RCA-Victor-Co-Inc-15U 电路原理图.pdf

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1、PAGE 24i-B RI 560.000., U-If RAMS 5.11F. MR. 6K1 0 2.4 I F. TRANS/. AMR. nom FAMP S fi IA MODEL 15U Fifteen -Tube, Five -Band, A -CRadio Phonograph Tyl:tiNeG , uumv.ousAa 6 11T AUDIO 7 55413 SIC.ADISICAli 127 460AC460KC L2.9 460 K.C. 14CPFINDER MIPS -Radiotron and I -F Trimmer Locations FREQUENCY RA

2、NGES -Long Wave (X)150.410 kc Standard Broadcast (A)530.1,800 kc Medium Wave (B)1,800.6,400 kc Short Wave (C)6,400.23,000 kc Ultra Short Wave (D)23,000.60,000 kc Intermediate Frequency RADIOTRON COMPLEMENT (1) RCA -6K7R -F Amplifier ( 2) RCA -6L7First Detector (3) RCA -6J7Heterodyne Oscillator ( 4)

3、RCA -6K7First I -F Amplifier (5) RCA -6K7SecondI -FAmplifier (6) RCA -6H6Second Detector and A.V.C. (7) RCA -6C5Audio Voltage Amplifier MODEL 15U REFERTOINDEX FORSERVICEDATA ON AUTOMATIC RECORD CHANGER Electrical Specifications ALIGNMENT FREQUENCITT Long Wave (X) 175 kc (osc.), 350 kc (osc., det., a

4、nt.) Standard Broadcast (A) 600 kc (osc.), 1,500 kc (osc., det., ant.) Medium Wave.(B).6,000 kc (osc., det., ant.) Short Wave (C).20,000 kc (osc., det., ant.) Ultra Short Wave (D). 57,000 kc (osc., det., ant.) 460 kc ( 8) RCA -6E5Magic Eye Tuning Indicator ( 9) RCA -6L7Audio Volume Expander (10) RCA

5、 -6C5Audio Driver Amplifier (11) RCA -6C5Expander Amplifier (12) RCA -6H6Expander Rectifier (13) RCA -2MPower Output (14) RCA -2A3Power Output (15) RCA -5Z1Full -Wave Rectifier Mazda No. 40, 6.3 volts, 0.15 ampere Pilot Lamps (6) POWER -SUPPLY RATINGS Rating A-6 Rating A-5 105.12 5volts, 60 105.12 5

6、 volts, 50 For 220 -volt operation, a step-down transformer (Stock No. 7217) Fuse Rating 3 amperes PHONOGRAPH TypeAutomatic Record EjectorUndistorted 12 watts Record CapacitySeven 10 -inch or Six 12 -inchMaximum 15 watts Turntable Speed78 R.P.M. LOUDSPEAKER Type of PickupLow -Impedance MagneticType

7、Super 12 -inch Electrodynamic Impedance (V.0 )Pickup Impedance100 ohms at 1,000 cycles POWER -OUTPUT RATINGS RADIO ONLYTOTAL cycles180 watts205 watts cycles180 watts210 watts must be used. 11% ohms at 400 cycles RCAVICTOR DIVISION OF RADIO CORPORATION OF AMERICA, CAMDEN N. J., U. S. A 收音机爱 好者资料库 Rad

8、ioFans.CN r MMEIS CI CL-. N. CIS CM LUAGAF CIS NNW CI6 - 2-ILMAGT _L CT 36 MM V X 125. ING. LS CS v cos MMF EGG.% oil U3 C20 Cal .4,. 335 saw CIS L-20 MMF. C23 141141111P R.F. SAT C37= Limo. 3 C24 Si MMF 1W- OICT.F LONL27 a.-/ 340.000i SLT tit.I4-1sr U. SMi,(14 ININCTIVILTOBINNS. RANGE SELECTOR SWIT

9、CH *Nowt. It. POSITION3,ROTATES CLIKANTS. sway 4 GROAD FIDELITY SW row issa solw-r) MUSIC SPEECH SW. 33004 C54 Ur NUMERALS SHOWN SUMO THIS UNE INDICATE CONTACT NUPAISEAS ON TANG. GRAIN IMAM STANTAI0 PAWNS MAGIC BRAIN UNIT SEE INDEX LISTING MAGIC BRAIN FOR ADDITIONAL DATA. - RE -a,. HZ-cr. OUTPUT ELL

10、. a-GREENRFC, r-, C.- GREEN BR/ e/N lean BLOr rr BROWN- BRONor -/E-GGC/dsl RER1ERS YEG,OBr BLUE BLUE YEGG004- BltrE BCRC, POWER TRRNS. CONNECTIONS 3 -7ELLUNI -GREEN DRIVER TRRNS. CONNECTIONS p 20004 REO BLUE 3900, BUIE YEG,0,4- BLUE - PICK -UP 4.n STFU POWER SW. Fl C62 56 MMF. 9 S6033 820R31 Fn, 22

11、WO R22 3.3 W0. R2.3 3 wiet PHO NO. VOL CONTR 633CT6R36 311,0004. 02snTro125.0004 T2( TOTAL a3i RA 2 100.0004 TS ALL OTNEPI NENTEAS IP AUDIO 6C5 CGS 20 TAP. R54 624 220,006aI ass C67.2.68 sso sows. CTO 1000 C135.05 MFG R46 024004 C84 IS MM. Ct6 f* R50 200s. CT OOSNWO R26 tS cio. q3 C90 ,132-assftwo C

12、68 R51 11100006 _L. C95 .mro 2.1, OCT 800EC 6H* TUNING 6E5 EXPANDER RECT. 6H6 I12 SPEAKER. FIELD Schematic Circuit Diagram C9I 270 OUTPUT 20.3 R53 51,000A W-ESSO1-0 C93 .003000 -C94 .0051433-D 11E - SW S6 L36 ID, 收音机爱 好者资料库 RadioFans.CN PAGE 243-B I sTI. F. TR ANSE. CONNECTIONS2IF. TR ANSE CONNECTIO

13、NS 0 ada C55 05 MIT CAPACITOR PACK CONNECTIONS INFOli CEOt7E1tt6.2 .5W.D. E; CRP. PROS CONNECTIONS Dynamic Amplifier Adjustments Itisessential that correct voltages and currents exist at the RCA -6L7 audio expander stage in order that the expanding function may take place in the proper manner. A scr

14、ew -driver adjustment is accord- ingly provided to regulate the RCA -6L7 control grid No.3biasto the correct operating value. Two methods of adjustment are applicable. Either method requires a normal voltage of 300 volts across the filter output. The one to be preferred (a) requires the use of an RC

15、A Stock No. 9633 Beat -Frequency Oscillator or the equivalent, a 100 -ohm resistor, a 200 -ohm re- -sistor, and a 1,000 -ohm -per -volt a -c voltmeter (recti- fier -type) having a low range of 1.0 volt and a high range of 250 volts or greater. The less accurate method (b) requires the use of an RCA

16、Stock No. 12353 Sprit -Plate Adapter, and a suitable d -c milliam- meter. Both of these procedures are outlined below. CAUTION: Before using either method, be sure that power -supply fuse is in proper position for the line voltage. (a) Preferred Method Turn power switch off. Connect the 200 -ohm and

17、 the 100 -ohm resistors in series between the beat -frequency oscillator terminals (upper 250 and CT) with the 100 -ohm resistor connected to CT. Calibrate the beat -fre- quency oscillator, adjust it to 1,000 cycles, and reduce its output. Connect the 1,000 -ohm -per - volt a -c voltmeter (1 -volt r

18、ange) to the beat - frequency oscillator terminals (upper 250 and CT). Remove the male plug from the receptacle on the shielded cable running be- tweenthe input transformer T2 and the com- pensator pack (see figure). Connect beat -fre- quency oscillator terminal CT to the large pin on the male plug.

19、 Connect the junction of the 200 -ohm and the 100 -ohm resistors to the small pin on the male plug. Adjust beat -frequency oscillator output until the voltmeter reads exactly 1.0 volt. Remove the voltmeter leads from beat -frequency oscil- lator terminals without disturbing any of the oscillator adj

20、ustments. Place the voltmeter to its 250 -volt or greater range and connect it be- YEL LOW C67 560M BLACK FILTER PACK CONNECTIONS 3 LETRANSE CONNECTIONS GREEN 6E5 TUNING TIME CONNECTIONS 15U tween the plate prongs of the two RCA -2A3 power -output tubes. Connections to the tube prongs may be made by

21、 stripping approxi- matelyinch of insulation from the ends of two short leads of rubber -covered wire, wrap- ping one bare end around each plate prong (being careful not to allow the bare ends to short on the chassis when the tubes are placed in their sockets), and connecting the volt- meter to thes

22、e leads. Set the Dynamic amplifier and Fidelity control to their extreme counter -clockwise po- sitions. Set the Phonograph volume control toits extreme clockwise position. Turn on power switch and allow a few minutes for the instrument to become stabilized. Adjust the expander -bias control R46, on

23、 rear apron of amplifier (see figure), until the voltmeter reads 195 volts. Turn Phonograph volume control to extreme counter -clockwise position. Transfer lead from the )unction of the 200- ohm and the 100 -ohm resistors to the beat- frequency oscillator (upper 250) terminal without disturbing any

24、of the oscillator adjust- ments. Adjust Phonograph volume control until the voltmeter reads 50 volts. Turn the Dynamic amplifier control toits extreme clockwise position allowing maximumexpan- sion to take place. The voltmeter should now read not less than 150 volts if the expander circuit is operat

25、ing correctly. Failure to do so indicates a defect in the system and the usual service procedure should be followed. Alternate Method Turn power switch off. Place RCA Stock No. 12353 Split -Plate Adapter under the RCA - 6L7 audio -volume expander. Connect a suit- able d -c milliammeter to the adapte

26、r. Turn both the Phonograph volume and the Dy- namic amplifiercontrolstotheir extreme counter -clockwise positions.Turn on power switch and allow a few minutes for the instru- ment to become stabilized. Adjust expander bias control R46, on rear apron of amplifier (see figure), to give 1.0 milliamper

27、e of plate current with no signal input to the dynamic amplifier. 收音机爱 好者资料库 RadioFans.CN PAGE 244-B 15U 513643 SN E XPRNDER CONTROL S.12.485 FIDE CONTROL SWITCH SA .52 4MEC. BOTTOM VIEW L REooCEIVER (TVIEW) 5_ 13610 LLD,/ 5.16620 5.11570 LOW 5.-1.197 51524 AMPLIFIER vvo 5.14644. S01; C41Ilk 541 40

28、512404 SHILD . EATN484 EMED.FOR 504 60 -MOTOR C.S.4674 5.11486 BR ARDIO -PH ON 0. SIVI A BL CH I -R D I -BLACK BRRKE SWITCH PILOT LAMP MOTOR BORRD RED GREEN BLRCH OIAPRR AMTMENTLP BROWN RC 5.1521 5.4E74 BLLE 5.1i488 RED GREEN YELLOW TOGGLE SWITCH se 13Lt-Ht BOTTOM VIEW- BLACK S.4 /7 54674. INPUT TRA

29、NS. PACK BLAC K CONNECTIONS RED OWN ED :2 LOW BLACK1046 RAL 57650.4 5.45TS WELL SPEAKER 6.13E60 (LESS 5.,I466 CONNECTOR) II SPERKi11 - TT CABLE INPUT TARNS. PACK 5.13002 BLUE THETHE5 NUMBER ADJACENT CABLES RND PLUGS INDICATES STOCK NUMBER ALL CABLES COMPLETE WITH PLUGS UNLESS OTHERWISE NOTED ADJACEN

30、T S NUMBER -Assembly Wiring COMPENSATOR P RC K CONNECT IONS LRCH UE PAGE 245-B 15U ER -270V. L.EA ,TUNING TUBE CABLE GALEN WAVE TRAP *MIL OSC.COIL OSC. COIL R.FA.C. 6157 L *zeov.-1- ODA 0 6.3V. A.0 -02V. (kr060V. Q0 -r- 270V. (8+T -110V. BRAIN -RECEPTACLE L -18VA.C. - L_ .e) 0-e- 215V. - +05C ZTO V.

31、617 vet.Lov. 6.3V. AUDIOrCC. 6C 5 rLT(:) o 5.50. 6.3V. FA.C.1R. 4.DET ; .,646(-0.3V.) 1r+1.T - -1 -015v. , 04. (-Av. ) (1.10V.) (-0.7V)-0 .1 . -op.- ov.1(-6.11 II-0.2V. I t.iV 3 I F. TRANS. r - - - -i(550):- UV. 70V A.G. C -4-t1(1.17; L*A.C)C) 431- 400 6- 9V COIL to* OET 6L7 -7 -T 6.5V. r -A.C.-1 1

32、(ease/ 115V I ,257V sorra. REAR or commit Receiver /t VOLUME EXPANDERDRIVER 17v6L7 6C5 , 6.4V.6.4V rA.C.nF-A.C. - 1, -, I - ,_-*- qD .-.71-71 OV.0 -1,1 ,(95v.);8.5v., G.C.AP .-55V. 1 260v. (15VM(2251 OV -0.5v. - - 1215v. I iie;ii 42V. 6.4v.6Av. EXPANDER RECT. 6H6 1.25v.1.25V. 2,5v.A.C. A.C.1rA.01r-

33、A.C. 1:r A.C. ;1-OUTPUT 1 5)60 t)i 21;3 ( , i13 I F. TRANS I TRANS. r r7ART AD.) 200V., Wi i3, 4-+ A.C. 110V.II _ 3.1V. A.G. 1 OD RECT. DERC Ot.17Pur AMPL(7.3v.) 325v. 5Z3 OV. 6C5 0.35V. (-6iv.-) 2A3 370v. I AI V. c. (110v.) (1.311.17.1511295v -18 V. ,370 295v.A.G. i1 -61V.300V. 2713V.-81 V. ELECTRO

34、LYTIC CAPACITORS K:4173 300V.325 V. BOTTOM OF- CHASSIS Power Amplifier -Radiotron Socket V oltag es, Coil, and I -F Trimmer Location.0 Measured at 115 volts, 60 -cycle supply-Tuned to approximately 1,000 kc-No signal being received- Both volume controls minimum-Radio-Phono switch either position Not

35、e: Two voltage values are shown for some read- ings. The value shown in parenthesis with asterisk (A) indicates operating conditions without voltmeter loading. PAGE246-B 15U BLACK n.0.7 BLACK 0 OUTPUT TRANSF. 336A. T4 i_313 :LEAD463 Transformer - Interstage transformer (T3, L35) Transformer-Power tr

36、ansformer, 105.125 11488Connector-2-contact female connector for cable stock Nos. 12491, 13621, 13623, 13626 or input transformer cable volt, 50.60 cycle (T1)4577Connector - 2 -contact male connector for cable stock No. 13642 REPRODUCER ASSEMBLIES 12565Connector -4 -contactmale connectorfor 13614Coi

37、l - Fieldcoilandmagnetassembly cable stock Nos. 13622, 13625 or 13644 (L38) 4573Connector -2 -contact female connector with 12474Cone-Reproducer cone (L36) oblong openingsforcablestock Nos. 12567Plug -5 -contact male reproducer plug 13626 or 13642 9767Reproducer-Complete 12493Connector-Speaker cable

38、 5 -contact female 12568Transformer-Output transformer (T4) connector MISCELLANEOUS CABLES AND PLUGS 12494Connector -4 -contact female connector for cable stock Nos. 12490, 13645 or com- pensator pack cable 13644Cable -3 -conductor shielded compensation cable, approximately 33 long, complete 11570Co

39、nnector -4-contact13620 male connector for cable stock No. with 4 -contact male connector-connects compensator pack to phonograph volume control 11971Connector -4 -contact female connector for cable stock No. 13624 12991Cable -3 -conductor shielded fidelity control cable, approximately 71/4 long-con

40、nects 5211 MISCELLANEOUS ASSEMBLIES Bolt - Speaker mounting bolt assembly - Package of 2 13645 fidelity control to receiver Cable -2 -conductor shielded grid switching cable, approximately 18 long, complete 4391 13615 Box-Used needle box Bracket-Tuning lamp mounting bracket and clamp with4 -contactf

41、emale connector-con- nects radio -record switch to amplifier. 13103Cap-Pilot lamp cap and bulls-eye-Pack- age of 5 13625Cable-Shielded input cable, approximately 14 long, complete with 4 -contact male connector-connects amplifier to radio- record switch 12560Compensator Pack - Phonograph compen sato

42、r pack complete with two shielded cables and connectors (L32, L33, L34, L39, C75, C76, C77, R33, R34, R35) . 13621Cable -2 -conductor pilot and compartment lamp cable, approximately 13 long, corn- 12915Crystal - Stationselector escutcheon and crystal pletewith two2 -contactfemalecon- 11580Cover-Pilo

43、t lamp cover nectors 12742Escutcheon-Tuning lamp escutcheon. 1 3626Cable -3 -conductor motor and power switch 12552Expander Control (R32) cable, approximately 71/2 long, complete 4340Lamp-Pilot lamp -6.3 volts-Package of 5 with two female connectors-connects amplifier to phonograph motor and re- 126

44、99Knob-Large station selector knob-Pack- age of 5 ceiver power switch 12700Knob-Small vernier station selector knob 13642 Cable -2 -conductor motor power cable, ap- -Package of 5 proximately 35 long, complete with one 2 -contact male and one 2 -contact female connectors - connectscablestock No 13626

45、 to motor leads Cable-Single 11347Knob-Low frequency tonecontroland power switch, radio -record switch, radio volume control, range switch, or high frequency tone control knob - Package 13623 of 5 conductorshieldedoutput cable, approximately 5 long, complete with 2 -contact female connector - con- 1

46、1582Knob-Phonograph volume control or ex - pander control knob-Package of 5 netts receiver to radio -record switch. 11607Receptacle-Needle card holder 13641Cable-Single conductor shieldedoutput cable,approximately 101/2 long, MTV 11829Roller-Record pocket slide roller-Pack- age of 2 pletewith2 -cont

47、act male connector- connects radio -record switch to radio re- ceiver 4560Screw-Chassis mounting screw assembly (front) - Comprisingonescrew,one washer and one lock washer-Package 13620 Cable -4 -conductor plate and filament sup- of 10 ply cable, approximately 9 long, cony plete with4 -contact male

48、connector- connectsreceiverto amplifierpower supply 13102Screw-Chassis mounting screw assembly (bottom) - Comprising one screw, two cushions, one spacer, one washer and one lock washer-Package of 2 13619 Cable -2 -conductor power cable, approxi- 1 1 573Socket-Pilot lamp socket mately 27 long, comple

49、te with 2 -contact male connector-connects power switch to amplifier 11349Spring-Retaining spring for knob, Stock Nos. 11347, 11582 and 12700-Package of 5 13624 Cable -4 -conductor plate and filament sup- ply cable, approximately 6 long, corn- 4982 Spring-Retaining spring for knob, Stock No. 12699-Package of 10 plete with 4 -contact female connector- connects amplifier power supply tore - ceiver 12824 12555 Switch-Radio-record switch (S6) T ra nsf ormer - Phonograph input trans- 13622 Cable -2 -conductor shielded tone control former (T2) cable, appr