RCA-Victor-Co-Inc-RFG25B 电路原理图.pdf

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1、VOLUME R-25, MOST-OFTEN-NEEDED 1965 RADIO SERVICING INFORMATION DOA /|OTOP Models RFG 20A, H, V, use Chassis RC-1219A.B V*vlvl Models RFG 25B, E, use Chassis RC-1219B 35169 itT iw um. 35170 2ND I f ANPL 35454 I 35454 2 Af AU”. AUCMO PMVCfl ALIGNMENT PROCEDURE Connect High Side of Signal Generator to

2、 Loop or piece of short wire placed near antenna for radioled signal Signal Gen. Output Dial Pointer Setting Adjust for Max Output 455 kc Gang fully open T4 (3rd l-F) T3 (2nd l-F) T2 (1st l-F) Repeal Stpi 1, 2, and 3 1620 kc Gang fully open Oscillator trimmer OB-T 1400 kc 1400 kc (rack gang if neces

3、sary) Anlenna Irimmer CIA-T 600 kc 600 kc (rock gang) Osc. cail Tl Repeal Steps 5, 6, and 7 USE PROPER ALIGNMENT TOOL FOR MAKING ADJUSTMENTS. CORES ARE EASILY BROKEN BY IMPROPER HANDLING, MAKING NECESSARY RE PLACEMENT OF ENTIRE COIL. .- 1 Rf 1 VOLTACCS MEASURED WITH 0LT0HMVST* mow mmin mould mold wi

4、thin lo% WITH MCW BATTIRV VOLUME CONTROL AT MM MUM N0 3HMAL IOOO ALL NTS STANCE VALUES Ht OHMS ALL CAPAOTAHCf VALUES LESS THAN 0.0 ARE m 1* THOSE ABOVE I 0 ARE IN /* EXCEPT AS NOTED CHASSIS REMOVAL 1 Remove tuning and volume knobs 2 Open case as explained under Battery Replacement 3 Remove three scr

5、ews securing chassis (Two at battery end of board and one at speaker end ) 4. Remove nut holding earphone jack (RC 1219B) or slide ear phone jack out of slot (RC 1219A). 5. Unsolder speaker wires if necessary (or remove clips holding speaker to case). 6 Unsolder battery wires if necessary 7 Lift board out of case. T0 SPEAKER WTERM-BD. YEL TO Jl EARPHDNE JACK 131 收音机爱 好者资料库 RadioFans.CN