassis as shown Connect one lead to XV6 1 S2 and the other lead to XV6 6 S2 t i Twist both YELLOW WIRES together Connect one lead to XV5 5 S3 and the other lead to XV5 9 S3 L g Connect t...

Page 18: ... three SMALL RUBBER GROMMETS as shown Insert both LARGE RUBBER GROMMETS as shown Snap both No 6 32 TINNERMAN NUTS into place Mount the POT BRACKET as shown SECURE it with two No 6 32 x 5 16 screws two 6 lockwashers and two No 6 32 hex nuts Under one side place a No 6 lug as shown Snap the 18017 POTENTIOMETER R19 to the bracket as shown Rotate the POT so that the lugs are facing the rear chassis 7 ...

Page 19: ...be connected later _ 10 Connect a 7 piece of THICK BLUE WIRE from R21 3 S1 to TB13 3 C rTl Connect a 5 piece of THICK BLUE WIRE from R23 1 S1 to TB13 1 C GENERAL Before going on with the next figure please review all of the preceding steps pertaining to Figure 12 for any possible errors FIGURE 13 1 From HOLE H connect the BLACK WHITE COTTON COVERED WIRE of the TWISTED BLACK WHITE and BLACK pair to...

Page 20: ...er _ 2 From HOLE E ROUTE the THICK ORANGE WIRE through HOLE I It will be con nected later 3 From R21 2 ROUTE the THICK VIOLET WIRE through HOLE J It will be connected later 4 From HOLE G ROUTE the TffiCK GREEN WIRE through HOLE K It will be connected later 5 From HOLE D ROUTE the TffiCK BLUE WIRE through HOLE L It will be connected later 1 Connect a 4 piece of ORANGE WIRE to R19 1 S1 ROUTE the fre...

Page 21: ...O 1 2W 10 brown black yellow silver RESISTOR R25 to 1 2 CONNECT from XV7 1 C to XV7 2 S1 2 Connect a 5 piece of THICK GRAY WIRE from TBl l 4 C to XV7 3 S1 t 3 From HOLE J connect the THICK VIOLET WIRE to XV7 4 S1 A From HOLE M connect the THICK RED WIRE to XV7 8 S1 5 From HOLE K connect the THICK GREEN WIRE to XV7 9 S1 6 From HOLE L connect the THICK BLUE WIRE to XV7 10 S1 From HOLE C twist the TH...

Page 22: ...NSTRUCTIONS PAGE 31 FIG 7 3 Insert the 1 amp fuse F1 into the fuseholder XF1 4 Turn all switches and potentiometers on the FRONT PANEL to their EXTREME COUNTER CLOCKWISE positions 5 INSTALL one LARGE DARK GRAY KNOB over the VERT GAIN SHAFT and one over the HORIZ GAIN SHAFT Position each KNOB so that the WIDTE LINE points downward on the FRONT PANEL Tighten the setscrew in each knob 6 INSTALL one S...

Page 23: ... screw just enough to catch the threads The clamps should be loose enough to move up and down and rotate 3 Place the SCREEN the printed surface facing in into the PLASTIC BEZEL 4 Remove the backing from the four pieces of FELT Place them on the inside surface of the four protrusions on the PLASTIC BEZEL 5 Insert the CRT TUBE V9 into the rear of the PLASTIC BEZEL Rest the base of the tube on the bo...

Page 24: ...will fit snugly against the lip around the cabinet SECURE it with two No 8 32 x 3 8 SCREWS in the lower part of the cabinet NOTE A removable GREEN FILTER is supplied with your kit If you wish to use the filter fold the tabs at right angles to the surface of the filter and insert into the FRONT of the PLASTIC BEZEL You have now completed building your fine instrument IN CASE OF DIFFICULTY If the co...

Page 25: ...rlapping ranges external or internal sync fully auto matic sync on all ranges full retrace blanking SWEEP RANGE switch also selects internal 60 cycle sine wave sweep and input to HORIZ INPUT terminals CRT CIRCUIT Flat face 3 inch CRT 1500 volts accelerating potential intensity and focus controls on front panel astigmatism adjustment without cabinet removal TUBES 2 12AU7 1 6BL8 1 6D10 1 6X4 1 1V2 1...

Page 26: ...een the HORIZ INPUT terminal and ground is applied to the input of the horizontal amplifier The HORIZONTAL GAIN control is effective only at the EXT HOR position of the SWEEP RANGE switch It allows continuous adjustment of the horizontal amplifier gain when an external signal volt age is applied to the HORIZ input terminals At all the internal sweep positions and the 60 CPS LINE position fixed ful...

Page 27: ...ion and is not affected by the HORIZ GAIN control 7 Set the SWEEP RANGE switch at EXT HORIZ Notice that the horizontal line returns to a spot as the horizontal amplifier is now connected to the HORIZ INPUT and ground terminals Any signal applied to the HORIZ INPUT and ground terminals will cause the line to lengthen horizontally in proportion to the peak value of the applied signal In this positio...

Page 28: ...such a time base on the horizontal axis the time in seconds represented by the overall hori zontal deflection being equal to the reciprocal of the sweep frequency in cycle per second If the frequency of the observed signal is equal to the sweep frequency one complete cycle will be observed on the screen If the frequency of the applied signal is twice the sweep frequency two complete cycles will be...

Page 29: ...fferences indicated exist I 0 0 J 1800 Figure 3 1 1 Ratio of Lissajous Patterns 2 1 3 1 4 1 1 2 1 3 1 4 00 maiDS A I c D Figure 4 Lissajous Patterns In general to determine frequency ratio from the Lissajous figure count the number of points of tangency to horizontal and vertical lines drawn or imagined see Fig 4 Points of tangency at the top of the figures result from the unknown frequency applie...

Page 30: ... output from the amplifier that results when the square wave has under gone differentiation This will happen when the grid resistor or the coupling condenser is too low in value or if the coupling condenser is partially open Lastly Fig 6i shows a square wave with damped oscillations following the leading edge This results when a high frequency square wave is fed to an amplifier in which distribute...

Page 31: ...o show two complete lines of the signal SECTION IV MAINTENANCE 4 1 GENERAL Included in this section are instructions for trimmer capacitor C 1 adjustment trouble shooting and parts replacement 4 2 REMOVAL FROM CABINET To remove the instrument from the cabinet first disconnect it from the power line and remove the two No 8 32 x 3 8 machine screws in the cabinet rear Then slide the chassis out the f...

Page 32: ... and Adjustment Points Under compensation and over compensation are indicated by square waves appearing as in Figs 9a and 9b respectively Proper compensation is indicated by square waves appearing as in Fig 9c 0 0 0 Figure 8 Trimmer Adjust Pattern 31 Figure 9 Trimmer Adjust Pattern ...

Page 33: ... be found and replaced before a new fuse is inserted 4 7 TROUBLESHOOTING CHART SYMPTOM Pilot light fails to light Fuse F1 blows when AC power is turned on Some or all filaments fail to light TROUBLE POWER SUPPLY INTENSITY switch in OFF position No AC line voltage Pilot lamp open Fuse defective Power transformer defective Broken lead or leads in the filament path Shorted AC line cable on the primar...

Page 34: ...to the cathode of V7 R21 defective R19 defective Note R21 is the focusing poten tiometer Its action is dependent on the setting of the astigmatism potentiometer R19 For best focus both pots must be adjusted simultaneously as an initial ad justment No horizontal positioning Refer to horizontal amplifier No vertical positioning Refer to vertical amplifier Astigmatism control in operative No sweep ho...

Page 35: ...ctive C3 open Open leads C 1 out of adjustment R8 defective Loose connection in vertical amplifier section One of the tubes microphonic Line voltage variations HORIZONTAL AMPLIFIER C7 open V5 defective C l3 shorted S3 defective R43 R44 R45 R46 R47 defective Replace the defective capacitor Replace Replace V4 Check Replace if necessary Replace Replace Check Replace if necessary Check Vl Replace if d...

Page 36: ...ts e Have you observed any pecularity about a part If a part appears charred or otherwise damaged by excessive heat please say so If you think you have damaged a particular part in the assembly or wiring please say so In conjunction with the symptoms the consultant may be able to determine whether such a part is likely to be defective f Have you gone through any trouble shooting procedure that may...

Page 37: ...l 2 047 1600V R49 INT 1 r K lOW EXT R50 330 420V 2W VI AST l R20 4 7M R21 FOCUS 2M R22 IM 1 R23 500K INT R24 330K I V2 V4 17 I I V5 V6 V7 CRT Fl CJ BL K l A 7VAC 60 V o o BL K 52 J 4 I UJ 10011 J 8 w o 400VDC i J 6 J7 lND C T l l c13 1 ov SC HEMATIC DIAGRAM CONDITIONS OF DC AND AC VOLTAGE MEASUREMENT I LINE VOLTAGE AT 117V 60 2 _ 1NTENSITY AT MAX 3 SWEEP RANGE AT 100 IK POT VERNIER AT MIN 4 VERTIC...

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Page 39: ...10 res car 680K l 2W 10 res car 330K l 2W 10 res car 6 8K l 2W 10 res car 22K l 2W 10 res car dep 990K l 2W 5 cap disc lOOpf 500V 10 1 1 1 3 1 1 1 1 A54 45 11 4 Envelope 10433 10452 10849 10851 10853 10855 10857 11500 22549 res car 560n l 2W 10 res car 8 2K l 2W 10 res 47K lW 10 res 22K lW 10 res lOK lW 10 res 4 7K lW 10 res 2 2K lW 10 res car dep lOK l 2W 5 cap disc 003mfd 500V 10 1 1 3 1 1 1 1 1...

Page 40: ...p car lOK 2W 10 car 3300 2W 10 mylar 22mfd 200V 10 mylar lmfd 400V 10 A54 45 17 Bag 1 1 1 2 1 1 1 1 1 14300 res w w lOK lOW 10 1 18017 pot spec white 2MS1 snap in 1 linear 20090 cap mylar lmfd 1600V 10 2 20096 cap mylar 047mfd 1600V 10 1 MODEL 54 45 PACKAGE 6 KIT STOCK DESCRIPTION A54 45 19 4 Envelope tf6016 foot plastic L 59308 felt cushion CRT A54 45 20 Bag t 53036 53037 i 53040 i 53041 59304 i ...

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