RCA-Victor-Co-Inc-RC-1023A 电路原理图.pdf

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1、J*; Sk K Mf. X_ 1 810 470K Pfaifi ; l| SU am 3.3 Mew. R-y 4 S 500 K #-8V. V0L.C0NTR-: MAX-AVC 516PATS0K- C7 -8 X .02 MF 4.7 MEG.” sz (front) n 3SYS6T/6 RECT 6 CZS C27 220 16-530 loop ant. (tem view) S2(RAR) RANGE SW. VIEWED FROM FRONT AND SHOWN IN POSITION NO-1 (MAX. COUNTER CLOCKWISE) POSITION NO.

2、1 . BROADCAST MIN. HIGHS- POSITION NO.?- BROADCAST MAA. HIGHS. POSITION NO.S - SHORTWAVC MAX- HIGHS. , ntv AA DC % WAITS I2QV. - MA. ALL VOLTAGE5 ARE MEASURED J _ WITH RESPECT TO COMMON -B. VOLTAGES SHOULD HOLD WITHIN . tO% WITH H7V. SUPPLY. H MEASURED WITH CMANALY5T OR VOLTOHMVST. | CHASSIS I INDIC

3、ATES COMMON I., GROUND X WIRING INSULATED ijTTI FR.OM CHASSIS. 357 g*T/s 35LSST ttSST fl*l 12JO I2S0.7 1*035 MF. RESISTANCE VALUES LES5 THAN ONE OHM ARE NOT SHOWN. On some models, electrolytic capacitor (C17, CIS) may be 20 Mfd./30 Mfd. The A VC bypass capacitor, (C14) may be .030 Mf. Connect high s

4、ide Steps of the test Tune test oscillator to osc. to I.F. grid 1 in series with .01 mfd. _ 455 kc 12SA7 grid 2 in series with .01 mfd. Antenna terminal on loop in series with 220 mmf. Adjust the follow- I Turn radio ing for maximum dial to peak output A Band Quiet ooint at 1600 kc end of dial C34,

5、C35 2nd I-F trans. C32, C33 1st I-F trans. 4A* Band rock gang C25 (BC trimmer) near 600 kc rcaVictor 56X11 Chassis No. RC-1023A; Mfr. No. 274 Antenna terminal on loop | in series with I 22 mmf. Rock gang near 600 kc 4C Band rock gang near 15.2 me. 15.2 me. center of M16M” C28 (Osc.) Recheck C25 C20

6、(ant.) on top of S.W. ant. coil C24 (Osc.)e Recheck C20 C 23 C 25 3.5 MC 600 KC Use minimum capacity peak, if two peaks can be obtained. Note.Oscillator tracks 455 kc above signal on both bands. )(12SG7)(l2SA7j| Alignment Procedure Teat Oscillator.For all alignment operations, keep the output as low

7、 as possible to avoid a.v.c. action. Output Meter Alignment.If this method is used, connect the meter across the voice coil, and turn the receiver volume control to maximum. Calibration Scale.The glass tuning dial may be easily removed from the cabinet and temporarily attached to the dial backing pl

8、ate for quick reference during alignment. Power Supply Polarity.For operation on d-c. the power plug must be inserted in the outlet for correct polarity. If the set does not function, reverse the plug. On a-c. reversal of the plug may reduce hum. - COMPILED BY M. N. BEITMAN, SUPREME PUBLICATIONS 收音机爱 好者资料库 RadioFans.CN