Packard-Bell-Co-532 电路原理图.pdf

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1、MANUAL OF 1954 MOST-OFTEN-NEEDED RADIO DIAGRAMS Models 531, 532, and 533 SPECIAL SERVICING INFORMATION: DC RESISTANCE MEASUREMENTS: 1 st I- f Coil: Primary, 12 ahms Secondary, 13 ohms 2nd l-F- Coil: Primary, 13 ahms Secondary, 13 ohms Oscillator Coil: Primary, 1 ohm Secondary, 5.5 ohms Loop Antenna:

2、 Resistance, 1 ohm OSCILLATOR CATHODE VOLTAGES: (Measured using AC vacuum tube voltmeter with on input impedance af mare than 10 megohms. Line voltage 117 valts AC.) 1500 Kc. 2.6 valts AC (rms) 1000 Kc. 2.3 volts AC 750 Kc. 2.1 valts 540 Kc. 2.0 volts ALIGNMENT PROCEDURE: The alignment af the set is

3、 accomplished by fallowing the steps in the chart below. Connect output meter ta speaker voice coil. Use isolation transformer, if available, for shack protection. Each adjustment should be made using a minimum in put signal. Connect test oscillator through a .01 mfd capacitor to the point indicated

4、 below. Ground lead of oscillator is connected to B minus bus. CONNECT TEST _ RADIO DIAL OSCILLATOR TO FREQUENCY SETTING ADJUST 1. Pin 1, V-1 455 Kc. 540 Kc. S-1,S-2, S-3, M2BE6) & S-4 for MAX. 2. Antenna Clip 1620 Kc. 1620 Kc. $-5 for MAX. 3. Antenna Clip 1500Kc. Tune to S-6 for MAX. Osc. Signal *9

5、sk *r SJZ r +9S v. jln ij 5 1 51 S T I ! / / / / z_: rC./C/N SOMF SGM(= T- _/SOV /SOV X tZZZXZoXy 1 socs 1 3 4 3 4 4 3 4 j3 Socket voltages measured as follows: 1. Line voltage, 117 valts AC. 2. Volume control at maximum. 3. VTVM between socket terminal and B minus bus. 4. Only DC voltages measured. Allow 10% tol erance. ! Clock Control Circuit of Model 532 /0-/Z0V 60-v ONLY smrcH T/NfR 收音机爱 好者资料库 RadioFans.CN