Emerson-Radio-and-Phonograph-Corp-702B 电路原理图.pdf

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1、MANUAL OF 19S2 MOST-OFTEN-NEEDED RADIO DIAGRAMS Emerson Radw Models 653B and 702B, Chassis 120136-B. See next page for circuit diagram. ALIGNMENT To set pointer, turn variable condenser fully closed and set pointer at mark near left end of dial backplate. Use isola- tion transformer if available. If

2、 not, connect a 0.1 mfd. condenser in series with low side of signal generator and chassis. Volume control should be at maximum position; output of signal generator should be no higher than necessary to obtain an output reading. Use an insulated alignment screwdriver for adjusting. I2BA6 50B5 FOR PR

3、OFESRIORAL SERtICEMEK &tor 1/10 IFrd COTV- densr to rclver chMSis. Adjust sl/cnsl generstor to 455 kilocycles snd adjust both I.F. transformers for waxliBum signal. Open the receiver variable condenser for minimum capsclt/. Set signal generator at 1720 iclloccles. Peak oscillator denser for maximum signal. Nest set signal generator at 1500 kilocycles. Tune In this signal. Adjust R.F. section of receiver variable condenser for maxlraiw signal strength. Keep the signal generator output as low as possible when making all of MODEL 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN