Admiral-Y2023 电路原理图.pdf

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1、VOLUME R-20, MOST-OFTEN-NEEDED 1960 RADIO SERVICING INFORMATION Admiral View Showing Method of Removing Boltery Holder From Chassis Board MODEL COLOR NAME CHASSIS Y2009 Black The Comet 7V1 Y2011 Gray 7V1A Y2012 Coral Y2013 White Y2023 White The Starliner 7V1B Y2027 Beige Y2028 Green CIA (Continued o

2、n page 11) r! UJ A _ RJ| ; oiSi /T 7i *c5=pp! .4 I du. l black symbols and lines represent components and connections on opposite side. l I I_I 10 收音机爱 好者资料库 RadioFans.CN VOLUME R-20, MOST-OFTEN-NEEDED 1960 RADIO SERVICING INFORMATION Admiral Chassis 7V1, 7V1A, 7V1B, Continued from page 10 ALIGNMENT

3、 PROCEDURE a. Fresh batteries should be used. b. Set Volume control at maximum. c. Connect output meter across output trans former secondary. For best results, have speaker disconnected, use 12 ohm load. Use lowest output of signal generator that will produce adequate indication on lowest scale of o

4、utput meter. IMPORTANT: Output level should be held at 25 mw. or less. The voltage reading at the 25 mw. level is approximately 1.8 volts across the 12 ohm load. Step Connection of Signal Generator Signal Gen. Frequency Receiver Gang Setting Adjustment Description Adjustment 1 Radiated Signal. tLoop

5、 of several turns of wire, or place generator lead close to receiver for adequate signal. 455 KC Gang fully open 3rd IF 2nd IF 1st IF * and for maximum output. 2 Same as Step 1. 1620 KC Gang fully open Oscillator Trimmer 3 Repeat Step 1 several times until there is no further increase in the output.

6、 | 4 Same as Step 1. 1400 KC Tune in gen erator signal Antenna Trimmer for maximum output. NOTE: After completing “Step 4“ the tuning range should be 535 KC to 1620 KC; +5 KC. If this range cannot be obtained, continue with Steps 5, 6 and 7. 5 Same as Step 1. 535 KC Gang fully closed Oscillator Coil

7、 Core for maximum output. 6 Repeat Step 2; then repeat Steps 5 and 2 several times until oscillator covers required range. 7 Repeat Step 4. | t If signal generator does not produce sufficient output for usable reading, clip hot lead of generator to RF stator plates terminal of gang; clip ground lead

8、 to frame of gang. Adjust and for usable output only. Then return to “Step 1. * If difficulty is experienced in obtaining signal output, first rotate IF slugs out several turns, then slowly adjust slugs in until output is obtained. Caution: Rotating slugs too far inward will damage ceramic capacitor

9、 contained in IF can. Antenna trimmer should first be adjusted for maximum output with generator tuned to 1400 KC. Then try to increase output by rocking gang or generator slightly while readjusting trimmer._ 2N410 ) 2NO IF 1N295 -O I h Vc 2N406 OUTPUT 5 2N406 OUTPUT 1N295-#* 2N406 iiia v nnairn AVC

10、 7 DRIVERS! 2N406v AF AMP 2N406 -#(5* OUTPUTX (MATCHED PAIR) A Top View of Chassis Showing Transistor and Alignment Point Locations. Circuit differences of 7V1 Chassis REMOVING CHASSIS FROM CABINET To remove cabinet back, simply insert a small coin into one of the slots on the bottom edge and twist.

11、 To remove chassis from cabinet, first remove the knobs by pulling them off. Remove the back cover as instructed above. Remove the four screws at the cor ners of the etched board. Lift entire chassis (etched board with all components) out of the cabinet front. 1N295 DET. TAI41 BIAS REG. (NOTUSE IN 7V1 CHASSIS u 收音机爱 好者资料库 RadioFans.CN