RCA-Victor-Co-Inc-X552 电路原理图.pdf

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1、MANUAL OF I9SI MOST-OFTEN-NEEDED RADIO DIAGRAMS _ H L, 600 KC LOPANT ANT. f| = LOOP ANT L 2 600 KC ANT OSC V /I40OKC A / rcaVictor AC-DC Radio Receiver Models X551, X552 Chassis No. RC-1089B RC-1089C SPEAKER 455 KC. TOP 8. BOTTOM L X551 Maroon Change in Schematic Diagram: Resistor R4 (3.3 meg. a.v.c

2、. filter), previously connected to the junction of R12 (47K) and the phono jack (II), is now con nected to the junction of R12 and terminal #2 of the 2nd I-F transformer. The revised connection is illustrated below. - /OSC OUTPUT L /I620KC rswi /vT i=l ilaxvs), 7 IF DET AVC AF AMP TUNING 4-55 KC CON

3、TROL TOP S SOT TOM VOL CONT. it PWR. SW. Tube and Trimmer Locations Alignment Procedure Test-OscillatorFor all alignment operations, connect the low side of the test oscillator to the receiver chassis, and keep the oscillator output as low as possible to avoid a-v-c action. On a.c. operation an isol

4、ation transformer (115 v./llS v.) may be necessary for the receiver if the test oscillator is also a.c. operated. Connect the high side of Steps test-oscillator to 12BA6 I-F grid 1 through .01 mfd. capacitor Stator of 2 Cl-2 through .01 mfd. Short wire placed near loop to radiate signal Tune test-os

5、c. to Turn radio dial to Adjust the following for max. output 455 he Quiet-point 1600 kc T2 (top and bottom) 2nd 1-F trans. end of dial Tl (top and bottom) 1st I-F trans. 1620 kc Min. cap. osc. trimmer 1400 kc 1400 kc signal ant. trimmer 600 kc 600 kc signal L2 (osc.) Rock gang Repeat steps 3, 4 and

6、 5. VI I2BEG CONVERTER V-2 leBAe i r v- 5 I2AV6 DET-A F AV C V4 50LGGT OUT PUT VOLTAGES MEASURED TO COMMON W RING WITH VOLTOHMYST AND SHOULD HOLD WITHIN 20*. K- IOOO ALL CAPACITOR VALUE5 LESS THAN OARE IN MF ABOVE I O ARE IN MMF EXCEPT AS INDICATED. OSC COIL TERM VIEW 12 BEG 12 SAG I2AVG SOLGGT 35W4 9 4 M A 7 4MA 0 I6MA 42 5 MA 60 O M A 110 INDICATES COMMON WRING INSULATED _ FROM CHASSIS INDICATES CHASSIS GROUND PM SPEAKER DIAL LAMP (TYPE 47; ON VOLUME CONTROL 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