Galvin-Mfg-Co（Motorola）-8990582 电路原理图.pdf

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1、VOLUME R-19, MOST-OFTEN-NEEDED 1959 RADIO SERVICING INFORMATION MOTOROLA MODEL AMERICAN MOTORS 8990582 MOTOROLA 93MR NOUS CAPACITORS - D*clmjl values unless otherwise specified. VOlfAGCS Measured from poinl Indicated to chassis 101 No signal input INPUT VOLTAGE - MV DC TUNING RANGE 540 KC to 1 KC If

2、 -455KC ALIGNMENT Connect an output meter across the speaker voice coil. Set tone control to high and volume to maximum. Attenuate signal generator output to maintain 1.3 volts on output meter to prevent overloading the receiver. STEP generator CONNECTION GENERATOR FREQUENCY (400 cycle mod) GANG SET

3、TING ADJUST REMARKS *5 r GNMENT 1. 1 Ant recept through I . 1 mf & chassis RF ALIGNMENT 455 Kc Fully open 1. Z, 3 & 4 Peak for maximum. Z. Ant recept through dummy antenna 1605 Kc Fully open 5 Peak for maximum. 3. ii 1400 Kc Tune for max 6 Peak for maximum. 4. 11 600 Kc Tune for max 7 Peak for maxim

4、um while rocking gang. 5. ANTEIS Repeat steps 3 & 4 ui fNA TRIMMER itil no further increai se. The last adjustmc :nt should be the t rimmer (6). 6, Tune to a weak station around 1400 Kc 6 With radio installed in car and an tenna fully extended, peak antenna trimmer for max. 68 收音机爱 好者资料库 RadioFans.CN