Philco-Radio-and-Television-Corp-39-80 电路原理图.pdf

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1、MANUAL OF 1939 MOST POPULAR SERVICE DIAGRAMS ANT. GND. lol comnNsw DET.-OSC. / 2ND.DET. A.VC. 1ST AUDIO T I TT, I.F.=470 KC. HtTWBS. (SJO&C.THm. PLU&S SHOWN FROW PRONE SIDE SCHEMATIC DIAGRAM MODEL 39-70 & 39*75 / 1 4 TUNIlit CMKNSER / 2ND. DEI DET.-OSC. A,VC. I.F 1ST. AUDIO OUTPUT m di/n (ajOSCTRANS

2、. LF=470 KC t p SCHEMATIC DIAGRAM MODEL 39-60 A SUPPLY B SUPPLY L5 VOLTS 90 VOLTS PLU&S SHDWW FRQA PRON& SIDE. COMPILED BY M. N. BEITMAN, SUPREME PUBLICATIONS 收音机爱 好者资料库 RadioFans.CN MANUAL OF 1939 MOST POPULAR SERVICE DIAGRAMS PROCEDURE FOR MODELS 39-70 AND 39-75 Operations in Order Signal Generato

3、r Receiver Output Connections to Receiver Dummy Antenna Note A Dial Setting Dial Setting Control Setting Adj ust Compensators 1 1A7G Grid .1 mfd. 470 K. C. 580 K. C. Vol. Max. 12A. IIB, llA 2 Ant. (White) 225 mfd. 1550 K. C. 1550 K. C. Vol. Max. 4B, 4A PROCEDURE FOR MODEL 39-80 Operations in Order S

4、ignal Generator Receiver Output Connections to Receiver Dummy Antenna Note A Dial Setting Dial Setting Control Setting Adjust Compensators . 1 1A7G Grid .1 mfd. 470 K. C. 580 K. C. Vol. Max. 13A, 12B, 12A 2 Ant. (White) 225 mfd. 1550 K. C. 1550 K. C. Vol. Max. 4B. 4A AThe “Dummy Antenna” consists of

5、 a condenser or resistor con nected in series with the signal generator output lead (high side). Use the capacity or resistance as specified in each step of the above procedure. BDIAL CALIBRATION: In order to adjust the receiver correctly, the dial must be aligned to track properly with the tuning c

6、ondenser. Model S9-70 and S9-80To adjust the dial proceed as follows: Turn the tuning condenser to maximum capacity (plates fully meshed). With the tuning condenser in this position, set the pointer horizontally across the dial. Model S9-7SWith the tuning condenser in the maximum capacity position (

7、plates fully meshed), loosen the coupling screws connecting the push-button unit to the condenser. The pointer is then set on the extreme left edge of the index line (low frequency end of the scale) with the tuning condenser fully closed. The gang is then opened until the pointer is at the right edg

8、e of the index line. The push-button shaft is then turned counter-clockwise to its “stop.” With the tuning condenser and push-button shaft in these positions tighten the coupling set screws. CThe locations of the compensators in Models 39-70, 39-75 and 39-80 are shown in Figs. (1), (2) and (3) respectively. 27)r20) (18)05)06) PAOOCftS AA A AB ARE AT TOP or TUNING CONO Pig. 3. Cempcnsater and Part Locations Hicl 39-80, Code 121 Underside ef Chassis H li SHA*- iso Q OH dPo o 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN