McIntosh-MC225-pwr-sm 维修电路原理图.pdf

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1、MAINTENANCEMANUALMC225STEREOPOWER AMPLIFIER(Serial Nos. 100C1 & above)RadioFans.CN 收音机爱 好者资料库RadioFans.CN 收音机爱 好者资料库Table 1. MC225 VOLTAGE AND RESISTANCE CHART(Schematic No. SC126-167A)Tube12AX7(VI)12AU7(V2 or V3)12BH7(V4 or V5)7591(V6, V7, V8, or V9)Pin No.12345678912345678912345678912345678DC Volt

2、s11501FILFIL11501FIL295115121FILFIL295100121FIL2852539FILFIL2852539FILFIL3903900.8-21FIL390Resistance inOhms, Unit Off180K1M3.3K00180K1M3.3K027K*180K18K0030K*2.4M18K022K*220K4.7K0022K*220K4.7K0062*130*40180K0130*This Resistance measured to positive side of B+ rectifier SR2. Warning:Discharge filter

3、condensers before making measurements.A high resistance VTVM is used for all measurements, voltages and resis-tances are to ground except as noted.Special components used in the MC225 are listed below.These components are designed and built specifically forthe MC225. They may be purchased directly f

4、rom CustomerService, Mclntosh Laboratory Inc. When you order parts besure to give the SCHEMATIC NO. and DESCRIPTION fromTable 2 below, and serial and model number for your am-plifier.Table 2. MC225 SPECIAL COMPONENTS(Schematic No. SC126-167A)LABORATORY INC.2 CHAMBERS STREET, BINGHAMTON, N. Y.Made in

5、 U.S.A.Phone-Area Code 607 723-54912M-AA126-170COMPONENT NO.C29A, B, CL5R45SR1, SR2SR3TlT2T3DESCRIPTIONFilter Capacitor, 80-35/15 MF 500/450 VChoke, FilterThermistorSilicon Rectifier, 500PIV, 500 MASelenium Rectifier, 400 PIV, 75 MAOutput Transformer, Type M-220AOutput Transformer, Type M-220BPower Transformer, Type M-221