RCA-Victor-Co-Inc-5Q2 电路原理图.pdf

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1、PAGE 53-C MODEL 502 L12 SEC. ADJ. 455 KC Chassis No. RC -325-C Five -Tube, Three -Band, A -C, Superheterodyne Receiver 15T DET:$OSC. C25 i5TI.F TRANS. 6K1 I.F. L14 f2o.I.F SEC. ADJ. 455 KC TRANS. 6A8G 6Q7G R2 C6 C12 C26 2N04DET., A. V. C.$. 3 , AUDIO RECT. IC2-ANT. - I 6000 K 5Y3G r 5I OUTPUTr a I r

2、- -1 T1 l 5N-TT2-1 - 4Ij-D, e, I PHDNO.TERM. 1 2 3 BRD. L9-osc. 600 KC CIO -OSC. 6000KC C32-OSC. 1500 KC CT-OSC. 20,OOOKC At Left-Tube and Trimmer Locations Electrical Specifications FREQUENCY RANGES Standard Broadcast (A) 540.1,550 kc (555.193 m) Medium Wave (B) 2.3-7.0 mc (130.42.8 m) Short Wave (

3、C) 7.0.22.0 mc (42.8.13.6 m) INTERMEDIATE FREQUENCY 455 kc RADIOTRON COMPLEMENT (1) RCA -6A8 -G First Detector-Oscillator (2) RCA -6K7 Intermediate Amplifier (3) RCA -6Q7 -G. Second Detector, A.V.C., and A -F Amp. (4) RCA -6F6 -G Power Output (5) RCA -5Y3 -G Full -Wave Rectifier Alignment Procedure

4、Pre-setting Dial.-with the gang condenser in full mesh, the dial pointer should be in line with the left-hand end of the dial scales. The pointer is soldered to the drive cable. lILUT LAMPS (2) Mazda 44, 6.3 volts, 0.25 amp. Po1YER OUTPUT RATING Undistorted 2.5 watts Maximum 4.5 watts I ,OLDSPEAKER

5、(RL -63F -l). Type 8 -inch Electrodynamic V.C. Impedance 2.2 ohms at 400 cycles PowER SUPPLY RATINGS Rating A 105.125 volts, 50-60 cycles, 75 watts Rating .B 105-125 volts, 25-60 cycles, 75 watts Rating C. 105.125/200.250 volts, 50-60 cycles, 75 watts 01F I LLTONC POWER -TONE CONTROL TUNING SHORT RA

6、NGE SELECTOR 1011 LOUD VOLUME CONTROL s Steps Connect the high side of test-osc. to- Tune test- osc. to- Turn radio dial to- Adjust the following for max. peak output 6K7 I -F grid cap, in series with .01 mfd. 455 kc A band, Quiet Point between 550-750 kc L13 and L14 (2nd I -F Trans.) 2 6A8 -G det.

7、grid cap, in series with .01 mfd. 455 kc Lll and L12 (1st I -F Trans.) 3 Antenna Terminal in series with 300 ohms 6 mc 6 mc B band C10 (osc.) * C2 (ant.) f 4 Antenna Terminal in series with 300 ohms 20 mc 20 me C band C7 (osc.) * 5 Antenna Terminal in series with 200 mmf.A 600 kc 600 kc band L9 (osc

8、.) 6 Antenna Terminal in series with 200 mmf. 1,500 kc 11,500 kc A band C32 (osc.) * 7 Repeat steps 5 and 6. *Use minimum capacity peak if two peaks can be obtained. t After adjusting C2, check to determine that C10 has been adjusted to the correct peak by tuning the receiver to approximately 5.09 m

9、c, where a weaker signal should be received. * Use maximum capacity peak if two peaks can be obtained. Check to determine that C7 has been adjusted to the correct peak by tuning the receiver to approximately 20.91 mc, where a weaker signal should be received. NOTE: The oscillator tracks 455 kc above

10、 the signal on A and B bands, and 455 kc below the signal on C hand. 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 S4-C 5Q2 TONE CONTROL 4 POWER SWITCH RIB RECT 3T3 -G CATHODE CURRENTS 616-G 13 MR. 687_ _ _ 8.2 MA. 60,7-G 0.35 MR. 6F6-6 - 38

11、 MR. TOTAL REGT. +B_ 60 MR. T- L HEATER VOLTAGE, 6.33,*. C. 53 S en o OSC. COIL C7 C Cl2 C26 SLACK RANGE SELECTOR SI -32 L2L3 MM. TAP E 1 co s5v. 0v Y.DETSOSC. EASE L4/ L4 BLUE ELECT CAP 330v. ELECT. CAP RED-. -BROWN Cl2 -RED BOTTOM VIEW - REAR OF CHASSIS mum 190V v. 93V. 2O0ET A.VC. t AUDIO - 60.7G

12、 PHONO. TERM. 85 12 3 z i ! 2 VOLUM NT RB C25 zas; ELECT CAP LII m :Vsl_ CATHODE PAY OSCILLOERAPH VERTI(ALMI TO THIS TERM _REMOVE LINO CONNECTIONS VERTICAL 0 TO CHASSIS FOR PHONO. 1P.L.F TRANS I. F. 687 2w1F. TRANS. 1 TJ06T1I LI3 PRI55 ADJKC. 4 R -F Wiring Diagram and Socket Voltages *NOTE: Values w

13、ith star (*) are operating voltages in Measurements made to chassis unless otherwise indicated, circuits with high series resistance. The actual measured volt- with set tuned to quiet point and volume control at mini- mum. Values should hold within 20% with 115 -volt a -c ages will be lower, dependi

14、ng on the voltmeter loading. supply. PHONO TE RM. BRO. a.NT.GND. L1 LE 1.35, C2 C4 3-15 470MM MME. I1ST .GET. OSC. II 6ABG L3 4A L4 24A B_ - C8 L9 L 1 1 Is =_3.94 1.TA 6 MMF= CB a -Z-12 DAMP. RANGE SELECTOR SHOWN IN A- BAND POSITION. FOR B AND C BANDS. ROTATE. 1, KNOB CLOCKWISE. Cl2. _ . MOVABLE SEG

15、MENTS 10 (ROTOR) 2 MFD. SWITCH PROGRESSES IN THIS DIRECTION. 064 E4= I. CI .0035 MFO R1T1ti 33,000, t. F. C15 6117 Ille TOP CBI III TERM. f / C14 110 MMF. R2 470,000 A a? Cl. L11 L12 7.2A 7.2, R3 18,000, L6 0.374 4 C10 2-12 MM. C16 0.1 MFD.* 0.117 = MFD. L13L p L14 T.2A1A III i.2n 3 2 1 2HAOET,A.V.C

16、. 131 AUDIO 607G 2 F ppOI C28 OPT i C27 120 MME 120 MMF. C19 180 MMF. R4 R7 2.2MEG. 22,000, VOL. CONTR. I RR RIT 4T60,000ASECT, Ia000. Na., 250,000A TOTAL 3 / - C30 .OIS MFD. D Pie MEG 44. C31 .oOS y a F z R9 2.2 MEG. OPEN LINK FOR PHONO. C20 OUTPUT .01 DA FD. 6F6G ly I = C21 270 MMF RIO 270,000, C2

17、2 MF C13 p = 0.25 14 MED. P-134160-6 R5 5600A 53 10.1, 13.3A-25, ( 1214 10 MEG. RED C23 005 MFD. 376A REO Pi 390,000, T GREEN RED D 1 BLACK GREEN BROWN 175n -SO, 1110K -25, BROWN BROWN -BLACK TO HEATERS arm, Stock No. 14380, and pulley, Stock No. 30587 Shaft-Drive pulley and knob shaft-fastens on ra

18、nge -switch shaft Shield-Radiotron shield Shield-I-f transformer shield can Socket -3 -contact speaker cable socket Socket-B-contact tube socket Socket-Dial lamp socket Spring-Retaining spring for core, Stock No. 12006 Spring-Tension spring for pointer cord Spring-Tension spring for idler pulley Swi

19、tch-Range switch (S1, S2) Tone control and power switch (R18, S3) Transformer-First i -f transformer (L11, L12, C14, C15) Transformer-Second i -f transformer (L13, L14, C19, C27, C28, R7) Transformer-Power transformer, 105-125 volts, 25-60 cycles (T1) Transformer-Power transformer, 105-125 and 200-2

20、50 volts, 50-60 cycles (T1) Volume Controls (R8) SPEAKER ASSEMBLIES (RL -63F-1) Board -3 -contact speaker terminal board Cap-Cone center dust cap Coil-Field coil (L16) Coil-Hum neutralizing coil (L17) Cone-Speaker cone and dust cap (L15) Plug -3 -contact male plug for speaker , Speaker-Complete Scre

21、w-Screw, washer, and lockwasher to hold core in yoke Transformer-Output transformer (T2) Washer-Spring washer to hold field coil MISCELLANEOUS ASSEMBLIES Escutcheon-Dial escutcheon and crystal Knob-Tone control, volume control or range switch knob Knob-Station selector knob Screw-Chassis mounting screw and washer as - sembly Spring-Retaining spring for knob, Stock No. 13907 Spring-Retaining spring for knob, Stock No. 31743 收音机爱 好者资料库 RadioFans.CN