Admiral-751 电路原理图.pdf

VOLUME R-20, MOST-OFTEN-NEEDED 1960 RADIO SERVICING INFORMATION LI ROD IN EMU 2N412 RF AMP SL-S.4V Admiral r, J* 2N411 NfXER Q2 1 ll i (O ./m ij y fs i 1 410 T R3 vw/- 220 360 5 6B0 R6 5* 560 * NA1CHE0 PAIR 1000 IF-45SRC 4- CHA55IS GROUND COMMON GROUND RE5ISI0RSV2W*TT 10V. CAPACITOR VALUES IN HICR0FARABS URL ESS OTHERWISE SPECIF HO /THIS READING NAT BE OV OR SLIGHT IT NEGATIVE ALL VOLTAGES TAKEN WITH A VTVN -LC5 T-05 hc 2N410 1ST IF 03 * 4 CB sr4= NHF S*A COLOR CBBE DOT COLOR COOES II ORANCE T2 BROWN T3 RfO BOTTOM VIEW Tl T2, 8T3 BOTTOM VIEW 0., L OSEIIli OSCILLATOR COIL 2N4I2 OSCILLATOR UVk 1 -4 R22; 4.3* S C20 410 _HML_ CRIB R2I l5K 7b i JiOOO 5% MODELS 751 757 CHASSIS 8V1 2N4I0 2ND if Q4 RIO 2200 I-U5V (pRI2 A 5T /W !3 , Q4 * IOTAL CURRENT DRAIN WITH NO SIGNAL RNO VOLUME CONTROL SET A1 MINIMUM Mi VOLTAGE DATA Voltages shown measured with no signal, using fresh batteries. Volume control at minimum; dial set at low frequency end. All readings made with VTVM between transistor terminals and B plus (ground). 455 KC. FRONT * IB I * * / / Sy/ 5 . -/f-l -ij , * b -1, l IK y E r View of Etched Wiring Board Gray area represents etched wiring, black symbols and lines represenB components on opposite side. REMOVING CHASSIS FROM CABINET 1. Remove the two knobs plus the two chassis mount ing screws at the bottom of the cabinet, if used. 2. Unsnap back cover and remove battery case. 3. Remove the two nuts at the right corners of the chassis. 2N4I0 O OUTPUT Q2NDIF# Mmatched PAIRK _ |2N408Tf n,N2lFJ|yA) DRIVER LDET Bffil DASHED LINE INDICATES ADJUSTMENT FROM REAR ONLY Transistor and All nment Location: 4. Keeping one hand on front escutcheon, slide chas sis to right to remove from cabinet. NOTE: The left side of the chassis (from rear) is held only by two flanges on the escutcheon and the escutcheon, in some sets, is held only by the chassis under the flanges. w c si ij. Bunnesi r SPSS 14 收音机爱 好者资料库 RadioFans.CN