General-Electric-Co-RP1120A 电路原理图.pdf

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1、VOLUME R-19, MOST-OFTEN-NEEDED 1959 RADIO SERVICING INFORMATION GENERAL ELECTRIC COMPANY Models RP1120A, RP1120B TO REPLACE TUBES 1. Open cabinet lid. 2. Remove screws holding vent panel board and inter lock. 3. Remove vent panel board (interlock is automatical ly disconnected.) TO REMOVE AMPLIFIER

2、CHASSIS 1. Follow steps 1 through 3 as above. 2. Remove loudness and tone knobs. 3 Loosen screws on interlock bracket; slide inter lock out of mounting slot. (Mark location of bracket on cabinet before removing so that bracket can be keyed to correct location when replacing.) 4. Remove the three hex

3、head nuts from screws on cabinet brace above speakers and the three hex- head nuts from screws on cabinet brace under speakers. 5. Lift out grille (with all electronic components) and place down in front of cabinet carefully. 6. Unscrew two clamps holding wires from chassis to changer. 7. Remove amp

4、lifier chassis by unscrewing the three screws holding chassis to grille. Before replacing knobs, turn control shafts fully counterclockwise; press on knobs with the knob indicator dot to the left of center at the bottom. NOTE AFTER RCP.ACINO A speaker or Output TRANSFORMER The SPEAKER PHASIM MUST BE

5、 CHECKED FOR CORRECT WIAIN0 AS FOLLOWS APPLY A I I/I VOLT BATTERY ACROSS SPEAKER TERMINALS, BATTERY - TO BOTTOM SPEAKER TER MINAL AND BATTERY B* TO TOP SPEAKER TERMINAL BOTh SPEAKER CONES MUST MOVE OUT WHEN VOLTA BE IS APPLICO ca 9000 these components are IN RC NETWORK CHANGER FRAME UNLESS OTHERW 3E

6、 OENOTED CAPACITORS MORE THAN I MMF CAPACITORS LESS THAN I - MF RESISTORS K 1.000 A* . i 000 OOO OC VOLTAGES AT IITV LINE T W/20 000 _fLtVOLT METER Model AS2 stereo matching unit uses a very similar circuit. TO MOTOR TO SW. a MOTOR TO CHANGER CAP-RES. NETWORI TO CARTRIDGE COMPONENT LOCATIONS - BOTTOM VIEW 56 收音机爱 好者资料库 RadioFans.CN