General-Electric-Co-453 电路原理图.pdf

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1、VOLUME R-16, MOST-OFTEN-NEEDED 1956 RADIO SERVICING INFORMATION GENERAL ELECTRIC ADJUST FOR MAX (5 455 KC SEE NOTE Model 895 circuit is the same as 453 with addition of clock and switch arrangement. 1500 KC WHILE ROCKING GANG i 2 2M 1-5 (33M IN SOME (|2 OR 2 7 IN RECEIVERS),. RECEIVES ) L2 _ ADJUST

2、FOR MAX 1620 KC GANG FULLY OPEN alignment note RF STEP-1 ADJUST CID STEP-2 ADJUST ClA STEP-3 READJUST CID INPUT SIGNAL TO TEST POINT c STEP-1 ADJUST L3 WITH lOK RESISTOR ACROSSL4.REMOVE RESISTOR STEP-2 ADJUST L4 WITH lOK RESISTOR ACROSS 13- REMOVE RESISTOR (LP) INDICATES LATE PRODUCTION RECEIVERS *

3、AJR CORE ANTENNA USED ON (LP) RECEIVERS TO REMOVE CHASSIS FROM CABINET Remove cabinet back and interlock. Remove the five self tapping screws (hex heads), one on each corner of the chassis, and the single hex-head screw just below th tuning gang ca pacitor. Pull off the volume control knob. The tuni

4、ng control knob is captivated to the cabinet, so the chassis must be pulled out of the cabinet, at the same time pulling it off the tuning knob which remains on the cabinet. When pulling out the chassis, first close the tuning capacitor, grasp the capacitor with the thumb and forefinger of one hand

5、and the tuning knob with the other hand and pull. CAUTION: It is important to use extreme care while replacing parts and/or soldering on this chassis, as 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

6、ll out the part to be replaced. UNLESS OTHERWISE NOTED K- 1000 M - 000.000 GAPAC TORS MORE THAN l-MME APACTORS LESS THAN l-MF RES ST ORS ARE S/2 WAT OC VO TAGES ! TV L NE. TO B- TO REPLACE A TUBE SOCKET Cut the socket free by cutting all of the socket terminals at the chassis. Now, heat each termina

7、l only enough so that the socket may be pushed out. The new socket can now be inserted into the holes left by the old one and soldered into place. 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

8、 control. Apply heat to the center and lower terminals, so they may be pushed out. The new control may now be inserted into place and soldered. NOTE: The shield can on T1 may be removed by unfastening the spring clip and lifting the can off the transformer, thereby leaving the coils open for inspect

9、ion or repair. CLAMP LI _ ANT. LOOP V3 OUTPUT 50C5 C5 - RCW-3036 C8 RCW_3186 C6 RCN-053- C2 UCG-1024 T2 OUTPUT TRANS. RTO- 176 VI OSC- CONV I2AU6 RHC-103 R4,SI VOL. CONT. -a SWITCH RRC-334 V4 RECT. 35W4 _C7 RCE-216 V2 _ DETECTOR I2AV6 ._R8 Cl _TUNING L2 _OSC. COIL RLC-136 C3 -RCN-048 Tl I-F TRANS. RT -184 C4 RCW-3079 Tub*, Trimmer and Component Locations 39 收音机爱 好者资料库 RadioFans.CN