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Содержание RU-348A.B

Страница 1: ...M rSelectivity Limiter sensitivity ST I ndicator sensitivity ST Separation Electrical fidelity Superheterodyne Manual p tuning s push button system AM 53OKHz 1605KHz FM 88MHz 108MHz AM 452 5KH2 FM 10 7MHz AM Less than 22dB FM Lessthan 18dB AM Less than 24dB at S N 2OdB FM Less than l8dB at S N 30dB AM More than 60dB FM More than 35dB AM More than 4OdB FM More than 70dB FM More than 60dB FM 4O0KHz ...

Страница 2: ... AM tuner 1 1 lnstruments required AM stand rd signal generator SSG AM lF siveep generator 452 5KH2 Oscilloscope Dummy load 4Ql VTVM Dummy antenna see below F ig 1 l 921 194 P Parts bag 722 0231 OO SPECIAL NUT 1 o l Fig 1l 745 0430 Ot SPECiAL WASHER FEATURES o Use of monolithic power lC in the audio section assures highquality reproduction and high reliability o Considering variations in climatic ...

Страница 3: ...e 3 Adjust the core green of lFTl for maximum height of the waveform with good symmetry Adjust the core blue of lFT3 for maximum height of the waveform 4 Connect the vertical terminal of oscilloscope to TP3 Adiust the core black of lFT3 for good linearity and good symmetry of the s curve 2 3 Tracking adjustment 1 Turn the tuning knob fully counterclockwise lowest receiving f requency position Adju...

Страница 4: ... ll deteriorated o lFTq 5 misadjusted Dq 1520761 deteriorated o Tuner coil open etc Read iust Replace Replace Readjust Replace Replace FM section I TCr 2 3 misadjusted a Ot Sdeteriorated o lFTr 3 misadjusted o Tuner coil open etc Dz 3 deteriorated a ANT shield wire ooen or short Readjust Replace R eadj usl Replace Replace Replace o AM FM s atch taulty a ANT receptacle contact faulty Heprace Replac...

Страница 5: ... EXPLODED VIEW Main section o a 05 F f 4 d F A ae r l 1 t Q o JI N r ...

Страница 6: ...tolate RU 3484 RU 3z AB 1 21 28G8COa q l2at sr oo setprate FU 8181 1 22 311 089 00 Lower case 1 Elactrird t c krn REF NO PART NO DESCRIPTION P C S 23 285 0656 OO 295 0513 90_ Guide label 1 24 335 0580 O0 Molded part 1 25 330 5248 O0 Presseb part 26 oo9 061 7 OO Choke 27 28s 064s 00 Guide label 1 28 o1 2 3484 00 Variable resistor I 29 0o4 59 Ql Trimmer 30 342 O 1 07 OO 382 O1 06 OO Burton f U li8i ...

Страница 7: ...1 2 3394 00 Variable resistor 2 Tr 009 0617 00 Choke I Lr 0 1 0 0930 00 Coil 1 REF NO PART NO DESCRIPTION P C S Lz 010 1570 01 Coil L 010 1 180 00 Coil Lr o1 0 1 729 OO Coil L o1 0 1 730 00 Coil Lr 01 0 1 686 00 Coil tFTr oo5 0698 OO lF trans lFT2 005 0706 00 lF trans 1 IFT3 005 0684 00 I F trans 1 IFT 005 01 20 01 lF trans 1 IFT5 oo5 07 1 4 OO I F trans 1 Rrs r 1 0 3301 42 Solid resistor l w 33a ...

Страница 8: ...yester capacitor 5OVO O33rF Czt za 141 2233 13 Polyester capacitor 5OVO O22tF 2 L2 s 33 3 a 3 55 141 1033 12 Polyester capacitor 5OVO O 1rF 8 REF NO PART NO DESCRIPTION P C S Cga r 41 8233 1 5 Polyester caDactfor 5OVO Oa2rF 1 Ce zt 141 4733 13 PolVester caoacitor sOvO 0474F 2 Crs 141 51 13 1 1 Polyester capacitor sOv5 r opF 1 Caz 144 5612 10 Mica capacitor 5oV56OpF 1 C o 144 51 12 10 Mica capacito...

Страница 9: ... PRINTED WIRING BOARD ORF section D ...

Страница 10: ...OAF section m ...

Страница 11: ... PRINTED WIRING BOARD BLACK lo ___lli r rfr MS ...

Страница 12: ... CIRCUIT DIAGRAM I y e i 1 r1 q a a E 6 t _ 3 3 1 3 a 3 3 a 8tm 01 J a a4 I o g fl I T I I 8 E 0 3 ...

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