RCA-Victor-Co-Inc-RC-507 电路原理图.pdf

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1、MANUAL OF 1946 MOST POPULAR SERVICE DIAGRAMS COMPILED BY M. N. BE3TMAN, SUPREME PUBLICATIONS 收音机爱 好者资料库 RadioFans.CN MANUAL OF 1946 MOST POPULAR SERVICE DIAGRAMS Pointer for Calibration Scale.Improvis a pointer for lh cali bration seal by fastening a piece of wire to the gang-condenser frame, and ba

2、nd the wire so that it points to the 180* mark on the calibration scale whfrti the plates are fully meshed. Dial-Indicafor Adjustment.After fastening lh chassis in lh cabinet, attach the dial indicator to lh drive cable with indicator at lh 540 kc mark (the firsl mark on A band to lh left of 550). a

3、nd gang condenser fully meshed. The indicator has a spring clip for attachmont to the cable. Spread-Band Alignment.The most satisfactory method of align ing or chocking the spread-band ranges is on actual reception of short-wave stations of known frequency, by adjusting the magnet ite-core oscillato

4、r coil for each spread-band so lhal these stations come in al the correct points on the dial. Fn exceptional cases, when the set is being serviced in a location where the noise level is high enough to prevent reception of short wave stations, a test-oscillator may be used for alignment, but an extre

5、mely high degree of accuracy is required in the frequency set- tinas of the test-oscillaor, as a slight error will prodyce consider able inaccuracy on the spread-band dials. The frequency sellings of the test-oscillator may be checked by one or both of lh follow ing methods: 1. Determine the exact d

6、ial settings of the test-oscillator (for fre quencies at or close to the specified alignment frequencies) by zero-beating the test-oscillator against short-wave stations of known frequency. 2. Use harmonics of the standard-broadcast range of a test-oscil lator, first checking the frequency settings

7、on this rang by means of a crvstal-controlled oscillator, or by zero-beating against standard broadcast stations. When a test oscillator is employed for spread-band alignment, a final check should be made on actual recaption of shorl-wav sta tions of known frequency, and the magnetite-core oscillato

8、r coil for each band should be retouched so that the stations come in al the correct points on th dial. POVE- VOLUMC CONTROL , USTOP I 1 04 BOTTOM ADJ. 4SSKC IT- L=J Jgjsejfe U.MiK_ILSMC /fit c,J (% I ( ASMC 14 C4 C9C , 1 46DKC l9QOKCS ZS 115 BOTTOM k US TOP A0J.4S5KC / WOCTAF.AWC. LINE VOLTAOS t MW

9、lTCM ON 2MV UNIVSRSAL Lfi MOOSL9 NLV-*! OUTPUTmCT RCA MODUS Q22A QU2M has - magnetic pickup) Model Q27 Q-27 IS SIMILAR TO MODEL Q-25 OIL HERE MOTOR SPINDLE TLRNTADLE, MOTOR PHONO -RADIO CONTROL OIL HERE LEN. Fu LL TONE CONTROL USED NEEDLE DO QU 2. PKKUO NEW NEEDLE bOx NEEDLE HOLE NEEDLE GAUGE PLATE

10、NEEDLE ECREw Motorboard and Controls Model Q22 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 PAGE 28-C Qu -2, Q-22, QK-23, Q-25, Q-27 -2- o o z, V Y h a0 0-0ffo 000 OSI n ei Q r N o N o -IH IH N of o z 0 k. 1F-0-II z z o SsII U f el 1f1 V0 -fe lm

11、 m ?C Q iN , n V a e d r YIN N Y ceo O LL W D U J m tTv, N a U Lr s -IF-f O m 9 O . 0 Ifl V 1 PAGE 29-C QU-2, Q-22, QK-23, Q-25, Q-27 Phonograph Information The tU2M is equipped with a magnetic pickup, and the QU2C with a crystal pickup. The output of the crystal pickup is fed into the audio end of

12、the receiver through a switch and compensating circuit. On instruments using a magnetic pickup, a transformer and compensating circuit are used between the pickup and the audio input (see schematic diagram). The transformer has two jacks, the larger one (primary) for input from the pickup and the sm

13、aller one (secondary) for output to the compensating circuit. The components of the compensating circuit are mounted externally to the chassis on a terminal board in the cabinet. CONNECTIONS AS USED WITH MAGNETIC PICKUP (QU2M) 66,000!1 PICKUP GREEN 12,000 R 035 MFD. GREEN 1 2 3 .005 YELLOW MFD. R. P

14、H. 56 -RADIO- PHONO. SW. 120,00011 Schematic Showing Magnetic Pickup Cnnections (QU2M) The phonograph motor has its bearing filled with oil and sealed at the factory and hence should not require lubrication in the field. However the two rubber tired idler pulleys should have their bearings lubricate

15、d occasionally with S.A.E. 10 oil. Care should be taken not to get any oil, grease, or other foreign matter or. the rubber tires. These tires and the motor spindle should be cleaned occasionally with quick drying naphtha. The turntable spindle bearing should also be lubricated occasionally with S.A.

16、E. 10 oil. Alotor Schematic CABLE SOCKET BLACK 10 OUTPUT PLATES BLACK -BLK TO OUTPUT SCREEN: BONN -RECTIFIER FILAMENT Connections and Colors of Loudspeaker and Cable CONNECTIONS AS USED WITH CRYSTAL PICKUP (2C) .007 15,00011 z 57 BROWN F VOL. CONTR. 500, 00 0 - TAP AT 125,000n RED GREEN -RED GREEN -

17、RED BROWN 55 ON 220V MODELS 56 ONLY ON VOL CONTROL .Schematic Circuit Diagram with Crystal Pickup (QUA) The motor switch is automatic for both starting and stopping, and when properly adjusted, will turn the motor on as the pickup is moved front the pickup rest toward the turntable. The switch shoul

18、d he adjusted so that it will snap into the off position when the pickup needle is 11 inches from the center line of the spindle shaft. The motor may be shut off at any time by placing the pickup on the pickup rest. ROLLER LEVER SPRING-. ACTUATING LEVER SHELLAC - - t - CAM ASSEMBLY E CAM SPRING w CA

19、M SET SCREW SPOOL CLIP MERCURY TUSE MERCURY SWITCH MECHANISM (VIEWED FROM FRONT SHOWN WITH PICKUP IN REST POSITION) Dial -Indicator and Drive Mechanism PAGE 30-C QU-2, Q-22, QK-23, Q-25, Q-27 Alignment Procedure Test-Oscillator.-For all alignment operations, connect the low side of the test -oscilla

20、tor to the receiver chassis, and keep the output as low as possible to avoid a -v -c action. Calibration Scale on Indicator -Drive -Cord Drum.-The tuning dial is fastened in the cabinet and cannot he used for reference (luring align- ment, therefore a calibration scale is attached to the indicator -

21、drive - cord drum which is mounted on the shaft of the gang condenser. The setting of the gang condenser is read on this scale, which is calibrated in degrees. The correct setting of the gang in degrees, for each align- ment frequency, is given in the alignment table. To determine the corresponding

22、frequency for any setting of the calibration scales, refer to the accompanying drawing which shows the dial with 0-180 calibration scales drawn at top and bottom. Pointer for Calibration Scale.-Improvise a pointer for the calibra- tion scale by fastening a piece of wire to the gang -condenser frame,

23、 and bend the wire so that it points to the 180 mark on the calibra- tion scale when the plates are fully meshed. Dial -Indicator Adjustment. - After fastening the chassis in the cabinet, attach the dial indicator to the drive cable with indicator at the 540 kc mark, and gang condenser fully meshed.

24、 The indicator has a spring clip for attachment to the cable. Spread -Band Alignment.-The most satisfactory method of aligning or checking the spread -band ranges is on actual reception of short- wave stations of known frequency, by adjusting the magnetite -core oscillator coil for each hand so that

25、 these stations come in at the correct points on the dial. When a test oscillator is employed for spread -band alignment, a final check should be made on actual reception of short-wave stations of known frequency, and the magnetite -core oscillator coil for each band should be re -adjusted so that t

26、he stations come in at the correct points on the dial. Q27 (RC507K) Service Data: Model Q27 is similar to Model Q25 which is described in the Service Note for Models Q22, QK23, and 025. Replacement parts for Q27 are same as for Q25, with exception of the following parts used in Q27: CHASSIS ASSEMBLI

27、ES (RC -507K) 37976 Bracket-Tone control mounting bracket 38409 Control-Tone control 38412 Control-V o l u m e control and power switch 32634 Cord-Drive cord (approx. 29 -in. overall length) 13988 Resistor -10 ohms, t watt 14350 Screw-No. 8-32 sq. head set screw for drive drum 35787 Socket-Phone inp

28、ut socket 31261 Spring-Retaining spring for ad- justable cord and studs 38761 Support-L.H. pulley support com- plete with pulley 38762 Support-R.H. pulley support complete with 3 pulleys 35588 Transformer-Power transformer -105,120 volts, 25 cycle SPEAKER ASSEMBLIES (92311-1) 38765 Coil-Field coil -

29、1060 ohms 38766 Cone-Cone complete with voice coil 5039 Plug -4 -prong male plug f o r speaker 38374 Transformer-Output transformer MISCELLANEOUS ASSEMBLIES 35387 Decalcomania - Power - volume decal :37879 Decalcomania-Range switch decal 35391 Decalcomania-Tuning decal 35392 Decalcomania-Trade mark

30、decal 38841 Dial-(lass dial scale 35953 Frame-Dial frame complete-less indicator pointer and dial scale. 35954 Indicator-Station selector indica- tor 35814 Knoh-Range switch knob 35650 Knob-Tone control knob 35775 Knob-Tuning or volume control knob 11691 Lamp-Dial lamp 14270 Spring-Retaining spring

31、for knob No. 35650 30900 Spring-Retaining spring for knobs No. 35775 and No. 35814 31 Connect the highSteps side of the test-osc. to- Tune test- ose. to- Range switch Turn radio dial to- Adjust the fol- lowing for max. peak output 1 12C8 I -F grid in series with .01 mfd. 455 kc A Quiet Point near 18

32、0 L3 and L4 2nd I -F Trans. 2 12SA7 1st Det. grid in series with .01 mfd. L1 and L2 1st I -F Trans. 3 Ant, lead in series with300 ohms 11.8 me 25M 138.5 L5 (osc.) C1 (ant.) 4 15.2 me 17 C2 (osc.)* 5 Repeat steps 3 and 4 6 15.2mc 19-13M 156 L6 (inc.)* 7 9.5 me 31M 158 L7 (osc.)* C3 (ant.) 8 9.5 me B

33、11.5 C4 (osc.)* 9 Ant. lead in series with 200 mmf. 1,500 kc A 26 C5 (ose.) C6 (ant.) 10 600 kc 150 LS (ose.) (Rock gang) 11 Repeat s eps 9 and 10 * Use minimum capacity peak if two can be obtained. Check image to determine that C2 has been adjusted to the correct peak by tuning receiver to approxim

34、ately 14.29 me (29) where a weaker signal should,be received. *Peak at minimum position of plunger if two peaks can he obtained. *Peak at minimum capaci y if two peaks can he obtained. NOTE: Oscillator tracks abose signal on all hands. Tube and Trimeter Location Precautionary Lead Dress. - 1. All le

35、ads between antenna coils and switch must be as short as possible and kept away from oscillator coil, leads and switches. 2. All oscillator coil leads must be kept apart from each other and other leads and parts. 3. Blue plate lead of 2nd I -F should be dressed under other leads and against chassis.

36、 Calibration Scale Reduced Reproduction of Receiver Dial, and Corresponding 0-180 Calibration Scales 180 170 . 100 90 80 A OD 50 40 30 20 M) O .n On o o is 0 9.8 10.0 10.5 110 11.8 mc . u.n . o or 442 o oan . . . . . . . ,MI C O -O 25 ( o wets 0 O at o 31 12.1. .125.-130 14.0 ,.15.5 at25 19-13 . no

37、w*a.s 1. MITEn MIO rA 100 150 140 16.0 11.2 ram o 14:r4,11.2 19.5 M MT_ n0liaml 01 0 w 22.5.t 19-13 130 120 uo 100 so 80 70 so 50 40 30 20 PAGE 3i -C QU-2, Q-22, QK-23, Q-25, Q-27 Replacement Parts Insist on genuine factory -tested parts, which are readily identified and may be purchased from author

38、ized dealers STOCK o. DESCRIPTION STOCK DESCRIPTION CHASSIS ASSEMBLIES 14292 Damper-Pickup armature damper Model QU2C (RC -507C) ModelQU2M (RC -507D) 32228 34300 Pickup Unit-Magnet coil, needle screw and armature assembled Screw-No. 6-32 x headless set screw for pick- up pivot arm 35622 Bracket-Flyw

39、heel and shaft mounting bracket. 3811 Screw-Needle screw 12714 Capacitor-Medium air trimmer (C2, C4, C5). 34654 Capacitor-Mica trimmer-comprising 3 sections (Cl, C3, C6) 35646 Capacitor -6 mmfd. MOTOR ASSEMBLIES 36012 Capacitor -15 mmfd. 31350 Capacitor -18 mmfd. 34416 Arm-Drive wheel support arm (l

40、ong) 35644 Capacitor -47 mmfd., ceramic - 34415 Arm-Idler wheel support arm (short) 13141 Capacitor -47 mmfd., moulded 34516 Armature-Motor armature complete 30949 Capacitor -56 mmfd., mica (I -F) 34515 Bushing-Motor mounting rubber bushings. 12723 Capacitor -56 mmfd., moulded 34365 Capacitor -1.25

41、mfd., 60 cycle motor starting 35645 Capacitor -68 mmfd., ceramic capacitor for motor, Stock No. 34412 13057 Capacitor -68 mmfd., mica 34514 Cover-Bakelite top end shell for motor 30904 Capacitor -100 mmfd., mica (I -F) 34414 Idler-Rubber tire idler or drive wheel 12720 Capacitor -100 mmfd., moulded

42、34412 Motor -105-125 volts, 60 cycle phono. motor - 12694 Capacitor -220 mmfd. less pulleys, capacitor and motor cradle 31433 Capacitor -560 mmfd. 34418 Plate-Motor support plate complete with turn - 35643 Capacitor -3,000 mmfd. table bearing 33640 Capacitor-.005 mfd. 14887 Retainer-Idler wheel reta

43、iner spring 5148 Capacitor-.007 mfd-(Model QU2C) 34437 Spindle-Turntable spindle 14393 Capacitor-.01 mfd., 1,000 volts 34417 Spring-Idler arm tension spring 4870 Capacitor-.025 mfd. 5196 Capacitor-.035 mfd.-(Model QU2M) ,32787 33014 Capacitor-.05 mfd. Capacitor-Electrolytic comprising 3 sections AUT

44、OMATIC SWITCH ASSEMBLIES of 10mfd. and one section of 20 mfd. 34419 Base -Pickup arm mounting base (Model QU2C) 35632 Coil-Antenna coil-A band 34312 Base-Pickup arm base (Model QU2M) 35631 Coil-Antenna coil-spread band 32865 Bracket-Switch bracket and terminal board. 35623 Coil-Oscillator coil-A and

45、 B bands 34308 Cam-Switch cam assembly with spring 35624 Coil-Oscillator coil -19-13 meter band 34007 Lever-Switch actuating lever, roller and clip. 35625 Coil-Oscillator coil -25 meter band 34309 Mounting-Pickup arm base mounting (rubber 35626 Coil-Oscillator coil -31 meter band grommet, washers an

46、d nuts) 35619 Condenser-Variable tuning condenser 34311 Ring-Retaining ring for pickup arm pivot shaft 36035 Control-Tone control 14195 Screw-No. 10-32 x 5/16 set screw for switch 35620 Control-Volume control and power switch cam hub 32634 Cord-Drive cord 34314 Shaft-Pickup arm pivot shaft (Model QU

47、2C). 35642 Dial-Calibrator dial for drive drum 36177 Shaft-Pickup arm pivot shaft (Model QU2M). 35627 Drum-Tuning condenser drive drum-less cali- 34310 Spool-Insulating spool for switch leads 35638 brator Flywheel-Tuning shaft flywheel 32868 Spring-Switch P g-Switch leverp spring 30868 Plug -2 -cont

48、act female plug for motor cable. 32867 spring for switch cam 5040 Plug -4 -contact female plug for speaker cable. 32866 Switch-MercurySpring-Tension tube and leadso 35641 Pulley-Indicator cord pulley 31608 Washer-Retaining washer for switch lever. 30735 Resistor -560 ohms, 1 watt 30128 Resistor -12,000 ohms, watt 12695 Resistor -15,000 ohms, watt-(Model QU2C) SPEAKER ASSEMBLIES