RCA-Victor-Co-Inc-U-125 电路原理图.pdf

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1、PAGE 696-C U-125 SPEAKER PLUG LINK 3 RED - RED- B_ACK- RED BROWN RED -BLACK BLAC K BLAC K BROWN BROWN FIELD BLACK -BROWN T05Y3-G FIL. TO C18 TO 6K6 -G PLATE TO 6K6 -G PLATE TO 6146-G SCREEN SPEAKER PLUG CONNECTIONS Connections and Colors of Loudspeaker and Cable ELECTRIC TUNING B MEDIUM .- C SHORT W

2、AVE RANGE TUNING A BROADCAST RANGE -TUNING CONTROL C A B C A B 6 5 4 PUSH BUTTON 3 CONTROLS 2 1 VOLUME ei/ FULL TONE LOUD TONE SOFT OFF MAGIC POWER -TONE EYE VOLUME CONTROL The rear push-button is for dial tuning The front push-button is the Victrola switch Location of Controls je_ BOT TOM OF PICKUP

3、 -e)f6 fet-BRAID SHORTING SWITCH BLUE Pickup Connections Precautionary Lead Dress. - 1. Dress red leads from power transformer to power switch (S3), in corner of chassis and away from vol- ume control terminals. 2. Dress brown lead from push-button switch to gang over end of switch, and away from C2

4、7 and bus be- tween SS and range switch. SN BT 3. Leads to C27 must be as short as possible. -B 4. Blue lead from range switch to oscillator coil must be as short as possible and dressed away from other leads. All leads should be dressed away from antenna coil. S. Leads across back of chassis must b

5、e dressed under electrolytic away from Victrola jack. 6. Parts and leads should be dressed away from R22 -R14 as it becomes heated. 7. Leads from oscillator coil to trimmers must be dressed away from coil. 8. Green lead from S4 to range switch must be clear of other leads and away from front edge of

6、 chassis. REDUCTION OF LOW FREQUENCY RESPONSE The phono. low frequency response may be lessened by installing a5o,000 ohm 1/4 watt resistor across the terminals of the crystal pickup. PHONO PLAY-THRU ON RADIO On early models phono reproduction can be had when push -buttons are in dial tuning or push

7、 button position. This may be eliminated at a slight loss of high frequency response by removing C15 and Rii. The phono switching circuit in late 1.1-125 is changed as shown below to eliminate cross- talk. LIe CB 12o Now. LIT RA 2,0300 TO RS R5 220,000 C37 Igo K 607- G 2nD. DET f AvC IST A F 54.4 54

8、.5 i MFB C16 B-B .0025 R9 RII 470,0000 820.000n (vIarROLA swITCN ON LEFT END OF 011 PUSH BUTTON SW. .01 MFD. SNOWS ri RADIO POSITION. R6 VOL.CONTROL 2 MEG TOTAL S00000 SLOT C2o 052 0.5 MFD. 33.00O4 RCSSCR M-91127 TO PICKUP TO R25 Model U-125 Victrola Switch Circuit Used in 3rd Production (Using Stoc

9、k No. 32498 Push -Button Switch) DRUM S In -TO INDICRTOR DRIVE- CORO DRUM DRIVE CORD IN REAR GROOVE OF DRUM REO TO POWER SUPPLY -BLACK RED- REDTR. BLACK 23-A TOTAL BLAG REO- ELLO RED - BLACK (TAPED) NOTE INSERT CONNECTOR (C NTERI AEN NOD CONTCONTACT CORRESPONDING TO PREVAILING POWER SUPPLY RATING. U

10、NIVERSAL TRANS. CONNECTIONS TI GREEN - RECT FIL GREEN - BROWN- RECT. PLATE 660 + BLACK -BROWN YELLOW BROWN- BLUE AMP. FIL BLUE - Above-Universal Power Transformer Connections. (110 - volt supply for a Victrola At- tachment may be obtained by connecting the motor to the red and the red -black leads.)

11、 PULLEY KNOB SHRFT j PULLEY DRUM SHOWN WITH GRNG RT MRXIMUM CRPRCITY Arrangement of Drive Corda for Tuning Condenser and Dial Indicator 收音机爱 好者资料库 RadioFans.CN PAGE 697-C U-126 REPLACEMENT PARTS Insist on genuine factory -tested parts, which are readily identified and may be purchased from authorize

12、d dealers STOCK No. DESCRIPTION STOCK No. DESCRIPTION 14517 30752 31400 14079 31387 13141 12723 12720 14262 12404 13003 14712 31381 31435 4881 31405 5107 4838 4858 14393 30882 30887 32145 32142 31382 31402 31401 31383 31384 31385 31389 31366 31375 31374 30905 31388 31372 11891 31480 30868 5040 31373

13、 32143 13220 30545 5114 14284 12454 12268 14560 11398 12199 13479 12285 12488 30983 12013 13730 30208 12201 12879 14343 14887 RECEIVER ASSEMBLIES Board -Antenna ground terminal board Bracket -Magic Eye mounting bracket Capacitor -Triple adjustable trimmer two sections 2-10 mmfd., one section 3-30 mm

14、fd. (C21, C23, C26) Capacitor -6.B mmfd. (C1) Capacitor- -Antenna coil trimmer capacitor bank 20-470 mmfd. (C31, CS2, C33, CS4, C35, C38) Capacitor -47 mmfd. (C13) Capacitor -58 mmfd. (CS) Capacitor -100 mmfd. (C39) Capacitor -110 mmfd. (C5, CO) Capacitor -120 mmfd. (C7, C8) Capacitor -180 mmfd. (C2

15、) Capacitor -180 mmfd. (C37) Capacitor -620 mmfd. (C24) Capacitor -750 mmfd. (C26) Capacitor -3,300 mmfd. (C22) Capacitor -8,000 mmfd. (C27) Capacitor -.0025 mfd. (C16) Capacitor -.006 mfd. (C14, C17, C43) Capacitor -.01 mfd. (C10, C40, C41, C42) Capacitor -.01 mfd. (Cll, C15) Capacitor -.05 mfd. (C

16、4, C9, CS8) Capacitor -0.5 mfd. (C20) Capacitor -4 mfd. (C12) Capacitor -Comprising two 10 mfd., one 20 mfd sections (C18, C19, C44) Clip -Oscillator coil and core mounting clip. Coil -Antenna coil -A, B, and C bands (Li, L2, L3) Coil -Oscillator coil -A, B, and C bandat (L4, L5, L6, L7, L8, L9) Coi

17、l -Oscillator coil -A band (L41, L42) Coil -Oscillator coil -A band (LS9, L40) Coil -Oscillator coil -A band (L37, L38) Condenser -2 -gang variable tuning condenser (C28, C29, C30) Control -Volume control, tone control, and on - off switch (R8, R13, SS) Cord -Indicator pointer drive cord Cord -Varia

18、ble condenser drum drive cord Core -Adjustable Core for i -f transformer Core -Adjustable core and stud for oscillator coil, Stock Nos. 31383, 31384, and 31385 Drum -Variable condenser drive cord drum and calibration dial Lamp -Phono. compartment lamp Lamp -Dial and Electric Tuning lamp Plug -2 -con

19、tact female plug for motor cable Plug -4 -contact female plug for speaker cable Pulley -Drive cord pulley Resistor -Voltage divider comprising one 11,000 - ohm, one 3,000 -ohm, one 22 -ohm, and one 270 - ohm sections (R14, R22, R23, R24) Resistor -58 ohms, I -watt (R27) Resistor -180 ohms, t -watt (

20、RS) Resistor -16,000 ohms, 1 -watt (R17) Resistor -22,000 ohms, 1/10 -watt (R4) Resistor -33,000 ohms, 1 -watt (R2, R12) Resistor -39,000 ohms, 1 -watt (R7) Resistor -100,000 ohms, 1 -watt (R25) Resistor -220,000 ohms, 1/10 -watt (R5) Resistor -270,000 ohms, t -watt (Rib, R19) Resistor -390,000- ohm

21、s, t -watt (R20, R21) . Resistor -470,000 ohms, 1 -watt (R9) Resistor -560,000 ohms, 1 -watt (R18) Resistor -820,000 ohms, 1 -watt (R11) Resistor -1 meg., 1/10 -watt (R16) Resistor -I meg., 1 -watt (Rl) Resistor -1.2 meg., 4 -watt (R10) Resistor -1.5 meg., 1 -watt (R26) Resistor -2.2 meg., 1 -watt (

22、RS) Retainer -Retaining spring for station selector knob shaft Retainer -Drive cord otillev retainer. Motor Bracket Flexible Mount: Mechanical hum resulting from motor vibra- tion is generally governed by cabinet resonance, amount of torque in the particular motor, and the various mountings involved

23、. Tolerances are maintained on each of these items so they bal- ance out and no hum interference develops. An occasional instrument, however, may have ac- centuated resonance or vibration which are ad- ditive in effect. In order to remedy this condi- tion, a more flexible cushion should be used for

24、4669 31368 3682 30888 12493 13871 14278 31251 31418 31398 31370 14378 14283 31445 31446 32144 13886 12012 11489 31275 31539 32146 14634 14357 12038 31397 13103 31456 31541 31591 31407 31395 30898 31543 31392 31355 14359 31391 30773 31460 31459 31590 31393 31760 11210 31470 4982 14270 30330 31478 Scr

25、ew -No. 8-32 square head set screw for drum, Stock No. 31372 Shaft -Station selector knob shaft and pulley Shield -Tube shield Socket -2 -contact female socket for motor power cable Socket -5 -contact female socket for speaker cable Socket -Magic Eye socket Socket -Pickup input socket Socket -Tube s

26、ocket Spring -Indicator or drum drive cord tension spring Switch -Range switch (Si, S2) Switch -Station selector push-button switch (S4, 55, S31, S32, 533, S34, 535, SS8, 537, S38, S39. S40, S41, 542, 543, 544) Transformer -First i -f transformer (1.10, L11, C5, C6) Transformer -Second i -f transfor

27、mer (L12, L13, C7, C8, C37, R4, R5) Transformer -Power transformer 105-125 volts, 25-60 cycles (T1) Transformer -Power transformer 100-130/140- 160/200-250 volts, 50-80 cycles (T1). Transformer -Power transformer 105-125 volts, 50-60 cycles (T1) SPEAKER ASSEMBLIES (RL -70 H-5 ) Cap -Dust cap for con

28、e center Coil -Field coil (L16) Coil -Neutralizing coil (L15) Cone -Speaker cone and voice coil (L14) Plug -S -contact male plug for speaker Speaker complete Transformer -Output transformer (T2) Washer -Spring washer to hold field coil securely MISCELLANEOUS ASSEMBLIES Band -Rubber band for Magic Ey

29、e Button -Station selector push-button . Cap -Pilot light jewel Cover -B -protective covers for push-button markers Cushion -Motor plate mounting cushions and clamps sufficient for one instrument Dial -Station selector dial scale Escutcheon -Magic Eye or Electric Tuning in- dicator escutcheon Escutc

30、heon -Tuning dial escutcheon only, leas push -buttons and dial scale Hinge -Cabinet lid hinge Indicator -Electric Tuning indicator disc Indicator -Indicator pointer, carriage, and clip Knob -Range switch knob Knob -Station selector knob Knob -Tone control knob Knob -Volume control knob Marker -Dial

31、Tuning marker for push-button Marker-Victrola marker for push-button Markers -Station call letter markers Screen -Dial color screen Screen -Phono. compartment lamp screen Screw -Chassis mounting screws, washers, and lockwashers Springs-Motorboard suspension top spring, bot- tom spring, screw, and lo

32、ckwacher (4 reqd.) Spring -Retaining spring for knob Stock No, 14359 Spring -Retaining spring for knob Stock Nos. 30773 and 31365 Spring -Retaining spring for knob Stock No. 31391 Support -Cabinet lid support supporting the motor bracket to the cabinet. Replacement Stock No. 31541 will include two s

33、ets of rubber cushions, one gray colored and the other black. The gray is quite flexible, whereas the black is relatively stiff. The black is for use on the Model U-125 particularly where mechanical hum is present, and the gray is for use on other phonograph combinations where No. 31541 is specified

34、. REPLACEMENT PARTS AUTCRIATIC RECORD CHANGER REFER TO RP -132 PAGE 698C 收音机爱 好者资料库 RadioFans.CN 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 a lever type speed control. Type

35、 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. Type RP -145 Uses a capacitor indu

36、ction 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 use a mercury switch to shut off

37、 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 U-129 RP -132F U-25 RP -132M U-45

38、 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 WITH RECORD IN PLACE. SWITCH NEEDLE

39、 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 -139-A 105-125 volts, 50 cycles, 2

40、1 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 SH

41、ELF RECORO-HOLDER POST PICKUP -ARM PICKUP IND!X AND RECORD REJECT Leven PICKUP REST NEEDLE Ic 31159 Arm-Pickup arm complete-less crystal car - tridge, needle screw, and cable Cable-Pickup32635 lift arm cable and clips Cable-Output cable and plug 31148 Escutcheon-Index escutcheon 32556 Model U-125 U-

42、128 U-129 U 130 * 31156 Crystal-Pickup crystal cartridge and needle screw U-132 U-134 33114 Damper-Viscoloid damper for crystal armature 31873 Escutcheon-Speed regulator escutcheon 31160 91181 Screw-Pickup needle screw Shaft-Pickup pivot arm and .shaft assembly Model 11QU 12QU Only 33098 Arm-Pickup

43、arm, less crystal and cable 31151 Guide-Pickup lift cable guide (coil spring, 80T 2 -in. large) (2) U -2b. I)-28, -30, U-129 2nQ prod. 31150 Mounting-Pickup arm base rubber mounting complete 31155 Spring-Needle cup lid tension spring 32632 Crystal-Pickup crystal cartridge and needle screw Models U-1

44、32 and U-134 Only OPERATING MECHANISM *NOT USED ON ALL TYPES 31134 Bracket-Pickup locating lever mounting bracket SEE SEPARATE LISTING (3) * 31144 Cam-Cam and gear assembly (4) 6808 31148 91129 31118 Clutch-Trip lever friction clutch assembly (5) Coupling-Motor coupling complete with turn- edrive ge

45、ar, rubber strips, motor coupling, a d drive a Cover-Cap for top of record post Finger-Trip lever frict on finger assembly (7) NOTE: RP -140 REPLACEMENT PARTS REFER TO MODEL U-46 91119 Gear-Long arm and rack gear for front left- hand record poet (8) PAGE 498C 31120 Gear-Short arm and rack gear for r

46、ear right- hand record post (9) PAGE 706-C RP -132, RP -139, RP -040, RP -1145 Replacement Parts RP- 139, RP- 145 SERIES Insist on genuine factory -tested parts, which are readily identified and may be purchased horn authorized dealers. STOCK DESCRIPTION STOCK N DESCRIPTION ASSEMBLIES (Model RP -139

47、A) MODEL VA -22 2nd Production: The 2nd production of Model VA -22 uses 32956 Coil-Field coil and laminations for 25 cycle motor mechanism similar to RP -139A and RP -145. For replacement parts, refer to the Service 32955 Coil-Field coil and laminations for 50 cycle motor Data on RP -139A and RP -14

48、5 as specified below: 32954 Coil-Field coil and laminations for 60 cycle motor Stock No. 32960 Gear-Motor spindle gear and pin PICKUP AND ARM ASSEMBLIES 32873 32872 Motor-Motor complete, 25 cycle, 110 volt AC Motor-Motor complete, 50 cycle, 110 volt AC Same as RP -145, except add: P 32871 Motor-Motor complete, 60 cycle, 110 volt AC 33905 Crystal-Pickup crystal cartrid