RCA-Victor-Co-Inc-34X 电路原理图.pdf

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1、52 (REAR VIEW) SHOWN IN BROADCAST POSITION CHASSIS COMMON WIRING GROUND INSULATED FROM CHASSIS VOLTAGES SHOULO HOLD W|THIN *. 207. WITH 117 V. AC SUPPLY. m MEASURED WITH CHANALYST OR VoLTOHMYST 50L6GT I* SAT I2SK7 I2S07 Alignment Procedure Output Meter Alignment.If this method is used connect the me

2、ter across the voice coil and turn the receiver volume control to maximum. Electronic Voltmeter.The electronic voltmeter in the Chanalyst or VoltOhmyst provides an unexcelled output indi cator. It should be connected to the AVC bus. Test Oscillator.Connect the low side of the test oscillator to the

3、receiver chassis through a .01 mfd. capacitor. When the electronic voltmeter is used as an alignment indicator the output of the test oscillator should be adjusted to produce several volts of AVC. With the output meter alignment method the test oscillator output should be kept as low as possible. Po

4、wer-Supply Polarity.For operation on d-c, the power plug must be inserted in the outlet for correct polarity. If the set does not function, reverse the plug. On a-c, reversal of the plug may reduce hum. * It is recommended that this step be repeated uainf a received station of known frequency. * Use

5、 minimum capacity if two peaks can be obtained. cimk. cn-ooc. Connect the high side of test- oscillator to Tune test-osc. Turn radio dial Adjust the fol lowing for max. peak output 12SK7 grid in series with 0.1 mfd. 12SA7 grid in series with 0.1 mfd. 455 kc Quiet Point at 1.600 kc end of dial CIO, C

6、9 2nd I-P Transformer C8, C7 1st I-F Transformer Antenna term, in series with 47 mmf. 10 me* 10 me C21 (osc.)* C23 (ant.) Antenna term, in series with 200 mxnfd. 1,600 kc 1,600 kc C14 (oac.) Radiation Loop 1,300 kc Resonance on Signal C16 (ant.) Radiation Loop 600 kc 600 kc C22 Osc. Rock in 34 X 收音机

7、爱 好者资料库 RadioFans.CN PAGE 324-C MODELS 14AX, 14AX2, 14X, 14X2 R2 3.3 MEG VOL. CONTR. 500,0004 STOP AT 50,000 IL L -1IG12 -Z 120 2 II IC18 .01 PHONO JAC K C2 .1 C25 Ttoo (52 REARVIEW) SHOWN IN BROADCAST POSITION _L - 3V BIAS FOR I + GAIN DATA 1 /477 CHASS I s GROUND 1 SO L GT OUT PUT IC5 -.02 1v .Z O

8、. R4 2 250 co 125 470,000 R3 4.7 MEG. 1 COMMON WIRING INSULATED FROM CHASSIS VOLTAGES SHOULD HOLD WITNIN 2 20% WITH 117 V. AC SUPPLY Mt MEASURED WITH CHANALYST OR VOLTOHMYST 117V /IC -DC. 35Z5 ST RECT. 51 FIELD C6 .05 1110Q00 C16 + 350 er 30 50 MFD. 450 Jti Mf D. L17 + 351 SGT 4 1 2 3 Nt 5 N1 20-4 B

9、 5C 101501E) 收音机爱 好者资料库 RadioFans.CN PAGE 326-C I4AX, I4AX2, I4X, 14X2, 34X, 526, 527 Output Meter Alignment.-If this method is used connect the meter across the voice coil and turn the receiver volume control to maximum. Electronic Voltmeter.-The electronic voltmeter in the Chanalyst or VoltOhmyst

10、provides an unexcelled output indicator. It should be connected to the AVC bus. Test Oscillator.-Connect the low side of the test oscillator to the receiver chassis through a .01 mfd. capacitor. When the electronic voltmeter is used as an alignment indicator the output of the test oscillator should

11、be adjusted to produce several volts of AVC. With the output meter alignment method the test oscillator output should be kept as low as possible. Calibration Scale.-The glass tuning dial may be easily removed from the cabinet and temporarily attached to the dial backing plate for quick reference dur

12、ing alignment. Precautionary Lead Dress.- I. Dress the power cable to switch on the volume, control close to the chassis and away from all grid and diode leads and condensers. 7. Dress capacitors in the I2SQ7 grid circuit away from all wiring. 3. Green and black phono wires should be twisted and dre

13、ssed away from other parts and leads. 4. 50L6 -GT filament wires should be dressed to rear of chassis and away from the second 1-F transformer leads. 5. Dress brown lead from second 1-F transformer to I2SQ7 away from power cable. 6. Dress wire to No. I grid of the 12SA7 away from pilot lamp leads. 7

14、. Dress wire from loop to variable condenser away from chassis. 8. Dress all capacitors, leads, etc. which come close to oscillator coil rigidly and as far as possible from it. Alignment Procedure Steps Connect the high side of test- oscillator to- Tune test-osC. to- Turn radio dial to- Adjust the f

15、ol - lowing for max. peak output- 1 12SK7 grid in series with 0.1 mfd. 455 kc Quiet Point at 1,600 kc end of dial C10, C9 2nd I -F Transformer 2 12SA7 grid in series with 0.1 mf d. C8, C7 1st I -F Transformer 3 Antenna term. in series with 47 mmf. 10 mc* 10 me C21 (osc.)* C23 (ant.) 4 Antenna term.

16、in series with 200 mmfd. 1,600 kc 1,600 kc C14 (osc.) 5 Radiation Loopon 1,300 kc Resonance Signal C15 (ant.) 6 Radiation LoopRock 600 kc 600 kc C22 Osc. in * It is recommended that this step be repeated using a received station of known frequency. * Use minimum capacity if two peaks can be obtained

17、. Power -Supply Polarity.-For operation on d -c, the power plug must be inserted in the outlet for correct polarity. If the set does not function. r,sur,e the plug. On :r. reversal of the plug may reduce hunt. Replacement Parts MODEL 14X SERIES Insist on genuine factory -tested parts, which arc read

18、ily identified and may be purchased from authorized deaden. STOCK DESCRIPTION STOCK DESCRIPTION ASSEMBLIES 30271 Resistor -4.7 meg. * watt Model 14AX (RC -1001E) 37352 Shaft-Tuning knob shaft 34449 Socket-Dial lamp socket 37961 Capacitor-Mica trimmer -180-250 mmfd. for 31251 Socket-Tube socket - ant

19、enna coil 31418 Spring-Drive cord spring 37904 Capacitor-Mica trimmer comprising 1 section of 300-800 mmfd. and 1 section of 200-280 35098 Spring-Spring to hold I.F. transformer in shield can mmfd. 37903 Switch-Range switch 37359 Capacitor -1 section of .005 mfd. and 1 section 36232 Transformer-Firs

20、t I.F. transformer of 300 mmfd. 36233 Transformer-Second I.F. transformer - less 14393 Capacitor-.01 mfd shield can 11315 Capacitor-.015 mfd. 36800 Transformer-Output transformer 30938 Capacitor-.025 mfd. - 33726 Washer-C washer for tuning knob shaft 5196 Capacitor-.035 mfd. 32787 Capacitor-.05 mfd.

21、 4839 Capacitor -0.1 mfd. SPEAKER ASSEMBLIES 34505 Capacitor -0.2 mfd. (RL -8182) 36301 Capacitor-Electrolytic comprising 1 section of 50 mfd. 150 volts, and 1 section of 30 mfd. 35570 Cone-Cone complete with voice coil 150 volts 37012 Speaker -5 -inch permanent magnet speaker com- 3796(T Coil-Anten

22、na coil-less mica trimmer plete with cone and voice coil-less output 37959 Coil-Oscillator coil . transformer 37962 Coil-Loop primary coil 37901 Condenser-Variable tuning condenser 36584 Control-Volume control and power switch MISCELLANEOUS ASSEMBLIES 32634 Cord-Drive cord (approx. 33 -in. overall l

23、gth.) 37068 Indicator-Station selector indicator 37906 Back-Cabinet back cover 31193 Lead-Antenna lead 37362 Clamp-Dial clamp 37902 Loop-Antenna loop 37910 Dial-Glass dial scale 37351 Plate-Dial back plate complete with pulleys. 37831 Fastener-Push-on fastener for cabinet back 36230 Pulley-Drive cor

24、d pulley 37361 Knob-Walnut tuning or volume control knob. 37355 Receptacle-Receptacle and terminal board. 35121 Knob-Walnut range switch knob 30189 Resistor -120 ohms, watt 11765 Lamp-Dial lamp 12267 Resistor -1,200 ohms, watt 37909 Mounting-Handle mounting hardware including 13998 Resistor -22,000

25、ohms, watt 2 screws, 2 washers, 2 springs, and 2 felt 12264 Resistor -220,000 ohms, watt washers 30648 Resistor -470,000 ohms, watt 3-0900 Spring-Retaining spring for knobs, Stock No. 12928 Resistor -3.3 meg., watt 37361 14AX2 (RC -1001E) Service Data: The Service Data for Model 14AX applies to Mode

26、l 14AX2, except for the following parts used in 14AX2: Stock No. 86801 Coil-Oscillator coil. 37363 Condenser-Variable tuning condenser 38816 Back-Cabinet back Y1140 Cabinet 35071 Knob-Control knob RL -86-A3 EM speaker is used in some production of 14AX2, as specified elsewhere 14X (RC -1001D) Servic

27、e Data: The Service Data for Model 14AX applies to Model 14. X except for the following parts used in 14. X : Stock No. Omit 34505 Capacitor -.0,2 mfd 35121 Knob Add 35392 Decal - Trademark decal 32895 Kncb - Walnut range switch knob 14X2 (RC -1001D) Service Data : The Service Data for Model 14X app

28、lies t Model 14X2, except for the following parts uso: in 14X2: Stock No. 38816 Back-Cabinet back. Y1140 Cabinet 35071 Knob-Control knob RL -86-A3 EM speaker is used in s, to production of 14X2, as specified elsewhere PAGE 327-C I4AX, I4AX2, 14X, 1412, 34X, 526, 527 Replacement Parts Insist on genui

29、ne factory -tested parts, which are readily Identified and may be purchased from authorized dealen STOCK No. DESCRIPTION STOCK No. DESCRIPTION CHASSIS ASSEMBLIES (RC -1001E) 37961 Capacitor-Mica trimmer -180-250 mmfd. for antenna coil 37904 Capacitor-Mica trimmer comprising 1 section of 300-800 mmfd

30、., and 1 section of 200-280 mmfd 37359 Capacitor-Comprising 1 section of .005 mfd , and 1 section of 300 mmfd. 14393 Capacitor-.01 mfd. 11315 Capacitor-.015 mfd. 4870 Capacitor-.025 mfd. 5196 Capacitor-.035 mfd. 32787 Capacitor-.05 mfd. 4839 Capacitor -0.1 mfd. 34505 Capacitor -0.2 mfd. 36301 Capaci

31、tor-Electrolytic comprising 1 section of 50 mfd., 150 volts, and 1 section of 30 mfd , 150 volts 37960 Coil-Antenna coil-less mica trimmer 37959 Coil-Oscillator coil 37962 Coil-Loop primary coil 37901 Condenser-Variable tuning condenser 36584 Control-Volume control and power switch 32634 Cord-Drive

32、cord (approx. 33 -in. overall lgth.) 37068 Indicator-Station selector indicator 31193 Lead-Antenna lead 37902 Loop-Antenna loop 37351 Plate-Dial back plate complete with pulleys. 36230 Pulley-Drive cord pulley 37355 Receptacle-Receptacle and terminal board 30189 Resistor -120 ohms, watt 30492 Resist

33、or -22,000 ohms, watt 14583 Resistor -220,000 ohms, watt 30648 Resistor -470,000 ohms, watt 12928 Resistor -3.3 meg., watt 30271 37352 34449 31251 31418 35098 37903 36232 36233 38994 33726 32907 39448 39447 Resistor -4.7 meg., i watt Shaft-Tuning knob shaft Socket-Dial lamp socket Socket-Tube socket

34、 Spring-Drive cord spring Spring-Spring to hold I.F. transformer in shield can Switch-Range switch Transformer-First I.F. transformer Transformer - Second I.F. transformer - less shield can Transformer-Output transformer Washer-C washer for tuning knob shaft SPEAKER ASSEMBLIES (RL -86B-1) Cap-Dust c

35、ap Coil-Field coil -350 ohms Cone-Cone complete with voice coil Insist on genuine factory -tested 39776 39779 330Q6 35179 36722 11765 30900 NOTE: If the stamping on speaker in instru- ment does not agree with above speaker number, order replacement parts by re- ferring to model number of instrument,

36、 number stamped on speaker, and full description of part required. MISCELLANEOUS ASSEMBLIES Back-Cabinet back Dial-Glass dial scale Feet-Rubber feet-Pkg. of 4 Knob-Range switch knob Knob-Tuning or- volume control knob Lamp-Dial lamp Spring-Retaining spring for knobs 34X -2ND PROD. (RC -1022) Service

37、 Data: e .,r re lilac colellt parts list, refer to the Ser - rice utes for 34X (RC -1001-E) with the ex- ception ut the following parts used in the 34X- 211 Production (RC -1022): Stock No. Description 35:148 Capacitor-Electrolytic, com- prising 1 Section of 20 mfd., 150 volts (C17), and I section o

38、f :311 mfd., 1511 volts (C16) 12723 Capacitor -56 mind. :19628 Capacitor -100 mint. 3)i248 Capacitor-.112 mid. 34298 Cgpacitor-0.I 34662 Critd-Drive curd (approx. 33 -in. overall length) 35078 Knob-Range switch knob 39822 Loop-Antenna loop :11251 Socket-Tube socket-wafer 37605 Socket - Tube socket-

39、moulded :17:164 Transformer - Second I. F. transformer SPEAKER ASSEMBLIES L- 868-1 & RL -86B-4) 329117 Cap-Dust cap :19448 Coil-Field coil -3511 ohms :1)1447 Cone-Cone complete with voice coil (92379-1) 39993 (oil-Field coil -350 ohms. :19994 Cone-Cone complete with voice coil Replacement Parts RADI

40、OLA .526 & 527 parts, which are readily identified and may be purchased from authorized dealers. STOCK No. DESCRIPTION STOCK N DESCRIPTION CHASSIS ASSEMBLIES 30648 Resistor -470,000 ohms, watt (RC -1001E) 12928 Resistor -3.3 meg., watt 30271 Resistor -4.7 meg., watt 37961 Capacitor-Mica trimmer -180

41、-250 mmfd. for an- 37352 Shaft-Tuning knob shaft tenna coil 34449 Socket-Dial lamp socket 37904 Capacitor-Mica trimmer comprising 1 section of 31251 Socket-Tube socket 300-800 mmfd. and 1 section of 150-200 mmfd. 31418 Spring-Drive cord spring 37359 Capacitor -1 section of .005 mfd. and 1 section of

42、 300 mmfd. 35098 Spring-Spring to hold 1.F. transformer in shield can 14393 Capacitor-.01 mfd. 37903 Switch-Range switch 36248 Capacitor-.02 mfd. 36232 Transformer-First I.F. transformer 5196 Capacitor-.035 mfd. 36233 Transformer-Second I.F. transformer-less shield 32787 Capacitor-.05 mfd. can 4839

43、Capacitor -0.1 mfd. 38994 Transformer-Output transformer 36301 Capacitor-Electrolytic comprising 1 section of 50 mfd., 150 volts, and 1 section of 30 mfd., 150 volts 33726 Washer-C washer for tuning knob shaft SPEAKER ASSEMBLIES 37960 Coil-Antenna coil-less mica trimmer 37959 Coil-Oscillator coil (R

44、L86A3) 37962 Coil-Loop primary coil 37901 Condenser-Variable tuning condenser 35570 Cone-Cone complete with voice coil 36584 Control-Volume control and power swatch 39543 Field Coil 32634 Cord-Drive cord (approx. 33 -in. overall length) MISCELLANEOUS ASSEMBLIES 37068 Indicator-Station selector indic

45、ator 31193 Lead-Antenna lead 37906 Back-Back cover for Model 526 37902 Loop-Antenna loop 39454 Back-Cabinet back for Model 527 37351 Plate-Dial back plate complete with pulleys. 37362 Clamp-Dial clamp 36230 Pulley-Drive cord pulley 38812 Dial-Glass dial scale 37355 Receptacle-Receptacle and terminal

46、 board 37831 Fastener-Push fastener for cabinet back 30189 Resistor -120 ohms, watt 39004 Handle-Carrying handle for cabinet 12267 Resistor -1,200 ohms, watt 38810 Knob -Control kob 30492 Resistor -22,000 ohms, watt 11765 Lamp-Dial lamp 14583 Resistor -220,000 ohms, watt 14270 Spring-Retaining spring for knob