RCA-Victor-Co-Inc-RC-405C 电路原理图.pdf

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1、收音机爱 好者资料库 RadioFans.CN MANUAL OF 1940 MOST POPULAR SERVICE DIAGRAMS Models 40X-30 and 40X-31 (Chassis No. RC405C watt (RC -435) 12679 Resistor -2.2 meg. watt 13601 Resistor -10 meg. j watt 32968 Capacitor -2 gang variable tuning 33293 Shaft-Tuning knob shaft and bushing 13057 Capacitor -60 mmfd. 33

2、557 Socket-Dial Light 12488 Capacitor -250 mmfd. 32537 Socket-Tube Socket 12952 Capacitor -300 mmfd. 31615 Spring-Drive cord tension spring 4838 Capacitor-.005 mfd. 33296 Spring-Drum retaining spring 32787 Capacitor-.05 mfd. 32966 Transformer-I. F. Input 4839 Capacitor-.1 mfd. 32967 Transformer-I. F

3、. Output 12484 32576 Capacitor-.25 mfd. Capacitor-Electrolytic 20-12 mfd. 33291 Volume Control 32962 32634 Coil-Oscillator coil Cord-Drive cord SPEAKER ASSEMBLIES 33662 Drum-Drive cord and indicator drum (Speaker No. 39105-21 33295 Indicator-Dial pointer 30460 Lamp-Pilot Lamp 34569 Speaker-Complete-

4、less transformer 33663 Loop-Antenna loop 33294 Pulley-Drive cord pulley 33741 Transformer-Output 33558 13428 Resistor -86 ohms Resistor -150 ohms, watt MISCELLANEOUS ASSEMBLIES 14561 Resistor -220 ohms, I. watt 33289 Dial-Dial Scale 13998 Resistor -22,000 ohms, I watt 33006 Foot-Rubber foot for 1273

5、8 Resistor -27,000 ohms, watt 32571 ,cabinet Knob-Tuning or volurde control knob 12264 Resistor -220,000 ohms, I. watt 33742 Socket-Phonograph input socket LAGE 245-C 9TX 50, 40X30, 4001, 40X5O SERIES Replacement Parts MODELS 40X-30, 40X-31 Insist on genuine Factory -tested parts, which are readily

6、identified and may be purchased From authorized dealers. STOoCK N DESCRIPTION STOCK ON K DESCRIPTION CHASSIS ASSEMBLIES 12264 12285 Resistor -220.000 ohms, 4 watt Resistor -470,000 ohms, 4 watt 13057 Capacitor -60 mmfd. 12679 Resistor -2.2 rneg., 4 watt 12488 Capacitor -250 mmfd. 13601 Resistor -10

7、meg., 4 watt 12952 Capacitor -300 mmfd. 32945 Shaft-Tuning knob shaft and bearing 4838 Capacitor-.005 mfd. 33742 Socket-Phonograph input socket 4937 Capacitor-.01 mfd. 33557 Socket-Pilot lamp socket 4870 Capacitor-.025 mfd. 32537 Socket-Tube socket 32787 Capacitor-.05 mfd. 30585 Spring-Tuning conden

8、ser drive cord spring. 4839 Capacitor -0.1 mfd. 32966 Transformer-First i -f transformer 12484 Capacitor-.25 mfd. 32967 Transformer-Second i -f transformer 32576 Capacitor-Electrolytic, one section 20 mid., one section 12 mfd. SPEAKER ASSEMBLIES 39105-2 34259 Coil-Oscillator coil 32968 Condenser-Var

9、iable tuning condenser 32964 Transformer-Output transformer 32578 Control-Volume control and power switch 32634 Cord-Drive cord MISCELLANEOUS ASSEMBLIES 32946 Drum-Variable condenser drive drum and indi- cator disc 32942 Dial-Glass dial scale 11765 Lamp-Pilot lamp 32447 Knob-Ivory tuning, volume and

10、 power knob 33807 Loop-Antenna loop for 40X30 Model 40X31 33808 Loop-Antenna loop tor 40X31 32571 Knob-Tan tuning, volume and power knob 33558 Resistor-Series resistor -86 ohms Model 40X30 13428 Resistor -150 ohms, 4 watt 32943 Nut-Speed nut to fasten dial 14561 Resistor -220 ohms 4 watt 13998 Resis

11、tor -22,000 ohms, 4 watt 12412 Resistor -47,000 ohms, 4 watt Burnt -Out I -F Transformer: A few cases have been reported in Models 40X-30, -31 where the secondary of the 1st I -F transformer has burned out. Investigation ,showed that this was caused by a combination of two things: (a) The low ends o

12、f the primary and secondary of the loop antenna were reversed, so that the low -end of the primary was connected to the AVC bus. (b) A grounded antenna lead was connected to the antenna terminal on the back of the receiver. This placed 110 volts on the grid of the I -F tube, drawing sufficient curre

13、nt to burn aut the secondary of the 1st I -F transformer, and also the IF bias resistor. The remedy is to re -wire the loop antenna correctly as shown in the Service Data. The low -end of the primary should be connected through the .1 mfd. capacitor to chassis, and the low -end of the secondary shou

14、ld be con- nected to the AVC bus. MODELS 40X-30, 40X-31, 40X-50 Additional Replacement Part: Stock No. 11315 Capacitor-.015 mfd. (output tube plate by-pass in sonie production of Model 40X-50) 11765 Lamp-Dial lamp 34569 Speaker-Complefe-less transformer Replacement Parts MODELS 40X-50 Insist on genu

15、ine Factory -tested parts, which are readily identified and may be purchased From authorized dealers. STOCK No. DESCRIPTION STOCK DESCRIPTION CHASSIS ASSEMBLIES 30585 Spring-Drive cord spring (RC -436) 33557 Socket-Dial light socket 33745 Cable-Phono. cable 32537 Socket-Tube socket 13057 Capacitor -

16、60 mmfd. 32966 Transformer-I-F input transformer 12488 Capacitor -250 mmfd. 32967 Transformer-I-F output transformer 12952 Capacitor -300 mmfd. 32545 Volume control 4838 Capacitor-.005 mfd. 4870 Capacitor-.025 mfd. SPEAKER ASSEMBLIES 32787 Capacitor-.05 mfd. (39105-2) 4839 Capacitor-.1 mfd. 12484 Ca

17、pacitor-.25 mfd. 32964 Transformer-Output transformer 32576 Capacitor-Electrolytic, 20-12 mfd. 32968 Capacitor-Variable tuning MISCELLANEOUS ASSEMBLIES 32962 Coil-Oscillator coil 33744 Dial-Glass dial scale 32634 Cord-Drive cord . 33743 Drum-Drive drum 32895 Knobs-Tuning and volume-Models 40X50, 40X

18、51, 40X52, 40X55, 40X56, 40X57 33663 Loop-Complete antenna loop (Walnut) 33558 Resistor -86 ohms 12071 Resistor -120 ohms, 4 watt 32893 Knobs-Tuning and volume-Model 40X53 13428 Resistor -150 ohms, 4 watt (Red) 14561 Resistor -220 ohms, 4 watt 13998 Resistor -22,000 ohms, 4 watt 32571 Knobs-Tuning and volume-Model 40X54 12412 Resistor -47,000 ohms, 4 watt (Tan) . 12264 Resistor -220,000 ohms, 4 watt 12285 Resistor -470,000 ohms, i watt 33742 Socket-Phonograph input socket 12679 Resistor -2.2 meg., i watt 13601 Resistor -10 meg., i watt - 33061 Shaft-Drive shaft