RCA-Victor-Co-Inc-85BK 电路原理图.pdf

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1、PAGE 319-B MODELS 85BK 8. 85BT Five -Tube, Three -Band, Battery Operated, Superheterodyne Receivers CII OSC. RNTC.7 RI 20,000 RC6000/5.C. 470 MPAR 470000s. v C. BATT. OUTPUT 4 C/PiVE /z a.oe Rvc It CH OSCCIS 05C. L10 OSC. * *p rma.6.10ve00KC .orour eOoKCo. le 10 W.1I5. Cor., LIZ SEC. RCLI. 45,015C.

2、TO L I 4 StC ROJ. 4G,OK.C. SN-719 -Radiotron, Coil, and Trimmer Locations Model 85BT Electrical Specifications FREQUENCY RANGES Standard Broadcast (A)530-1,720 kc Medium Wave (B)2,100-6,800 kc Short Wave (C)6,800-22,000 kc Intermediate Frequency RADIOTRON COMPLEMENT (1) RCA -1C6First Detector-Oscill

3、ator RCA -1A4Intermediate Amplifier Pilot Lamps (2) BATTERIES REQUIRED Model 85BK R -F ALIGNMENT FREQUENCIES Short Wave (C) 20,000 kc (osc.) Medium Wave (B)6,000 kc (osc., ant.) Standard Broadcast (A). 600 kc (osc.), 1,500 kc (osc.) 460 kc (3) RCA -1F6Second Det., A -F Amp., and A.V.C. (4) RCA -30Au

4、dio Driver (5) RCA -19Push -Pull Power Output Mazda 2.0 volts, .06 ampere A, one plug-in, 21/2 -volt Air Cell, or one 2 -volt storage battery; B, three 45 -volt, heavy-duty, plug-in type B batteries; C, one 71/2 -volt C battery tapped at -11/2, -3, and -41/2 CURRENT CONSUMPTION A at 2 volts (pilot l

5、amps off) 0.56 ampere A at 2 volts (pilot lamps on) 0.68 ampere B at 135 volts 19 milliamperes Fuse Rating 1/2 ampere POWER OUTPUT Undistorted 1.2 watts Maximum 2.2 watts Bias Cells.-Three bias cells are used only for the purpose ofsupplyingbiaspotential tothe106first -detector - oscillatortube.Thes

6、ecells shouldneverbemeasured with an ordinary voltmeter or other device which draws any current.A simple check on these cells may be made by connecting a milliammeter inthe platecircuit of the 106 tube andnotingtheplatecurrent reading.Then carefully remove the cells and substitute a battery potentia

7、l of 2.7 volts in their place and note the new reading on the milliammeter.If the first reading obtained (with bias cells) is more than 40% from the latter reading (with 2.7 -volt battery), the bias cells should be replaced. This 40% dif- ferenceisequivalent toa change of approximately 25% battery v

8、oltage. Operation With CV -8 Pak-O-Powr.-These receivers may readily be operated from anRCA CV -8 Pak-O-Powr, in which case,asix -volt storage battery replaces the A and B batterieslistedunderBatteriesrequired. When using the CV -8, one cell (2 volts) of the storage battery supplies filament voltage

9、tothetubes,while the other two cells (4 volts)supplies power for the CV -8. When installing, the seven prong CV -8 receptacle plugs into the seven prong volts, and three bias cells (Stock No. 12681). LOUDSPEAKER Type Permanent -Magnet Dynamic Voice Coil Impedance2.2 ohms at 400 cycles plug on the re

10、ar apron of the receiver chassis and the four battery leadsclip on terminals of the storage battery as follows: Red tot 6 V.; Blue to + 4 V.; Yellow to + 4 V.; and brown (fused lead) to -V. The two four -volt leads (Blue and Yellow)should make separateconnections to the same battery strap to avoid v

11、ibrator buzz which might otherwise resultifthese two leads are joined together or touch each other.Observe extreme care that proper con- nections are made to the battery, as a wrong connection will burn out the tubes.The green lead (originally connected to - 3 v. on the C battery) should be shifted

12、to the - 4.5 volttap.TheotherCbatteryconnectionsremain unchanged. The following changes underElectricalspecifications become effective when employing the CV -8; A battery currentdrainat6volts,1.65amperes.Fuserating,5 amperes.Undistorted output, 1.3 watts.Maximum output, 1.8watts.Under Service data,

13、the following voltages apply to the RCA -19 power -output tube.Either plate to chassis,180volts.Eithergrid tochassis, - 41/2volts. Plate current (either plate), 1.6 ma. When servicing,the CV -8chassis should be insulated from the receiver chassis to avoid vibrator buzz. RCA VICTOR DIVISION OF RADIO

14、CORPORATION OF AMERICA, CAMDEN N. J., U. S. A. 收音机爱 好者资料库 RadioFans.CN GO OR RANGE SELECTOR SHOWN IN -C- BAND POSIT ON. FOR -13SANDS ROTATE KNOB COUNTER CLOCKWISE LI 1.94555 MME _LL7MMF C4C7 -490 MMFT C5 170 MME 3-20 vonAB 470.000E 1ST 0E7_ OSC. LIE BeNINIE C FOI 1-490 C. MIME 30 MEAF 52 -SO WAR - t

15、iCI5 5-_SQ MN, IIIMOVABLE SEGMENTS (ROTOR) 1.9 MP - TT R2 56E0001 ID 0.1 I V SWITCH PROGRESSES IN THIS DIRECTION 03R4 AMP,MAW 1200A3300A. ANT COIL CONNECTIONS L.2 1M1id 21 ( 21- 110MF LET IR4 -2.7V R5 22002. LINE CLOSED FOR RADIO LIT L14 R7 2.2 MEG. 23 21-1090 ROIL 2.DET RVC AE- IF6 E 120 2, RD 22 0

16、00 E29 180 AWE 02549 0025T RDvOLUME 2MEG CONTROL RB 220000 C281 0.11450I 0035 MED DRIVER 50 CEO ,20 OP1 NAME RII 270 000 RIO IMEG. CI9 151AF-13. OSCCOIL CONNECTIONS -Schematic Circuit Diagram PRI AMAMI CEI M POT TOR TOP 1. I.F. TRANSF CONNECTIONS RGC22 EEE004 11201.4r DOI FU3L.6 2/02102).l In yOP Ro

17、y TORE rLFTRANSF. CONNECTIONS 7.5V 531 OUTPUT TI 19 T2 Efe 130 n)10F25 OE RE WHEN PAR -0 PoNR- IS USED CONNECT THIS LEAD TO -At VOLT TERMINAL 0.43E USED ONLY FOR- +26. RIR CELL OPERRTION GA, C3E BMFD. 6300 -01 33 0025 C3I .035 MED. FUNCTIONS IN CIRCUIT ONLv WREN PAR -0 PORK IS USED RI 2.2A -DIAL LRA

18、APS DIAL LAMP 53 J SWITCH (ON RANGE SELECTOR SHAFT) POWERMOUNTED ON SWITCHSAME SHAFT pow ER PLUG CONNECTIONS 7 05 RMP FUSE F I +452-900. BRTT. eL AEAYILLOR ! ,r PL- , Aryto, or YE ELIRE.1.1 411 93. BRTT. facmiTVIEW Of OAT TIE KY PLUG 1 BATTERY CONNECTIONS A FOR AIR CELL ORE RTIOni iNSHAT0-03 4,65 TE

19、A (R 11 foSE. OESWITH PoSlrivE (RA. F I35V 3-00186-0 TONE CONTROL SWiTIN 6 3 DRIVER TRANS. CONNECTIONS -YELLOW TI BLVE- 3740 - GREEN -Rao 2,)0. 3144 LUE-ELL UTE - SLUE - AL E - 0 IA n. REOALRE If - OUTPUT TRANS. CONNECTIONS TREBLE BASS CO Ul T CJ 90 co co 收音机爱 好者资料库 RadioFans.CN PAGE 321-B 85BK - 1S

20、T DET.- i 07.1.1 C.G. 0062V -,1,_ L _ _ - 135V - Z wad-rLL13 AC/J 4130 K.C. 2N I.F. TRANS. C.G OSC. COI L 2 DET, A.F. C._ 1 F6-I 2V. (ap v.) 0V. 35V.925V. t29V.it ANT. COIL DRIVER 302V.7 133V. ttt 1 BOTTOM VIEW- REAR OF CHASSIS PLATE CURRENT N* -11.0 Ma. N.1 OP 311T1A. N.24.1 Ma. No4 3.5MB. 14S RORP

21、f_. 1.2 ma. OUTPUT 19 r- SP- n-Sar I134V. -Radiotron Socket Voltages, Coil, and Trimmer Locations Measured with all batteries at normal voltage-Tuned to approximately 1,000 kc- No signal being received-Volume control minimum *CAUTION: Do not attempt to measure voltage on control grid of the 106 with

22、 any conventional voltmeter due to presence of bias cells. Note: Two voltage values are shown for some read- ings.The higher value shown in parenthesis with as- terisk(*)indicates operating conditions without volt- meter loading. Alignment Procedure Calibrate the tuning dial by adjusting main dial p

23、ointer to the low -frequency (end) calibration mark on dial with the gangtuning -condenserplatesinfull -meshposition;then adjustthesmall(vernier)pointertoO.Theseare friction adjustments. M- 81 8 1G-0 Order of Alignment Test Oscillator Receiver Dial Setting Circuit to Adjust Adjustment Symbols Adjust

24、 to Obtain Connection to Receiver Dummy Antenna Frequency Setting 1 1A4 I -F Grid Cap .001 Mfd.460 kc No Signal 550-750 kc 2nd I -F Trans. L13 & L14Max. (peak) 2 106 Det. Grid Cap .001 Mfd.461 kc No Signal 550-750 kc 1st I -F Trans. L11 & L12Max. (peak) 3Ant. Term.300 Ohms20,000 kc20,000 kcC Osc.CII

25、Max. (peak)*$ 4Ant. Term.300 Ohms6,000 kc6,000 kcB Osc.C14Max. (peak)* 5Ant. Term.300 Ohms6,000 kc6,000kcB Ant.C6Max. (peak) 6Ant. Term.200 Mmfd.600 kc600 kcA L -F Osc.L10Max. (peak) 7Ant. Term.200 Mmfd.1,500 kc1,500 kcA H -F Osc.CISMax. (peak) 8Ant. Term.200 Mmfd.600 kcRock tk ru 600 kd A L -F O.KL

26、10Max. (peak) 9Ant. Term.200 Mmfd.1,500 kcRock thrti 1,500 kc A H -F Oac.C15Max. (peak) * Use minimum capacity peak if two peaks can be obtained. After this adjustment, check for image signal by shifting receiver dial to 19,080 kc. 收音机爱 好者资料库 RadioFans.CN PAGE 32-2_-B 85BK & 85BT Precautionary Lead

27、Dress. -(1) Twisted leads fromfila- ment switch to power plug must be dressed against bottom of end shield and fastened with tape.(2) Keep leads of C18 as short as possible.(3) Lead from Ll to C5 -C6 should be 31/4 inches long.(4) Lead from L1 -L2 to range switch should be15/8inches long.(5)Keep lea

28、d from range switchto C10 -C11asshortaspossible.(6)Keep lead from range switch to L6 as short as possible.(7) Yellow lead from 2ndtransformer to phonograph terminal board must he dressed away from other wiring. REPLACEMENT PARTS nsist on genuine Factory tested parts,which are readily identified and

29、may be purchased from authorized dealers. STOCK DESCRIPTION CKSTN DESCRIPTION RECEIVER ASSEMBLIES 5029Resistor -58,000 ohms, carbon type,* watt (R2) 14388Belt -Variable condenser drive belt 11398Resistor -220,000 ohms. carbon type,1/10. watt (R8) 13216 Board -Antenna and ground terminal board 11453R

30、esistor -270,000 ohms, carbon type, 1/10 watt (R11) 12717 14338 Board -Phonograph terminal board Bushing -Variable condensermounting bushingand 11452 12200 Resistor -470,000 ohms, carbon type, 1/10 watt (R1) Resistor -1 megohm, insulated,* watt (R12) screw assembly 13730Resistor -1 megohm, carbon ty

31、pe, * watt (R10) 12607 12581 Cap -First I.F. transformer shield top Cap -Second I.F. transformer shield top 12679 14406 Resistor -2.2 megohrn, insulated, * watt (R7) Resistor -2.2 ohms, flexible type,3 watts (R13) 12118Cap -Grid contact cap 14350Screw -No. 8-32x3/16 square head set screw for gear 14

32、383 Capacitor -Adjustable dual trimmer (C14, C15) Stock No. 30085 and drum Stock No. 14345 14392Capacitor -4.7 Mmfd. (C3, C4) 14374Shield -Antenna coil shield 12829Capacitor -56 Mrnfd. (C21) 13311Shield -Chassis end shieldand rubber mounting foot 12813Capacitor -82 Mmfd. (C12) assembly 14262Capacito

33、r -110 Mmfd. (C20) 12008Shield-I.F, transformer shield 12404Capacitor -120 Mmfd. (C22, C23) 14375Shield -Oscillator coil shield 12724Capacitor -120 Mmfd. (C26) 3682Shield-Radiotron shield 12406Capacitor -40 Mmfd. (C24) 14171Socket -Dial lamp socket 13052Capacitor -470 Mmfd. (C7) 4794Socket -4 -conta

34、ct 1A4 or 30 Radiotron socket 12727Capacitor -555 Mmfd. (C6) 4788Socket -6 -contact 106, 1F6 or 19 Radiotron socket 14407Capacitor -2,800 Mmfd. (C13) 12007Spring -Retaining spring for core Stock No. 12008 12728Capacitor -4,600 Mmfd. (C18) 12907Spring -Tension springforindicator drivegearStock 6107Ca

35、pacitor -.0025 Mfd. (C26, C30, C33) No. 30086 6005Capacitor -.0035 Mfd. (C27) 14342Spring -Tension spring for idler Stock No. 14341 13138Capacitor -.01 Mfd. (C17) 14402Switch -Range switch(S1, S2) 5196Capacitor -.035 Mfd. (C31) 14401Switch -Tone control switch and power switch (S3, S4, 4841Capacitor

36、 -0.1 Mfd. (C2, C8, C28, C29) S5, S6) 4840Capacitor -0.26 Mfd. (C9) 12803Transformer -Audio transformer pack (Ti, T2) 5170Capacitor -0.25 Mfd. (C26, C30, C33) 14261Transformer -FirstI.F.transformer(L11,L12,C20, 14403Capacitor Pack -Comprising two sections each8Mfd. C21) (C19, C32) 14283Transformer -

37、Second I.F. transformer (L13, L14, C22, 12681Cell -Bias cell C23, C24, R8, R8) 14372Coil -Antenna coil and shield (L1, L2, L3, L4) 14400Volume Control (R9) 14373 Coil -Oscillator coil and shield (L5, L8, L7, L8, L9, L10) 14379Washer -Felt washer for indicator pointer REPRODUCER ASSEMBLIES (RL-73-1)

38、14397Condenser -2 -gangvariable condenser(C5,C8,C10,12642Cone -Reproducer cone and dust cap (L15) C11)5118Plug -3 -contact male connector for reproducer 5119 12800 Connector -3 -contactfemaleconnector forreproducer cable Core -Adjustable core and stud assembly forcoil Stock 9712Reproducer complete M

39、ISCELLANEOUS ASSEMBLIES No. 14373 4289Body -Fuse holder female body 12006Core -Adjustable core and stud for I.F. transformer 4288Bushing -Fuse holder bushing and ferrule 14399Dial -Station selector dial scale 14408Cable -Battery cable complete with fuse, fuse holder, one 14398 Drive -Variable conden

40、ser vernier drive pinion gear and shaft 7 -contact female connector, three 2 -contact male con - nectors and two battery clips 14346 Drum -Variable condenser drive belt drum complete with 4288Cap -Fuse holder male cap set screws 14289Clip -Battery clips, one marked + and one unmarked 30085Gear -Indi

41、cator drive gear and hub assembly and pointer 12827Connector -2 -contact male connector for battery cable stem and gear assembly 14409Connector -7 -contact connector for battery cable 14405Holder -Bias cell holder 14398Escutcheon -Station selector escutcheon and crystal 14941Idler -Station selector

42、drive beltidler 3748Fuse- ampere (F1) 14344Indicator -Station selector indicator pointer 4290Insulator -Fuse holder insulating sleeve 14382Indicator -Vernier indicator pointer 14359Knob -Station selector knob 4348Lamp -Dial lamp 14269Knob -Volume control, tone control or range switch knob 14404Plug

43、-7 -contactmaleplug locatedonrearapronof chassis for battery cable 14410Resistor -0.43 ohms, flexibleresistor,* watt complete with clip (R14) 14340Pulley -Station selector drive belt pulley and knob shaft 11210Screw -Chassis mounting screw and washer assembly - 14361Reflector -Dial reflector and lam

44、p bracket assembly for Model 85BK 14343Retainer -Drive shaft and pulley retainer -holds tuning knob shaft and pulley on range switch shaft 11377Screw -Chassis mounting screw and washer asaembly- for Model 85BT 11283Resistor -1,200 ohms, carbon type,iwatt (R3) 4284Spring -Fuse holder tension sprin 13

45、737Resistor -3,300 ohms, carbon type,*watt (R4) 4982Spring -Retaining spring for knob Stock No. 14359 14284Resistor -22,000 ohms, carbon type, 1/10 watt (R6) 14270Spring -Retaining spring for knob Stock No. 14269 11305Resistor -22,000 ohms, insulated, * watt (R5) 4285Washer -Fuse holder insulating washer