RCA-Victor-Co-Inc-5X2 电路原理图.pdf

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1、FREJUENCY RANGES Standard broadcast540-1,800 kc.Standard broadcast 600 kc(osc.); 1,700 kc. Short-wave-1,800.6,500 kc. (osc. and ant.) Short-waveNone Required Intermediate Frequency 460 kc. RAniomoN COMPLEMENT (3) RCA -75Second Detector, A -F, and A.V.C. (1) RCA -6A7First Detector -Oscillator (4) RCA

2、 -41Power Output (2) RCA -78.Intermediate Amplifier (5) RCA -12Z3Rectifier POWER SUPPLY 200,250 volts, 50.100 cycles120 watts 100.250 volts, D -C110 watts POWER OUTPUT LOUDSPEAKER Undistorted0 9 watts A -C, 0.7 watts D -CType Electrodynamic Maximum1 watts A -C, 1.6 watts D -C Voice Coil Impedance2.2

3、 ohms at 400 cycles Pilot Lamps (2) Mazda No. 40, 6.3 volts, 0.15 amperes PAGE 49-B MODEL 5X2 Five -Tube, Two -Band, AC -DC, Superheterodyne Receiver Electrical Specifications MODEL 5X2 Ifdistortionorpoorsen itivityap- parent, check the connections of the Brown and Blue -Yellow leads ofthe speaker f

4、ield to certify that theyareproperly attached to the connector terminals. .ALIGNMENT FREQUENCIES Schematic Circuit Diagram err. cot CIPINICTItild 1I r Nor COmmecTIONS RCA VICTOR DIVISION OF RADIO CORPORATION OF AMERICA, CAMDEN N. J., O. S. A 收音机爱 好者资料库 RadioFans.CN PAGE 50-B 5X2 L_ A.C. 134V. RECT.

5、12Z3 240 V. t25y122V. IrA V1* 1 (-19.5V. -0.3 V. OUTPUT L_ 43 BIAS CELL CHECK SEE TEXT f t 134V. (93V.*) I row 30V. IIrA 11 II r -64V.-, 1A.C.1 _-1 i 1st D6EAT7. 4 604SviC. PRI. ADJ. 2.I. F. TRANSF. TERM. BRD. A.C.I I.F. 1- -I 111 78 C.G. te,) C.G. i 2.13v1 ism 1. F. I I I Cs ITRANSF. I I II OSC.OV.

6、 II 600 K.C. I 1(.1-Ty.*)1 eavi Dv.I1I 12.6v.1134V. ADJUST FROM II80vl SIDE OF CHASSIS I-8V- ilay. 1 134 V. BOTTOM1 1I *1*FRONT OF CHASSIS * *t ov. o j_2 DET., AUDIO, i)A.V. C. 1 75 460 K.C. PRI. ADJ. _C* P-727741-4, CAUTION: NEVER CONNECT VOLTMETER TO CONTROL GRID OF TUBE N. 3 ( R CA -15) -SEE TEXT

7、 Radiotron Socket Voltages and Trimmer Locations Measured at 230 volts, 60 cycle supply-For 230 volt D -C approximately 10% lower Tuned to approximately 1,000 kc. (Standard broadcast position)-No signal being received- Volume control setting optional Note:Two voltage values are shown for some read-

8、ings. The higher value shown in parenthesis with asterisk (*) indicates operating conditions without voltmeter load- ing.The linver value is the actual measured voltage and differs from the higher value because of the additional loading of the voltmeter through the high series circuit resistance. Al

9、ignment Procedure DIAL CALIBRATION: With tuning condenser fully meshed set point- er to bottom horizontal line at low frequency end of BC scale. Do not connect external ground to chassis. STEP CONNECT HIGH SIDE OF TEST OSC. TO - TUNE TESTOSC TO - MN RADIO DIAL TO ADJUST THE FOLLOWING FOR MAX. OUTPUT

10、 1 I -F Grid in series with 0.01 mfd. 460 kc Quietpoint nearn 600 kc owl! Band L11 2nd I -F Trans. 2 1st Det. Grid in series with 0.01mfd L10L9 1st I -F Trans. 3 Antenna in series with 80 amid Ll(Wave Trap) Minimum Output 4 1700 kc 1700 kc BC Band C12Ce Osc.Ant. 5600 kc 600 kc BC Band C8(L -F Osc. )

11、 Rock Gang 6Repeat Step 4 CAUTION: The voltage between the RCA -75 control grid and ground should never be measured. All ordinary meters will paralyze the Bias Cell, see figures 1 and 2, inthis circuit for a period of approximately one to two hours.To check Bias Cell, connect 0-1 M.A. milli. ameter

12、as shown on figure.A satisfactory cell should give a steady reading on the meter between 0.3 and 0.65 M.A. when used with a good RCA -75 tube. OUTPUT SLACK TRANSF. 350.n C73 4Q CABLE PLUG Or BUIE &YELLOWBROW GREEN SPEAKIR PLUG 1C3.1-50- BLUE BLACK 40BROWN I3LACKBROWN Loudspeaker Wiring -81060-. 113

13、VOICE COIL 19,. 114 HUM EUT. IL o.r 115 FIELD COIL 1900n TOTAL RED 收音机爱 好者资料库 RadioFans.CN PAGE 51-B DIAL INDICATOR PULLEY - -, . 5 I 11. CONDENSERk SHAFT PULLEY TUNING DRIVE SHAFT 3451A1411 FINISH Moping Drive Cord Mcchanisw ViaTURNS 5X2 Rear view of drive assembly showing threading of drive cord w

14、ith variable condenser plates in full mesh. To per- form this operation, unsolder the four leads (connected between antenna coil and range selector switch) from the range selector switch, unsolder antenna lead-in wire from wave -trapterminal,unsolder lead from rear section of gang tuning condenser,

15、and remove the four screws which secure the tuning drive frame to the chassis proper. This frame with gang tuning condenser still attached may now be easily removed for the threading operation. REPLACEMENT PARTS STOCo.N. DESCRIPTION NoK STOCK DESCRIPTION RECEIVER ASSEMBLIES 4794Socket -4 -contact 12

16、Z3 Radiotron socket 11409Band -Rubber band for first I.F. Transform 4786Sockron sockett mer-Package of 5 4787Socket -7 -contact 6A7 Radiotron socket. 12118Cap -arid contact cap -Package of 5 12007Spring -Retaining spring for Stock No. 11978Capacitor -Adjustable capacitor (C8) 12006 -Package of10 125

17、35Capacitor -13 Mmfd. (C10) 12403Transformer -First I.F.transformer with 12405Capacitor -47 Mmfd. (C18) shield (L9, L10, C15, C16) 12404Capacitor -120 Mmfd. (C15, C16) 12676Transformer -SecondI.E.transformer 12406Capacitor -180 Mmfd. (C19) complete with shield (L11, L12, C18, 12694Capacitor -220 Mmf

18、d. (C2) C19, R3) 12537Capacitor -560 Mmfd. (C1) 12497Trap -Wave trap(L1) 12536Capacitor -820 Mmfd. (C21) 12394VolumeControl - Controlandpower 12534Capacitor -1,170 Mmfd. (C9) switch (R8, S1) 4868Capacitor -.005 Mfd. (C7) 4858 Capacitor -.01 Mfd. (C4, C20, C23, C25) DRIVE ASSEMBLY 4836 12078 Capacito

19、r -.05 Mfd. (C3, C14, C17) Capacitor -.05 Mfd. (C26, C27) 12401Condenser-2,gangvariabletuning con - 4841 Capacitor -0.1 Mfd. (CU, C22) denser (C5, C6, C11, C12) 12682 12677 Capacitor -10 Mfd. (C24) CapacitorSections16 Mfd. 12420Cord -Variabletuningcondenserdrive cord -Package of5 -2each(C28, C29) 12

20、608Dial -Stationscale 12681Cell -Bias cell for Stock No. 12676. 12419Indicator -Station selector indicitor pointer 12495Coil -Antenna coil (L2, L3, L4, L5). 12416Pulley -Indicator pointer shaft and pulley 12680Coil -Coil windings and form only for second I.F. transformer Stock No. 12676 12417Pulley

21、-Variable tuning condenser pulley and set screws (L11, L12). 12418Screw -8.32x3/16milledhead,cupped 12496Coil -Oscillator coil (L6, L7, L8) point, set screw for pulley Stock No. 12006Core -Adjustable coreforStockNo. 12417 -Package of 10 12403, 12497 and 12676 12422Shaft -Variable condensertuningknob

22、 4340Lamp -Dial lamp -6.3 volt -Package of 5 shaft 12409Lead -Antennalead -approximately 20 feet long 12421Spring -Drive cord tension spring -Pack, age of 10 12395Range Switch -(S2, S3, S4, S5) REPRODUCER ASSEMBLY 12697Resistor -100 ohm, flexible type (R14) - Package of 5 12641Board -Reproducer term

23、inal board 12481Resistor -330 ohm, insulated, % watt, (R3) -Package of 5 12640Bracket -Outputtransformermounting bracket 12414Resistor -560 ohm, insulated1/4watt, 12674Coil -Reproducer field coil (L15) (R6) -Package of 5 11469Coil -Reproducer neutralizing coil (L14) 12265 Resistor -6,800 ohm, insula

24、ted, % watt, ( R1 )-Package of 5 12642Cone -Reproducer coneanddustcap (L13) 12695Resistor -15,000 ohrp, insulated, Xt watt, (R4) -Package of 5 12493Connector-5,contactfemaleconnector for reproducer cable 12412Resistor -47,000 ohm, insulated, .4watt, (R7) -Package of 5 12567Connector-5,contact male c

25、onnector for reproducercable 12286Resistor -56,000 ohm, insulated, 34 watt,9711Reproducer complete (R2) -Package of 5 11828Transformer -Output transformer (T1). 12696Resistor -68,000 ohm, insulated, % watt, (R13) -Package of 5 11886Washer -Spring washer to hold field coil securely -Package of5 12263

26、Resistor -100,000 ohm, insulated, IA watt, (R11) -Package of 5 MISCELLANEOUS ASSEMBLY 12452 Resistor -330,000 ohm, insulated, Vs watt,12548Crystal -Dial escutcheon and crystal. (R10) -Package of 512673 Knob -Station selector, volume control or 12285 Resistor -470,000 ohm, insulated, 7/t watt, range

27、switch knob -Package of 5 (R12) -Package of 512672 Resistor -Wire wound ballast and line re. 12679 12008 Resistor -2.2 Megohm, insulated, Xt watt, (R5, R9) -Package of 5 Shield -First I.F.transformer shield sistor comprising, two 280 ohm sections and one 42 ohm section(R15, R16, R17) 12607Shield -Fi

28、rst I.F. transformer shkld top11210Screw -Chassis mounting screw assembly 12218Shield-Radiotronshield comprising1screw,1lockwasher and 12678Shield -SecondI.F. transformershield 1washer -Package of 4 complete with bias cell holder4119 Screw -Set screwforknob Stock No. 12400Socket -Dial lamp socket 12673 -Package of 20 收音机爱 好者资料库 RadioFans.CN