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RCA 54-45 Manual

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OSCILLOSCOPE
MANUAL
MODEL 54-45
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Summary of Contents for RCA 54-45

  • Page 1 OSCILLOSCOPE MANUAL MODEL 54-45 . ::>;)� . >"...

  • Page 3: Te Rminal Strips

    UNPACKING YOUR KIT To ascertain if you have received all of the parts required to build this kit, you may check the parts against the PARTS LIST. When unpacking each kit, handle all the parts carefully so that you will not damage any delicate components .

  • Page 4: Fuse And Fuseholder

    In the ROTARY SWITCH shown, S3A-6 refers to switch S3, the rear of the wafer, (looking in from the rear) solder lug No . 6. ROTARY SWITCHES are viewed from the rear and the pins are numbered in a counterclockwise manner.
  • Page 5 If after having checked all your components against the parts list, you find that you can not identify 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.
  • Page 6 Components such as RESISTORS and CAPACITORS, may have longer leads than specified. Cut the leads to the length indicated in the particular construction step. This length is to be measured from the body of the component. In the case of insulated leads, strip 1/4" of insulation off from the ends and twist the strands (if any) of the wire together.
  • Page 7 OTE : Package 1 contains parts for Figs. 1 and 2 (Study Group 5) Figs. 3, 4, 5 and 6 (Study Group 6} Figs . 7 and 8 (Study Group 7} Figs. 9, 10, 1 1 and 12 (Study Group 8} Figs.
  • Page 8 FIGURE 2 1 . ( ) Mount the (62017) SPDT SLIDE SWITCH , S 1 , as shown. SECURE it with two No . 4-40 x l/4" flathead screws and two No . 4-40 Tinnerman nuts . Position the nuts so that the curved surface is facing the·...
  • Page 9 MIDWAY between the edge of the frame and bezel wall, as shown in the detail. SECURE it with one 3/8" flatwasher and one 3/8" hex nut, but do not tighten. 4. ( ) MOUNT the (16011) 2 MEG•l POTENTIOMETER, R21, as shown. BEND the locating TAB out of the way.
  • Page 10 ( ) Place the threaded portion of the BINDING POST through the double "D" hole in the PLASTIC PLATFORM. ( ) Secure the assembly from the rear of the panel using the hardware supplied in the following order: one No. 8 flalwasher, one No. 8 splitwasher, one No. 8-32 hex nut, one No.
  • Page 11 FIGURE 5 Connect a 3/4" piece of BARE WIRE from XV1-1 (C) to XV1-3 (S1). �. ( ) CUT a 5" piece of BLACK COAXIAL CABLE. STRIP off 3/4" of the outer insulation from both ends so that the braided shield is visible. NOT CUT the braid.
  • Page 12 ( ) Connect a 10" piece of BLUE WIRE to TB7 -5 (C). ROUTE the other end along the chassis as shown. L21:. ( ) Connect a 5-1/2" piece of GREEN WIRE to TBl-1 (C). ROUTE the other end through HOLE "B".
  • Page 13 "WW - � 12. ( ) Connect a 4-1/2" piece of GREEN from TB3-1 (C) to XV5-2 (S1). 13. ( ) Connect a 4-1/2" piece of YELLOW WIRE from XV2-9 (S3) to XV5-9 (C). GENERAL: Before going on with the next figure, please review all of the preceding steps pertaining to Figure 6 for any possible errors.
  • Page 14 16. ( ) Cut both leads of a . 25 ufd, 600V MYLAR CAPACITOR, C7, to 3/4". CONNECT from TB3-1 (C) to S3A-6 (S1). 4-11 . ( ) From TB6-2, CONNECT the GRAY WIRE to S3B-5 (S2). - 18. ( ) CONNECT a 5-1/2" piece of GRAY WIRE from R40-2 (S1) to S3A-10 (S1). �r v t 9.
  • Page 15 '-' 1 2. ( ) Cut both leads on a 100 uuf DISC CAPACITOR, C15, to 3/4". CONNECT from XV4-2 (C) to XV4-7 (C). 1W, 10 % (yellow, violet, orange, silver) RESISTOR, R33, to '-- 13. ( ) Cut both leads on a 47K 3/ 4".
  • Page 16 FIGURE ----1' . ( ) Connect a 5-1/4" piece of RED WIRE to TB9-2 (C). ROUTE the other end through HOLE "C" to the top of the chassis. It will be connected later . ..:. 2. ( ) From TBl0-1. CONNECT the RED WIRE to TB9-2 (C). •·3 .
  • Page 17 NOTE: The next step refers to Figure 2. 14. ( ) Mount the TRANSFORMER, Tl, to the chassis and position it so that the RED WIRES face the REAR APRON as shown in Figure 2. SECURE it with four No. 8-32 x 3/8 screws, four No.
  • Page 18 6. ( ) Cut both leads on a 150K O , 1/2W, 10 % (brown, green, yellow, silver) RESISTOR, R32, to 1/2". CONNECT from TB6-2 (S3} to TB6-3 (S3}. ( ) Cut both leads on a 330 2W, 10 % (orange, orange, brown, silve1·) RESISTOR, R50, to 3/4".
  • Page 19 FIGURE 12 _.. 1 . ( ) From HOLE "F", connect the THICK GREEN WIRE to R23-2 (S1). ( ) From HOLE "F", connect the THICK BROWN WIRE to R23-3 (S1). _3. ( ) From HOLE "B", connect the GREEN WIRE to R47 -3 (S1). ( ) From HOLE "B", connect the YELLOW WIRE to R47 -1 (S1) .
  • Page 20 6. ( ) Cut both leads on a 1MO, 1/2W, 10 % (brown, black, green, silver) RESISTOR, R22, to 3/4". CONNECT TB13-1 (S2} to TB13-3 (S2}. _7. ( } Cut both leads on a . 22 ufd, 200V MYLAR CAPACITOR, C20, to 1". CONNECT from TB12-2 (C) to S3A-12 (S1).
  • Page 21 ,..- - 3 . ( ) From HOLE "M", connect the ORANGE WIRE to C 13 -A (C) . ,..A . ( ) From HOLE "C", connect the ORANGE WIRE to C 1 3 -A (C) . ,..& . ( ) From HOLE "C", connect the RED WIRE to C 1 3 -B (S1) .
  • Page 22 STEPS FINAL You have completed the assembly and wiring of your 54-45 OSCILLOSCOPE. When you have completed the final steps and Figure 17, your unit will be ready for use. 1. ( ) To catch any wiring errors, it is suggested that the entire wiring be checked point-by-point against the wiring instructions (and preferably against the schematic wiring diagram (Pg.
  • Page 23 DO NOT PLUG the unit into the AC Line. Turn the unit on by turning the "INTENS" KNOB clockwise. Check for a resistance of at least across the AC line plug. Check for a resistance of at least 50KO from XV6-7 to ground. If any resistance is smaller than the number specified, recheck the circuit.

  • Page 24: In Case Of Difficulty

    The information provided may itself lead to a solution of the problem without outside assistance, and also includes the course of action you may take to ob­ tain assistance from RCA Institutes, Inc. In any case, do not neglect the checking procedures which usually correct of the difficulties that may be encountered.

  • Page 25: Specifications

    OPERATING INSTRUCTIONS SEC TION I. FEATURES AND SPECIFICATIONS The RCA Institutes Model 54-45 is a high quality, general purpose 3-inch CRT Oscilloscope with the performance capabilities required in general laboratory and service work. 1- 1. FEATURES 1. Compact, lightweight design. Fits on any bench, goes anywhere.

  • Page 26: Operation

    The VERTICAL POSITION and HORIZONTAL POSITION controls adjust the location of the trace on the screen. Turning the HORIZONTAL POSITION knob shifts the trace left or right, and turning the VERTICAL POSITION knob moves the trace up or down. The VERT. INPUT and ground terminals provide for connection of external signals to the vertical amplifier.
  • Page 27 tests . These tests will also assure you that the instrument is in proper working condition. However, do not attempt this procedure before all final checks have been completed and initial adjustments have been made as described in the MAINTENANCE section. 1.
  • Page 28 NOTE 2 : At low sweep frequencies , flickering of the pattern is normal due to the slow writing speed of the spot and the persistence of the screen, which together are insufficient to cause the motion to blend into a fixed image. SEC TION III.
  • Page 29 LISSAJOUS PATTERNS: Another type of fundamental pattern is obtained when both the vertical and horizontal deflection voltages are sinewaves that are related in frequency as follows : one frequency is a whole number of times larger than the other; one frequency is a simple fraction of the other . When one or the other of these conditions is fulfilled, stationary closed-loop patterns are obtained.
  • Page 30 First, as a means of comparison, the square wave output from the Audio Generator is viewed on the scope. The horizontal sweep of the scope should be adjusted so that at least two full cycles can be seen on the screen. ( Fig. 6a shows one full cycle of a perfect square wave). The 'scope is then connected to the output of the amplifier under test so that the modified square wave can be viewed on the screen.

  • Page 31: Removal From Cabine T

    SE RVICING TV RECEIVERS : One major use of the scope in tv servicing is alignment in conjunc­ tion with a TV /FM Sweep Generator. First, the IF stages are aligned, and then the RF and local oscillator stages, following the general method and theory of alignment described in the sweep generator instruction manuals .
  • Page 32 .,... - - - " AST ADJ. C RT ATTEN. COMP. TRI MMER Figure 7 . Tube Layout 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 Fig.

  • Page 33: Tube Replacement

    4-4 TROUBLESHOOTING As an aid in localizing trouble, common symptoms together with their possible causes and reme­ dies have been listed in groups corresponding to the major sections of the instrument. Of cours.e, all possible troubles could not be included in the chart and the make-up of the chart has been based on the assumption that the instrument has worked properly at some previous time.
  • Page 34 C RT CIRCUIT No spot on CRT screen High voltage rectifier tube, V3, Replace defective Filament leads broken Repair No voltage on second anode Check circuit. Repair if necessary Note: Spot may be deflected off screen. Adjust V-POS . control for equal voltages from CRT pins 6 &...

  • Page 35: Vertical Amplifier

    SWEE P CIRCUIT (Cont'd. ) Sweep inoperative on One of C l7 - 20 defective Replace the defective capacitor* some ranges S3 defective Replace Loss of synchronization V4C defective Replace V4 S4 defective Check. Replace if necessary C 14 open Replace Sync leads defective Replace...

  • Page 36: Parts Replacement

    SECTION V. SE RVICE POLICY SERVICE CONSULTATION If you are experiencing trouble that you cannot diagnose yourself, you are invited to avail your­ self of our Consultation Department. The consultant handling your inquiry will make every effort to diagnose the cause of your particular difficulty based on the information that you provide. Please be as thorough as possible.
  • Page 39 MODE L 54-45 - PACKAGE #3 KIT STOCK# S TOC Kf DESCRIPTION DESCRIPTION AM' T. AM'T. A54-45 - 10 (#4 Envelope) 10 107 res . , car. , lOOn, l/4W, 10% 10406 res . , car . , 680n, l/2W, 10% 10408 res.
  • Page 40 MODEL 54-45 - PACKAGE #5 KIT AM'T. STOCK# STOCK# DESCRIPTION DESCRIPTION AM'T. A54-45-18 (#4 Envelope) £-10418 res., car., 4. 7M, l/2W, 10% 10407 res. , car. , 1M, 1/2W, 10% £- 10410 res., car. lOOK, 1/2W, 10% �--- 1 0425 res., car., 56K, 1/2W, 10% ...

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