General-Electric-Co-850 电路原理图.pdf

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1、VOLUME R-17, MOST-OFTEN-NEEDED 1957 RADIO SERVICING INFORMATION 0UTS!M T turn oft yfbr, . LOOP USCD CNI1)QHU. ADJUST FOR MAX 1500 KC WHILE ROCK NG GANG ADJUST FOR MAX O 1620 KC GANG FULLY OPEN GENERAL Hi ELECTRIC ADJUST FOR MAX 455 KC SEE NOTE Model 850 OUTPUT 5DC5 l2Sv RECEIVERS),. _-*2* RCErvt L2

2、O,_ _! SzA fTEP-l ADJUST CIO TEP-2 ADJUST C*A STEP-3 READJUST 00 input signal to test point 1 STEP- ADJUST L3 with IOK RESISTOR ACROSS 4 REMOVE RESISTOR STEP-2 ADJUST 14 WITH IOK RESISTOR ACROSS L3 REMOVE RESISTOR (LP) INDICATES LATE PRODUCTION RECEIVERS X AIR CORE ANTENNA USED ON (LP) RECEIVERS K-I

3、OOO M-1,000.000 CAPACITORS MORE THAN l-MMF CAPACITORS LESS THAN -MF RESSTORS ARE /2 WATT DC VOLTAGES 0 IITV LINE. TO B SPECIFICATIONS INPUT: 105 120 Volts A-C or D C, 25 watts OPERATING FREQUENCIES: Tuning Range 540 to 1600 KC I F. 455 KC OUTPUT: Undistorted 8 watts, maximum 1.5 watts SPEAKER: 4 inc

4、h PM, 3.2 ohms, 400 cps. TO REPLACE A TUBE SOCKET Cut the socket free by cutting ill of the socket terminals at the chassis and unsolder the center terminal Now, heat each terminal only enough to push it jut The new socket can now be inserted i -to the holes left by the old one and soldered into pla

5、ce. TO REPLACE THE VOLUME CONTROL Remove the shaft nut, then cut the center and lower terminals. Apply only enough heat to the upper terminal to pull out the control Apply heat to the center and lower terminals so they may be pushed out. The new control may now be ins rted into place and soldered. T

6、O REMOVE CHASSIS FROM CABINET Remove cabinet back and interlock Remove the four self- tapping screws (hex h.ads), one on each corner of the chassis, and the single hex screw just below the tuning gang capacor Pull off the volume control knob. The tuning control knob is captivated to the cabinet, so

7、the chassis must be pulled out of the cabinet, at the Bame time pulling it off the tunur knob, which re mains n the cabinet. When pulling out the chassis, it is best to grasp the tuning capacitor (Cl) by the thumb and forefinger of one hand and the tuning knob by the other, hand and pull CAUTION. It

8、 is important to use extreme care while replacing parts andor soldering on this chassis. Too much heat on the chassis will cause the copper plating to become unbonded. Only apply the soldering iron long enough to melt the solder and pu out the part to be replaced NOTE* The shield can on T1 may be re

9、moved by unfastening the two spring clips and lifting the can off the transformer, thereby leaving the coils open for inspection or repair VI _ I2AU6 Tl _ RTL-184 _ RCW-3079 Cl _ RCT-097 C 3 RCN-048 L2- RLC-136 C7A.B.C RCE-216 R4, SI RRC-376 -T 2 RTOI76 -. C2 UCG 024 a. _ C6 | 1 RCN-053 C8 RCW-3186 J3ULL PLATE RCW-3036 38 收音机爱 好者资料库 RadioFans.CN