RCA-Victor-Co-Inc-X-55 电路原理图.pdf

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1、PAGE 524-C MODEL X55 Chassis No. RC -473A Five -Tube, Single -Band, AC -DC Superheterodyne Receiver Electrical and Mechanical Specifications FREQUENCY RANGE 540-1,720 kc POWER SUPPLY RATINGS INTERMEDIATE FREQUENCY Number of Push Buttons TUBE COMPLEMENT (1) RCA -12S7 (2) RCA-12SK7 I -F Amplifier (3)

2、RCA-12SQ7 Second Det., A -F and A.V.C. (4) RCA-50L6GT Beam Power Output (5) RCA-35Z5GT. Rectifier Cabinet Dimensions (inches) 9-7/16.151.7 DIAL LAMP (1) Mazda No. 51, 7-5 volt, 0.2 amp. Chassis Base Dimensions (inches) 2-3/16.12.51 Overall Chassis Height 61 inches Weight (net) Six 455 kc A -C Rating

3、 105-125 volts, 50-60 cycles, 35 watts D -C Rating 105-125 volts, direct current, 35 watts LOUDSPEAKER (RL 85-2) First Detector -Oscillator Type 5 -inch permanent magnet dynamic Voice Coil Impedance 4.5 ohms at 400 cycles Height Width Depth POWER OUTPUT (125 volts, 60 cycle supply) Undistorted 0.8 w

4、atts Maximum 1.4 watts o Ao BOTTOM VIEW Or TUBE SOCKETS. LOOP In b GREEN 4 e LOOP ANTENNA TERMINAL BOARD ON CHASSIS I257 IsT GGtET.-050. 1ZSK7 I.F. = Af C3 12 pounds Weight (shipping) 14 pounds Tuning Drive Ratio 10 to 1 2 DETQ-AVO. 2N0.LFTRANS 6RN rix C4 ECK 4.7 ERG M% 47000 VOLUME CONTROL I MEG. 1

5、 I 150 I I 005 1 OPEN LINK row MONO. 10HE ULTRIT 01 C7R0oA0 uepoo BOTTOM VIEW OF TUBE SOCKETS I INDICATES CHASSIS ATHODE CURRENTS (I) 12SAT 10.2 MA. (O 125K7 -16.9 MA. (3) 125Q7 _.0.14 MA. (47 50L66T 40.6 MA. TOTAL B CURRENT 68 MA. -n 117Y. 51 i Q :V swITcN oN a JJ,CNfR. 08CILLO?RAPI-1 CONNECTIONS V

6、ERTICAL HI Tb THIS TERMINAL VERTICAL *0 TO GROUND BINDING POST Schematic Circuit Diagram GREEN 1- 015 L K 1000 its sewDT : MFD. MITIren 1e4 g,.,X: ;:.lt, sJ SOIL PERMANENT- MAGNET DYNAMIC SPEAKER 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

7、 525-C X55 Alignment Procedure Cathode -Ray Alignment is the preferable method. Connections for the oscillograph are shown on the schematic drawing. Output Meter Alignment.-If this method is used, connect the output meter across the voice coil, and turn the receiver volume control to maximum. Test O

8、scillator.-For all alignment operations, connect the low side of the test oscillator to the receiver ground binding post, and keep the oscillator output as low as possible to avoid a -v -c action. Calibration Marks.-The tuning dial is fastened in the cabinet and can not be used for reference during

9、alignment. Therefore calibration marks have been stamped in the plate on the front of the chassis as shown in the accompanying drawing. These marks are used for reference during alignment. Dial Indicator Adjustment.-With the gang condenser in full mesh. the indicator should be set to the extreme lef

10、t(low frequency) mark on the dial scale. Steps Connect the high side of the test-osc. to -peak Tune test osc. to- Turn radio dial to Adjust the follow - ing for maximum output 1 Ant. terminal 455 kc Quiet Point between 1,720-1,600 kc C3 and C4 (2nd I -F trans.) 2 Ant. terminal Cl and C2 (1st I -F tr

11、ans.) 3 Ant. terminal in series with 200 mmfd. 1,500 kc 1,500 kc calibration mark C6 (osc.) C6 (ant.) 4 600 kc 800 kc calibration mark Ll (osc.) (Rock in) 5 Repeat step 3. After mounting chassis in cabinet, check the dial calibration on stations of known frequency. If calibration is not correct, mov

12、e pointer to agree with dial calibration. Note.-Oscillator tracks above signal. Adjustments For Push -Button Tuning The push -buttons should be adjusted for six favorite stations after the receiver has been operating for a brief warm-up period. Each button may be set up to any standard broadcast sta

13、tion. The prefer- able 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. Turn the accessory switch to Radio position and accurately tune in the station for

14、which the first button is to be set. 3. Press in push-button rod No. 1 (left) with the screwdriver, as far as it will go without undue pressure, hold in, retune station with manual control if necessary fo; beat reception, and then carefully tighten up the rod. Do not tighten more than 3 turn after t

15、he 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. SET POINTER y LEFT OF THIS MARK. s Dial -Indicator and Drive Mechanism Cs 1500 SC Lt OSC. 600 KC VOL. CONTROL 51 POWER SW. 2aP

16、DET AF-AVC Tube and Trimmer Locations ,.-TERPA. BOARD REAR or CHASSIS SHIELD TAPE EO OREEN YELL STOCK NI 9E24 SWITCH (REAR view) PHONO POSITION K-86107 Record .Player Connections, TO RECORD PLAYER Using a No. 9824 Switch REPLACEMENT PARTS Insist on genuine factory -tested parts, which are readily Id

17、entified and may be purchased from authorized dealers. STOCK No. DESCRIPTION 33719 34024 .34025 CHASSIS ASSEMBLY (RC -473A) Belt-Push button arm adustment belt and rivets Board-Antenna-Ground board Board-Radio-Phono board 33731 Button-Push button 12720 Capacitor -100 mmfd., moulded mica. 12725 Capac

18、itor -150 mmfd., moulded mica 34213 Capacitor -430 mmfd., mica 30433 Capacitor -470 mmfd., moulded mica 14393 Capacitor-.01 mid., 300 volt 11315 Capacitor-.015 mfd., 400 volt 32787 Capacitor-.05 mid., 400 volt 4839 Capacitor -0.1 mid., 400 volt 34505 Capacitor -0.2 mid., 300 volt 34212 Capacitor-Ele

19、ctrolytic comprising 2 sections of 50 mid, each, 150 volts 33724 Coil-Oscillator coil (L1) 33728 Condenser-Tuning condenser and drum assembly 33631 Control-Volume control nd power switch (S1) 32634 Cord-Tuning condenser drive cord 33633 Indicator-Station selector pointer 11765 Lamp-Pilot lamp-Mazda

20、No. 51. . 33721 Loop-Antenna loop 33727 Plate-Dial plate frame 30880 Resistor -150 ohm, j W. 30152 Resistor -1,000 ohms, 1 W. 12454 Resistor -33,000 ohms, W. 12412 Resistpr-47,000 ohm, W. 12264 Resistor -220,000 ohms, W. STOCK No. DESCRIPTION 12285 30271 13601 33735 33725 31365 31319 33720 31418 337

21、22 34028 33726 32907 34554 34802 34803 31456 33729 33637 30883 30900 33973 Resistor -470,000 ohms, W. Resistor -4.7 megohm, W. Resistor -10 megohm, I. W. Screw-Push arm lock screw Shaft-Tuning condenser drive shaft and retainer Socket-Lamp socket Socket-Tube socket Spring-Push button arm return, spr

22、ing Spring-Tuning condenser drive cord spring. Transformer -1st i.f. transformer Transformer -2nd i.f. transformer Washer C washer for drive shaft SPEAKER ASSEMBLIES (RL 85-2) Cap-Cone center dust cap Cone-Speaker cone and voice coil Speaker -5 -inch permanent magnet-less trans- former Transformer-O

23、utput transformer MISCELLANEOUS ASSEMBLIES Cover -8 protective coven for push-button markers Dial-Glass dial scale Escutcheon-Dial and button escutcheon Knob-Tuning, volume control, or power switch knob Spring-Retaining spring for knob or button Marker -1 set push-button marker 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN