Fisher-125A-pwr-维修说明书手册含电器原理图

酸FISHER MODELSPHOTOFACT*FolderEIA125-A,125-AXMODEL 125-AXTRADE NAMEFisher Models 125-A,125-AX125AMANUFACTURERFisher Radio Corp.,21-21 44 th Drive,Long Island City 1,N.Y.TYPE SETAC Operated Audio AmplifierTUBES (Ten)opeeaUA Amp.-Phase inv river (ELsCT Output,6At66Y6GT Volt.Regulator,(2)5R4GY Rectifier125-AXFISHER MODELSPOWER SUPPLY105-125 Volts AC-50/60 CyclesRATING1.92 Amp.117 Volts (200 Watts)ADJUSTMENTSPERFORMANCE MONITOR ADJUSTMENTS (R2,R3,R4)2Connect a 162 load to the output terminals.Plate Current (R3)until pointer colncides with plateShort the input jack.markon meterTurn Level Adjust(R5)fully counterclockwise.8.Hold Monitor Switch in"Output Balance"position.RotateRemove the 3 caps covering these adjustments.TurnBalance(R4)until pointer coincides with balance mark oneach control to its mechanlcal center of rotation.meter,or is within 1/8 inch.9.Check all three adjustments and repeat if necessary.tionRotateRecheck after 30 minutes.Screens (R2)until meter pointer coincides with screen10.indications are not obtained,check output tubesmark on meter.7.With Monitor Switch in "Plate Current"position,rotateDRIVER BALANCE ADJUSTMENT (R6)This adjustment is not necessary unless the associated circuit has been tampered with or repaired,and then only if theproper equipment is available.Connect an accurately callbrated,low distortion audio5.Turn 2-Matic Control (Rl)fully counterclockwise.6.Set the generator to 1000v with an output slightly belowthethe clpping point of the amplifier output.Keep generatortantanalyzer across the resistor.T.Adjust Driver Balance (R6)for minimum distortion on4Set Impedance Matching Switch (MT)to 160 position.the analyzer.忘HOWARD W.SAMS CO.,INC..Indianapolis 5,IndianaThe listing of any available replacement part herein doesthe particular type of replacement bartRepro-not constitute in any case a recommendation,warranty oror usewithout express permission,of editorial orFOLDERguaranty by Howard W.Sams Co.,Inc.,as to the qualitypictorial content,in any manner,is prohibited.No patentand suitability of such replacement part.The numbers ofliability is assumed witthese parts have been compiled from Information furnishedaeerein (C 1958 Howard w samsrd W.Sams Co.Ine.oward.am.ine..by the manufacturers ofIndianapolis 5,Indiana.Printed in U.S.of AmericaDATE 11-58SET 422FOLDER 9