Emerson-Radio-and-Phonograph-Corp-120085A 电路原理图.pdf

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1、DRIVE SHAFT MANUAL OF 19S0 MOST-OFTEN-NEEDED RADIO DIAGRAMS EMERSON RADIO MODEL: 613 CHASSIS MODELS 120085A RedB+ WhiteB VOLTAGE READINGS Complement: Replace A” battery with standard D flashlight cell. Replace B” battery with 67 V2 volt Eveready No. 467 or equivalent. The color coding of the battery

2、 cable is as follows: SYMBOL YellowAr BlackA PIN 5 PIN 6 PIN 7 1R5 1U4 2.8 1U5 0 3V4 or 3Q4 4.0 Socket connections are shown as bottom views. Measurements are taken from socket pin to chassis r-.f PEAKEO AT *55 K.C -s VM”_ / V * IU4fA;-3l v-3 IU5 V.4JVS n=n . /k. Hruvn 2- IJ1 o J X 005 MFC* S T- o -

3、u O T* .05 ro. C =? O O _.J_A v2 1l = -i-ioo y 1 l * 3!. J_, 1 r U4 1R5 iu5 t ALIGNMENT PROCEDURE -:- V HhZ o!ZLfJWer wh? T,Ubh Whe.n a c- Power “ connect the Une cord through an isolation transformer if avail- able. Otherwise connect a 0.1 mfd. condenser in series with the low side of the signal ge

4、nerator and B . 2. Set the volume control at maximum. The output of the signal generator should be no higher than that necessary to obtain an output reading. Attenuate the signal input as alignment proceeds. Use an insulated alignment took * 3. Maintain the loop in the same position relative to the

5、chassis as when the receiver is in the cabinet. 4. Oscillator and antenna trimmers are reached from bottom of chassis. 200 mmf. DUMMY SIGNAL SIGNAL ANTENNA GENERATOR GENERATOR COUPLING FREQUENCY 0.1 mfd. High side to grid 455 KC (pin 6) of Vl (1R5). Low side to chassis. High side to external antenna

6、 lead. Low side to chassis. 1620 KC. 1400 KC. RADIO DIAL SETTING Variable condenser fully open. Variable condenser fully open. Tune for maximum output. OUTPUT METER Across voice coil. Across voice coil. Across voice coil. ADJUST REMARKS Primary and Adjust for maximum secondary of output. If ax. is used, T2 and Tl. without an isolation transformer, reduce dummy antenna to 200 mmf. Oscillator Adjust for maximum trimmer on output. ClB. Antenna trimmer on CIA. Adjust for maximum output. 收音机爱 好者资料库 RadioFans.CN