Packard-Bell-Co-5R1 电路原理图.pdf

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1、VOLUME R-17, MOST-OFTEN-NEEDED 1957 RADIO SERVICING INFORMATION MODEL 5 R 1 TABLE MODEL RADIO /?BE6 I2BA6 I2AV6 50C5 The olignment of the set is occomplished by following the steps in the chort below. Connect output meter to speoker voice coil. Use isololion transformer, if ovoiloble, for shock prot

2、ection. Eoch odjustment should be mode using o minimum in put signol. Connect test oscillotor through o .01 mfd copocitor to the point indicoted below. Ground leod of oscillotor is connected to B minus bus. s CONNECT TEST nsrh,ato. *adi DIAL OSCILLATOR TO ?reou*NCT SETTING ADJUST 1. Pin 1, V-1 455 K

3、c. 540 Kc. S-1, S-2, S-3, (1 2BE6) & S-4 for MAX. 2. Antenno Clip 1620 Kc. 1620 Kc. S-5 for MAX. 3. Antenno Clip 1500 Kc. Tune to S-6 for MAX. Osc. Signal 1. Line voltoge, 1 17 volts AC. 2. Volume control ot maximum. 3. VTVM between socket terminal and B minus bus. 4. Only DC voltoges measured. Allo

4、w 10% tol- eronce. SPECIAL SERVICING INFORMATION: DC RESISTANCE MEASUREMENTS: 1st l-F Coil: Primory, 1 2 ohms Secondory, 1 3 ohms 2nd l-F- Coll: Primory, 1 3 ohms Secondory, 1 3 ohms Oscillator Coil: Primory, 1 ohm Secondory, 5.5 ohms Loop Antenna: Resistonce, 1 ohm OSCILLATOR CATHODE VOLTAGES: (Meosured using AC vocuum tube voltmeter with on input impedonce of more thon 10 megohms. Line voltoge 11 7 volts AC.) 1500 Kc. 2.6 volts AC (rms) 1000 Kc. 2.3 volts AC 750 Kc. 2.1 volts 540 Kc. 2.0 volts 92 收音机爱 好者资料库 RadioFans.CN