RCA-Victor-Co-Inc-Q31 电路原理图.pdf

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1、PAGE 438-C MODELS 030 and Q31 Chassis No. RC -538B RC -538C Six -Tube, Five -Band Superheterodyne POW ER-VOLUM E OPE- -T LOUD TONE POWER -VOLUME TONE CONTROL SHOWN WITH GANG AT MAS. CAPAC IT V. DRIVE CORD MODELS Q30 condensers at right angles to shield plates. 2. Speaker, pilot, and output filament

2、leads: between terminal board and output tube socket and against the base. 3. Leads to converter socket so that they do not impede the flexible mounting. 4. Oscillator grid and control grid condensers (to 6SA7) well apart, but at least in. from shield plates. 5. All filament and B+ leads close to ch

3、assis. 6. Black lead between the RF trimmer bank and switch: over the short wave RF coil and close to it. 7. Blue plate lead to 2nd I.F. transformer: under the brown and the red leads, and away from first I.F. transformer. 8. 2nd I.F. to diode lead (black): close to chassis and with yellow ground le

4、ad twisted about it closely. 9. Volume control high side condenser: close to base. 10. Phono lead and diode return lead to switch: away from power circuits and output tube socket. 11. .05 cond. from phono shield to ground up, under, and against joint of shielded cable. 12. R-12 (10 meg. grid res. on

5、 12SQ7) down against chassis. 13. Yellow lead from switch lug 2 to B lug on 2nd I.F. down against chassis and away from plate and fil. leads. Replacement Parts MODEL Q31 Insist on genuine factory -tested parts, which are readily identified and may be purchased hom authorized dealen. STOCK DESCRIPTIO

6、N STOCK N DESCRIPTION ASSEMBLIES 33773 Drum-Drive drum (RC -538C) 33185 Gear-Volume control gear and hub 33767 Link-Operating link between knob shaft and 34502 Arm-Operating arm between knob shaft and range switch range switch 5119 Plug -3 -contact female plug for speaker 37891 Ballast-Ballast tube

7、resistor 35630 Pulley-Drive cord pulley 37896 Bracket-L.H. bracket complete with 2 drive 37891 Resistor-Ballast tube reistor cord pulleys 35711 Resistor -100 ohms, 4 watts 37895 Bracket-R.H. bracket complete with 2 drive 30785 Resistor -150 ohms, 1 watt cord pulleys 31024 Resistor -680 ohms, watt 35

8、795 Calibrator-Drive drum calibrator 38325 Resistor -680 ohms, 2 watts 37059 Capacitor-Mica trimmer comprising 3 sections 30150 Resistor -3,300 ohms, 1 watt of 2.5-10 mmfd. each (C1, C2, C3, C20, 30128 Resistor -12,000 ohms, watt C24, C25) 38714 Resistor -15,000 ohm; watt 33097 Capacitor -4.7 mmfd.

9、(C27) 13998 Resistor -22,000 ohms, I watt 35648 Capacitor -6 mmfd. (C9) 12454 Resistor -33,000 ohms, # watt 13200 Capacitor -10 mmfd. (C51) 30651 Resistor -270,000 ohms, 4 watt 31350 Capacitor -18 mmfd. (C11) 30848 Resistor -470,000 ohms, watt 35644 Capacitor -47 mmfd., ceramic (C16) 13730 Resistor

10、-1 meg., watt 37329 Capacitor -47 mmfd., silvered mica (C5, C23). 12679 Resistor -2.2 meg., watt 12723 Capacitor -56 mmfd. (C49, C50) 30992 Resistor -10 meg., watt 36072 Capacitor -66 mmfd. (C4, C21) 31611 Screw-No. 8-32 milled head set screw for gear, 35645 Capacitor -68 mmfd. (C14) Stock No. 33185

11、 12720 Capacitor -100 mmfd., moulded mica (C36). 14350 Screw-No. 8-32 square head set screw for drive 30904 Capacitor -100 mmfd., mica I.F. (C30, C31). drum 31813 Capacitor -120 mmfd. I.F. (C33, C34) 37893 Shaft-Range switch knob shaft 36616 Capacitor -220 mmfd., mica (C35) 34132 Shaft-Shaft and gea

12、r for tone control 12694 Capacitor -220 mmfd., moulded mica (C17, 37894 Shaft-Tuning shaft and flywheel C28, C29, C42) 35634 Socket-Ballast tube resistor socket-Remove 31433 Capacitor -560 mmfd. (C7) terminals not required 35843 Capacitor -3,000 mmfd. (C8) 31365 Socket-Dial lamp socket 34459 Capacit

13、or-.0025 mfd. (C38) 33742 Socket-Phono input socket 33584 Capacitor-.005 mfd. (C43) 31251 Socket-Tube socket 5148 Capacitor-.007 mfd. (C40) 31418 Spring-Drive cord and pointer cord spring. , . 4937 Capacitor-.01 mfd. (C37) 33491 Switch-Radio-phono switch 5196 Capacitor-.035 mfd. (C39) 37050 Switch-R

14、ange switch 4886 Capacitor-.05 mfd. (C57) 34602 Switch-Pone switch 32787 Capacitor-.05 mfd. (C28) 35636 Transformer-First I.F. transformer 4839 Capacitor -0.1 mfd. (C18) 36615 Transformer-Second I.F. transformer 30867 Capacitor -0.5 mfd. (C32) 37891 Tube-Ballast tube resistor . 37892 Capacitor-Elect

15、rolytic comprising 1 section of 2917 Washer-C washer for tuning drive 80 mfd. 250 volts, 1 section of 40 mfd. 250 volta, 1 section of 10 mfd. 250 volts, and 1 section of 20 mfd. 25 volta (C52, C54, C48, C45) SPEAKER ASSEMBLIES (92196-502) 37055 Coil-Antenna coil-A-B and 31 meter band 37947 Cone-Cone

16、 complete with voice coil 37056 Coil-Antenna coil-25 meter and 19-13 5118 Plug -3 -prong male plug meter band 37950 Transformer-Output transformer. 37093 Coil-Oscillator coil-A-B-C band 35624 35625 Coil-Oscillator coil 19-13 meter band Coil-Oscillator coil-25 meter band MISCELLANEOUS ASSEMBLIES 3562

17、8 Coil-Oscillator coil-31 meter band 37057 Coil-R.F. coil-A-B and 31 meter 37953 Back-Back cover complete-less power cord . . bands 36981 Bracket-Lamp bracket 37058 Coil-R.F. coil-25 meter and 19-13 meter 32836 Cord-Power cord and plug bands 36103 Decalcomania-Ofd-Volume decal. 12714 Condenser-Air t

18、rimmer -2-12 mmfd. (C10, 37839 Decalcomania-Range switch decal C12, C15) 35392 Decalcomania-Trade mark decal 37151 Condenser-Variable tuning condenser (C6, 35391 Decalcomania-Tuning decal C13, C22) 37931 Dial-Glass dial scale 37051 Control-Volume control and power switch. 37922 Indicator-Station sel

19、ector indicator 34662 Cord-Indicator drive cord (approx. 72 in. 34570 Knob-Range switch or tone control knob overall lgth.) 34136 Knob-Tuning knob 32634 Cord-Tuning condenser drive cord (approx. 29 38326 Knob-Volume control and power switch knob. in. overall lgth.) 31480 Lamp-Dial lamp 35788 Core-Ad

20、justable core and stud fcr A -B -C - band 37966 Rail-Station selector indicator gude rail oscillator coil 4982 Spring-Retaining spring for knobs, Stock Noe. 31259 Core-Adjustable core and stud for 25 meter, 34136 and 38326 19-13 meter and 31 meter band oscillator coils . 14270 Spring-Retaining spring for knob, Stock No. 34570