RCA-Victor-Co-Inc-10Q1 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 but with low line voltage, it may be necessary to turn the plug to OLD after a time corresponding to a small fraction of the total life of the vibrator. Testing.-The simplest way to check PSU 8E or 10E is to plug it into a receiver

12、for which it is designed. (First check the position of the links tor the particular line voltage.) Note whether the dial lamps in the receiver light with normal brilliancy, and measure the rectified B voltage at the receiver to determine whether it is normal. If a receiver is not available, dummy lo

13、ads may be connected to the unit as specified in the table below. The supply current must be measured with a d -c ammeter, not a meter of the ac -dc type, inasmuch as the r.m.s. value of the cur- rent is considerably higher than the d -c current. The heater voltage must be measured with an r.m.s. me

14、ter (thermo-coupled), not with an average meter (rectifier type), on account of the square wave shape. It an accurate thermo-coupled meter is not available, the heater voltage may be checked by observing the brilliancy of the dial lamps in the receiver. They will glow dull or red if the heater volta

15、ge is low. Precautionary Lead Dress. - (1) Dress all leads on the power transformer primary and the buffer capacitors away from the line chokes. (2) Leads to C19 must be as short as possible. (3) The rectifier filament leads should be run close to each other, and dressed away from the filter chokes.

16、 (4) D -C power cord must not touch power transformer. (5) Keep antenna and ground leads away from PSU and PSU cables. PSU Supply Volts DC Heater Load (ohms) Rectifier Load (ohms) Supply Current D -C amps. Heater Voltage (A.C.) Rectified Voltage (D.C.) Used With Models Max. Min. Max. Min. 8E 117 2.2

17、 4,900 0.90 7.85 7.1 400 360 8Q1, and 8Q4 234 2.2 4,900 0.50 7.85 7.1 400 360 10E 117 1.4 3,400 1.10 7.4 6.6 400 360 10Q1, 12Q4, 12QK 234 1.4 3,400 .85 7.4 6.6 400 360 NOTE: The heater and rectifier dummy load resistors should be capable of handling 50 watts. Connect the heater load across terminals

18、 1 and 7 on the 7 -contact plug. Connect the rectifier load resistor across terminals 2 and 6 on the 7 -contact plug. Connect a jumper from terminal 2 to 3, and from 4 to 5 on this plug. Check position of links before turning power on. Replacement Parts Insist on genuine factory -tested parti, which

19、 me readily identiRed and may be purchased born euthorired dealers. STCoK DESCRIPTION S TOC No K DESCRIPTION DC .POWER SUPPLY 32053 Coil-Choke coil (L8) (PSU -8E and PSU -10E) 5140 Fuse -5 amp, fuse 30557 Plug-Fused plug less fuses and power cord 12952 Capacitor -330 mmfd. (C19) 32052 Plug -6 -conta

20、ct power change plug 4937 Capac tor-.01 mfd. (C9, C10) 14409 Plug -7 -contact female plug for power supply 14626 Capacitor-.07 mfd. (C13, C14, C17) cable 4839 Capacitor -0.1 mfd. (C8) 32064 Resistor -0.47 ohms, flexible type (RS, R4). 12484 Capacitor -0.25 mfd. (C1, C2, CS, C4, C5, C6) 4687 Resistor

21、 -1,000 ohms, 4 watt (Rl) 32049 Capacitor-Comprising two sections of 0.5 mfd. 11768 Resistor -4,700 ohms, 2 watt (R2) each (Cil, C12) 32051 Socket -6 -contact power change socket 32048 Capacitor -5 mfd. (C7) 31251 Socket-Tube socket 32047 Capacitor -Comprising one section 10 mfd. and 14312 Socket-Vi

22、brator socket one section 20 mfd. (C15, C18) 32062 Transformer-Power transformer (PSU -8E only) 32045 Capacitor -15 mfd. (C16) 32083 Transformer-P owe r transformer (PSU -10E 32048 Coil-Choke coil (L1, L2, L3, L4, L5, L8) only) 31794 Coll-Choke coil (L7) 32050 Vibrator RCA VICTOR DIVISION OF RADIO C

23、ORPORATION OF AMERICA, a CAMDEN N. J., U. S. A. 收音机爱 好者资料库 RadioFans.CN PAGE 21.4-C PSU 8E & !O E 8 TERM. 1 BRD. ELECT CAP RECTIFIER 5W4 IN PSUBE 5T4 IN PSUIOE N7, 41: r L5 N -BROWN Lz CRI IN -YELLOW RED H ENo2 CREEN 0 TI POWER TRANSFORMER BROWN LLTI o NEW. YELLCW-GRE C7 ELECT CAP. R C RED BLOC RE Y

24、EL.W -BLUE- BLALA LINK BOARD - - roe CHANCING LRCM 1) TO 234 v15 SOGRT a BOTTOM VIw OF eRRVO RLw VIBRATOR PLUG Recommended Changes: (a). Replace paper condensers, Stock No, 32049 (C-11 and C-12) on the earlier models with a new type oil capacitor now carried under the same stock number and incor- po

25、rated in units of later production. (b) The transformer primary leads should be reversed so that the black with red tracer lead goes through R-3 to terminal No. 1 on the vibrator socket and the Yellow lead through R-4 to terminal No. 6 of the vi- brator socket. (c) An insulative sheet is to be added

26、 to the bottom cover under the 4,700 ohm (R-2) resistor. (d) Precaution should he taken to dress parts and leads to clear chassis and bottom cover. (e) Three ampere fuses are now being recom- mended for 220 -volt operation. They are carried as Stock No. 10907. L6 TERM BAD ASAAE ANA ASLoof .8431 Abov

27、e- Bottom View of D -C Power Unit Below- Schematic Diagram VIBRATOR- PLUG SOCKET SHOWN WITH PLUG INSERTED IN a NEW POSITION 1C-2 0 2 T MFD. NOTE:- L I TO L-6 JNCLUSIVE 0.3 n 350 MM. L -I L-2 L-3 C -I 0.25 MFD. 0M.25FD. C-8 MFD. C-7= MFD. C-3 C -S 0.25 =0.25 MFD. MFD. NOTE:-VIBRATOR & RECTIFIER SOCKE

28、TS SHOWN BOTTOM VIEW DC.RESISTANCES T-1 PRIMARY NO.1 PRIMARY NO.2 HI -VOLTAGE SECONDARY PSU 8E 53n 58n 790n PSU 10 E 23n 27.s. 440n VIBRATOR 8 C-6 0I MFD C10 .0 MF1D. C-9 OI MFD. T BLK: RED T Rl PRI. I PRI. w2 TEL. 2 9 3 C -I I =0.5 MFD. O I C-12 4 II 0.5 1-MFD. O 5 12 O O LINK. 6 13 TERMINAL BOARD

29、O o UNDER CHASSIS 7 14 FOR CHANGING FROM 117 TO 234 VOLTS ED RED a GRN. BROWN BRN BROWN TEL. IO RECTIFIER 5W4 IN PSU 8E T4 IN PSU.IE C-19 C-13 .07 MED. L 7 PLUG z CONNECTOR l9 (TERMINAL VIEW) C-14 .07 MFD. REE RED,. B C -I5 8.3V. 10 AC. MFD. .024n C-16 15 M.H. IS Ip BLUE6YEL. MFD. C-17 C -I8 - 07 MF

30、D.= Meg. _+ B 10 OB 3II IIo 3211II sII 1111 3II II12 6II4113 150 013 7C I4 70 014 POSITION OF LINKS FOR OPERATION ON IOS -125 VOLTS DC. BROWN FRONT VIEW OF PLUG CONNECTOR POSITION OF LINKS FOR OPERATION ON 210-250 VOLTS DC P-84320 PAGE 286-C MODEL 1001 Chassis No. RC -337B Ten -Tube, Three -Band, Su

31、perheterodyne Receiver PHASE INVERT. Et AUDIO LIT - SEC.ADJ. 456KC LINK TERMINALS FOR RECORD PLAYER 6 3D1.F. TRANS TUNING TUBE 3 2ND I.E. 2NDDET., & A.V. C. C3 C14 6.IMC 6.1 MC I / 1 / I / ANT. COIL 1S DET COIL 1st DEI. C8-6.1 MC 2 2ND IF TRANS. /4 LIS SEC. ADJ. 455 KC 1ST I.F. TRANS. 20MC I in : AN

32、T.GND.1 L13 I POWER SECADJy SUPPLY 4SbKC CONNECTOR Top View, Showing Location of Tubes and Trimmers Electrical Specifications FREQUENCY RANGES Standard Broadcast (A Band) .5301720 kc (566.174 m) INTERMEDIATE FREQUENCY RADIOTRON COMPLEMENT (1) RCA -6K7 R -F Amplifier ( 2 ) RCA -6L7 1st -Detector (3)

33、RCA -6J7 Oscillator ( 4 ) RCA -6K7 1st IF Amplifier ( 5 ) RCA -6B8 2nd I -F amp., 2nd-Det., A.V.C. (6 ) RCA -79 Phase Inverter and Audio Pilot Lamps (2) POWER OUTPUT RATING Undistorted Maximum POWER SUPPLY RATINGS A -C Ratings With PSU 10A Power With PSU 10B Power With PSU 10C Power D -C Ratings Wit

34、h PSU 10E Power , To P e C s crc I ON 0 II SOFT LOUD POWER -TONE RANGE TUNING CONTROL SELECTOR Location of Controls To turn on the receiver, turn the power -tone control fully clockwise, past the snap of the switch. To turn off the re- ceiver, turn this knob fully counter -clockwise. The sensitivity

35、 switch is mounted on rear of chassis. Medium Wave (B Band) Short Wave (C Band) 2 3-7.0 mc (130-42.8 m) 7 0-22 mc (42.8-13.6 m) 455 kc (7) RCA -6F6 -G Power Output (8) RCA -6F6 -G Power Output (9 ) RCA -6U5 Tuning Indicator (10) RCA -5U4 -G (In PSU 10A, IOB, 10C A -C power supply unit) Rectifier (10

36、) RCA -5T4 (In PSU 10E D -C power supply unit) Rectifier Mazda No. 44, 6.3 volts, 0.25 amp. 10 watts 12 watts LOUDSPEAKER (RL -63H-4) Type 8 -inch electrodynamic Voice -coil Impedance at 400 cycles 2 2 ohms Volts Cycles Supply Unit 105-125 50.60 Supply Unit 105.125 25-60 Supply Unit 105.130, 140-160

37、 50-60 200-225, 225.250 Supply Unit 105-125, 210.250 D -C VOLUME CONTROL Plug for Extension Loudspeaker.-A two -contact female socket, equipped with a male plug, is connected across the secondary of the output transformer on the loudspeaker to facilitate the connection of an extension loudspeaker if

38、 desired. A permanent -magnet dynamic speaker, with voice -coil impedance of not less than 2 ohms is recom- mended. An extension speaker with 2 -ohm voice coil will receive approximately half the power output of the receiver. With a higher -impedance voice coil, the percentage of power delivered to

39、the extension speaker will be decreased. (A high -impedance magnetic -type speaker may be used in con junction with a suitable coupling transformer such as RCA Stock No. 7853.) The. RCA MI.6248 Alnico 8 -inch di- ameter permanent -magnet dynamic loudspeaker with 2 -ohm voice coil, and 5 -watt power

40、-handling capacity is recom- mended. RCA VICTOR DIVISION OF RADIO CORPORATION OF AMERICA, CAMDEN N. J., U. S. A. PAGE 287-C Alignment Procedure 10Q Cathode -Ray Alignment is the preferable method. Connections for the oscillograph are shown in the chassis drawing. Output Meter Alignment.-If this meth

41、od is used, connect the meter across the voice coil, and turn the receiver volume control to maximum. Test-Oscillator.-For all alignment operations, connect the low side of the test -oscillator to the receiver chassis, and keep the output as low as possible to avoid a -v -c action. Calibration Scale

42、 on Indicator -Drive -Cord Drum.-The tuning dial is fastened in the cabinet and cannot be used for reference during align- ment, therefore a calibration scale is attached to the indicator -drive - cord drum which is mounted on the shaft of the gang condenser. The setting of the gang condenser is rea

43、d 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 frequency calibration scales, refer to the accompanying the dial with 0-180 calibration scales drawn Pointer for

44、 Calibration Scale.-Improvise a tion scale by fastening a piece of wire to the and bend the wire so that it points to the 180 tion scale when the plates are fully meshed. for any setting of the drawing which shows at top and bottom. pointer for the calibra - gang -condenser frame, mark on the calibr

45、a - Dial -Indicator Adjustment.-After fastening the chassis in the cabinet, attach the dial indicator to the drive cable with indicator at the left-hand end marked on the dial scales, and gang -condenser fully meshed. The indicator has a spring clip for attachment to the cable. Steps Connect the hig

46、h side of test-osc. to- Tune test- osc. to- Turn radio dial to- Adjust the following for max. peak output Leave sensitivity switch open (minimum sensitivity) for all alignment operations. 1 6B8 2nd I -F grid cap, in series with .01 mfd. 455 kc C band Quiet Point. L16 and L17 (3rd I -F Trans.) 2 6K7

47、1st I -F grid cap, in series with .01 mfd. L14 and L15 (2nd I -F Trans.) 3 6L7 ist Det. grid cap, in series with .01 mfd. L12 and L13 (1st I -F Trans.) 4 Antenna Terminal, in series with 300 ohms 6.1 mc 6.1 me (29) B band C8 (osc.)* C14 (det.)t C3 (ant.) 5 Antenna Terminal, In series with 300 ohms.

48、20 mc 20mc (23.5) C band C5 (osc.) f t 6 Antenna Terminal, in series with 200 mmf. 1,500 kc 1,500 kc (31) A band C9 (osc.) 7 Antenna Terminal, in series with 200 mmf. 600 kc 600 kc (144.5) A band L7 (osc.)$ 8 Repeat Step No. 6 * Use minimum capacity peak if two peaks can be obtained. t Rock the gang condenser slightly, and use the maximum capacity peak if two peaks can be obtained with trimmer C14. Check to determine that