RCA-Victor-Co-Inc-U50 电路原理图.pdf

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1、r MANUAL OF 1939 MOST POPULAR SERVICE DIAGRAMS 6S/J7 I*DT -05C GKl J.F 5Q1 AFCA.VC. 1 IdOLUMC T-7 CONTirOC 1 R6 IflEG.TOTM. * - _II_ rRj4 csjT S XIIS L ?3 npo; 1 C2I .005 MTO. ISOfiOO* swr 1 4- MODEL U-50 CHASSIS No. RC-414C 1 Steps Connect the high side of test-oec. to Tune test-osc. t Turn radio d

2、ial to Adjust the fol lowing for max. peak output 1 6K7 I-F grid cap, in series with .01 mfd. 455 kc “A” Band LIO and Lll (2nd I.F. trans.) 2 Tuning condenser stator (osc.) in series with .01 mfd. 455 kc quiet point between 560-750 kc L8 and L9 (lt I.F. trans.) 3 Antenna lead 600 kc 600 kc (33) “A B

3、and L7t 4 200 mmfd. 1,500 kc 1,500 kc (162.4) “A” Band C2 (am.) C8 (oac.) 6 Repeat steps 3 and 4 | 6 Antenna lead 20 me 20 me (166.4) “C” Band C6 (osc.) C26 (ant.) 7 400 ohms 6 me 6 me (149) “B” Band C6 (oac.) * C27 (am.) 8 Antenna lead in series with 200 mmf. 1,500 kc 1.600 kc (162.4) “A Band C8 (o

4、sc.) , Alignment is the preferable method. Connections for the oscillograph are shown in the chassis drawing actions tor Output Meter Alignment.If this method is used, connect the SIInum” volume control to operations, connect the low nlow IsVossVhrmaM a/”ct?on if rnori /o-rhTtharst. rT tTeSiaTralefo

5、J ever”i?r iahbrMm How- rJk V S made with the receiver chassis removed the on thf fronrshaftorth? n * mounted pn-ST.i, 3,y, S: The%?6SLkL,lfdV position of the drum, ine itJb mark on the drum scale must be vertical anH Hirortlv under the center of the gang-condenser shaft whe the plafr are ie LcTrelt

6、ighteneHh aet-screw wS mu RANGE SWITCH C5 20MC / C8 1500KC / t-a dr dTa TONE CONTROL, C6 VOLUMECONTROL, .OMC et POWER SWITCH :_A. Hf EODET., A.v.c. Imi L11 SEC.AOX I 455KC-TRftNsJ (TooI.E J.l /7k * Use minimum capacity peak if two peaks can be obtained. T gang condenser slightly while adjusting L7.

7、Make test-oscilator connection to lug on tuning condenser stator (oscillator section) in series with .01 mfd, condenser. 455 kc above signal on all bands. 130 C27 C26 L7 6.0MC 20MC 600 KC COMPILED BY M. N. BEITMAN. SUPREME PUBLICATIONS 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN