Fisher-PresidentV-mc-sm维修电路原理图.pdf

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All input selecior purhbullons out. and level sel adiuslmenls al minimum. Volume conlrol al minimum. Bass, freble, and channel balance confrols at mid-posilion. Loudness contour conlrol off Rumble filtei at 20 cycles. Equalizalion selector at RIAA l. Oulpul seleclor al STANDARD. Voltoge Reference Chort Scf line voltoge ot l17 volts AC,50-60 cycles. All reodings sre in DC volls wilh rerpecf to chcrsir ground. Allow l5-minule inslrumenl worm-uP bcforc loking mco luremcnlS. Resistonce Reference Chort Disconnccl the choilir AC power cord. Dischorge oll electrolytic copocilors lo cho$i: ground fhrough o IOO-ohm rerisfor. Disconnecl oll coble: lo orrociotcd equipment. Reodings ore in ohmr wilh raspecl lo chorsis ground + I i f s $ rll i I I ; tl ; c: SYMBOL TUBES TUEE SOCKET TERMINAT NUMBERS I23 456789a vl850P 12.6o90No6.3 v2r70o 1.312.6ot55 Nt56.3 v3265 r55t5525.2t2.5125o t.3t8.9 v485o P12.6090 xo 6.3 v5r70o 1.325.212.6t556.3 t5It.9 v6125o t.325.212.6265t55 155t8.9 v7300 acx 3656.3 ACox300 acxx SUPPLY CAPACITORS TERMINAL SYMEOL5 VOLTAGE CHART NOTES AC Reading in AC volti N Less than 1 volt DC, ng.tive P Less th.n I volt DC, potitivo X No cgnnction a Dual-tilamont iun 1 7 7 7 AW 1644 CH. A CH. B POWER AMPI.IFIER CONNEC REMOTE CONTROL CABLE H ERE POWER AMPLIfIER TO CHANNEL B SPEAKERS NOTE:TAPE RECORDER JAC .RADIOlAND2 AND LINE OUTPUT AND 2 ARE CONNECTED TO FIStsER COMPONENTS VA CABLES AI REAR OF UNIT t? RECORD CHANGER 7025 ECC83/12AX7 7025 ecc83/r2lx7 Ti5 ECCSI l2AI7 ECCSr 12.17 MAIN OUTPUT VOLTAGE AMP. TONE CONTROL RECORDER OUTPUTVOLTAGE AMP. TONE CONTROLMAIN OUTPUT CH. BCH. 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