Sylvania-Electric-Products-3302 电路原理图.pdf

《Sylvania-Electric-Products-3302 电路原理图.pdf》由会员分享，可在线阅读，更多相关《Sylvania-Electric-Products-3302 电路原理图.pdf（2页珍藏版）》请在收音机爱好者资料库上搜索。

1、VOLUME R-16, MOST-OFTEN-NEEDED 1956 RADIO SERVICING INFORMATION SYLVANIA Electric Products CHASSIS: 1-610-1 , 1-611-1 (Alignment on next page at right) MODELS: 3201 SERIES; 3302 SERIES Electric Products on next page at right) Vi IRS OSGl/MIX. V2 _ IU4 v. IF AMR i i KXJK mu C5= 47fjpfd ifjiEi L3 osc.

2、 003 avc.4-o.cv to -*jbv* V3 r IU5 DET., AVC. B t 1 51 AF AMR - V4 3V4 AF OUTPUT *- T3 .-R7 ! i la El : 47QK | TI |T L fllA ISA |p - MO I -X 4MV LCID J r6 r021 meg. .01 02 CI3 150 ISO pjjfd ppfd. 3.3 MEG. I* -J n CI7A a zk 50 T* fyfd 1 r* r-i 2?on | nb v v: A- -L- J l 25V. _NEGATIVE V I. VOLTAGES ME

3、ASURED TO NEGATIVE B USING SYLVANIA VTVM. POWER SOURCE 117 VOLTS 60 CYCLE AC. Z TUNING CAPACITOR PLATES FULLY CLOSED. VOLUME CONTROL SET TO MINIMUM. 3. VOLTAGES B RESISTANCES SKWN ARE AVERAGE READINGS. VARIATIONS MAY BE NOTED DUE TO NORMAL PRODUC TION TOLERANCES 4. VOLTAGES B RESISTANCES ARE NOT SHO

4、WN WHERE TOO SMALL. 5 VOLTAGES MARKED #ARE WIDELY VARIABLE DEPENDENT UPON SIGNAL CONDITIONS. (TYPICAL AVC BUS VOL TAGE VARIATION +0.6V TO-2.3V. CHASSIS REMOVAL 1. Remove Station Selector knob. 2. ON MODEL 3201 ONLY, remove back cover as follows: a. Insert a pencil or any similar object into the hole

5、 in center at cabinet bottom. b. Depress the spring catch by means of the pencil or similar object and lift back cover simultaneously. 3. ON MODEL 3302 ONLY, open back cover by pushing up on slide catch on rear of cabinet. CHASSIS MOUNTING SCREWS MODEL 4. Remove A battery connectors from cabinet mou

6、ntings. 5. ON MODEL 3302 ONLY, disengage line cord retainer on side of cabinet and remove an tenna connector pins on inside top of cabinet. 6. Remove three (3) chassis mounting screws shown in appropriate sketch below. 7. Remove chassis from cabinet by shifting chassis slightly toward cabinet bottom

7、 and simultaneously by lifting chassis from cab inet. CHASSIS MOUNNG SCREWS MODEL 3F l * .iW 146 收音机爱 好者资料库 RadioFans.CN VOLUME R-16, MOST-OFTEN-NEEDED 1956 RADIO SERVICING INFORMATION SYLVANIA Chassis 1-610-1, 1-611-1, Models 3201, 3302. (Circuit diagram and other service material on the pre ceding

8、 page at left.) STATION _ SELECTOR eu/i ON/OFF a R.S VOLUME LINE CORD RECEPTACLE r trW*JBAT. I- OPER.ONLYl-3 C4 OSC ANT. 0 ( 3V4) AF OUTPUT ranR5V lilifioscyMlXr JIF AMP, LI ANT. (1-SlO-l ONLY) (LOCATEO IN CARRYING HANDLE ON 1-611*1.) L2 ANT. Z* LOADING COIL (1*611*1 ONLY) TOP PARTS LAYOUT Rl ALIGNM

9、ENT PROCEDURE Remove radio chassis from cabinet. On Model 3302, remove handle and antenna as sembly and connect to chassis. Set signal generator for an RF output signal amplitude modulated (AM) by 400 cycles. Use either an audible check or an AC volt- I meter connected across speaker voice coil to i

10、ndicate output. Adjust Volume control to full volume. . / V3 Tmus a p-hOEt.AVC . JJaii af 0 4111 y u BOTTOM PARTS LAYOUT ALIGNMENT SET-UP NOTES TEST EQUIPMENT HOOK-UP A0JUST Set variable tuning capacitor plates fully closed (maximum capacity). SIGNAL GENERATOR - hot lead through. 1 mfd. capacitor to

11、 pin 6 of VI (1R5); ground lead to negative B. Set generator to 455 KC. AC VOLTMETER - across speaker voice coil. T2-D for MAXIMUM output. T2-C for MAXIMUM output. Tl-B for MAXIMUM output. Tl-A for MAXIMUM output. REPEAT for optimum per formance. Set variable tuning capacitor plates fully open (mini

12、mum capacity). 3. Set variable tuning capacitor plates so plates are meshed approximately 3/16 inch. Ad just this setting slightly to eliminate any interfering sig nals. Set variable tuning capacitor plates fully closed (maximum capacity). Repeat step 3. SIGNAL GENERATOR - hot” lead through. 1 mfd.

13、capacitor to pin 6 of VI (1R5); ground lead to negative B. Set generator to 1620 KC. SIGNAL GENERATOR - radi ate signal to receiver through a loop of several turns of wire. Set generator to a fre quency corresponding to re ceiver tuning capacitor set ting (until signal is heard through receiver speaker). SIGNAL GENERATOR - hot lead through. 1 mfd. capacitor to pin 6 of VI (1R5); ground lead to negative B. Set generator to 540 KC. C4 for MAXIMUM output. C2 for MAXIMUM output. L3 for MAXIMUM output. 147 收音机爱 好者资料库 RadioFans.CN