RCA-Victor-Co-Inc-86T6 电路原理图.pdf

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1、1-A-7_,T 564-C MODEL 8676 Six -Tube, Electric -Tuning, Three -Band, A -C, Superheterodyne Receiver Electrical Specifications FREQUENCY UENCY RANGES Standard Broadcast (A) ,40.1,7_0 kc Medium Wave (B) _,300.7,000 kc Short Wave (C) 7,000-22,000 kc Six Electric Tuning Position: 540.1,550 kc Intermediat

2、e Frequency RADIOTRON COMPLEMENT (1) RCA-6A8G First Detector and Oscillator (22) RCA -6K7 I -F Amplifier (3) RCA -6H6 Second Detector and A.V.0 Pilot Lamps (2) R -F :ALIGNMENT FREQUENCIES Medium Wave (B) 6,000 kc (ose., ant.) Short Wave (C) 20,000 kc (osc.) Standard Broadcast (A). 600 kc (ose ), 1,5

3、00 kc (osc.) Six Electric Tuning Positions. Desired Station (ose., ant.) 455 kc (4) RCA -6F5 Audio Voltage Amplifier (5) RCA -6F6 Audio Power Amplifier (6) RCA -5W4 Full -Wave Rectifier Mazda No. 46, 6.3 volts, 0.25 amp. POVER SUPPLY RATINGS Rating A-105-125 volts, 50.60 cycles 75 watts Rating B-105

4、.125 volts, 25.60 cycles 75 watts Rating C-100.130/200.250 volts, 50-60 cycles 75 watts Lo uns PEA K ER Type 6 -inch Electrodynamic Voice coil impedance at 400 cycles 2.5 ohms -84091-1 4.7 ohms -84091-2 POWER OUTPUT Undistorted 2.2 watts Maximum 4.5 watts 4 I 350V. A.C. I REGT., 350V. A.C. 5V. : a 3

5、36V. rp A.C. J 240V.1 I swa / o 6.4V.r A.C. / suv r(al:J i J 250V. F t ( 3.6V.)+ -16.4V. I -0.1V. 1 186V. ELECT. CAP. I I I 6.4V 1 3.6V1-C2s I (+) I r A C.1 I 1 O -r r250V.- I IL 35V, I I I t_ _I 250V. I C.D. ne Q J L IOOV. -J I 336V. I5T D ET. osc. 6A8 -G I C26 rBROWN I ELECT.CAP RED fCl2/ - CATHOD

6、E CURRENTS ELECT.cA , RCA-6AB-G _. . 125MA 1B6V. C12,C26 BLACK 2 RCA -6K7 ._ l.2MA. r, RCA -6H6 ._. . I Q - L. RCA -6F5 ._._ . _. 0.27MA I r P C.G. i RCA -6F6 3B.5MA. I( 114V.) OC -3.6V. 6 RCA -5W4 . SBMA.+ I I_ - CANNAOT BE MEASURED 70t = I - i(-1.3V)I 6.3V. T 1 I IAUDIO 1_ 64. ;0.2V.1 A C -3.6V. I

7、 I f 6F5 A.C. + -; J Measured (-16.4V!) -0.5V. OUTPUT 6F6 BOTTOM VIEW -REAR OF CHASSIS 2.o DET. Q A.V.C. 6H 1 I (0.3V.)1 -0.1V. I Is I.F.TRANS. LIO PRI ADJ. 455 KC A 6.4V. A.C. J 250V.- -100V. PRI. er f ADJ. 455 KC F.TRANS. 8676 RCA MFG.CO.INC. SN- 801-0 1-kadioPron Socket Voltages and Trimmer Locat

8、imis at 117 volts, 60 -cycle supply -Tuned to approximately 1,000 kc (Standard Broadcast) - No signal being received -Volume control minimum -Tone control optional Note: Two voltage values are shown for some read- ings. The value shown in parentheses with asterisk (S) indicates operating conditions

9、without voltmeter loading. The other value (generally lower) is the actual measured voltage and differs from the value shown in parentheses because of the additional loading of the voltmeter through the high series circuit resistance. Voltage values as specified should hold within 20% when the recei

10、ver is normally operative at its rated line voltage. To duplicate the conditions under which the voltages were measured requires a 1,000 -ohm -per -volt d -c meter, having ranges of 10, 50, 250, and 500 volts. Use the nearest range above the specified measured voltage. Asc voltages were measured wit

11、h a corresponding a -c meter. RCA VICTOR DIVISION OF RADIO CORPORATION OF AMERICA, CAMDEN N. J., U. S. A. 收音机爱 好者资料库 RadioFans.CN PAGE 565-C 86T6 L11 SEC.ADJ 455 K,C. L13 SEC ADJ - 455 K.C, C11- OSC. 6000 HC. CIOOSC. / 1500 KC. CT osc. - 20,000KC. LS -O SC., 600 KC BOTTOM EDGE - REAR OF CHASSIS Figu

12、re 2-Radiotron, Component Part, and Trimmer Locations Alignment With the gang tuning -condenser plates in flillmcsh pose Lion, adjust the pointer to the low -frequency (end) calibra tion mark on the dial scale. The pointer is soldered in place on the drive cable. Connect the low output terminal of t

13、he test oscillator to the receiver G (ground) terminal for all alignment opera- tions. Regulate the output of the test oscillator so that mini- mum signal is applied to the receiver to obtain an observ- able output indication. This will avoid a -v -c action. The term Dummy antenna means the device w

14、hich must be connected between the high test -oscillator output and the point of connection to the receiver in order to obtain ideal alignment. No signal, 550-750 kc means that the receiver should be tuned to a noint between 550 and 750 kc where no signal or interterence is received from a station o

15、r local (heterodyne) oscillator. For further details on alignment, refer to booklet RCA Victor Receiver Alignment. 5 C44 T-RiMMERS 4-= Ta C43 C42 C41 C40 6 S 3 C35 M ON545 544 O COM b 543 S42 541 S40 BRACKET LANCE COMMO SELECTOR SWITCH; C46 525 S24 523 522 S21 520 6 L25 4L24 . s DRESS AWAY FROM COIL

16、 A L23 L22 L21 L20 , 2 1 .1,63.4 COILS SLOE YELLOW . REO BLUE. GREEN Figure 3-lfiring Diagram of Electric Tuning Unit Procedure Precautionary Lead Dress.-(1) 6F5 grid lead should he dressed away from adjacent electrolytic, C-12. (2) Leads from push-button socket on side apron must he twisted and dre

17、ssed away from chassis. Maintain original length, size, and position of: (3) C -band antenna lead; (4) Antenna series condenser, C-1, lead: (5) C -hand oscillator leads to range switch and chassis: (6) Oscillator plate lead to prince switch. Adjustments For Electric Tuning Each pushbutton connects a

18、 particular oscillator coil and antenna trimmer condenser. The tuning of this coil and this condenser selects a station. Clockwise rotation of cores or trimmer screws lowers frequency. The frequency ranges for various push -buttons arc: No. 1 540 to 1,160 kc - Adjust L-20 and C-40. No. 2 540 to 1,16

19、0 kc - Adjust L-21 and C-41. No. 3 600 to 1,265 kc - Adjust L-22 and C-42. No. 4 600 to 1,265 kc - Adjust L-23 and C-43. No. 5 785 to 1,550 kc - Adjust L-24 and C-44. No. 6 785 to 1,550 kc - Adjust L-25 and C-45. GREEN Test Oscillator Range Selector Receiver Dial Setting Circuit to Adjust Adjustment

20、 Symbols Adjust to Obtain Order of Align- ment Connection to Receiver Dummy Antenna Frequency Setting 1 6K7 I -F Grid Cap .001 Mfd. 455 kc A Left No Signal 550-750 kc 2nd I -F Trans. L12 and L13 Max. (peak) 2 6A8 Det. Grid Cap .001 Mftl. 45:; kc No Signal 550-750 kc 1st I -F Trans. L10 and Lll Max.

21、(peak) 3 Ant. Term. 300 Ohms 6,000 kc B Center 6.0 mc B Osc. C11 Max. (peak)* 4 Ant. Term. 300 Ohms 6,000 kc B 6.0 mc B Ant. C2 Max. (peak)t 5 Ant. Term. 300 Ohms 20,000 kc C Right 20.0 mc C Osc. C7 Max. (peak)t 6 Ant. Term. 200 Mmfd. 600 kc A 600 kc A L -F Osc. L8 Max. (peak) 7 Ant. Term. 200 Mmfd.

22、 1,500 kc A 1,500 kc A H -F Osc: C10 Max. (peak) 8 Ant. Term. 200 Mmfd. 600 kc A 600 kc A L -F Osc. L8 Max. (peak) 9 Ant. Term. 200 Mmfd. 1,500kc A 1,500kc A H -F Osc. C10 Max. (peak) _ _ _ _.,:_, .ao, eA;,atments for Electric Tuning. 10 I Set up electric * Use minimum capacity peak if two peaks can

23、 be obtained. 1- After this adjustment, check for image signal by shifting receiver dial to 5.09 mc. $ Use maximum capacity peak if two peaks can be obtained. After this adjustment, check for image signal by shifting receiver dial to 20.91 mc. Note that the heterodyne oscillator tracks above the sig

24、nal frequency on bands A and B, and below the signal frequency on band C. 收音机爱 好者资料库 RadioFans.CN PA E 566-C 收音机爱 好者资料库 RadioFans.CN PAGE. 567-C 8676 REPLACEMENT PARTS Insist on genuine factory -tested parts, which are readily identified and may be purchased from authorized dealers STOCK DESCRIPTION

25、 O K STOCK DESCRIPTION ASSEMBLIES 1.4340 Shaft -Drive pulley and knob shaft -fastens on range switch shaft 14380 Arm -Hub and arm for operating band indicator 12008 Shield-I.F. transformer shield can shutter -fastens on range switch shaft 11196 Socket -8 -contact Radiotron socket 14352 Belt -Station

26、 selector drive belt 31027 Socket -4 -contact female socket for electric tun - 13216 Board -Antenna and ground terminal board ing unit cable plug 12717 Board -Phonograph terminal board 14114 Socket -Dial -lamp socket 12607 Cap -Top shield cap for first I.F. transformer. 12007 Spring -Retaining sprin

27、g for core, Stock No. 12581 Cap -Top shield cap for second I.F. transformer 12006 11350 Cap -Grid contact cap 30585 Spring -Tension spring for pointer cord 12723 Capacitor -56 Mmfd. (C5) 30588 Spring -Tension spring for idler pulley 14262 Capacitor -110 Mmfd. (C14, C15) 31025 Switch -Range switch (S

28、i, S2, S3, S4) 12404 Capacitor -120 Mmfd. (C27, C28) 30574 Tone control and power switch (R18, S5). 12406 Capacitor -180 Mmfd. (C19) 14376 Transformer -First I.F. transformer (1.10, L11, 12488 Capacitor -270 Mmfd. (C21) C14, C15) 30433 Capacitor -470 Mmfd. (C4, C9) 14308 Transformer -Second I.F. tra

29、nsformer (L12, 30592 Capacitor -1,600 Mmfd. (C8) L13, C19, C27, C28, R7) -. . 30303 Capacitor -.0035 Mfd. (C1) 30571 Transformer -Power transformer, 105-125 volts, 4838 Capacitor -.005 Mfd. (C23, C31) 25-60 cycle (Ti) 14393 Capacitor -.01 Mfd. (C20, C22) 30607 Transformer -Power transformer, 105-125

30、 and 4858 Capacitor -.01 MEd. (C36) 200-250 volts, 50-60 cycle (T1) 4870 Capacitor -.025 Mfd. (C30) 30575 Volume Control (R8) 4839 Capacitor -0.1 Mfd. (C16, C17) 12484 Capacitor -0.25 Mfd. (C13) 11203 Capacitor -10 Mfd. (C24) REPRODUCER ASSEMBLIES 30577 Capacitor Pack -Comprising two sections each 1

31、0 Mfd. (C12, C26) 13677 Cone -Reproducer cone and dust cap (for 5212 Capacitor -16 Mfd. (C25) speaker marked 84091-1 or 84001-3) (L14) 4358 Clamp -Mounting clamp for capacitor pack, Stock No. 30577 14934 Cone -Reproducer cone and dust cap (for speaker marked 84091-2 or 84001-6) (L14) 30578 Coil -Ant

32、enna coil (L1, L2, L3). 14613 Reproducer complete (marked 84001-3 or 6 but 30579 Coil -Oscillator coil (L4, L5, L6, L7, L8, L9) interchangeable with speaker marked 84091-1 30573 Condenser -2 -gang variable tuning condenser or 2) (C2, C3, CS) 14615 Transformer -Output transformer (for speaker 30580 C

33、ondenser -3 -gang mica trimmer -two sections marked 84091-1 or 84001-3) (T2) each 2-10 Mmfd., one section 3-30 Mmfd. (C7, C10, C11) 14935 Transformer -Output transformer (for speaker marked 84091-2 or 84001-6) (T2) 30586 Cord -Station -selector indicator pointer cord. 12800 Core -Adjustable core and

34、 stud for oscillator coil 12008 Core -Adjustable core and stud for I.F. trans- former MISCELLANEOUS ASSEMBLIES 30589 Dial -Station -selector dial scale 31026 Disc -Band indicator disc, complete with operat- 30981 Button -Push buttpn for electric tuning switch ing hub and arm, and connecting link 310

35、29 Capacitor -Adjustable trimmer 15-150 Mmfd. 30572 Drive -Vernier drive shaft and pinion gear for (C44, C45) variable condenser 30764 Capacitor -Adjustable trimmer 65-280 Mmfd. 30584 Drum -Station -selector drive -cord drum with set (C42, C43) . screws 30765 Capacitor -Adjustable trimmer 120-470 Mm

36、fd. 30583 Indicator -Station -selector indicator pointer and (C40, C41) holder assembly 31032 .Capacitor -105 Mmfd. (C35) 5226 Lamp -Dial lamp 13762 Capacitor -1,500 Mmfd. (C46) 30587 Pulley -Drive -belt pulley for condenser shaft. 30747 Coil -Electric tuning oscillator coil (L24, L25) 14638 Pulley

37、-Drive -belt idler pulley 30748 Coil -Electric tuning oscillator coil (L22, L23) 14525 Resistor -22 ohms, carbon type, * watt (R13) 30749 Coil -Electric tuning oscillator coil (L20, -L21) 30590 Resistor -39 ohms, carbon type, i watt (R19) 30846 Core -Adjustable core and stud for electric tun - 30771

38、 Resistor -50 ohms, flexible type, 1/10 watt ing oscillator coils (R20) 31095 Discs -10 celluloirl protector discs for call letter 30591 Resistor -220 ohms, insulated wire wound, 1.1 markers watt (R12) 30593 Escutcheon -Dial escutcheon and crystal 11298 Resistor -5,600 ohms, carbon type, 1 wat. (R5)

39、 14359 Knob -Station selector knob 14559 Resistor -10,000 ohms, insulated, * watt (RI7) 14269 Knob -Tone control, volume control, or range 30151 Resistor -18,000 ohms, insulated, 1 watt (R3) switch knob 14284 Resistor -22,000 ohms, carbon type, 1/10 watt (R7) 31028 Marker -Station call letter marker

40、s for electric tuning push buttons 12454 Resistor -33,000 ohms, insulated, i watt (Rl) 30550 Plug -4 -prong male plug for electric tuning unit 11323 Resistor -270,000 ohms, carbon type, i watt cable (R10) 14267 Screw -Chassis -mounting screw and washer as - 13005 Resistor -390,000 ohms, carbon type,

41、 1/10 watt sembly . (R11) 14270 Spring -Retaining spring for knob, Stock No. 11452 Resistor -470,000 ohms, carbon type, 1/10 watt 14269 (R2) 4982 Spring -Retaining spring for knob, Stock No. 12679 Resistor -2.2 meg. insulated, i watt (R4, R9) 14359 14887 Retainer -Band -indicator disc retainer 12007

42、 Spring -Retaining spring for core, Stock No. 14343 Ring -Retaining ring for range switch shaft 30848 14350 Screw -No. 8-32 x 3/16 in. square -head set screw for drum, Stock No. 30584, arm, Stock No. 14380, and pulley, Stock No. 30587. 31030 Switch -Electric tuning station selector switch only -less push buttons (S20, S21, S22. S23, S24, S25, S40, S41, S42, S43, S44, S45) ADDITIONAL REPLACEMENT PART Stock No. 14616 Coil - Fleld coil for loudspeaker