Admiral-802 电路原理图.pdf

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1、VOLUME R-19, MOST-OFTEN-NEEDED 1959 RADIO SERVICING INFORMATION Admiral REMOVING THE CHASSIS To remove the cabinet front from the chassis, pro ceed as follows: 1. Remove the battery compartment cover. 2. Remove the batteries. 3. Remove the four Phillips head screws that are visible within the batter

2、y compartment. 4. The tuning knob hub is a thumb screw. Remove it by turning counterclockwise. 5. Remove tuning knob by working it forward and off the tuning shaft. (F) . 2N412 2N4I1 m 2N ST M*|R 1 S ! S 1ST /TS Ql 02 T Q f-ii/ _ - cs _ . i =!; i _ CHASSIS 8M1 MODELS 801 802 808 6. Remove the Philli

3、ps head screw at the left of the tuning shaft. 7. Gently lift the cabinet front from the cabinet back and chassis. To remove chassis from cabinet back for servicing the wiring side of the chassis: 8- Make sure tuning gang is closed. Then remove the two Phillips head screws that are visibleone near t

4、he tuning capacitor and the other in lower left corner as radio is viewed from the front. 9. Lift speaker from cabinet and away from chassis. 10. Gently lift out wiring side of chassis from cabinet. . b)t, . rt .13.,- K2S5 IF * 455 KC common ground b+) * MATCHES PAIR CAPACITOR VALUES IN MICROFARADS

5、UNLESS OTHERWISE SPECIFIED -collector ) TTPUPNP) + EMITTER I. F. 455 KC. EMITTER I (COLLECTOR DASE PNPTTPE TRANSISTOR COLOR CDOES L Tl -GRAY T2 -WNITE ZN406 OUTPUT (MATCHED PAIR) L2 OSCILLATOR COIL Transistor and Alignment Locations VOLTAGE DATA Voltages shown measured with no signal, using fresh ba

6、tteries. Volume control ar minimum; dial set at low frequency end. All readings made wilh VTVM between transistor terminals and B plus (ground). All voltages are negative. LI | ” RI6 1 i |i * X ct5b y)5 ! ! / J R22 1-4 T mm * ccn MOUNTED ON PRINTEO WIRING SIDE View of Printed Wiring Board. Gray area represents printed wiring, black symbols and lines represent components. 5 收音机爱 好者资料库 RadioFans.CN