Zenith-Radio-Corp-T2546 电路原理图.pdf

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1、ZENITH Chassis 9ZT15, Models Z430, Z434, T2546 (Continued across page) Ql Q2 Q20I F.M. R.F. F.M. CONV A.M-F.M. 1ST. I.F (121-612) (121-613) (121-614) Tt0l,T20l THRU T207 r COLOR CODE . CONV. -257) I X iosr- RI02 i*2$ SW POSITIONS A M. (SHOWN) F H.- AFC FM TRANS TERMINATION BOTTOM VIEW 8+ AFC AUD R30

2、I 470K F.M. ANTENNA COIL F.M. DET. COIL F.M OSC COIL 01,02,0201,0202,0203,0401.0402 NPN 3 COLLECTOR (COLOR DOT| ASE2vhJ BA! EMITTER I 3- COLLECTOR 5V (COLOR OOT) LIOI $-77014 TTFT A.M. ANTENNA REAR VIEW ALTERNATE Q202, Q203 NPN I emitter b,se|3collector EMITTER -START EYELET ON REAR PIN WIND6 TURNS

3、CW X END WITH EYELET ON FRONT PIN WIND I TURN CW B -START EYELET ON REAR PIN -START EYELET ON FRONT PIN. WIND 6 TURNS CW. SILICON PWR TRANSISTOR COLLECTOR (CASE) 180 收音机爱 好者资料库 RadioFans.CN Q202 A.M.-F.M. 2ND. I.F (121-546) ZENITH Chassis 9ZT15, Models Z430, Z434, T2546 F.MRDIF. (Continued from page

4、 180) (121-546) _I L4.F.M. OSCILLATOR -nR502 R50I 6.0K 270_ C50IA TAC50IB 1 20 -i 150 25V 25V V TERMINAL 1 ON-OFF SWITCH ON VOLUME CONTROL R409 i 250K 11 TONE Lcontrol TIOI (LI03), A.HI. OSC. COIL (600 KHz)- T202,1ST A.M.I.F TRANSFORMER(455 KHz)- L203, PRIMARY TOP L204,SECONDARY BOTTOM T201, 1ST(F.M

5、.)I.F. TRANSFORMER (10.7MHz) L20I, PRIMARY TOP L202, SECONDARY BOTTOM/ J BANDSWITCH- TUNING = CIOIC, A.M. OSC. TRIMMER- E *= (1600KHz) i CIOlA, A.M. ANT. TRIMMER fey (1400khz) rgp Q TEST POINTS gpa A FM. ANT. INPUT C REVERSE A6C 1 D 1ST. FM. IF INPUT T E 2N0.FM. IF INPUT 1 F 5R0.FM. IF INPUT Gl RATI

6、O DETECTOR INPUT G2 5RD.T.M. OUTPUT H F.M. OETECTDR OUTPUT u. F.M. ANTENNA COIL J FM. 0+ K A.M. 6+ L A.M.R.F. 0 IF INPUT Ql Q2 i3.5KP IF FREQUENCY AM 455KHZ F M 10.7 MHZ TUNING RANGE. A M 535-I620KH2 F M. OB-IOBMHZ ALL RESISTORS 10% TOLERENCE, 1/2 WATT, CARBON UNLESS OTHERWISE SPEClFiEO RESISTANCE V

7、ALUES IN OHMS, CAPACITANCE IN MlCROFARAOS UNLESS OTHERWISE SPEClFiEO T203,2ND(F.M.JI.F. TRANSFORMER (10.7MHz) L205, PRIMARY TOP L?06,SECONDARY BOTTOM jT204,(L207), 2ND(A.M.)I.F. TRANSF0RMER(455KHz) r-VOLUME CONTROL r-T206 (L2I0) 3RD (A.M.) I F TRANSF0RMER(455KHz) TONE CONTROL lOjQIOI uiui , 205,3RD (F.M.) I.F. TRANS.(K).7MHz) L208, PRIMARY TOP L209, SECONDARY BOTTOM T?07.FM RATIO DETECT0R(l0.7MHz) 181 收音机爱 好者资料库 RadioFans.CN