General-Electric-Co-TU222-2 电路原理图.pdf

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1、VOLUME R-25, MOST-OFTEN-NEEDED 1965 RADIO SERVICING INFORMATION GENERAL ELECTRIC (Continued on pages 46-47) TU222 STRINGING DIAGRAM 3 TURNS TUNING SHAFT TUNING GANG FULLY CLOSED SEC ADJ 10.1 cJ SEC ADJ 10.7 IUZZZ AM-FM FM STEREO TUNERS SEC ADJ 10.7 *lf. SEC ADJ 10.7 ml TU222-1 TU222-2 TU222-3 TU222-

2、5 TU222-8 TU222-9 TU222-10 TU222-11 TU222-12 PRI ADJ 10.7 MC. / 67KC_|L9 - / FILTER (U-L7 - /coil / TT r (STORE CASTj/ LJ / 19 KC / FM STEREO / / PRI ADJ 45? tc/ Sr-if1 2ND |TI /r4 / /J2/1 / PRI ADJ- 10.7 me PRI ADJ | ic. 7 me. 1 -/- LB SEC ADJ X,_A 455 *c. /TT -U 38KC I l COIL -RF CHDKE COIL i FM S

3、TEREO DETECTOR CIRCUIT AM OSCILLATOR ColL Aor flr -FM RF TRIMMER SB Me. _AM RF TRIMMER /fczo kc. - PRI ADJ to. 1 MC. |-L4- Atf. At 106 AlC. , UZO KC. AM OSCILLATOR TRIMMER FM MIXER COIL / M DSCILLATOR CDIL / PLUG -V ALIGNMENT POINT LOCATIONS TOP VIEW L5 AM R 34 (POT) GREEN 1 LOOP ANTENNA 1 l 1 TO -P

4、IN II REAR TO PNI|2FTTONT 8 rear TO PIN 5 REAR BOTTOM VIEW 45 收音机爱 好者资料库 RadioFans.CN VOLUME R-25, MOST-OFTEN-NEEDED 1965 RADIO SERVICING INFORMATION GENERAL ELECTRIC TU222 AM-FM Tuner Diagram TO PWR LINE (ON SOME O . MODELS) S 470- 7/jbs4y I Li( i FM RF AMP 6GM6 FM:1000jjV 10 470 FM-.lOOuV 3 |h68V

5、(Rl) 100K (C5) .005 535) 100K FM AFC B6EZ8_ 37i7- 100K 100 1.2V11 1000 I 220? 1 10.7MC | 1 I . 10.7MC | jl BOT TOP ! 1 i / 4!*-.6Vl/ o o i i r 5 *99V ;2 BOT TOP 1 4Sl*99V 1 1 1 1 | If t 31 c) ! z. o ozi: - rTT 1 -J-8 jo t J; | v 34 1 -1 8|_ 1 -i 1 1 -3j VjTm 1 1 1 I_ 1 4 ! (C9) J-005 (07)-3 N750 (R4

6、) 47K 455KC * TOP BOT i i : .001 (R2K100K .02 (C6): 220 W FM 0SC (V2JC 6EZ8 I AM C0NV I2BE6 8j*7aVllie_.9V 5|-727V _ 10 N1500 0)Sk N750 A Wp=gN6 mi2iv N750 22K I ?frG K=l, 000, Meg=l, 000,000 - All DC voltages measured with respect to ground using a VTVM. Line voltage maintained at 120 VAC. Taken in

7、 FM position, no signal applied. Taken in AM position, no signal applied. * Measured with 470KQ resistor in series with DC probe of VTVM. FM-IF sensitivities are uVinputsfor -1VDC on limiter grid. AM-IF sensitivities are pV input ( 30% mod., 400cps) for lOOmv output. Capacitor values more than 1 in

8、mmf. Capacitor values less than 1 in mfd,unless otherwise noted. Resistors are 10%, 1/2 watt, unless otherwise noted. a Approximate value when receiving FM Stereo station. _1000_/_ TO C46 FMAMP )IA I2JN8 T 01 2|*I04V meg (R20K 4 7(/S- | 4MFT 21)2 (R27) 15k: UOVAC _ IbLKi (C42).01 12.4 VAC_=fr53X I A# 12 i i 3/Mazda i (jy?22-!0zan2)_I i_(_TU222-|,-2,-3,-5,-8,-9) 46 收音机爱 好者资料库 RadioFans.CN VOLUME R-25, MOST-OFTEN-NEEDED 1965 RADIO SERVICING INFORMATION GENERAL ELECTRIC TU222 A.M-FM Tuners, Continued I 47 收音机爱 好者资料库 RadioFans.CN