RCA-Victor-Co-Inc-RC-1046B 电路原理图.pdf

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1、Test Oscillator.Connect high side of test oscillator as shown in chart. Connect low side through a .01 mf capacitor to common “B,” Keep the output signal as low as possible to avoid AVC action. Output Meter.Connect leads between speaker voice coil dnd chassis. Turn volume control to maximum clockwis

2、e, tone control to maximum highs (clockwise). Dial Pointer Adjustment.Rotate tuning condenser fully counterclockwise (plates closed). Adjust indicator pointer to from left hand edge of dial back plate. MANUAL OF 1948 MOST-OFTEN-NEEDED RADIO DIAGRAMS rcaVictor 66X11, 66X12, 66X13 Chassis No. RC-1046A

3、, RC-1046, RC-1046B 66X14, 66X15 RC-1046B Critical Lead Dress 1. Dress output plate bypass capacitor (C-ll .02 mf) against chassis. 2. Dress 35L6GT plate lead (red) against chassis and away from volume control, leads and terminals. 3. Dress audio coupling capacitor (C-7 .02 mf) away from 35L6GT heat

4、er leads. 4. Dress tone control lead against front apron. 5. Dress 2nd i-f yellow and brown -leads away from output plate bypass capacitor (C-ll, .02 mf.) and away from all heater leads. 6. Dress lead to speaker voice coil away from tuning shaft “C washer. 7. Dress tone control capacitor (C-10, .002

5、 mf.) away from oscillator coil. 8. Dress all uninsulated leads away from each other and away from chassis to prevent short circuits. 9. Dress blue and green leads of both i-f transformers back in shields leaving exposed lengths as short as posable. Steps Connect the high side of test-oscillator to

6、Tune test-osc. to Turn radio dial to Adjust tire following for max. peak output 1 Stator of C-12 in series with .01 mfd. 455 kc Quiet-point 1,600 kc end of dial Sec. and pri. 2nd I-F trans. 2 Sec. and pri. 1st I-F trans. 3 Ant lead in series with 200 mmfd. l,00kc 1,600 kc C14 (osc.)* 4 M00 kc 1,300 kc C13 ant. 5 600 kc 600 kc L4 (osc.) Rock in 6 Repeat steps 3, 4 and 5. Left hand osc. trimmer should be pre-set approx. % turn from tight. j_i_i_r 4SSNC 12SK7 4SSKC f 12S071 iZJSGll (35ZSGT 1 W KJ vjJ OIF TRANS 1ST IE TRANS. I M WfefQ . B /A*oonc 11 收音机爱 好者资料库 RadioFans.CN