RCA-Victor-Co-Inc-U-43 电路原理图.pdf

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1、PAGE 384-C MODELS U-20, U-40, U-42 and U-43 Chassis No. RC -498, RC -498A, RC -498B RC -498E Seven- and Eight -Tube, Electric -Tuning, A -C, Superheterodynes U-20 LOUDSPEAKER (RL -70-K1) Diameter 12 inch A-6 105-125 volts, 60 cycles, 110 watts total Voice -Coil Impedance at 400 cycles 2.2 ohms A-5 1

2、05-125 volts, 50 cycles, 110 watts total TUBE COMPLEMENT B-2 105.125 volts, 25 cycles, 110 watts total C-6 105.130/140.160/200.250 volts, 60 cycles, (1) 6SA7 First Detector, Oscillator 110 watts total (2) 6K7 I -F Amplifier C-5 105-130/140-160/200-250 volts, 50 cycles, (3) 6SQ7 Second Det., A.V.C. (

3、4) 6SF5 Phase Inverter 110 watts total (5) 6F6G except some RC -498B use 6K6G Output 540 to 1,560 kc and 5.8 to 18 mc. (6) 6F6G except some RC -498B use 6K6G Output U-20 U-40 U-42 (7) 5Y3G in RC -498 and RC -498A Rectifier (7) 6U5 in RC -498B Tuning Eye (8) 5Y3G in RC -498B Rectifier POWER OUTPUT Un

4、distorted 5 watts, Maximum 6 watts POWER SUPPLY RATINGS (U-20) l-40 U-42 Electrical and Mechanical Specifications POWER SUPPLY RATINGS (U-40, U-42, U-43) Frequency Range Height 38 inches. 33 inches. 421/2 inches Width 251/2 inches. 30 inches.30 inches Depth 15 inches. 16% inches. 17 inches Net Weigh

5、t 64 pounds. 90 pounds. 95 pounds Shipping Weight 79 pound, 115 pounds. 120 pounds Tuning Drive Ratio , 10 to 1 PHONOGRAPH U-20 A-6 105.125 volts, 60 cycles, 110 watts total Type Manua) A-5 105.125 volts, 50 cycles, 110 watts total B-2 105.125 volts, 25 cycles, 110 watts total PIiONOGRAPII U-40, U-4

6、2 U-43 C-6 105-125/2.10-250 volts, 60 cycles, 110 watts total Type Automatic C-5 105-125/210-250 volts, 50 cycles, 110 watts total Record Capacity Eight 10 -inch or seven 12 -inch For Phonograph Service Data Refer to RP -139A, RP -145 Specifications MODEL TUBE COMPLEMENT U-43 ONLY Dimensions (1) RCA

7、-6SA7 . 1st Detector -Oscillator Height (inches) . (2) RCA -6K7 I -F Amplifier Width (inches) (3) RCA-6SQ7 2nd Detector, AVC, and A -F Depth (inches) Tuning Drive Ratio (4) RCA-6SF5 Phase Inverter Weight (5) RCA-6K6GT Power Output (6) RCA-6K6GT Power Output (7) RCA-5Y3G Rectifier (8) RCA-6U5/6G5 Tun

8、ing Indicator 1.orns PEA KER ( RL70L1) Type 12 inch electrodynamic Voice Coil Impedance at 400 cycles .2.2 ohms Cabinet . 34 . 32 . 161/4 . 10 to 1 80 lbs (net) 110 lbs. (shipping) 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 Alignment Procedure

9、 Before proceeding with alignment the following lead dress should be carefully checked. 1. Dress AC switch leads away from 6SF5 tube socket. 2. Do not twist loop leads together or around each other. Spacing between leads from C band loop to chassis is important -see alignment step 5 below. 3. High s

10、ide leads from loop sockets, range switch, oscillator coil, and trimmers must be dressed away from chassis and each other. 4. Dress C-6 and C-33 away from each other. 5. Dress C-17 away from power switch leads. Cathode -Ray Alignment is the preferable method. Con- nections for the oscillograph are s

11、hown on the chassis schematics. PAGE 365-C u-20, u-40, u-42, u-43 Output Meter Alignment.-It this method is used, connect the output meter across the voice coil, and turn the receiver volume control to maximum. Test Oscillator.-For all alignment operations, keep the oscillator output as low as possi

12、ble to avoid a -v -c action. Calibration Marks.-The tuning dial is fastened in the cabinet and can not he used for reference during alignment. Therefore calibration marks have been stamped in the plate on the front of the chassis as shown in the accompanying drawing. These mark, are used for referen

13、ce during align- ment. Dial Indicator Adjustment.-With the gang condenser in full mesh, the indicator should point to the extreme left (low frequency) mark on the dial scale. For additional details, refer to booklet RCA Victor Receiver Alignment. Steps Connect test-osc. output to- Tune test- ose. to

14、- Turn radio dial to Adjust the following for maximum peak output I -F grid through 0.1 mfd capacitor and ground 455 kc Quiet point between 1,720-1,500 kc L5 and L6 (2nd I -F trans.) 2 1st det. grid through 0.1 mfd capacitor and ground L3 and IA (1st I -F trans.) 3 15.2 me 15.2 me C-4 oscillator* 4

15、Radiation loc p consisting of two turns of wire 18 inches in diameter located 4 to 6 feet from receiver 15.2 me Rock at 15.2 me C-2 antennae while rocking 6.1 me 6.1 me Spacing between leads from C band loop to chassis 6 15.2 me Rock at 15.2 me C-2 antennae while rocking 7 1,500 kc 1,500 kcC-34 ante

16、nna C-28 oscillator 8 600 kc Rock at 600 kc L-2 oscillator while rocking 9 1,500 kc 1,500 kc C-34 antenna C-28 oscillator When making adjustments 4 to 9 inclusive the chassis must be in the cabinet, both loops connected, and all leads in their normal positions. When mounting chassis in cabinet if ca

17、libration marks on dial plate do not line up with dial scale mounted on cabinet move pointer to agree with dial scale on cabinet. * Oscillator should track on high frequency side of signal. If two peaks are obtained use high frequency (minimum capacity) peak. t If two peaks can be obtained use low f

18、requency (maximum capacity) peak. TUNING Six CONTROL J SN-I000 -0 U20, U40 3 2 010 U AO OGI 2o DET., A.F. o-ibell VOL.CONTR. /INVERTER / OUTPUT e OUTPUT Ti RECT. 7 -, L341J C2 C28 L2 I PHONO JACK 15OOKC 15.2MC 1500KC 600NC TELEVISION JACK TUNING SI CONTROL SN -1001-0 U-42 -71 TUNING EYE C LOOP C1 L3

19、 -BOTTOM L4 -TOP 455KC ALOOP t I / - Iifsi LF. TRANS S2 S4 sT D ET. U-40, U-42) C12) 31048 Plug -Phono plug for pickup lead (Model U-20) 34719 Transformer -2nd i.f. transformer (L5, L8, C14, 34869 Pull -Door pull (Model U-42) C15) . . 35172 32870 Rubber -S r doors Screen-Compartmenge t lampstp foscr

20、een (Models 33726 Washer-Retainingwasher for shaft, Stock No. 31364 ) U-40,ketDialU-4 lamp Socket -Dial lamp socktt (Model U-42) 34411 14270 Spring -Retaining spring for knob, Stock No 33434 PICKUP AND ARM ASSEMBLIES U-20 31470 Spring-Motorboard spring mounting hardware. -42) Uprin 33906 33908 Arm-P

21、ickuparm-shell only30900 Base-Pickupsupport arm base and retainer. aininU-40, Spring -Retaining P B -Retaining spring for button, Stock No. 33731 33905 Crystal -Pickup rystal-Pickup crystal cartridge 34423 Support -Lid support (Model U-20) 3$907 Support -Pickup support arm complete -less base 34422

22、Turntable -Phonograph turntable less spindle _(Model Jj-20 ) PAP, 39 i-C u-20, U-40, u-42, U-43 Adjustments for The push -buttons should be adjusted for six favorite sta tions after the receiver has been operating for a brief warm- up period. Each button may be set up to any standard broad- cast sta

23、tion. The preferable arrangement is to adjust for stations in the order of frequency, from low to high. Proceed as follows: 1. Pull off the push -buttons and loosen the push-button rods with a small screwdriver. 2. Set the radio -phono switch to radio position and accurately tune in the station for

24、which the first button is to be set. MODEL U-20 Additional Replacement Parts: Stock No. 11703 Lamp-Dial lamp 1703 Receptacle-Needle card holder 33395 Resistor -15,000 ohms, 3 watts (R2) :10585 Spring-Drive cord spring :472:1 Socket -3 -contact socket for loop :14261 Transformer -Power transformer, 1

25、05-120 volts, 50-60 cycles Add the following for 50 cycle, 105-125 volt motor for Model U-20: Saune as used for 105-125 volt, 60 . cycle motor, except less 34514 cover, 34516 motor ever, and 34412 armature, and add: :15605 Armature - Complete for 105-126 volt, 50 cycle motor 35604 Motor -105-125 vol

26、t, 50 cycle phono motor, less pulleys, capacitor, and motor cradle Push -Button Tuning 3. Press in push-button rod No. 1 (left) with the screw- driver, as far as it will go without undue pressure, hold in, retune station with manual control if necessary for best recep- tion, and then carefully tight

27、en up the rod. Do not tighten more than 1/4 turn fter the rod begins to grip or damage to the mechanism may result. 4. Replace the push-button on its shaft. 5. Proceed in a similar manner for the remainder of the push -buttons. 6. Insert the station marker tabs in the recesses above the push -button

28、s. MODEL U-40 Additional Replacement Parts: Stock No. 11765 Lamp-Dial lamp :38973 Markers-Station markers 11761 Receptacle-Needle card holder :t5595 Resistor -15,000 ohms, 3 watts (R2) :4723 Socket -3 -contact socket for loop :10585 Spring-Drive cord spring 31478 Support-Lid support :14261 Transform

29、er -Power transformer 105-120 volts, 50-60 cycles 31445 Transformer -Power transformer. 105-120 volts, 25 cycles MODEL U-42 Additional Replacement Parts: Stock No. 11765 Lamp-Dial lamp 11763 Receptacle-Needle card holder 3559.5 Resistor -15,000 ohms, 3 watts (R2 4723 Socket -3 -contact socket for lo

30、op 10585 Spring-Drive cord spring 11445 Transformer-Power transformer, 105- 125 volts, 25 cycks MODEL U-43 Capacitor Added: In Model U-43, a 0.1 mfd. capacitor (Stud. No. 4839) is added in shunt to electrolytic ca- pacitor C23. Add Stock No. 35595 Resistor -1.5,000 ohms, 3 watts (R21 Replacement Par

31、ts MODEL U- 43 Insist on genuine factory -tested parts, which are readily identified and may be purchased from authorized dealers. STOCK No. DESCRIPTION STOCK No. DESCRIPTION CHASSIS ASSEMBLIES (RC -498E) 31445 34261 Transformer-Power transformer, 100-120 volts, 25-60 cycle. Transformer-Power transf

32、ormer, 105-120 volts, 33719 Belt-Push button station setting belt 50-60 cycle (T1) 34724 Board-Antenna-Ground bard 33728 Washer-Retaining washer for shaft-Stock No. 30766 Cap-Rubber cap for tuning indicator 34411 34852 Capacitor - Trimmer -comprising 1 section of 3-30 mmfd. and 2 sections of 2-10 mm

33、fd RECORD CHANGER PARTS (C2, C4, C28) 12813 Capacitor -82 mmfd. (C30) See RP -139A-110 volts, 25-50 cycle 12720 Capacitor -100 mmfd. (C6, C16, C18, C33) RP -145 -110 volts, 60 cycle 33806 Capacitor-.0015 mfd. (C36) 34459 Capacitor-.0025 mfd. (C38) SPEAKER ASSEMBLIES 30303 Capacitor-.0035 mfd. (C19)

34、(RL -70L1) 4870 Capacitor-.025 mfd. (C37) Capacitor-Electrolytic-comprising 2 sections of 13867 Cap-Dust cap 10 mfd. and 1 section of 20 mfd. (C10, C22, 12012 Coil-Field coil C23) 35616 Cone-Cone complete with voice coil 34285 Clip-Clip and thumb screw for tuning indicator. 34728 Diffuser-Speaker di

35、ffuser 35739 Coil-Choke coil 5039 Plug -4 -prong male speaker plug 32707 Coil-Oscillator coil (Ll, L2) 33444 Transformer-Output transformer 35738 Control-Tone control 34721 Control-Volume control and power switch (R4, S4) MISCELLANEOUS ASSEMBLIES 32634 Cord-Tuning condenser drive cord 35563 Button-P

36、ush button 34853 Core-Adjustable core and stud far oscillator 31456 Cover-Protective covers for markers coil . 35468 Decalcomania-Caution decal for record changer 33633 Indicator-Station selector indicator 35742 Decalcomania-Control decal 11891 Lamp-Dial lamp 35592 Decalcomania-Control decal. 35737

37、Plate-Dial plate 35741 Decalcomania-RCA-Victrola decal 30868 Plug -2 -contact female plug for motor lead. 35565 Dial-Glass dial scale 5040 Plug -4 -contact female plug for speaker leads. 35564 Escutcheon - Dial scale and push button es - 14499 Resistor -1,500 ohms, watt (R16) cutcheon 13998 Resistor

38、 -22,000 ohms, watt (R9, R13, R22, 34583 Frame-C band antenna loop frame R23) . 30698 Hinge-Cabinet lid hinge 12738 Resistor -27,000 ohms, watt (R8) 13103 Jewel-Pilot lamp jewel 13715 Resistor -68,000 ohms, 1. watt (R18) 34998 Knob-Tuning, v o 1 u m e control, and power 12013 Resistor -1 meg., 1/10

39、watt (R24) switch, range switch or tone control knob. 33735 Screw-Push arm adjusting screw 34729 Loop-Antenna loop 34411 Shaft-Tuning condenser drive shaft 33973 Marker-Station selector push button markers. . 34723 Socket -3 -contact socket for antenna loop 32641 Plug -3 -prong plug for antenna loop

40、s 31364 Socket-Dial lamp socket 35832 Pull-Door pull 33742 Socket-Phonograph input socket 11763 Receptacle-Needle card holder 13871 Socket-Tuning indicator socket 35172 Rubber-Sponge rubber strip for doors 31319 Socket-Tube socket 35740 Shade-Compartment lamp shade 30585 Spring-Drive cord spring 142

41、70 Spring-Retaining spring for knob - Stock No. 34726 Spring-Push arm return spring, .018 dia. wire. 34998 34722 Switch-Range switch (51) 31470 Spring-Moteirboard spring mounting hardware. 32263 Transformer-First i -f transformer (L3, L4, C11, C12) 30900 Spring-Retaining spring for button-Stock No 3

42、5563 34719 Transformer-Second i -f transformer (L5, L6, 35831 Support -Lid support-L. H. C14, C15) 35830 Support-Lid support-R. H PAGE 698-C AUTOMATIC RECORD CHANGERS TYPE NO. RP -I32, RP -139, RP -1I0 and RP -1)45 Type RP -132 or Stock No. 9844. Uses a governor type motor. Models 11QU and 12QU have

43、 a lever type speed control. Type RP -132 does not have pickup muting switch. Type RP -139 Uses an induction motor (not governor type). The turntable is driven thru a worm gear in the motor housing. Type RP -14o Uses agovernor type motor, has flat type pickup locating lever spring 9M like RP -139. T

44、ype RP -145 Uses a capacitor induction motor. The turntable is driven thru a friction drive disc mounted on the turntable spindle. Variations of each type denoted by a suffix letter such as RP -139A, RP -145E, etc. indicate variations in tone arm style, motor switch, etc. Models QU-5, U-46 and QU-51

45、 use a mercury switch to shut off the motor when. the pickup is on its rest. RP vs. MODEL NUMBERS QU-5 RP -145E 11-30 RP -132M U-123 RP -139B 11QU RP -132A U -4o RP -139A U-125 RP -132C 12QU RP -132A U-42 RP -145 U-128 RP -132 VA -22 RP -139D U-43 RP -145 U-129 RP -132C VA -22 RP -145C U-44 RP -145

46、U-129 RP -132F U-25 RP -132M U-45 RP -139A U-130 RP -132C U-26 RP -132M U-46 RP -14o U-132 RP -132B QU-51C RP -145E U-134 RP -132B RECORDS RECORD -HOLDER SHELF RECORD-HOLDEP SPINDLE POST PICKUP - ARM PICKUP INDEX AND RECORD REJECT LEVER RECORD -HOLDER POST RECORD -HOLDER SHELF TURNTABLE TURNTABLE WI

47、TH RECORD IN PLACE. SWITCH NEEDLE ECREW/ IS INCH. NEEDLE MOLE MANUAL RP- 132 PICKUP REST NEEDLE GAUSS. PLATE NEEDLE EJECTOR TAW USED NEEDLE BOX REJECT 10 INCH These record changers are available for operation on volt- ages and frequencies as follows: RP -139-A 105-125 volts, 60 cycles, 21 watts RP -

48、139-A 105-125 volts, 50 cycles, 21 watts RP -139-A 105.125 volts, 25 cycles, 22 watts RP -145 105-125 volts, 60 cycles, 15 watts RP -145 105-125 volts, 50 cycles, 15 watts RECORDS SPINDLE RECORD.NOLDER POST RECORD -MOLDER MIELP TURNTABLE WITH RECORD IN PLACE NEEDLE SCREW NEEDLE MOLE IO INCH Motor Schematic R - 145 RECORD -MOLDER SHELF RECORO-HOLDER POST PICKUP -ARM PICKUP IND!X AND RECORD REJECT Leven PICKUP REST NEEDLE Ic 31159 Arm-Pickup arm complete-less crystal car