Philco-Radio-and-Television-Corp-39-31 电路原理图.pdf

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1、MANUAL OF 1939 MOST POPULAR SERVICE DIAGRAMS lO t I c n O a rr O c c SEJ S3 ift C I V) O a o -P fO 3 ca c? I ro v o 3 fO CU I O M fO a lO -H o o o * o t-S CD o o o C* O l CD T-l Jl c U o a o 4* 3 “ B-S C 3 3 5 O t T3 1 C c c I 3 ji * ? 5 o o - 2i o c + O) r3 fl f- 2 I g-5 W Dl t CD 00 is p *g -3 3 -

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7、CE DIAGRAMS Trbddi, 39-30,31 atui 39-35, Coda-UI l lO 5 VOLTAOCS MEASUnCD FOM JOCMT CA L Vy 2 CONTACTS TO CHASSIS rifPE OF CIRCUIT: Mcdels 39-30 and 39-35 code i3i are similar with the exception of the type of Caoinets, Speakers and power Transformers. These differences are shown on the Re placement

8、 Parts list and circuit diagram. Models 39-31XF and 39-31XK are Identical to Model 39-35, imV Code 121 with the exception of cabinets. | The Model 39-35, code 121 specifications, diagram ai,1 replacement parts listed below and on the following pages apply to Models 39-3lXr and XK. A.C. operated; sup

9、erheterodyne circuit with two tuning ranges, covering standard broadcast (540 K.C. to 1720 K.C.) and short-wave (4.9M.C. to le.O M.C.) frequencies; Automatic Volume Control; and pentode output. 1ST AU0-75 I 9L2 / 2N0 0|T AVC uy POWER SUPPLY: Voltage, 115 volts. Frequency, 50-60 cycles. Power consump

10、tion 45 watts. INTERMEDIATE FREQUENCY: 470 K.C. TUNING RANGES: 540 K.C. to 1720 K.C.; 4.9 M.C. to 18.0 M.C. Alignment of Compensators EQUIPMENT REQUIRED; (1) Signal Generator: phllco Model 077 Signal Gnerator which has a fundamental frequency range from 115 to 36,000 K.C. Is the correct instrument f

11、or this purpose. (2) output meter, Phllco Model 027 Circuit Tester, incorporates a sensitive output meter and la recom mended, (3) Phllco Fiber Handle screw Driver, part No. ,27-7059, and Fiber Wrench, part No, 3164. OUTPUT METER: TWO indicating devices for aligning of the re ceiver can be used; eit

12、her an audio output meter or a vacuum tube voltmeter. The method of connecting the audio output meter Is given in the next paragraph. The procedure for connecting the vacuum tube volt meter asanailgnlng indicator will be found on page 4.where greater accuracy of the various tuned circuits Is desired

13、, the vacuum tube voltmeter Is recommended as an aligning device. The phllco 027 Output Meter is connected to the plate and cathode terminals of the type 41 tube. After connecting the output Meter, adjust compensators in the order as given below. Signal Generator Operations Output Connections DUBy A

14、ntenna Dial Dial To Receiver (Noteg) .setting sotting SASG Grid .1 mt. 470 K.C. S80 K.C. Ant . Te r . 100 AAf. 18.0 M.C. 18.0 M.C Ant. Ter . 100 AAf. 1500 K.C. 1550 K.C Ant . Te r . 100 Awf. 580 K.C. 580 K.C Ant . Te r . 100 1660 K.C. 1660 K.C Receiver Control sottlngi Vol. conL, Max . Vol. c ont. M

15、AX . Vol. cent. Max . Vol. cent. Nfax ._ Vol. c ont . Max . Ad 1 ua t Cojjanajtora (soA) (laB) (18A) (4B) (B) (4A) (BA) (B) A-The DUAAy Antenna cons Ists of a condenser c on- _ nected In series with the signal ge nera t or ou t pu t lead c o r r e c 11 y t he d la 1 pointer wus t be aligned to (high

16、 side). Use the capacity as specified In each properly with the tuning condenser. To adjust step of the above procedure. proceed as follows: with the tuning con- B-DIAL CALIBRATIoa: In order to adjust the re- le f rindVx”n ne aT t he 1 f Pooler on the extrewe leit index line at the low frequency end of the scale 9 COMPILED BY M. N. BEITMAN. SUPREME PUBLICATIONS 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN