Magnavox-Co-A551-01 电路原理图.pdf

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1、VOLUME R-25, MOST-OFTEN-NEEDED 1965 RADIO SERVICING INFORMATION A 5 5 1 SERIES AMPLIFIER CHASSIS RI6 R6R c4 C62 A5SI-0I 220 K 220K OMIT OMIT ASS1*02 220K 220K 5MF-23V 5MF-25 V A5SI-0S OMIT OMIT OMIT OMlT TUNER ?S power!? OUTPUT SEE FOR EXTERNAL CHART AMP. (3.-1 L_ CH2 OUTPUT spf FOR EXTERNAL AMP. CH

2、ART CH2 (f pilot input LIGHT %220K * rs3 CHART 1 22K i* Cll l 2 T .01 MF j A 08 T-22 V R60 R63 R6l C6l 47 i 2.7 Ol MF | These amplifiers are the transformerless output type designed to use the speaker voice coil as the load. This type of circuit is quite common in transistor audio amplifiers. The vo

3、ice coil impedance, therefore, plays an important part in the overall operation of the amplifier. The 551 Series Amplifiers utilize eight transistors and two silicon diodes as rectifiers to provide 50-watts of Music PowerOutput (MPO) or 25-watts for each channel. Power is supplied from a 117VAC source. The power transformer is a step-down type designed to provide approximately 36 VDC 300MA after rectification by the two silicon diodes. These amplifiers are designed to work in conjunction with, and supply power for, a separate AM-FM transistor tuner. 61 收音机爱 好者资料库 RadioFans.CN