RCA-Victor-Co-Inc-R-560-P 电路原理图.pdf

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1、MANUAL OF 1942 MOST POPULAR SERVICE DIAGRAMS TURNTABLE BPINOLC. cup roR useo NCCOIES RCA Model R-560-P PHONO RADIO V/Za y I MEU.DW MetLOw VOLUME7 PHONO-RADIO TUNING CONTROL POWERTONE CONTROL CONTROL Output Meter Alignment.Connect the meter across the voice coil, and turn the receiver volume control

2、to maximum. Test-Oscillator.Connect the low side of the test-oscillator to the receiver chassis, through a .01 mfd. capacitor, and keep the output as low as possible. Phonograph Motor Service Data: The phonograph motor is of the self starting synchronous type and operates the turntable through frict

3、ion drive between the motor drive spindle and the rubber tired idler on the rim of the turntable. The motor should be lubricated once or twice a year by placing a few drops of S. A. E. 20 (or equivalent) on the turntable spindle and saturating the oil retaining felt pads on the motor shaft with S. A

4、. E. 10 oil. CautionThe motor drive spindle and the rubber tire on the idler must be kept clean and entirely free from oil and grease at all times. Power Supply.Although this model employs an ac-dc chassis, it is not suitable for use on d.c., as this would damage the motor. Connect the high Tune Ste

5、ps side of test- test-osc. _ oscillator to to I-F grid, In 1 series with .01 mfd. - 455 kc 1st Det. grid 2 in aeries with .01 mfd. Ant. terminal 3 in series with 1,650 kc 200 mrafd. Radiated signal 1300 kc Repeat steps 3 and 4. Turn radio dial Quiet point 1,800 kc end of dial Gang at minimum Signal

6、Frequency Adjust the follow ing for max. peak _output L8 and L9 2nd I-F transformer L6 and L7 1st I-F transformer C25 (osc.) C31 (osc.) C23 (ant.) UANT. TO Of?ID OX (6,00 KO - CONV. SAIN I iOOX00- 4.5tKC.i4- 0.4.X (4S5 KC. ISOX (45SKC.) - I2SA7 1ST. DET. -OSC. MEASURED with 3 V. Fixr-D BiA?5 ? YK / O.flx *(4&S KC.)* -AOX ( 4oO/u)- 125Q7 2ND. DET., AF. A A VC. 50L6 T OUTPUT 3V. BIAS -S- for sain rr Data t i 5J 12SA7 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN