Sylvania-Electric-Products-3406 电路原理图.pdf

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1、140 C2340MFD3V 收音机爱 好者资料库 RadioFans.CN VOLUME R-20, MOST-OFTEN-NEEDED 1960 RADIO SERVICING INFORMATION SYLVANIA Chassis 1-635-1, Model 4703, Material continued on next two pages. RECORD COM* TONE AM/FM TUNINO SYLVANIA Chassis 1-616-2, Model 3406, Alignment (Continued) CHASSIS REMOVAL locted V h 1. R

2、emove volume and tuning knobs by pul ling straight out. 2. Unsnap buttons securing back flap, lift flap and remove large battery case as far as leads permit. 3. Remove four (4) nuts and insulating washers securing chassis to case, (2) 4 1 I A U II P U 7 located left edge of board, (1) located center

3、 of board and (1) located lower , . right corner of board. Remove chassis from case. (Speaker and clock lead lengths permit removal of chassis from lap, lift case without unsoldering. If necessary y case as to remove chassis from case completely, identify all leads, unsolder speaker isulating leads

4、at speaker, clock leads at ter- case, (2) minals on chassis. ALIGNMENT PROCEDURE- ALIGNMENT SETUP NOTES Set variable tuning ca pacitor plates fully open (minimum capacity). TEST EQUIPMENT HOOKUP SIGNAL GENERATOR - radiate signal to receiver through a loop consisting of several turns of wire in serie

5、s with a ISO Ohm resistor. Set gen erator frequency at 455 KC. ADJUST FOR MAXIMUM VOLUME In order shown T4, T3, T2 Repeat for optimum perfor mance . Set dial to approximately SIGNAL GENERATOR - radiated C4 (oscillator trimmer) 16 50 KC. to receiver as in step 1. Set generator frequency at 1650 KC. S

6、et dial to a frequency between 1400 KC and 1500 KC. dial to 600 KC SIGNAL GENERATOR - radiated C2 (antenna trimmer) to receiver as in step 1. Set generator to a frequency corresponding to receiver dial (until signal is heard) through receiver speaker.) SIGNAL GENERATOR - radiated LI (oscillator coil) while to receiver as in step 1. simultaneously rocking Set generator to 600 KC and tuning capacitor through the tune for maximum volume. 600 KC position. 141 收音机爱 好者资料库 RadioFans.CN