Philco-Radio-and-Television-Corp-C-580 电路原理图.pdf

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1、MANUAL OF 19SS MOST-OFTEN-NEEDED RADIO DIAGRAMS PHILCO HOME RADIO MODELS C-579, C-580, C-716, C-718 and C-720 90 V 1 2 TCI TC2 47 4 CC2 uuf T A T30uf BTuf CTZOuf 3SW4 Cl A6 J0A7 _/ H* LIMITING A A RES 680/V A 3 *( W l4 WM! C0LD 31 ALIGNMENT PROCEDURE GENERAL Allow the set and test equipment to warm

2、up for fifteen minutes before starting alignment procedure. TUNING DIAL Before proceeding with the alignment, set the tuning knob indicator so that it is in a horizontal position, just pass the 55” dial mark, when the gang is fully closed. OUTPUT INDICATOR Connect the output indicator (a 1000 ohms-p

3、er- volt, a-c voltmeter, or an oscilloscope) across the voice-coil terminals. SIGNAL GENERATOR Use an AM r-f signal generator. Connect the ground lead to B, and connect the output lead as indicated in the alignment chart. OUTPUT LEVEL Attenuate the signal-generator output throughout the alignment so

4、 as to maintain the output level below 0.4 volt. RADIO CONTROLS Set the volume control to maximum. Set the tun ing control as indicated in the alignment chart. SPECIFICATIONS CABINET _ _ _ _ Moulded plastic CIRCUIT - - _ - . Three tube autodyne (plus rectifier) FREQUENCY RANGE . _ . . 540 KC to 1620

5、 KC AUDIO OUTPUT _ - .1 Watt OPERATING VOLTAGEModels C-579 & C-580 105 to 120v., ac or dc Models C-716 & C-718 105 to 120v., ac POWER CONSUMPTION _ _- . 30 Watts AERIAL - _ _ _ Self Contained Magnacore INTERMEDIATE FREQUENCY 455KC PHILCO TUBES 12AU6 Converter-oscillator, 12AV6 detector 1st audio, 50

6、C5 output and 35W4 rectifier ALIGNMENT CHART SIGNAL GENERATOR Connection to Radio Connect signal gener 455 KC ator through a .1 ml, condenser to antenna section of tuning gang. MOUNTEO ON SPEAKER 33W 50C3 I2AU6 I2AW6 A A A A o ww v CLOCK CIRCUIT AS USEO IN MODELS C-716 , C-716 ft C-T2Q W v /S4 X# 12

7、AVej NOTE: In Clock Models, the switch on VRl is removed and a wire is added between wiring panel and clock. MODEL C-580 Use radiating loop Same as Step 2 Special Instructions Adjust for maximum Tuning gang TC2 output in order given, fully opened I-F sec. TCI I-F pri. Adjust for maximum Gang VCP-2 output. fully opened osc. trim. Adjust for maximum I 1400 KC output VCP-1 ant. trim. Repeat Steps 2 and 3 until no further improvement is obtained. 66 收音机爱 好者资料库 RadioFans.CN