RCA-Victor-Co-Inc-9Q4 电路原理图.pdf

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1、PAGE 232-C MODEL 904 Chassis No. RC -478 Nine -Tube, Four -Band, A -C, Superheterodyne Receiver Electrical Specifications FREQUENCY RANGES Long Wave (X Band) 145-405 kc (2,069-740 m) Standard Broadcast (A Band) 540.1,720 kc (555-174 m) Medium Wave (B Band). 2.3-7.0 me (130.42.8 m) Short Wave (C Band

2、) 7.0-22.0 me (42.8.13.6 m) INTERMEDIATE FREQUENCY 455 kc TUBE COMPLEMENT (1) RCA-6SK7 R -F Amplifier (2) RCA-6SA7 1st Detector -Oscillator (3) RCA-6SK7 I -F Amplifier (4) RCA-6SQ7 2nd Detector, A.V.C., and A -F Amplifier (5) RCA-6SF5 Phase Inverter (6) RCA -6F6 -G Output (7) RCA -6F6 -G Output (8)

3、RCA-6U5/6G5 Tuning Indicator (9) RCA -5U4 -G Rectifier PILOT LAMPS (2) Mazda No. 44, 6.3 volts, 0.25 amp. LOUDSPEAKER (RL -63K-3) Type 8 -inch electrodynamic 2.2 ohms at 400 cycles V.C. Impedance POWER SUPPLY Rating A Rating B Rating C RATINGS 105.125 volts, 50-60 cycles, 1 1 5 watts 105-125 volts,

4、25-60 cycles, 115 watts 105.130, 140-160, 200-250 volts, 40-60 cycles, 115 watts POWER OUTPUT RATING Undistorted 10 watts Maximum 12 watts PULLEY TENSION SPRING BAND INDICATOR BAND INDICATOR SHOWN IN SNORT WAVE -I BAND POSITION. BAND INDICATOR TENSION ADJUSTMENT DRIVE CORD DRUM - 2 T TURNS O O 10 PU

5、LLEY PULLEY TENSION SPRING BACCNNIEDpp SN 1004 SHOWN WITH GANG AT MAXIMUM CAPACITY. O O Drive Cord and Band Indicator Arrangement Calibration Scale inivitritett uipperpu yorriterfnnrettriternnminrmm pettrett nn ttptiret/ O 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 LONG WAVE 150

6、170 200 250 300 350 400 I I I 1.1.1 / . . / . , / . 2000m 1800 m 1600 m 1400 m 1200m 1000 m 900 m 800 m 550 600 700 800 1000 1200 1400 M Y I . ,. I./ I. 1. I/.I/I/./.I 550m 500m 450m 400m 350m 300m 250m 200m SHORT WAVE -1 TROPICAL TROPICAL BROADCAST BROADCAST 120m AIRrRAFT 90m 2.3 2.5 3.0 3.5 TROPIC

7、AL MEXICO CITY CHICAGO N. YORK BROADCAST HAVANA - BERLIN - PITTSBURGH AMATEUR 60 m 49 m CINCINNATI - TORONTO 4.0 5.0 6.0 EASTERN HONG KONG SPRINGFIELD ROME BERLIN TOK YO PITTSBURGH LONDON SCHENY HEMISPHERE LONDON . SCHENECTADY - MADRID LONDON ROME - PARIS BERLIN - PITTSBGH RIO BERLIN PHILADELPHIA 31

8、m MUIZEN 25m PRAGUE AMTR 19m PARIS B B - B -B BBB R. i B B i R Rai- . SHORT WAVE -2 1 40 m 8 9 10 BERLIN LONDON BERLIN - PITTSBURGH N. YORK - PARIS LONDON -SCHENK 16 m HUI IEN 13m NEW YORK 12 14 16 18 20 22 SHORT WAVE -I 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 Receiver Dial

9、Scales, and Corresponding 0-180 Calibration Scales 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 ,71811 g11 vOO 11Z or VI PAGE 233-C 9Qu 收音机爱 好者资料库 RadioFans.CN i . 234-C 9Q4 v oo r fl c y V v u y O p a C C d E O o y 3r. V V h id a t wL L L y V y

10、 o0 OO.cw N Cw C) egl S y C a N . Ev ?; d .1 d .-. a Oy L 34 r H 1 71 C ,4 C7 r%i ,dp 00 C dEL 3 p .+ o vi vyi . C A g $ A A A m m .: 收音机爱 好者资料库 RadioFans.CN PAGE 235-C 994 Alignment Procedure Cathode -Ray Alignment is the preferable method. Connec- sN-IooT C2 C9 C44 9D4 (RC.47B) tione for the oscil

11、lograph are shown in the chassis drawing.s-AriTMC. AAST 6U5 MC. ISOO KC S60 KC. Output Meter Alignment.-If this method is used, con- nett the meter across the voice. coil, and turn the receiver , fir ,C ,5 CALT. cs7 , 4 5 6 volume control to maximum. Test-Oscillator.-For all alignment operations, co

12、nnect the low side of the test -oscillator to the receiver chassis, and keep ZO MC. C6 oL n 6osc. 040 6SA7 6SF5 6F63 c 6 MC. 10 xo SC. L1S 2nD. SET PHASE OUTPUT ITS KC. SEC. ADI AVC 6 AP INVER ss KC. the low to a -v -c action. 1ST TR g output as as possible avoid Calibration Scale on Indicator -Driv

13、e -Cord Drum. - The tuning dial is fastened in the cabinet and cannot be used for I 6SK7 RF czsp DOT. s sc. 2 6SA7 6F6 reference during alignment; therefore, a calibration scale is OUTPUT I.F RECT. POTWER attached to the rear of the drum which is mounted on the frond shaft of the gang condenser. The

14、 setting of the gang condenser is read on this scale, which is calibrated in degrees. cal 360 KC. C6 , 15TIF 3 9 TRAN5. 6SK7 5U4G TRANS. ) Ln SEC. J The correct setting of the gang in degrees, for each align KC ment frequency, is given in the alignment table. Pointer for Calibration Scale.-Improvise

15、 apointer for the calibration scale by fastening a piece of wire to the gang- condenser frame, and bend the wire so that it points to the 0 mark on the calibration scale when the plates are fully meshed. Dial -Indicator Adjustment.-After fastening the chassis in the cabinet, attach the dial indicato

16、r to the drive cable with indicator at the 530 kc mark, and gang condenser fully meshed. For additional details, refer to booklet RCA Victor Re- ceiver Alignment. /Q ,., _,_ AC / / Cz0 C9 A-DET. 19 CDET CDSC L9 1500 KC 5 DST ZO MC ZO MC 6MC. 600 GUSHED PULLED RADIO PHONO ,/ EROAD lU77JJ Low LL RADIO

17、- PHONO / SELECTIVITY., TONE CONTROL CONTROL CIZ C15 A05C ,.osc VICTROLA 05C 1500 KC 360 KC JACK KC IN - MAO LOW TONES OUT- MIN. LOW TONES A C / OFF ALOUD r / 1 POWER -VOLUME TUNING RANGE CONTROL CONTROL CONTROL r Steps Connect the high side of test -ose. to- Tune test- ose. to- Turn radio dial to-

18、Adjust the following for maximum peak output 1 Turn tone control to 2nd position (sharp) from maximum counter -clockwise. 2 6SK7 I -F grid in series with .01 mfd. A Band Quiet point L18 and L19 (2nd I -F trans.) 3 6SA7 grid in series with .01 mfd. 455 kc between 550-750 kc L16 and L17 (1st I -F tran

19、s.) 4 Turn tone control to maximum counter should be a slightly double -peaked lowing steps. -clockwise curve. Return (broad) position tone control to 2nd and check I -F response which position (sharp) for the fol- 5 175 kc 175 kc (52.5) X Band L10 (osc.) Rock gang 6 Ant. terminal in 360 kc 360 kc (

20、148.5) X Band C15 (osc.) C21 (det.) C44 (ant.) 7 series with 200 mmfd. 600 kc 600 kc (32) A Band L9 (osc.) Rock gang 8 1,500 kc 1,500 kc (152) A Band C12 (ose.) C1S (det.) C3 (ant.) 9 Repeat steps 5, 6, 7, and 8. 10 Ant. terminal in series 6.1 me 6.1 me (151) B Band C11 (osc.)* C19 (det.) C2 (ant.)

21、11 with 300 ohms 20 me 20 me (157) C Band C9 (osc.)* C20 (det.) Cl (ant.) * Use minimum capacity peak if two can be obtained. Check to determine that C11 has been adjusted to the correct peak by tuning receiver to approximately 5.19 me where a weaker signal should be received. * Use minimum capacity

22、 peak if two can be obtained. Check to determine that C9 has been adjusted to the correct peak by tuning receiver to approximately 19.09 me where a weaker signal should be received. Note.-Oscillator tracks above signal on all bands. PAGE 236-C 9Q4 SPEAKER PLUG RED BROWN FIELD COIL BROWN 0 RED t NEUT

23、. COIL BLAC RED VOICE COIL BLACK PTO OUTPUT PLATES BLACK (51 20. BROWN TO C40 O 36 BROWN -BLACK TO C 41 Additional Replacement Parts: RED BLACK TO RECT. FIL. SOCKET Stock No. 34662 Cord -Pointer drive cord SPEAKER PLUG CONNECTIONS SNIOO5 35194 Dial -Marked in kc Replacement Parts Insist on genuine f

24、actory -tested parts, which ers readily identified and may be purchased from authorised dealers. STOoCK DESCRIPTION STOCK DESCRIPTION CHASSIS ASSEMBLIES 12695 Resistor -15,000 ohms, * watt (R14) (RC -478) 13998 Resistor -22,000 ohms, watt (R7) 12454 Resistor -33,000 ohms, watt (R3) 34401 Arm -Arm an

25、d hub for band indicator less 30650 Resistor -56,000 ohms, 3 watt (R16) cable -fastens on range switch shaft 1.2264 Resistor -220,000 ohms, watt (R15, R19). 34400 Belt -Drive belt 12285 Resistor -470,000 ohms, 3 watt (R18, R20). 31787 Board-Ant.-Grd. terminal board 12013 Resistor -1 megohm, 1/10 wat

26、t (R24) 32635 Cable -Cable and clips for band indicator 13730 Resistor -1 megohm, * watt (R2, R4, R13). 33821 Capacitor -Mica trimmer -3 sections 2-10 mmfd. 12679 Resistor -2.2 megohm, watt (R6) and 1 section 3-30 mmfd. (C18, C19, C20, 13601 Resistor -10 megohm, watt (R11, R10) C21) 30340 Retainer -

27、Retaining clip for pulley, Stock N.o. 12714 Capacitor -Air trimmer, 2-12 mmfd. (C9, C11) 31373 33818 Capacitor -Mica trimmer, 2 sections 2-20 mmfd. 34396 Shaft -Intermediate tuning drive shaft, and drive each (C12, C15) cord pulley -less drive belt pulley and set 12896 Capacitor -15 mmfd. (C43) scre

28、ws 33822 Capacitor -Mica trimmer, 4 sections 3-30 mmfd. 34397 Shaft -Intermediate tuning drive shaft, and fly - each (C1, C2, C3, C44) wheel -less drive belt pulley and set screws. 13545 Capacitor -39 mmfd. (C16) 31364 Socket -Dial lamp socket 12723 12720 Capacitor -56 mmfd. (C24) Capacitor -100 mmf

29、d. (C42, C31) 34864 14278 Socket -Magic Eye socket Socket -Phono. input socket 32239 Capacitor -110 mmfd. (C26) 31251 Socket -Tube socket 30232 Capacitor -200 mmfd. (C6) 31418 Spring -Pointer drive cord tension spring 12694 Capacitor -220 mmfd. (C5, C17, C22, C32). 34391 Switch -Phono. switch and fi

30、delity control switch 33760 Capacitor -220 mmfd. (C25, C27, C28) (S8) 33235 Capacitor -580 mmfd. (C13) 34390 Switch -Range switch (S1, S2, S3, S4, S5, S6) 12811 Capacitor -3,600 mmfd. (C10) 34596 Switch -Slide switch for tone control (S10). 31405 Capacitor -6,000 mmfd. (C7) 33759 Transformer -First

31、i -f transformer (L16, L17, 34459 Capacitor -.0025 mfd. (C34) L20, C25, C26) 33584 5148 Capacitor -.005 mfd. (C38, C39, C46, C48). Capacitor -.007 mfd. (C35) 33761 Transformer -Second i -f transformer (L18, L19, C28, R7) 4937 32787 Capacitor -.01 mfd. (C36, C47) Capacitor -.05 mfd. (C30) 34183 PoC3

32、Transformer -Power Tr volts,tran - 100/130, o volts, c cycles (owe 4839 34393 Capacitor -0.1 mfd. (C29, C33, C45)1u0 Capacitor -Electrolytic -2 sections 20 mfd. and 34389 Volume Control -Volume and power control switch (R9, S9) 33782 1 section 15 mfd. (C37, C40, C41) Coil -Antenna coil A -B -C Bands

33、 (L1, L2, L3, 33728 Washer -C washer for tuning shaft 32823 L4) Coil -Antenna coil X Band (L5, L6) SPEAKER ASSEMBLIES 33763 Coil -Detector coil A -B -C Bands (L11, L12, (RL63K3) 33765 L13, L14) Coil -Detector coil X Band (L15) 31825 Ca Dust l cap 33764 Coil -Oscillator coil A -B -C Bands (L7, LB, 34

34、615 Cone -Cone complete with voice coil (L2) L9) 31539 Plug -S -prong male plug -for speaker 32931 Coil -Oscillator coil X Band (L10) 34691 Speaker -8 -inch dynamic complete with cone and 33756 Condenser-3-gang variable tuning condenser voice coil -less output transformer (C4, C8, C23) 14534 Transfo

35、rmer -Output transformer (T2) 34595 Control -Tone control (R12) MISCELLANEOUS ASSEMBLIES 32713 Core -Adjustable core and stud for A -B -C Band coil MI -8105 Adapter -European adapter for power cord. 34392 Drum -Variable condenser drive drum 30766 Cap -Magic Eye rubber cap 11891 Lamp -Dial lamp 30716

36、 Clip -Magic Eye clip 14028 Nut -Clamping nut for air trimmer 34486 Dial -Glass dial scale (English) 31817 Plate -Cushion socket mounting plate, less 34504 Dial -Glass dial scale (Greek) socket 34485 Frame -Dial frame complete with brackets and 12493 Plug -5 -contact female plug for speaker cable pu

37、lleys less dial, indicator pointer, pointer 34399 Pulley -Drive belt pulley and set screws for tun- ing knob shaft rods, band indicator, band indicator spring and Magic Eye clip 34398 Pulley -Drive belt pulley and set screws for inter- 34488 Indicator -Band indicator mediate drive shaft 34487 Indica

38、tor -Station selector indicator pointer. 31373 Pulley -Drive cord pulley for L.H. support 34490 Knob -Tone control or radio phonograph knob 34402 Pulley -Drive cord pulley and bracket for R.H. 34489 Knob -Tuning range switch or volume control support and power switch knob 34394 Pulley-L.H. support a

39、nd drive cord pulleys (2) 4393 Screw -No. 8-32 headless set screw for knob, assembled, less loose pulley Stock No. 34490 34395 Pulley-R.H. support and drive cord pulleys (2) 33438 Screw -Magic Eye clip screw assembled, less loose pulley and bracket 34491 Shaft -Indicator pointer guide shaft 14281 Re

40、sistor -68 ohms, watt (R1, R17) 30756 Spring -Band indicator spring 13716 Resistor -2,200 ohms, * watt (RS) 4982 Spring -Retaining spring for knob, Stock No. 34189 Resistor -Voltage divider, 2 sections 5,000 ohms 34489 and 1 section 195 ohms (R21, R22, R23). 33728 Washer -Band indicator retaining washer