RCA-Victor-Co-Inc-26X-1 电路原理图.pdf

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1、MANUAL OF 1942 MOST POPULAR SERVICE DIAGRAMS RCA ftodels 26X-1, 26X-3 Test Oscillator.For all alignment operations, keep the output as low as possible to avoid a.v.c. action. Output Meter Alignment.If this, method is used, connect the meter across the voice coil, and turn the receiver volume control

2、 to maximum. Calibration Scale.The glass tuning dial may be easily removed from the cabinet and temporarily attached to the dial backing plate for quick reference during alignment. Power Supply Polarity.For operation on d-c, the power plug must be inserted in the outlet for correct polarity. If the

3、set does not function, reverse the plug. On a c, reversal of the plug may reduce hum. Precautionary Lead Dress 1. Dress output tube plate lead to speaker and output bypass con denser away from terminal board and yellow lead in cable. 2. Dress brown and yellow leads from 2nd I.F. transformer away fro

4、m output plate and bypass condenser. 3. Dress .02 capacitor Cl2 awpy from output capacitor Cl6. 4. Dress all leads or parts as far as possible away from oscillator coil. 5. Dress lead from 03 to band switch down along front apron of chassis. 6. Dress lead from trimmer condenser on loop to S.W. Ant.

5、coil around outside of rectifier tube. Other leads between rectifier and R.F. tube. _ 0SC-I300KC1 QoSC-fcOOXC_ - czzCroB I5MC. CZ6,C29,-45gtC. trams. Connect high side of the test oscillator to I.F. grid - in series with 0.1 mfd. 1st det. grid in series with 0.1 mfd. R.F. grid in series with 0.1 mfd

6、. Ant. terminal in series with 47 mmf. (link open) Ant. terminal in series with 220 mmf, (link open) Turn radio dial to Quiet Point at 1,700 kc end of dial _ 15 me 15 me “C Band ft e 9*5 me 9.5 me .c. Band Repeat steps 4 and 5. 1,300 kc “A”Band 600 kc “A”Band Repeat steps 7 and 8. Adjust the follow-

7、 C30, C31 2nd I-F trans. C-28, C-29 1st I-F trans. C-27* Wave trap C-24 (osc.)* C-22 (ant.) L-10 (osc.) L.-5 (ant.) C-25 (osc.) C-23 (ant.) C-26 (osc.) *Use minimum capacity peak if two peaks can be obtained. *Adjust C-27 for minimum signal with 455 kc applied to R.F. rid. Note.Oscillator tracks 455

8、 kc above signal on all bands. JC 23-ANT. 1300KC I2SA7 l*TDET. z 3 c v iSZ IJ ro3 V F V o F o ; oA.c i wO 0.- L0m;O Ga,1n4iwX ipiF: ;Nc t W - IF8f, .;W 8 pyyjW ZZFWW z _ Z I JI ; t. , .c V ,IP_, 0.8 i Y rc gb = Zp 1mZ F oo_ C o. m $ V Z2o v IN M1 X -Nlam =i r- a,u IF -4 N ,Y u v t Vs J= Replacement

9、Parts PAGE 4i9 -C 26XI3, 26X4, RAD. 515 Insist on genuine factory -tested parts, which are readily identified and may be purchased from authorized dealers. STOCK . DESCRIPTION STOCK No. DESCRIPTION CHASSIS ASSEMBLIES CHASSIS ASSEMBLIES (26X1 RC -1014 ) (26X3 RC -1014A) (26X4 RC -1014B) 36947 Board-L

10、oop receptacle and terminal board 36947 36301 Board-Loop receptacle and terminal board Capacitor-Electrolyticp150voltscomprising 1 section f 36301 Capacitor-Electrolytic comprising 1 section of 30 y p 8 mfd., 150 volts and 1 section of 50 mfd., 150 15 mfd., 150 and 1 of 50 mfd., 150 volts volts 3735

11、9 Capacitor-Comprising 1 section of .005 mfd. and 37359 Capacitor-Comprising 1 section of .005 mfd. and 1 section of .0003 mfd. 1 section of .0003 mid. 38691 Capacitor-Adjustable capacitor -55-75 mmfd. 38691 Capacitor-Adjustable capacitor -55-75 mmfd. (C24) (C24) 38692 Capacitor-Adjustable capacitor

12、 -90-110 mmfd. 38692 Capacitor-Adjustable capacitor -90-110 mmfd. (C22) (C22) 38693 Capacitor-Adjustable capacitor-comprising 1 38693 Capacitor-Adjustable capacitor-comprising 1 section of 8-75 mmfd., 1 section of 48-600 mmfd., and 1 section of 5-30 mmfd. (C27, C28, C25) 39327 section of 8-75 mmfd.,

13、 1 section of 48-600 mmfd., and 1 section of 5-30 mmfd. (C27, C26, C25) Capacitor -2-20 mmfd. (C23) 39327 Capacitor -2-20 mmf. (C23) 38726 Capacitor-Mica trimmer comprising 1 section of 12948 Capacitor -33 mmfd. 10-160 mmfd., 2 sections of 25-250 mmfd., 1 12725 Capacitor -150 mmfd. section of 50-400

14、 mmfd., and 1 section of 100- 12694 Capacitor -220 mmfd. 540 mmfd. 34506 Capacitor-.0018 mfd. 12948 Capacitor -33 mmfd. 4937 Capacitor-.01 mfd. 39540 Capacitor -51 mmfd. 11315 Capacitor-.015 mfd. 12725 Capacitor -150 mmfd. 36248 Capacitor-.02 mfd. 12694 Capacitor -220 mmfd. 5196 Capacitor-.035 mfd.

15、30433 Capacitor -470 mmfd. 32787 Capacitor-.05 mfd. 34506 Capacitor-.0018 mfd. 4839 Capacitor -0.1 mfd. 4937 Capacitor-.01 mfd. 34505 Capacitor -0.2 mfd. 11315 Capacitor-.015 mfd. 38686 Coil-Antenna coil 36248 Capacitor-.02 mfd. 38690 Coil-Filter coil 5196 Capacitor-.035 mfd. 35096 Coil-Loop primary

16、 coil 32787 Capacitor-.05 mfd. 38685 Coil-Oscillator coil 4839 Capacitor -0.1 mfd. 38689 Condenser-Variable tuning condenser 34505 Capacitor -0.2 mfd. 38410 Control-Volume control and power switch 38813 Coil-Antenna coil 32634 Cord-Drive cord (approx. 50 -in. overall length) . 38690 Coil-Filter coil

17、 38694 Core-Adjustable core and stud for antenna and 35096 Coil-Loop primary coil oscillator coils 38685 Coil-Oscillator coil 36237 Drum-Drive Drum 37638 Coil-P.B. oscillator coil -540-1,100 K.0 .37068 Indicator-Station selector indicator 35803 Coil-P. B. oscillator coil -610-1,250 K.C. 11765 Lamp-D

18、ial lamp 38772 Coil-P.B. oscillator co.l-750-1,420 K.C. . 31193 Lead-Antenna lead 38773 Coil-P.B. oscillator coil -950-1,560 K.0 38769 Loop-Antenna loop 38689 Condenser-Variable tuning condenser 38767 Plate -Dial back plate complete with pulleys- 38410 Control-Volume control and power switch less di

19、al 34662 Cord-Drive cord (approx. 54 -in. overall length) 36230 Pulley-Drive cord pulley 38694 Core-Adjustable core and stud for antenna and 30189 Resistor -120 ohms, watt oscillator coils 12267 Resistor -1,200 ohms, watt 35871 Core-Adjustable core and stud for P.B. oscill- 6134 Resistor -1,200 ohms

20、, 1 watt ato36237 Drum-Driverr s drum 34767 Resistor -2,200 ohms, watt 37068 Indicator-Station selector indicator 3078 Resistor -10,000 ohms, i watt 11765 Lamp-Dial lamp 30492 Resistor -22,000 ohms, .4. watt 31193 Lead-Antenna lead 30650 14583 Resistor -56,000 ohms, watt Resistor -220,000 ohms, watt

21、 38770 Loop-Antenna loop 30648 Resistor -470,000 ohms, watt 38768 Plate-Dial back plate complete with pulleys - 30649 Resistor -272 meg., watt less dial 30271 Resistor -4.7 meg., 3 watt 36230 Pulley-Drive cord pulley 38785 Resistor -15 meg., watt 30189 Resistor -120 ohms, watt 36897 Shaft-Tuning kno

22、b shaft 12267 Resistor -1,200 ohms, watt 34449 Socket-Dial lamp socket 6134 Resistor -1,200 ohms, 1 watt 37605 Socket-Tube socket-moulded type 34767 Resistor -2,200 ohms, watt 31251 Socket-Tube socket-wafer type 30492 Resistor -22,000 ohms, watt 31418 Spring-Drive cord spring 30650 Resistor -56,000

23、ohms, watt 120017 Spring-Retaining spring for core and stud 14583 Resistor -220,000 ohms, watt 38687 Switch-Range switch 30648 Resistor -470,000 ohms, watt 36232 Transformer-First I.F. transformer 30649 Resistor -2.2 meg., watt 36233 Transformer-Second I.F. transformer.:. 30271 Resistor -4.7 meg., w

24、att 36800 Transformer-Output transformer (for RL -81-B2) 38785 Resistor -15 meg., i watt 38994 Transformer-Output transformer (for RL -88-B1) 36897 Shaft-Tuning knob shaft 33726 Washer-C washer for tuning shaft 34449 Socket-Dial lamp socket 37805 Socket-Tube socket-moulded type PM SPEAKER ASSEMBLIES

25、 31251 Socket-Tube socket-wafer type (RL -81B-2) 31418 Spring-Drive cord spring 12007 Spring-Retaining spring for core and stud 35570 Cone-Cone complete with voice coil 38688 Switch-Range switch 38771 Switch-Selector switch SPEAKER ASSEMBLIES 36232 Transformer-First I.F. transformer (EM RL -86-B1) 3

26、6233 Transformer-Second I.F. transformer 36800 Transformer-Output transformer (for RL -81-B2) 32907 Cap-Dust cap 38994 Transformer-Output transformer (for RL -86-B1) 39448 Coil-Field coil, 350e ohms 33726 Washer-C washer for tuning shaft 39447 Cone-Cone complete with voice coil MISCELLANEOUS ASSEMBL

27、IES MISCELLANEOUS ASSEMBLIES 39067 Back-Cabinet back 38695 Back-Cabinet back for Model 26X1 38375 Button-Push button 38993 Back-Cabinet back for Model 26X3 36873 Clamp-Dial clamp Y947 Cabinet-Moulded cabinet for Model 28X1 38814 Decalcomania-Control panel decal 36873 Clamp-Dial clamp for Models 26X3

28、 38840 Dial-Glass dial scale 38890 Clamp-L.H. dial clamp for Model 26X1 38376 Escutcheon-Push button escutcheon 38891 Clamp-R.H. dial clamp for Model 28X1 37831 Fastener-Push-on fastener for back 38874 Decalcomania-Control panel decal for Model 36886 Knob-Range switch knob 26X3 36722 Knob-Control kn

29、ob (volume or tuning) 38839 Dial-Glass dial scale 34317 Marker-Station selector marker 37831 Fastener-Push-on fastener for back 30900 Spring-Retaining spring for knobs 36722 Knob-Control knob (tuning, volume, or range) for 26X1, or.volume or tuning knob for 26X3. 34053 Spring-Retaining spring for pu

30、sh buttons 38888 Knob-Range switch knob for 28X3 30900 Spring-Retaining spring for knobs PAGE 420-0 26X1,-3, 26X14, RAD . 515 OUTPUT TUBE REGT. TUBE re OUTPUT TRANS. VCOI LOIC E CHASSIS GND. BLUE 4-100 V. 30 M L,J l SC FD. I 1 MFO CONNECTIONS roR PERMANENT-MAGNET SPEAKER OUTPUT TUBE REGT. TUBE MED.

31、OUTPUT TRANS. CHASSIS &ND. D. t 85 v. CONNECTIONS FOR ELECTRO- MAGNET SPEAKER MODELS 26X1,-3, - 4. SUBSTI t UTE SPEAKERS In 1st production of the following models, the speaker is RL -81-B2. In later production, several substitute speakers are used, as listed below. WHEN ORDERING REPLACEMENT PARTS FO

32、R SPEAKERS, NOTE THE IDENTIFICATION NUMBER STAMPED ON THE SPEAKER FRAME. IF THE. NUMBER STAMPED ON THE SPEAKER, DOES NOT APPEAR IN THE FOLLOW- ING LIST, ORDER THE REQUIRED PART BY DESCRIPTION, AND SPECIFY THE IDENTIFYING NUMBER STAMPED ON Ti-IE SPEAKER AND THE RE- CEIVER MODEL. NUMBER. Alternate EM

33、and PM speaker connec- tions are shown in the accompanying diagrams. NUMBER STAMPED ON SPEAKER CONE AND VOICE COIL STOCK . No. FIELD COIL STOCK No. RL -86-A3 35570 39543 RL -86-B1 39447 39448 RL -86-B4 39447 39448 92161-3 38352 PM 92161-4 39535 PM 92161-5 38352 PM 92322-2 39536 PM 92374-1 39537 PM 9

34、2374-I 92161-4 Identifying Sketches of Five PM Speakers. RADIOLA 515 Replacement Parts Insist on genuine factory-ledd part, which are readily identified and may be purchased from authorized aealers. STOCK No. DESCRIPTION STOCK DESCRIPTION EM SPEAKER ASSEMBLIES CHASSIS ASSEMBLIES (RL -86-B1) MODEL 51

35、5A RC1014A 32907 Cap-Dust cap 39448 Coil-Field coil, 350 ohms Same as 28 % 3 RC1014A 39447 Cone-Cone complete with voice coil EXCEPT MISCELLANEOUS ASSEMBLIES 35998 Capacitor - 3-30 mint (C23) 39893 Back - Cabinet back. 13141 Capacitor - 47 1135f (C4) 36873 Clamp - Dial clamp. 38894 Core - Adjustable

36、 core and stud for oscil- 38874 Decalcomania - Control panel decal. lator coil. 39045 Dial - Glass dial scale. DELETE 37831 38541 Fastener - Push-on fastener for back. Knob - Volume or tuning knob. 39237 Capacitor -2-20 Irunfd C23) ( 37388 11349 Knob - Range switch knob. Spring - Retaining spring for knobs. 8134 Resistor - 1200 ohms (R12) 36800 Transformer - output transformer.