RCA-Victor-Co-Inc-8C 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 & 10B BROWN HI -VOLTAGE SEC. BROWN BROWN -BLACK BOTTOM VIEW C1 10 MFD IN PSU 8A & BB 25 MFD IN PSU 10A L 108 m 0 w LUE BROWN HEATERS BLUE 1 BLUE BLACK BLACK Schematic Circuit Diagram of Power S upply Units PSU 8A, 88,10A , and 108 C

12、HECK PREVAILING LINE VOLTAGE AND MOVE JUMPER TO CORRESPONDING CONTACT. (JUMPER CONTACTS ARE UNDER LID ON -TOP OF POWER TRANSFORMER) T -1I 210 20.1 40 li) -GREEN 110 YELLOW -i ISO Q -RED YELLOW 125 0 -BLACK ED BLACK PRI. CONNECT HERE FOR 110 V. SUPPLY FOR VICTROLA MOTOR A.C.SUPPLY PLUG I L_ REE RECTI

13、FIER TUBE - 5Y3-G IN PSU BC 5U4 -G IN PSU 10C BROWN HI -VOLTAGE SEC. ROWN BROWN -BLACK BLUE BOTTOM VIEW HEATERS BLUE C 10 MFD IN PSU BC 25 MFD IN PSU 10C BROWN BLUE BLACK BLACK FRONT VIEW OF RECEPTACLE POWER RECEPTACLE (WIRING SIDE) M-417296 + W FRONT VIEW OF RECEPTACLE POWER RECEPTACLE (WIRING SIDE) M-417297 Schematic Diagram of Power Supply Units PSU 8C and 10C 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN