RCA-Victor-Co-Inc-RC-482B 电路原理图.pdf

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1、MANUAL OF 1939 MOST POPULAR SERVICE DIAGRAMS RCA VICTROLA MODEL U-9 no. rc msb) Five-Tube, Sinsle-Band, A-C, Superheterodyne Miscellaneous Service Data PHONOGRAPH MECHANISM. The phonograph motor is self-starting and operates the turntable through friction drive between the motor spindle and the rubb

2、er tire on the underside of the turntable. The rubber driving tire on the turntable should never be removed since it is ground in to be concentric with the spindle. If replace ment is required, the entire turntable should be replaced. The speed regulator raises and lowers the motor. This changes the

3、 driving ratio between the motor and the turntable due to the motor spindle being conical in shape. It is important to adjust this regulator for a turntable speed of 78 r.p.m. WHILE PLAYING A 10- INCH RECORD WITH THE NEEDLE APPROXIMATELY ONE INCH FROM THE OUTER EDGE OF THE RECORD Lubrication.The mot

4、or should be lubricated as follows: Place a few drops of S.A.E. 20 (or equivalent) on the turntable spindle and s.aturate the oil retaining felt pads on the motor shaft with S A E 10 oil. This oiling process should be repeated once or twice a year CAUTION.THE MOTOR DRIVE SPINDLE AND RUBBER DRIVING T

5、IRE ON THE TURNTABLE MUST BE KEPT CLEAN AND ENTIRELY FREE FROM OIL AND GREASE AT ALL TIMES. motorboard .turntable motor speed SPINDLE .cREOULATOR Alisnment Procedure Output Meter Alignment.Connect the meter across the voice coil, and turn the receiver volume control to maximum. Test Oscillator.Conne

6、ct the low side of the test oscillator to the receiver chassis through a 0.01 mfd capacitor, and keep the output as low as possible. Pre-Setting Dial.With gang condenser in full mesh, the pointer should coincide with the left hand mark stamped in the dial back- plate. Antenna.This set is equipped wi

7、th a built-in loop antenna. If an outdoor antenna is used, it may be connected to the green antenna lead, stapled to the base of the cabinets The Vienna should not be longer than 100 feet including the lead-in. If it is longer, connect a lOU imnfd. capacitor in series with the lead-in. Steps Connect

8、 the high side of test oscillator to Tune test osc. to Turn radio dial to Adjust the follow ing for max. output 1 Tuning Cond. stator (det.) in series with 0.01 mfd. 455 kc Quiet Point at 1,600 kc end of dial C24, C26, C26 (1st and 2nd 1-F transformers) 收音机爱 好者资料库 RadioFans.CN PACT 283-0 RUBBER TIRE

9、 LUBRICATE WITH LIGHT MACHINE OIL TURNTABLE OPENING SPEED REGULATOR TURNTABLE SPINDLE NEEDLE CUP VICTROLA-RADIO TONE CONTROL RA01 VICT401.A ( RILL ELIOtY) r1 .- EuaR ruLL t PICKUP el J . , ,N PICKUP REST MODEL U-9 Chassis No. RC -482B B, RC -482C Five -Tube, Single -Band, A -C, Superheterodyne At Le

10、f t- Top View of Motorboard At Right- Model U-9 Electrical and Mechanical Specifications FREQUENCY RANGE Standard Broadcast and one Police Band 540-1,720 kc INTERMEDIATE FREQUENCY 455 kc TUBE COMPLEMENT (1) RCA -12$A7 1st Detector-Oscillator (2) RCA-12SK7 I -F Amplifier (3) RCA-12SQ7 2nd Detector, A

11、.V.C., A.F. (4) RCA-50L6GT Power Output (5) RCA-35Z5GT Rectifier PILOT LAMP (1) Mazda No: 51, 7.5 volts, 0.2 amp. LOUDSPEAKER (84843-1 or RL81-2) Type 5 -inch P M Dynamic Voice Coil Impedance 1 (84843-1) . 3.4 ohms at 400 cycles 1 (RL81-2). d FI ohms at 400 cycles LOUDSPEAKER (RL -81-A3) Type 5 -inc

12、h P M Dynamic Voice Coil Impedance 4.0 ohms at 400 cycles Miscellaneous Service Data PHONOGRAPH MECHANISM.- The phonograph motor is self-starting and operates the turntable through friction drive between the motor spindle and the rubber tire on the underside of the turntable. The rubber driving tire

13、 on the turntable should never be removed since it is ground in to he concentric with the spindle. if replace- ment is required, the entire turntable should he replaced. The speed regulator raises and lowers the motor. This changes the driving ratio between the motor and the turntable due to the mot

14、or st,indle being conical in shape. It is important to adjust this regulator i,rr :i turntable speed of 78 r.p.m. WHILE PLAYING A 10 - INCH RECORD VITH THE NEEDLE APPROXIMATELY ONE INCH FROM THE OUTER EDGE OF THE RECORD. Lubrication.-The motor should be lubricated as follows: Place a few drops of S.

15、A.E. 20 (or equivalent) on the turntable spindle and saturate the oil retaining felt pads on the motor shaft with S.A.E. 111 oil. This oiling process should he repeated once or twice a year. CAUTION.-THE MOTOR DRIVE SPINDLE AND RUBBER DRUING TIRE ON THE TURNTABLE MUST BE KEPT CLEAN AND ENTIRELY FREE

16、 FROM OIL AND GREASE AT ALL TIMES. MOTORBOARD /TURNTABLE -_.rry.1r._7etI . .4.111.Orr_.oc MOTOR Turntable Assembly Stock No. 33899: The turntable and tire assembly Stock No. 33899 is superseded by: Stock No. 37971-Turntable and spindle, less tire Stock No. 37872-Tire only MOTOR SPEED SPINDLE ,REGULA

17、TOR i7 UBRICATE WITH LIGHT MACHINE OIL. Self-starting motor PHONO MECHANISM Edge -driven turntable Adjustable Speed PtCKut Crystal Pickup Impedance 0.1 meg. at 1,000 cycles POWER OUTPUT RATING Undistorted 0.71 watts Maximum 1.36 watts POWER SUPPLY RATINGS A-6 105-125 volts, 60 cycles A-5 105-125 vol

18、ts, 50 cycles POWER CONSUMPTION 55 watts Alignment Procedure Output Meter Alignment.-Connect the meter across the voice ,.oil, .,ud turn the receiver volume control to maximum. Test Oscillator.-Connect the low side of the test oscillator to the rect. trr chassis through a 0.01 mfd capacitor, and kee

19、p the output as Ion as possible. Pre -Setting Dial.-With gang condenser in full mesh, the pointer should coincide with the left hand mark stamped in the dial back - plate. Antenna.-This set is equipped with a built-in loop antenna. If an outdoor au1rnna is used, it may be connected to the green ante

20、nna Ictul. stapled to the base of the cabinet. The antenna should not be lon,.,er than Ioo feet including the lead-in. If it is longer, connect a loo ntmid. capacitor in series with the lead-in. Steps Connect the high side of test oscillator to- Tune test osc. to- Turn radio dial to- Adjust the foll

21、ow - ing for max. output- 1 Tuning Cond. stator (let.) in series with 0.01 mfd. 455 kc Quiet Point at 1,600 kc end of dial C24, C25,.C26 (1st and 2nd I -F transformers) 2 Antenna lead (green)grma(out series with 100 mmfd. 1,720 kc Full Clockwise of mesh) C22 (osc.) 3 1,500 kc Resonance on 1,500 kc s

22、ignal C21 (ant.) Turntable Wobble: Turntables (Stock No. 33899) found to have excessive wobble (vertical run -out) may be trued -up in the following manner: (a) Obtain a motor hearing, Stock No. 31046 (used in R93 -B) and clamp same securely in a vise. (b) Place turntable spindle in this bearing and

23、 make sure that turntable spins freely. (e) With turntable spinning, the high side can readily be determined by use of a piece of chalk carefully lowered so that it must touches thr high spot of the turntable. leaving a mark. (d) With both hands grasp the rim of the turn table. thumbs on top and ind

24、ex fingers underneath turntable at the center of the chalk mark. (e) Apply a moderate amount of pressure in a -downward direction at right angle to the jaws of the vise. (f) Spin turntable again and if still running out, repeat operation mentioned under (c), continuing by trial until turntable runs

25、true. 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 284-C U-9 O BUBE SOCIKETSEW F L C8 0.1 MFD COILS C 20 9-345 19 P z zR,o1 o 05c. ,j) 125A7 1 DET-OSC. 94 V. C 85-I4 I MME. L RED 94 v. 94v IST I.F. TRANS. i-+GREEN L4 LS 86 C25104 12SK7 IF R

26、ED r IBN L6 R 4T R4 2.MFG ILI LOOP o v fa 05C. COILS e e G 2 I.F 0c26 01T1ZoK I CM ,15 459K TUBE LOCATIONS AND ALIGNMENT SCREW POSITONS 12SQ7 2 DET-A.F-A.vG. 46 V. (OPERATING VOLTAGE) 2ND. I.F TRAN_._ ._ GREEN B wi Ll 90 nME Ii BLACK R16 5A 250,0004 CONTR f-, HfD SOLGGT 6.5 Y. OUTPUT IOc ERATINU VOL

27、TAGE) 18L RT 220,000A SI$FD I. II T RIO 470000A -CIO D LIF I18V. TI O O* 94V. II CII -025 MFD. C vc PERMANENT- MAGNET DYNAMIC SPEAKER .0035 MFD. 0.3 ,21o, 62 FRONT VIEW RA010-PHOTOTONE 355 5402.!1 IN 1 RADIO POSITON. CATHODE CURRENTS 111 12547 _ _ - I.6 MA. 121 12SO7 - - - II . T MA. 131 12507 U. 15

28、 MA. (41 SOLRGT - 36,0 MA. TOTAL RECTIFIED -BCURRENT - 60.0 MA. 1ST PROD. RC- 482 8 NOICATi W GCHASSIS COMMON IRING ROUND INSULATED raoM cHAsUIs 35ZSGT EC T. vase? RII 1000A 03 MFD 1 90.47 Ri 3 O I. .0,e .p15 /OF FRAME /g, MIF-0. OF 52 PICR-UP,./rf I -f 0.;, bF0_ F-14 RI (ON vOl1A,E1 CONTRO 5 SNITCH

29、 ON RADIO-PHOND.62 I+-(6W K20X c H_ CONVERSION GAIN 5 IX-+:BOX-0.8% OX I (60O TO 455 1(C ) I vew BUBEOTOM SOCKETSF O LOOR 50-_ MFD ID 2n t L. Inl M4, 99 - 0 MMF 0 r,5C5 COILS Y c 1 C23 L3 of 73-170 T MMP C4 0.2-IH 02 - HfD 2ND PROD. RC -482C 125A7 125K7 12S Q-7 Cl? F 1sDET-OSC LF 2DET-A.F-A.vC. mpl

30、80V Meng R13 nrr LtaC005 ROO 7v. ! (600XC) -8v. , (1500 KC) RED -IS VOLTS AVC WITH 0.2 V. INPUT TO ANT. AT 600 KC. VOLTAGES SHOULD MOLD WITHIN *20% WITH 117V. AC. SUPPLY. *MEASURED WITH CHANALYST, OR VOLT HM YST. LEAD black -high side of AC line heaters C7, C9, C19, C15, R6, R7, R10, Shield Cable (g

31、reen and yellow) blue and brown leads from phono switch green converter lead green diode lead DRESS Away from R10, C9, R7 and C15 ; against side of chassis down against chassis up away from chassis Tape to shielded cable away from phono switch black leads Against base and away from diode lead Away f

32、rom 12SQ7 grid -1 iilA. 2222- I. CIO 0.1 LIED IOX Ri0 470.00555 a C13 .r M Re 100,0004 2 SOL6GT OUT PU 93 V. TI APPROX. GAIN DATA, USING RCA RIDER CH ANA LYS T. VC V l$ PERMANENT. 1 MAGNET MKS fiNTAFIe MFD. SPEAKER C 0023 WD. -1l 52 FRONTAEw SHOOWIOy-D RADE OOSITON. 3SGT CT. CID 40 MFG SOLAR, IlsAl

33、1 14 - :55 Issn 1 l)I n rtr=Llr OIAL LARAI O Y BL4C K s IN4ULAT20 raoM CN/9l5 RII Sod .r1 MfQ de TO *RAMC OF 52 cK-Ir YpL uo.;IHra MOTOR 35 TUBE LOCATIONS AND ALIGNMENT SCREW POSITIONS IRC482C) -l-POI +0. i2 收音机爱 好者资料库 RadioFans.CN PAGE 285-C U-9 Replacement Parts Insist on eenulne Factory -tested b

34、arb, which are readily identified and nay be purchased from authorized dealers. STOCK No. DESCRIPTION STOCK No. DESCRIPTION CHASSIS ASSEMBLIES CHASSIS ASSEMBLIES RC- 482 B (RC -482C) 12724 Capacitor -120 mmfd. (C27) 30303 Capacitor-.0035 mmfd. (C15) 13057 Capacitor -68 mmfd. (C3) 13057 Capacitor -68

35、 mmfd. (C3) 34459 Capacitor-.0025 mfd. (C15) 33584 Capacitor-.005 mfd. (C7) 11315 Capacitor-.015 mid. (C17) 4937 Capacitor-.01 mfd. (C9) 30938 Capacitor-.025 mid. (C7, C11) 11315 Capacitor-.015 mfd. (C17) 4937 Capacitor-.01 mfd. (C8, C9) 30938 Capacitor-.025 mfd. (C11) 32787 Capacitor-.05 mfd. (C12)

36、 32787 4839 34505 34873 Capacitor-.05 mfd. (C12) Capacitor -0.1 mid. (C5, C8, C10, C18) Capacitor -0.2 mfd. (C6) Capacitor-Electrolytic comprising 1 section of 4839 34505 34873 34443 Capacitor -0.1 mfd. (C5, C10, C8) Capacitor -0.2 mfd. (C6) Capacitor-Electrolytic comprising 1 section of 40 mfd. and

37、 1 section of 30 mid. Coil-Oscillator coil 40 mfd. and 1 section of 30 mfd. 34843 Condenser-Tuning condenser 34443 Coil-Oscillator coil (L2, L3) 34034 Control-Volume control and power switch. 34843 Condenser-Tuning condenser (C20, C21, C22, 32634 Cord-Drive cord C23) 33453 Drum-Drive cord drum 34034

38、 Control-Volume control and power switch (R16, S1) 34841 Frame-Dial and drive frame complete-less indicator drive cord, tuning shaft and drive 32634 Cord-Drive cord drum 33453 Drum-Drive cord drum 34842 Indicator-Station selector indicator 34841 Frame-Dial and drive frame complete-leas 11765 Lamp-Di

39、al lamp indicator drive cord, tuning shaft and drive 35130 Loop-Antenna loop drum 30868 Plug -2 -contact female plug for motor cable. 34842 11765 35130 Indicator-Station selector indicator Lamp-Dial lamp Loop-Antenna loop 5119 12071 3153 13998 Plug -3 -contact female plug for speaker cable. Resistor

40、 -120 ohms, watt. (R9) Resistor -1,500 ohms, 1 watt (R11) Resistor -22,000 ohms, I watt (R1) 30868 Plug -2 -contact female plug for motor cable. 5132 Resistor -47,000 ohms, 1.10 watt 5119 Plug -3 -contact female plug for speaker cable. 12412 Resistor -47,000 ohms, watt (R14) 12071 Resistor -120 ohms

41、, watt (R3) 14560 Resistor -100,000 ohms, watt (R8) 30545 Resistor -180 ohms, watt (R9) 12264 Resistor -220,000 ohms, watt (R7, R13). 30152 Resistor -1,000 ohms, 1 watt (R11) 12285 Resistor -470,000 ohms, I watt (R10) 13998 Resistor -22,000 ohms, watt (Rl) 12679 Resistor -2.2 meg., watt (R4, R17) 51

42、32 Resistor -47,000 ohms, 1/10 watt (R15) 13601 Resistor -10 meg., watt (R6) 12412 Resistor -47,000 ohms, watt (R14) 34033 Shaft-Tuning shaft 14560 Resistor -100,000 ohms, watt (R8) 34449 Socket-Dial lamp socket 12264 Resistor -220,000 ohms, watt (R7, R13). 32537 Socket-Tube socket 12285 Resistor -4

43、70,000 ohms, watt (R10) 33298 Spring-Retaining spring for drum Stock No. 12679 Resistor -2.2 megohm, watt (R4) 33453 13601 Resistor -10 megohm, watt (R6) 34844 Transformer-First I -F transformer 34033 Shaft-Tuning shaft 34442 Transformer-Second I -F transformer 34449 32537 Socket-Dial lamp socket So

44、cket-Tube socket 11908 Washer-C washer for holding shaft Stock No. 34033 33296 Spring-Retaining spring for drum, Stock No 33453 SPEAKER ASSEMBLIES 34844 Transformer-let i.f. transformer (L4, L5, C24, (RL -81A3) 34442 C25) Transformer -2nd i.f. transformer (L6, L7, C26, R15) 32907 35570 5118 Cap-Dust

45、 cap Cone-Cone complete with voice coil Plug -3 -prong male plug for speaker 11908 Washer-C washer for holding shaft, Stock 35904 Transformer-Output transformer No. 34033 MOTOR ASSEMBLIES SPEAKER ASSEMBLIES (RL 81-2) 32654 33897 33902 Ball-Ball for turntable bearing Base-Motor base and ball assemble

46、d Motor-Complete motor 105-125 volts, 60 cycle 32907 Cap-Dust cap (M1) 34554 Cone-Cone complete with suspension and voice coil 34496 Motor-Complete motor 105-125 volts, 50 cycle (M1) 5118 Plug -3 -prong male plug for speaker 33896 Mounting-Motor cradle mounting hardware and 34846 Transformer-Output

47、transformer retainer SPEAKER ASSEMBLIES PICKUP AND ARM ASSEMBLIES (84843-1) 33591 Arm-Pickup arm only-less cartridge, base and 34847 Cone-Cone complete with voice coil, center cable suspensions, dust screen and rim gaskets 34481 Arm-Pickup pivot arm and shaft -Saar-Pickup 5118 Plug -3 -prong male pl

48、ug for speaker 34482 mounting base 34848 Transformer-Output transformer 34758 Bushing-Rubber bushing and metal bushing for pickup.,pivot arm shaft MISCELLANEOUS ASSEMBLIES 33129 Cyital-Pickup crystal cartridge and needle 33680 Cup-Needle cup Screw 34849 Dial-Glass dial scale 84311 1RIae-Retaining ring