RCA-Victor-Co-Inc-RE-81 电路原理图.pdf

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1、PAGE 200-A MODELS R 74, R76, R77 30, 130 Watts; 50. 139 Watts;60, 135Watts Type and number of Radiotrons.4 RCA -56, 3 RCA -58, 2 RCA -46, 1 RCA -82, Total 10 Undistorted Output7.0 Watts Type of MicrophoneCarbon Two Button Type of Phonograph MotorInduction Running at Synchronous Speed Diameter of Tur

2、ntable12 Inches Turntable Speed33X and 78R. P. M. Type of Speed ReducerBall Bearing Giving Very Smooth Operation Type of Pickup and Tone ArmLow Impedance Pickup with Inertia Type Tone Arm INTERNAL CONNECTION! OFOUTPUTTRANSFORMER DROWN RED TO DaEcovn GREEN -A -Loudspeaker Wirine RCA VICTOR DIVISION O

3、F RADIO CORPORATIONOFAMERICA, CAMDEN N.J., U. S. A 收音机爱 好者资料库 RadioFans.CN CI 4-30 444440. CI 111-325 I.E PAWL. MIAFD.RCA 56 ALL 111101.1110.5 70 FRAME MI0 630 19 NI RCA 5.-f00 114 cif woo loonDi, 1.5 500004 .Y.* 4N7 150000- LIS pi LI AlOTL11- - 2300- 99. /I C79 2960, /.300-T: NIFD SAKI FIELD 1.-.20

4、 6500 22 140220 MNFIL ;LT L11 c: r=. g C- 24 .141714 R16R19 IMEG.200 C23C25 15-7.52400 R24PAINFII 100004. 1104413 I 12 C 4 5 6Ti 112(L13 / V.AtA,6PLis,2742474r0i T3 1.WD 521 .51.410. i ca 1 1111 R15 I. .I PWR.APAPLS. RCA 46 2300- C282151115 NNED. C32 1125c30 E0000.1.02 WO. fl Change in Wiring of Con

5、sole Models C e31 1 74 iO FILAMENTS TO AV C. NEATER R 74, R 76 8 R 77 Schematic Circuit Diagram 2400 C53 MAI ED. 收音机爱 好者资料库 RadioFans.CN Cl r 335 RS. AMPL. MIMED I RCA S6 AL MOUNDS 10 IRAK 4! EXT. GROUND CONNECTION in( 500000. L2 051.D. UNIT 800000. R3 S00000. RS 100000. T-1 116 157 RECT. RCA 112 10

6、 C3C4 4-504-30 MMFD.MMFD. CS 1 r32S 1L* OCT ssso.RCA 38 L4.I V_1a n1 fP :0100000. 4000. R4 100000 CIOCII 13-7.5630 MF,F0. MMFD. 0 RCA SI 02 1RIOR Zitt 6000. MED.112.325CM. MMFD. MVO. CT .5Mf0. 4500. C35 10.MII) 4.4.al II I 616., TO ALL WATERS EXCEPT AMC. swig. man. nt. TO PWR.AMPL. CS FILAMENTS TO A

7、V. C. HEATER 9RC8 120.1 INFO 1 LI AtroW 2300 LIS , C39 5900,.I FD. SI4C11FIELD- CM 140 -220 CIS MMFD. 15-75LE MASI. MNCD.IRCA 58 Rte. 813 100000, 813 CIS 3.10. 630A.V. C. Le TO. RCA 56 0 4 R14 0000 SNITOI FMME kCIS jo0p0 R50000 r Alf 11 1 20 2400 WE C 22 140430 I MINA LIO111 3 141410. C25028.215. 10

8、5 105.275 I 24002MICI MAIM. C52 atLorri 1U.A.EAMPLI24n 111. RCA 56 I LEO RCA 36 T2.4T C24C INFO.6MF26D Rte LMEG.20 5 LIND 2306 IIII II 1,14R4= io,iit.t 4142266187 54321 C40 37S MINS 3:441 400001.02M/D.II22 C30 40061,4. I x-27 20a 7 CS, MAGNETIC picnic - MOTOR -Schematic Diagram of RE -81 P WR AMPLS.

9、 RCA 46 2400 C33 MMFD. R24 10000, T4 8 FA 440 4.4.11001410NE us Ni 8 -ES 15A Position of Selector Switch-Top to Bottom 1 Radio 2 Radio Recording 3 Record 4 Home Recording 收音机爱 好者资料库 RadioFans.CN PAGE 203-A R74, R76, R77 & RE 81 Alignment Procedure STEP CONNECT HIGH SIDE OF TEST OSC. TO - TUNE TEST O

10、SC TO - TURN RADIO DIAL TO ADJUST THE FOLLOWING FOR MAX. OUTPUT 1 I -F Grid in series with .01 mfd 175 kc Quiet Point near 80 S & P of 2nd I -F Trans. 2 1st Det.Grid In series with .01 mfd S & P of 1st I -F Trans. 3 Antenna in series with 200 mmfd 1400kc11 Osc.,Det. and R -F Trimmers (1400 kc Trimme

11、rs) 4600 kcnear 80 600 kc Oscilla - tor Trimmer (Rock Gang) 5Repeat Step, 3 T-1 CX IREN 4.4k -RE & MTN- INTERNAL CONNECTIONS OF POWER TRANSFORMER INTERNAL CONNECTIONS OF DITERSTAGE TRANSFORMER RADIOTRON SOCKET VOLTAGES 120 Volt A. C. Line (No Signal Being Received -Antenna Lead Grounded to Chassis)

12、Radiotron No. Cathode t Heater Volts, D. C. Cathode or Filament to Control Grid Volts, D. C. Cathode or Filament to Screen Grid Volts, D. C. Cathode or Filament to Plate volts, D. C. Plate Current, M. A. VOLUME CONTROL AT MINIMUM 1. R. F.+41.090280 2.1st Det.01.2902750 3.Osc.+40-555.0 4.I. F.+31.890

13、2800 5.A. V. C.00-50 6. 2nd Det.+153.0-2251.0 7.1st A. F.+1410.0-2605.0 8.Power-0-4006.0 9.Power-0- 4006.0 VOLUME CONTROLAT MAXIMUM 1.R. F.+40702504.5 2.1st Det.+60.6752352.0 3.Osc.+40-505.0 4.I. F.+41.5842504.5 5.A. V. C.00-150 6.2nd Det.+153.0-2101.0 7.1st A. F.+1410.0-2405.0 8.Power-0-4006.0 9.Po

14、wer-0-4006.0 1.-10 40.fapq INTERNAL CONNECTIONS OF 2mo I.F. TRANSFORMER INTERNAL CONNECTIONS OF tel I.F. TRANSFORMER RESISTOR BOARD CONNECTIONS I M.8441V - C -SS 34 I M.D.Ikal it- W XL as -MTh ICIIIVERW INTERNAL CONNECTIONS OF CAPACITOR PACK PAGE 204-A R74, R76, R77 &RE81 SPLICE MAGNETIC PICKUP PHON

15、OGRAPH MOTOR BLACK VOLUME mw CONTROL I. C. INPUT PLUG BLACK AUTOMATIC SWITCH YELLOW YELLOW 7 2000 CONE COIL SELECTOR SWITCH 5000 It R-30- 20000011 COMPARTMENT LAMP RECORDING - - VOLUME INDICATOR RECEIVER ASSEMBLY YELLOW REPRODUCER ASSEMBLY BLACK BLUE -4. BROWN YELLOW GREEN RED RACK -RED TL RED GREEN

16、 YEJIOW RED YELLOW RED -YELLOW TR RED BLACK BLUE YELLOW & RED YELLOW&GREEN YEOW BLACK It RED RACK & GREEN 2.0A- 2 2.3A- 3 SPLICE - BLACK-RED TEL R -28 ., 15 II YELLOW C RED BLACK I RED GREEN 1. YELLOW RED MICROPHONE MICROPHONE CABLE -BROWN WITH RED TR. RED WITS Yi LOW C-41 .08 MED. t_n 11011 Assembl

17、y Wiring Diagram of RE -81 INPUT TRANSFORMER PAGE 20S -A R74- R76, R 7 7 & R E 81 REPLACEMENT PARTSI Insist on genuine factory tested parts, which are readily identified and may be purchased from authorized dealers Stock No. DESCRIPTION Stock No. DESCRIPTION RECEIVER ASSEMBLIES 6322Volume control-Co

18、mplete with mount- ing nut 2725Fuse - 1.5 Ampere - Cartridge type fuse-Package of 5 6323Shaft-Tuning condenser drive shaft with one flat washer and two C 2731Resistor -10,000 ohms-Carbon typewashers-Package of 2 resistor 1 watt-Package of 5 6324Tone control-Complete with mount - 2734Capacitor - 745

19、mmfd. capacitor - ing nut-For R-74 only 2746 Package of 5.R 7.4. ONLY. , . Socket-Dial lamp socket 7054Cord-Power cord 2747Cap-Contact cap-Package of 5 7062 Capacitor-Adjustable tuning capacitor 2749Capacitor -2,400 mmfd. capacitor -15 to 70 mmfd. 3048Resistor -500,000 ohms-Carbon type 7439 Drum-Dia

20、l drum with set screws and -q watt-Package of 5 3 dial mounting nuts 3055Cushion-Sponge rubber chassis cushion 7440Scale-Dial and dial scale support-One set of 47484 Socket-UY type Radiotron socket -6 3056Shield-Radiotron tube shield-Pack-used age of 27485Socket -6 contact socket -4 used 3076Resisto

21、r -1 megohm-Carbon type- y watt-Package of 5 74.87 Shield-Radiotron tube shield -6 used -Plain finish 3077 3099 Resistor -30,000 ohms-Carbon type- Y) watt-Package of 5 Capacitor-.005 mfd. capacitor 7488 Shield -Tube shield top -1 used-Plain finish 3252 3358 Resistor -100,000 ohms-Carbon type resisto

22、r -34 watt-Package of 5 Resistor -3,000 ohms-Carbon type- 7501 Capacitor -3 gang variable tuning ca - pacitorcompletewithmounting screws and washers watt-Package of 5 7504 Coil-Detector and oscillator coil corn - 3359Resistor -120 ohms-Flexible wire type plete with mounting bracket -Package of 5 751

23、0 Shield-Radiotron tube shield -6 used 3360Resistor -150,000 ohms-Carbon type -Maroon finish -q watt-Package of 5 7511 Shield-Radiotron shield top -1 used - 3368Socket-UX type Radiotron socket Maroon finish 3369Resistor -4,500 ohms-Porcelain type 7512 Reactor-Detector plate reactor 3370 -20 watt Cap

24、acitor -0.02 mfd. capacitor 7513Capacitor pack-Comprising five 0.1 mfd., three 0.5 mfd., one 7. mfd., four 3372Cover-Fuse cover 10. mfd., one 0.3 mfd., and one 1. mfd. 3373Board-Terminal board -1 terminal and insulator 7514 capacitor in metal container Transformer -1st intermediate frequen- 3374 337

25、5 3376 Reactor-A. V. C. Filter reactor Reactor-Tone compensating reactor- For R-74 onl mounting boardMounting board-Fuse complete with mounting screws and 7515 7516 cy transformer Transformer -2ndintermediate fre- quency transformer Board-Resistor board-Less resistors and capacitors lockwashers-Less

26、 fuse 7517Shield-Metal shield-Located under 3377Coil-Choke coil power transformer and Radiotron 3378Capacitor -375 mmfd. capacitor-For RCA -82 R-76 and R-77-Package of 5 7518Reactor-Filter reactor 6142Resistor -6,000 ohms-Carbon type- 7519Transformer-Audio input transformer. y4 watt-Package of 5 752

27、1Reactor-Tone compensating reactor - 6186Reaistor-500,000 ohms-Carbon type For R-76 and R-77 -X watt 7522Tone control-Complete with mounting 6188Resistor -2 megohm-Carbon type- nut-For R-76 and R-77 6192 3% watt-Package of 5 Spring -3tuning capacitor drive 8932Transformer-Power transformer 105- 125

28、volts -50-60 cycles gang cord tension spring-Package of 10. 8933 Transformer-Power transformer -105 6250Resiator-4,000 ohms-Carbon type- -125 volts -25-50 cycles ,/xtt-Package of 5 8934Transformer-Power transformer -200 6277Capacitor - 0.1 mfd. capacitor - Lo- -250 volts -50-60 cycles Bated on metal

29、 shield 9034Transformer-Power transformer step - 6282Resistor -60,000 ohms-Carbon type-down -220-110 volts 34 watt-Package of 5 3384Capacitor -630 mmfd. oscillator series REPRODUCER ASSEMBLIES capacitor-Package of 53005Screw assembly-Comprising 4 screws, 6288Knob-Station selector-Volume con- trol or

30、 tone control knob-Package 8 nuts, 4 washers, and 4 eyelets- Package of 1 set-For R-74 of 5 3237Screw Assembly-Comprising 4 screws, 6298Cord -3 gang tuning capacitor drive cord-Package of 5 8 nuts, 4 washers, and 4 eyelets- Package of 1 set-For R-76 and R-77. 6302Bracket -Dial lamp bracket and indic

31、a- tor-Package of 2 6184 6325 Board-Terminal board with 3 terminals. Transformer-Output transformer 6303Resistor -20,000 ohms-Carbon type- 6334 Transformer-Output transformer RE81 ,.4 watt-Package of 5 8920Ring-Cone retaining ring 6308Coil-R. F. coil complete with mount- ing bracket 8935Cone - Repro

32、ducer cone complete - Package of S 6315 9420Coil assembly-Comprising fieldcoil, cone bracket and magnet Resistor -45,000 ohms-Carbon type watt-Package of 5 6317Capacitor -0.05 mfd.-Capacitor PAGE 206-A R74, R76, R77 8, RE81 REPLACEMENT PARTS (Continued) Stock No. DESCRIPTION Stock No. DESCRIPTION 27

33、79 2947 3021 3116 3322 3391 3392 3393 3394 3395 3396 3400 3430 6288 6337 6338 6339 7529 7531 10174 10184 3216 3385 3386 3387 3388 3380 3390 3397 MOTOR BOARD ASSEMBLIES Pointer-Selector switch pointer-Pack- age of 10 Leather-Friction lea ther-Packageof20 Resistor -5,000 ohms-Carbon type- watt-Package

34、 of 5 Resistor -200,000 ohms-Carbon type watt-Package of 5 Switch-Automatic brake switch with mounting screws Suspension spring and washer assembly for motor board-Comprising 1 bolt, 1 top spring, 1 bottom spring, 1 C washer, 2 cup washers and 1 nut Spacer-Volume control spacer block. Spacer-Selecto

35、r control switch spacer block Socket-Socket and base assembly- Less shade-For compartment lamp. Shade-Compartment lamp shade Receptacle - Needle receptacle with mounting screws Resistor -30 ohms-Carbon type-u watt-Package of 5 Box-Needle box with lid-Package of 2 Knob-Selector switch or volume con-

36、trol knob-Package of 5 Volume control-Complete with mount- ing nut Switch-Selector control switch com- plete-Less knob Escutcheon-Selector switch escutcheon Transformer pack-Comprising phono- graph input transformer, reactor and capacitor assembly Cable-Selectorswitch, volume control, terminal strip

37、, volume indicator meter phonograph input transformer and reproducer output transformer con- necting cable Springs-Automaticbrakesprings- One set of 4 springs-Package of 2 sets. Plate-Automatic brake latch trip plate with mounting screws-Package of 5. PICKUP, PICKUP ARM, MICROPHONE AND VOLUME INDICA

38、TOR ASSEMBLIES Cushion-Microphone rubber cushions -Package of 6 Coil-Pickup coil Cover-Pickup cover Screw assembly - Pickup mounting screw assembly comprising one screw, one nut and one washer-Package of 10 Screw-Pickup needle holding screw- Package of 10 Rod-Automatic brake trip rod with lock nut-P

39、ackage of 5 Escutcheon-Pickup armescutcheon complete with mounting rivets Resistor -15 ohm-Flat type-Volume indicator meter series resistor 3417 3418 3419 6335 6336 6346 6460 7530 7532 7533 7534 3338 3340 3341 3342 3343 3344 3346 3347 3399 7084 R948 3261 3398 8939 8940 8941 8942 8943 8944 8945 8946

40、8947 2776 6294 Armature-Pickup armature Cushions-Pickup rubber cushions- Comprising one damper and two spacercushionsandone damper bushing-Package of 5 sets Screw-Pickup cover mounting screw- Package of 10 Pickup-Pickup unit complete Weight-Home recording weight Back-Pickup housing back Housing-Micr

41、ophone housing Arm - Pickup arm completeless escutcheon, pickup, pickup mounting screw, nut and washer Meter-Home recording volume indi- cator meter Mechanism - Microphone mechanism less housing Cord-Microphone cord TURNTABLE ASSEMBLIES Ring-Clamp ring assembly-Compris- ing spring, latch lever and s

42、tud Washer-Thrust washer-Package of 2 Pin-Groove-Pin-Package of 2 Spring - Latch spring - Located on clamping ring-Package of 2 Sleeve-Sleeve complete with ball race Cover-Grease retainer cover-Pack- age of 2 Bushing-Speed shifter lever bushing- Package of 4 SpringSpeed shifterlever spring- Package

43、of 2 Lever-Speed shifter lever with mount- ing screws Cover-Suede cover for turntable Turntable-Complete MOTOR ASSEMBLIES Bushing-Rubber bushing used on turn- table spindle for long-playing Rec- ords-Package of 5 Motor mounting washer assembly- Comprising 2 cup washers, 4 springs and 1 C washer-Pack

44、age of 1 set. Motor-Motor complete 105-125 volts -60 cycle Motor-Motor complete 105-125 volts -50 cycle Motor-Motor complete 105-125 volts -25 cycle Rotor and shaft for 105-125 volts, 60 cycle motor Rotor and shaft for 105-125 volts, 50 cycle motor Rotor and shaft for 105-125 volts, 25 cycle motor S

45、pindle-Turntable spindle with fibre gear for 60 cycle motor Spindle-Turntable spindle with fibre gear for 50 cycle motor Spindle-Turntable spindle with fibre gear for 25 cycle motor CABINET ASSEMBLIES-R-77 (Prices furnished upon request) Catch-Door catch and strike with nail -Package of 2 sets Hinge -Door hinges -1 set of 4 hinges with mounting screws