Noblitt-Sparks-Industries-Inc-92P48 电路原理图.pdf

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1、VOLUME R-23, MOST-OFTEN-NEEDED 1963 RADIO SERVICING INFORMATION A MODEL 92P48 CODE 1. 70601 VIA 14I2AX7 C2 -o.ev 22$* “too 220K 4700 VIB I90V V Mn LHSIS ; -0*EXTERNAL CONNECTIONS TO PRINTED BOARD. 2 VOLTAGES MEASURED WITH VACUUM TUBE VOLT METER. 3 RESISTANCE MEASUREO IN OHMS: K-1000 , MEG * 1,000,00

2、0. 5 CAMCITANCE VALUES LESS THAN ONE ( I) ARE IN MlCROFARAOS (*) ANO VALUES OF ONE (I) OR GREATER ARE IN MICROMICROFARADS UNLESS OTHERWISE INDICATED. 6 COMPONENTS IN THIS AMPLIFIER ARE INTERCONNECTED TO RESULT IN A CONSISTANT PHASE RELATION BETWEEN CHANNELS DO NOT OISTURB THIS RELATIONSHIP OURING SE

3、RVICING. 7 PHASING OOT Tl , T2 , T3 ( IN PHASE TERMINALS). RED DOT OR WIRE IS PRIMARY. GREEN OOT IS SECONDARY, YELLOW WIRE IS TERTIARY. SPEAKER ( POSITIVE VOLTAGE MOVES VOICE COIL OUTWARO). 8 RESISTORS WITH THC SAME R* NUMBER ANO LETTERS FOLLOWING ARE GANGED TOGETHER 2 S SsS 8 . o tt eoe o: o “CARTR

4、IDGE HOLOER NEEDLE GUARD NEEDLE SET DOWN Make needle set down adjustment only when necessary. To obtain the correct needle set down point, a screwdrive slot screw indicated by A (see illustration) is located at base of the tone arm. Turning screw clockwise moves the needle toward the outer edge of t

5、he record; counter-clockwise rotation moves the needle toward the center of the record. m b f! m U m io N NO O C C E E SCHEMATIC LOCATION LOCATION OF PARTS DESCRIPTION SCHEMATIC LOCATION DESCRIPTION 43687-473 47100-9 224 470 ohm, 1/2W., 20%_ Control, Stereo, Dual 3 meg ohm 220K ohm, I/2W., 20% I00K ohm, 1/2W. ,20% Control, Balance, 2 meg ohm 21 收音机爱 好者资料库 RadioFans.CN