RCA-Victor-Co-Inc-4-X-641 电路原理图.pdf

《RCA-Victor-Co-Inc-4-X-641 电路原理图.pdf》由会员分享，可在线阅读，更多相关《RCA-Victor-Co-Inc-4-X-641 电路原理图.pdf（1页珍藏版）》请在收音机爱好者资料库上搜索。

1、MANUAL OF I9S4 MOST-OFTEN-NEEDED RADIO DIAGRAMS rca Victor AC-DC Radio Receiver Model 4-X-641 Chassis No. RC-1140 ALIGNMENT PROCEDURE Output Motor Alignment.Ii this method is used, connect the meter across the voice coil and turn the receiver volume control to maximum. Test Oscillator.Connect low si

2、de oi test oscillator to common wiring in series with a .1 mi. capacitor. If the test oscillator is a. c. operated it may be necessary to use an isolation transformer for the receiver during alignment and the low side of the test oscillator connected directly to com mon wiring at the electrolytic ca

3、pacitor. Keep the oscillator output low to prevent a-v-c action. Step Connect high side of sig. gen. to Sig. gen. output Turn radio dial to Adjust for. peak output 1 Pfn No. 7 of 12BE6 (V2 conv.) 455 kc Quiet point near 600 kc Top and bottom cores of T3 and T4 2 1620 kc Gang open *C1-B Osc. 3 1400 k

4、c 1400 kc signal Cl-A R.F. Cl-C Ant. * External Antenna terminal Shunt Cl-A with 22,000 ohm resistor 600 kc 600 kc T2 Osc. (Rock gang) 5 Remove 22,000 ohm resistor from Cl-A 600 kc 600 kc T1 R.F. 6 Repeat steps i , 4 and 5 Dial Indicator and Drive Mechanism LOOP ANTENNA / Tube aud Trimmer Locations

5、Power Output Undistorted .0.8 watt Maximum .1.2 watts Tuning Drive Ratio .10 to 1 (5 turns of knob) ALL RESISTANCE VALUES ARE IN OHMS VOLTAGES MEASURED TO COMMON WIRING WITH VOLTOMYST, SHOULO HOLD WITHIN *20% WITH RATED POWER SUPPLY. T -a-o- SI (ON VOL. CONT.) 4 ISV A.C-OC. _ POWER SUPPLY ALL CAPACITANCE VALUES LESS THAN 1.0 ARE IN MF. ANO ASOVE 1.0 ARE IN MMF. EXCEPT THOSE INOICATEO. 收音机爱 好者资料库 RadioFans.CN