Sylvania-Electric-Products-U50-4 电路原理图.pdf
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Sylvania-Electric-Products-U50-4 电路原理图.pdf
SYLVANIA MODELS: AK55,AK60, AK70,AT50 Chassis U50-3,4,6 PPl-PLATE AUDIO I-1 I2BA6 1ST If TRANS. ,ST IP 455KC r.rt S R2 <150-0. - I2AV6 p| DET.8ISTAUD. _ _2!1P IF X5ANS- 7 r ?=, MV s- iYLSEiTfc: I i _ 1-J-1 | * ! 0C5 AUDIO OUTPUT BLUE T3 C7 1470K S 4#l Tl BTZ SWI I V BLK _ _ _J Lc9A +Lc9B T3Q_ pso 4-i5ov 4- f5ov 1 f_E 11 MODELS AK60.AK70 TZOK-ICLOCM | * #SWI*1 , ON/OFF - I AC PLUG - C PPl-PLATE AUDIO BETWEEN RES BETWEEN RES BETWEEN RES. zst in. 162 ien i az ten. iaV 35W4 RECTIFIER V 3 12AV6 *e; 0ET/lSTAUDI0lj7 -7 j! S9E rp BOTTOM VIEW STEP TUNING CAPACITOR SETTING TEST EQUIPMENT HOOK-UP GENERATOR FREQUENCY Fully open SIGNAL GENERATOR - “Hot* lead thru a 200pF capacitor to test point (x). Ground lead to chassis AC VOLTMETER - Across speaker voice coil. 455 KC 400 CPS 30% MOD. T2 Bottom Core T2 Top Core 1*1 Bottom Core T1 Top Core ADJUST FOR Maximum Meter Reading SIGNAL GENERATOR - Radiate signal to receiver thru a loop of several turns of wire. AC VOLTMETER - Same as Step 1. 1625 KC 400 CPS. 30% MOD. |C1D| Trimmer Maximum Meter Reading Same as Step 2 Set generator to a frequency corres ponding to receiver tuning capacitor set ting (until signal is heard thru receiver speaker). | C1B | Tiimmer Maximum Meter Reading 153 收音机爱 好者资料库 RadioFans.CN
