12-4.ConfirmationoftheoutputleveloftheATFsection12-4.ATFROMNUmie1)ConnectCH-1oftheoscilloscopetoTP413(PILOT)andCH-2toTP407(SWH).2)(LoadtheleveltesttapeTY-7111,thensettheunit I)SWH)LENEMERSSZ.tothePLAYmode.3)AsshowninPhoto4-3,makeanoteofthesignallevel2).UNAAFARS F-7FT-TIEBAL,PLAYvoltagesofheadsAandBattheAFTsection(130E-KFI$SkHz)ofthewaveform.“1).YOR3—SOCH-1LTP4I3(PILOT)(2. CH-2%TP40¢3).FHA-3OM,MBOAaTPB(130KWzO(ESv~vWANsEF,BayFEHTHMVCHSHEL(AE) LTHEA.i|Photo 4-3 i,12-5. Confirmation of the recording current at the ATFsection 12-5. AT F&O ssa titew1) Connect CH-1 of the oscilloscope to TP413 (PILOT) " 2 2and CH-2 to TP407 (SWH). 1). 4¥E2XR2-—7OCH-LETPALS(PILOT) IZ, CH-2=TP402) Load a blank TY-30B tape for recording and confirm : DSW KEHCHERSS. €there is an unrecorded portion on the tape before ; imaking a non-signal recording. , 2). ERM 7577+ F—-T TY-30B ERBL, HKMO3)Rewindtherecordedportion, thenconfirmthatthe 2 - 2 +66 = x -signal levels of heads A and B of the ATF section (130 BACKS CEMBLAR, MESRET 5.kHz)whentheyareplayedbackarewithin+2dB3).RIESRALESSERRL,FPELKLEKOANYofthelevelsnoteddownin12-4above. (Referto7Photo4-4.)KF,ByFENSHOATPR(130K2z)O(EBU~Kaa12-4VCH(XE)LALAO+2GB LATSHSSACESHRIS.(BHi-4BM)€Photo 4-412-6.Adjustmentoftherecordingcurrent oftheATF12-6.ATFROME:section:beadadSysSicgatces.*Ifthevalues do notfallwithinthestandardfangeevenISACRBCASIUMGIt,RFA=7OSCR éwhen procedure12-5 hasbeen performed,adjust theEEAMEE130K( Rl4-8)ERR,12-57=KEEP.recording currentcontrolVR130K(Fig.4-8)ontheRFunit,then repeatprocedure12-5untilthe valuesareasperLIBIKAZECHRORT,12-5.28E862 e2ENS ATS ARENNNOSE
