RCA-Victor-Co-Inc-12QU 电路原理图.pdf

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1、PAGE 211-C PSU 8A, 8B, 8C, 10A, 10B and 10C A -C Power Supply Units General Description Certain models of the Q Line of RCA Victor Magic Brain 1938 radio receivers are designed for use with a sepa- rate plug-in power supply unit. Different units are available to permit operation on a -c power suppli

2、es of various voltages and cycles, and also on 110 or 220 volts d -c. Service data and diagrams for the a -c units are contained in this sheet: The d -c units are described in a separate sheet. Each a -c unit is equipped with an 18 -inch 6 -wire cable with a 7 -contact female receptacle which plugs

3、into a 7 -prong male connector on the receiver chassis. The a -c power cord is 6 feet long. The units are approximately 71/2 inches long, 41/4 inches wide, and 6 inches high. Testing.-To check an a -c power unit when a receiver is not available, connect a 50 -watt resistor (4,800 ohms for PSU 8A, 8B

4、, 8C, and 3,450 ohms for PSU 10A, 10B and 10C) across contacts 2 and 6 on the power receptacle. Connect a jumper across contacts 4 and 5. Measure the d -c voltage across the resistor, which should be approximately 375 volts, with 117 volts supply on the 117 -volt tap. Specifications TyPeRadiotron Ra

5、ting g Rectifier D -C Output Heater (A -C) Used with Models D -C Resis., Ti Net Weight (pounds) Voltage Cycles Pri. ohms Total Sec. ohms Total PSU SA 105-125 50/60 5Y3 -G 375 volts at 78 milliamps 6.45 V 3 amps 8Q1 and 8Q4 6.4 535 7 PSU 8B 105-125 25/60 8.3 705 9 PSU 8C .Universal* 50/60 17.4 455 11

6、 PSU l0A 105-125 50/60 5U4 -G 380 volts at 110 milliamps 6.36 V 5 amps lOQl, 12Q 12Q4, 12Q U* 3.0 250 9 PSU 10B 105-125 25/60 3.9 250 13 PSU lOC Universal* 50/60 8.9 190 15 * The universal can be set for 105-117, 117-130, 140-160, 200-225, or 225-250 volt supply. * Model 12QU has a phonograph motor

7、designed for 50/60 cycle operation only, and uses either PSU 10A, or IOC. REPLACEMENT PARTS Insist on genuine factory -tested parts, which are readily identified and may be purchased from authorized dealers. STIOoCK DESCRIPTION STOCK DESCRIPTION 11203 14531 14409 51251 31733 31736 Cable -8 -conducto

8、r power output cable with plug Capacitor -10 mfd. (Cl) (PSU 8A, 8B or 8C only) Capacitor -25 mfd. (C1) (PSU 10A, 10B or lOC only) Plug -7 -contact plug for power output cable Socket-Rectifier tube socket Transformer-Power transformer 105-125 volts, 50-60 cycle (T1) (PSU SA only) Transformer-Power tr

9、ansformer 105-125 volts, 50-60 cycle (T1) (PSU l0A only) 31734 31737 31735 31738 Transformer-Power transformer 105-125 volts, 25-80 cycle (T1) (PSU 8B only) Transformer-Power transformer 105-125 volts, 25-60 cycle (T1) (PSU 10B only) Transformer-Power transformer 105-130, 140- 180, 200-250 volts, 50

10、-60 cycle (Ti) (PSU 8C only) Transformer-Power transformer, 105-130, 140- 160, 200-250 volts, 50-60 cycle (T1) (PSU 10C only) 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 2i2-C PSU 8A, -B, -C, IO A, -B, -C T 1 Ct p W W I Cr A. C.SUPPLY PLUG

11、 GREEN GREEN RECTIFIER TUBE 5Y3 -G IN PSU 8A 6 BB 5U4 -G IN PSU 10A VOg n N O .,52 Rn Q I I- . h U J ,J I- g d = .a- 111. a w J arl nn = Z _ N S p N ZO LL 93WZ Z N m U T p(N N/LL J FJ x du F = :8 _f moe oza r HII N O I -= 0 r u u000o01 a J W d Ca W O t P 61 / 111_u O_ LLZJ 000 II / o LL j aac 100 LL

12、 2.:4: I _ F u_ I Z C p-I O ilil II. O P ! K n ,.,._ , LL s u -F A 0e - _ m . N II I o -4 *II, 111 % 0 _ , ; a u- + O 7S N o wr N ,.rjNLL uoF F- w OJ F N oo II1 1 F LA N L G o CC -1-N D g PAGE 31_7-C 12Q11, 12QK, I2QU F V o I eei unF 3 000 ca I f i N zg xn N LL 3 0001 T1117:7; n onl N d4 T J ,nF il-

13、11t U U Hi o Q CN01173n0) naM1 ,UIP 1/I. rc VO00 sa 00 o OLL I_U N2 - ti- 11 S.0 m N UNf u. O Jn 111 2e e Wo O LLm F ec- rF 11, sn uR T F 000 001 5121 H11 9121 do W 0 21 ,17f1 4 a u000 09s V0o0!Y la Z121 eF -I- tr000oo1 y121 000 -UI d / J f J N A 77 d -21fONn fr-III 6p yo m e,J IP G21 u X 4o0oCC za

14、5. 318-C 1294, 12QK, 12QU oonnU cm el m.nam ii1LLLD 0tnlp,ul0 83= o Precautionary Lead Dress. - 1. The following leads should be dressed away from other parts and chassis: a. All leads to the bottom of the tuning gang. b. All capacitor leads to oscil lator section of range switch. c. Yellow lead fro

15、m lug No. 10 on S4 to dummy lug on A oscillator coil. a u N N_ m= rNM089C. I ua 2_O z m QZ Z LS D e. Yellow a n d green from X detector (should be dressed away from each other as well as other parts). 2. Dress all leads away from phono jack and C49. O n ;. l o ry ;ti o x= U i O (7) y Nd o r EZD d. Y

16、ellow lead from pin No. 8 on 6J7 oscillator socket to terminal board. leads 4. coil 14 -1 3. Twisted leads of B oscillator coil must be soldered together within 1/4inch of coil tube. The brown, black, and blue leads in back of the oscillator coils should be dressed away from coil windings. R13 and C

17、41 must be dressed away from pin No. 7 of 6J5 (tube No. 7). M O0 F PAGE 319-C REPLACEMENT PARTS t2Q11, 12QK, Insist on genuine factory -tested parts, which are readily identified and may be purchased from authorized dealers. I2QU STOCK DESCRIPTION STOCK DESCRIPTION ASSEMBLIES 0132 14560 Resistor -47

18、,000 ohms, 1/10 watt (R12) Resistor -100,000 ohms, watt (R7, R14, R15, 31815 Board -Antenna and ground terminal board- R18, R19, R34) Models 12Q4 and 12QK only 12264 Resistor -220,000 ohms, watt (R26, R30). 31929 Board -Antenna and ground terminal board- 12199 Resistor -270,000 ohms, watt (R31, R41)

19、 - Model 12QU only R41 in Model 12QU only 31276 Bracket -Band indicator bracket complete less 11453 Resistor -270,000 ohms, 1/10 watt (R16, R17) indicator strip, spring, and cord 12486 Resistor -560,000 ohms, watt (R13) 4.4. 31282 Bracket -Magic Eye mounting bracket and clip Cable drive 30963 Resist

20、or -820,000 ohms, watt (1142) -Model 31281 12QU only. -Indicator pointer cable Cap -Rubber cap for Magic Eye 30766 12013 Resistor -1 meg., 1/10 watt (R32, R33) 12607 Cap -Top shield cap for i -f transformers 13730 Resistor -1 meg., watt (R1, R4) 12807 Capacitor -Trimmer 2-8 mmfd. (C70) 30208 Resisto

21、r -1.2 meg., watt (R40) -Mode 1 12714 Capacitor -Trimmer 2-12 mmfd. (C29, C31) 12QU only 12884 Capacitor -Trimmer 2-20 mmfd. (C4, C6, C8, 12679 Resistor -2.2 meg., 4 watt (R20) C12, C15, C18, C19) 14887 Retainer -Pulley retainer 14392 Capacitor -4.7 mmfd. (C26, C41) 4669 Screw -No. 8-32 sq. hd. set

22、screw for drum, 31709 Capacitor -10 mmfd. (C69) Stock No. 31273, and pulley, Stock No. 13200 Capacitor -10 mmfd. (C16, C17) 31272 and Stock No. 31788 13002 Capacitor -12 mmfd. (C1, C2) 14404 Socket -7 -contact male socket for power input. 31354 Capacitor -33 mmfd. (C22) 31364 Socket -Dial lamp socke

23、t 13545 Capacitor -39 mmfd. (C80) -Model 12QU only 14278 Socket -Phonograph input socket 31822 Capacitor -43 mmfd. (C20) 13871 Socket -Magic Eye socket 31349 Capacitor -62 mmfd. (C14) 31251 Socket -Tube socket 13057 Capacitor -68 mmfd. (C28) 31279 Spring -Band indicator tension spring 31270 Capacito

24、r -100 mmfd. (C50, C51) 31418 Spring -Drum drive cord tension spring 12720 Capacitor -100 mmfd. (C33, C52) 13638 Spring -Indicator pointer drive cable tension 31706 Capacitor -120 mmfd. (C11) spring 12724 Capacitor -120 mmfd. (C24) 31849 Switch -Fidelity switch - Models 12Q4 a n d 31908 Capacitor -1

25、55 mmfd. (C21) 12QK only (S7, S8) 13003 Capacitor -180 mmfd. (C27) 31961 Switch -Fidelity switch (S20, S21, S22, S23) 31756 Capacitor -330 mmfd. (C35, C36, C46, C47). -Model 12QU only 12952 Capacitor -330 mmfd. (C3, C25, C84) 31844 Switch -Range switch -less coils (S1, S2, S3, 30608 Capacitor -510 m

26、mfd. (C10) S4, S5, S6) 12537 Capacitor -560 mmfd. (C30, C86) 30953 Switch-S.P.S.T. sensitivity switch (S10) 3170.3 Capacitor -2,500 mmfd. (C9) 31850 Tone and pwer switch (S9, S11) 31704 Capacitor -8,000 mmfd. (C7) 31746 Transformer -First i -f transformer (L23, L24, 5107 Capacitor -.0025 mid. (C65)

27、L25, C35, C36) 4838 Capacitor -.005 mid. (C53, C67, C81, C82- C81, C82 in Model 12QU only) 31749 Transformer -Second i -f transformer (L28, L29, L30., C46, C47) 5148 Capacitor -.007 mid. (C59) -Models 12Q4 and 12QK only 31268 Transformer -Third i -f transformer (L31, L32, C50, C51) 14393 Capacitor -

28、.01 mid. (C23, C34, C42, C44, 31847 Transformer -Output transformer (Ti) C45, C49) 31848 Volume control (R29) 11315 Capacitor -.015 mfd. (C62) 30938 Capacitor -.025 mid. (C39, C54, C61) SPEAKER ASSEMBLIES 4886 Capacitor -.05 mfd. (C37, C38) 4839 Capacitor -0.1 mfd. (C40, C43, C48) (Speaker RL70H-3)

29、12484 Capacitor -0.25 mfd. (C57, C58, C60, C63, C68) 31825 Cap -Speaker cone center dust cap 5212 31845 31257 Capacitor -16 mfd. (C55, C56) P Coil -A band antenna coil (L Le) Coil -A band oscillator coil (L12) 11469 11234 31275 Coil -Hum neutralizing coil (L34) Coil -Speaker field col (L33) Cone -Sp

30、eaker cone and voice coil (L35) 31891 Coil -A and X bands r -f coil (L20, L21, 31830 Plug -4 -contact male plug for speaker L22) 31853 Speaker complete 14949 Coil -B band antenna coil (L5, L6) 31890 Coil -B and 49 -meter bands oscillator coil MISCELLANEOUS ASSEMBLIES (L18) 14952 Coil -B band r -f co

31、il (L27) 13103 Cap -Pilot lamp cap (bullseye)-Model 12QU 14950 31255 Coil -C band antenna coil (L3, L4) Coil -C or 31 -meter band oscillator coil (Lll, L17) 31541 only Cushion -Motor plate mounting cushion and 14953 Coil -C band r -f coil (L26) clamp assembly (sufficient for one instrument - 31892 C

32、oil -X band antenna coil (L9, L10) Model 12QU only 31812 Coil -X band oscillator coil (L1S) 31962 Dial -Dial scale and crystal- Model 12QU 31852 Coil -19 -meter band oscillator coil (L15, L16). only 31254 Coil band 31855 Dial -Dial scale and crystal -Models 12Q4 and -25 -meter oscillator coil (L14)

33、Coil -49, 31, 25, and 19 -meter bands antenna 14951 12QK only coil (L1, L2) 31921 Escutcheon -Dial escutcheon less dial scale and 31846 Coil -49, 31, 25, and 19 -meter bands r -f coil crystal -Model 12QU only (L19) - 31854 Escutcheon -Dial escutcheon less dial scale and 31843 Condenser -3 -gang vari

34、able tuning condenser crystal -Models 12Q4 and 12QK only (C5, C13, C32) 30698 Hinge -Cabinet lid hinge -Model 12QU only. 31278 Cord -Band indicator drive cord 31564 Holder -Needle card holder -Model 12QU only 31927 Cord -Variable condenser drum drive cord 31717 Indicator -Dial indicator pointer, car

35、riage, and 31787 Drive -Two -speed drive and mounting bracket clip assembly -Model 12QU only 31273 Drum -Variable condenser drive drum 31714 Indicator -Dial indicator pointer -Models 12Q4 31928 Indicator -Band indicator strip and 12QK only 11891 Lamp -Dial lamp 31355 Knob volume control, tone 31480

36、Lamp -Dial lamp (center) -Station selector, control, range switch, or fidelity switch knob 14028 Nut -Jamb nut for capacitor, Stock Nos. 12714, -Model 12QU only 12884, and 12O7 31802 Knob -Station selector, volume control, tone 31817 Plate -Cushion sbcket mounting p 1 a t e - less socket control, ra

37、nge switch, or fidelity switch knob -Models 12Q4 and 12QK only 5040 Plug -4 -contact female plug for speaker cable. 30888 Plsg-2-contact female plug for speaker cable 31788 Pulley -Two speed drive pulley 30888 Plug -2 -contact female plug for motor power 31280 Pulley -Indicator pointer cable pulley

38、cable -Model 12QU only 31272 Pulley -Range switch shaft pulley 30870 Plug -2 -contact male plug for speaker cable. 31851 Resistor -Voltage divider -comprising one 1,500- ohm, one 4,200 -ohm, one 8,000 -ohm one 25- 31287 Rod -Pointer carriage slide rod ohm, and one 150 -ohm sections (1221, R22, R23,

39、R24, R25) 31559 Screen -Dial color screen and light diffuser - Model 12QU only 14720 Resistor -1,000 ohms, watt (R10 Rll). 31285 Screen -Dial color screen and light diffuser - 31920 Resistor -1,800 ohms, 1/10 watt (R8) Model 12Q4 and 12QK only 12955 Resistor -3.900 nhms, i w. (R8) 31568 Spring -Poin

40、ter carriage stop spring 30128 Resistor -12,000 ohms, watt (R9) 14270 Spring-Retainingspring for knob, Stock Nos. 13998 Resistor -22,000 ohms, 4. watt (R27) 31355 and 302 12738 Resistor -27,000 ohms, watt (R28) 11850 Support -Cabinet lid support -Model 12QU only 12454 Resistor -33,000 nhma. i watt (R2, RS, R5) 31470 Suspension- Motorboard suspension sprigs screw, and washer (4 required) -Model QQs, only