RCA-Victor-Co-Inc-T55 电路原理图.pdf

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1、MANUAL OF 1939 MOST POPULAR SERVICE DIAGRAMS MODELS K-50 and T-55 Chassis Nos. RC-418A and- RC-418 RC-418 6SA7 lar PET-OSC- 6Sa7 ivf. PET.-AF-AVC S3 TONE COtiTIJOL Switch L 6 U r?rc * dotted CtRCUTS OM K So (RC4I6A) ONLY. - C 20 SfeO MMF Note.I n some sets a iiected across C5. 12 mmfd. capacitor is

2、con- -6ReM-R50TR. BROWM 30 . 60, Q _ brown- J BLACK MS 350. (,Cr Adjustments for Push-Button Tuning 1. Pull off the push-buttons and loosen the push-button rods with a small screwdriver. 2. Set the radio-phono switch to “radio position and accurately tune in the station for which the first button is

3、 to be set. 3. Press in push-button rod No. I (left) with the screw driver, as far as it will go without undue pressure, hold in, retune station with manual control if necessary for best reception, and then carefully tighten up the rod. Do not tighten more than 1/4 turn after the rod begins to grip

4、or damage to the mechanism may result. 4. Replace the push-button on its shaft. 5. Proceed in a similar manner for the remainder of the push-buttons 6. Insert the station marker tabs in the recesses above the push-buttons. CONTROL C2 1500 KC. L1.0SC. 600 KC. S3_TOMe COnTROL 5W. , K50 ONLY iTf OU1WT

5、otrmjT R4-. VOL.CONTROL si - POWER SW. ant. COJL ON RCA1&A rKSO) ONLY ?N0. DET. AF- AVC ISTI.F 2N0I.fr, TRAMS. TRAMS Connect the high side of Tune test the test-osc. to osc, to Antenna terminal 456 kc Antenna terminal 1,500 kc Ant. terminal in series with 200 mmfd. 600 kc LOOPl only, osc.N,- 7KMJ LJ

6、J A S L TERM. BOARD RC4ieA(K5O)0r1LY Turn radio to VICTROLA JACK 53 RECT RADIO - PHONO SVN/fTC H Quiet Point between 1,720-1,600 kc 1,500 kc calibration mark 600 kc calibration mark Adjust the ftrilowing for maximum peak output CIO and Cll (2nd I-F trans.) C6and C7 (Ist I-F trans.) C6 (osc.) C2 (ant.) Ll (osc.) (Rock in) 6 Repeat step 3 _ 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