RCA-Victor-Co-Inc-55F 电路原理图.pdf

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1、MANUAL OF 1946 MOST POPULAR SERVICE DIAGRAMS rcaVICT0R 55F and CV-42 Electrifier Chassis No. RC-1004E; Mfr. No. 274 Alignment Procedure Cathode Ray Alignment is the preferabte method. Connections foi the oscittograph are shown in the diagram. Output Meter Alignment.If this method is used, connect th

2、e meter across the voice coil and turn the receiver volume control to maximum. Test Oscillator.For atl alignment operations, connect the low side of the test oscillator to the receiver chassis, and keep the output as low as possible to avoid AVC action. Pre-Setting Dial.With gang condenser in full m

3、esh, the pointer should be set at the left-hand end diat calibration mark. Step Connect high side of the test oscillator to Tune test osc. to Turn radio dial to Adjnat the follow ing for maximum peak output I I-F grid in series with .01 mfd. 455 kc Quiet point C14, C15. (2nd I-F Trans.) 2 1A7GT grid

4、 in series with .01 mfd. and 750 kc C12, C13 (1st I-F Trans.) 3 Antenna terminal in series with 200 mmfd. 1,720 kc Tuning condenser rotor plates all out C17 (osc.) 4 1,300 kc 1,300 kc signal C9 (ant.) 5 455 kc Quiet point between 550 and 750 kc Adjust C22 for minimum output on strong 455 kc signal DO NOT CONNECT TO dROUNO WHEN U9INO *eitCTR|F|SR 1N5GT R.F IA7GT 1ST DET & OSC IN5GT I.F. 1H5G7 2nd OET-AF. & AVC. 355QT OUTPUT 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN