AcousticControl-SA30-pwr-sm维修电路原理图.pdf
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1、CONTENTS30 WATT AMPLIFIER(SA-30)SERVICE MANUALELECTRICAL PARTS LISTRef. No.DescriptionMfrsPart No.Resistors(All carbon film 1/4w5%,unless noted otherwise)R388.2KohmRFB282SR394.7KohmRFB247SR401.2KohmRFB212SR4115ohmRFB110SR432.2KohmRFB222SR455.6KohmRFB256SR46820ohmRFB182SR47150ohmRFB150SR484.7KohmRFB2
2、47SR494.7KohmRFB247SR510KohmRFB310SR50100ohmRFB110SR5110ohmRFB010SR5215ohmRFB015SR53100ohmRFB110SR5710ohmRFB010SR6330ohmRFB133SR71KohmRFB210SR78270KohmRFB427SR810KohmRFB310SR8222KohmRFB322SR8512KohmRFB312SR8010KohmRFB310SR7910KohmRFB310SResistors(5W cement resistor)R340.2ohmRF5G2AResistors(1W metal
3、oxide film resistor)R8610ohmRF1010R3547ohmRF1047S P E C I F I C A T I O N S1T R O U B L E S H O O T I N GB L O C KD I A G R A MTRANSFORMERANDTRANSISTORS C H E M AT I CD I A G R A MPRINTEDCIRCUITBOARDSE X P L O D E DV I E W SELECTRICALPARTSLIST12SPEAKEROUTPUTCONNECTION233456711RadioFans.CN 收音机爱 好者资料库
4、ELECTRICAL PARTS LISTRef. No.DescriptionMfrsPart No.Resistors(All carbon film 1/4w5%,unless noted otherwise)R2947KohmRFB347SR2847KohmRFB347SR4439KohmRFB339SR2733KohmRFB333SR6427KohmRFB327SR68270KohmRFB427SR3233KohmRFB333SR5427KohmRFB327SR4222KohmRFB322SR2218KohmRFB318SR3712KohmRFB312SR3112KohmRFB312
5、SR3012KohmRFB312SR3610KohmRFB310SR1510KohmRFB310SR1110KohmRFB310SR6027KohmRFB327SR11KohmRFB210SR12330ohmRFB133SR135.6KohmRFB256SR145.6KohmRFB256SR162.2KohmRFB222SR172.2KohmRFB222SR210KohmRFB310SR20270ohmRFB127SR21680ohmRFB168SR255.6KohmRFB256SR261KohmRFB210SR3315ohmRFB015SSPECIFICATIONSPHONO-57-53-5
6、5MIC2-57-53-55MIC1-57-53-55dBsensitivityInputAUX1-22-18-20at 162222.25at 81415.06VoutputRatedat 410115055dBRatioSignal-to-noise21%distortionharmonicTotal107127117VsourcePowerREMARKLIMITNOMINALUNITITEMNOTE:Nominal specs represent the design specs, All units should be able to approximatethese some wil
7、l exceed and some may drop slightly below these specs. Limit specsrepresenttheabsoluteworstconditionthesestillmightbeconsideredacceptable;Innocaseshouldaunitfailtomeetlimitspecs.TROUBLE SHOOTINGSYMPTOMUnit does not operateOutput is too smallIneffective volume control?loose pl g for power line:replug
8、 into socket.fuse is burnt out:replace it.u?output transformer open:replace OT-30.check Q9Q14:replace the defective components.?defective driver unit:replace driver it.?output transformer open:replace OT-30.VR1. VR2. VR3 is out of oderreplace?VR1. VR2. VR3CAUSE AND REMEDYRadioFans.CN 收音机爱 好者资料库ELECT
9、RICAL PARTS LISTRef. No.DescriptionMfrsPart No.Resistors(All carbon film 1/4w5%,unless noted otherwise)R7275KohmRFB375SR8175KohmRFB375SR6110KohmRFB310SR867.5KohmRFB275SR837.5KohmRFB275SR775.6KohmRFB256SR745.6KohmRFB256SR705.6KohmRFB256SR844.7KohmRFB247SR663.9KohmRFB239SR653.9KohmRFB239SR871KohmRFB21
10、0SR5862KohmRFB362SR6282KohmRFB382SR671KohmRFB210SR76820ohmRFB182SR71820ohmRFB182SR73680ohmRFB168SR63680ohmRFB168SR93.3MohmRFB533SR33.3MohmRFB533SR5947KohmRFB347SR6982KohmRFB382SR10560KohmRFB456SR4560KohmRFB456SR23390KohmRFB439SR24330KohmRFB433SR19100KohmRFB410SR18100KohmRFB410SSPEAKER OUTPUT CONNECT
11、IONtheamplifiermagbeusedinconjunctionwithaspeakerratedat4,8,16ohmsorwith100Vconstant-voltagespeakersystems.BLOCK DIAGRAMMIC1MIC2COM4 OHM8 OHM16 OHM100V-55dB10K ohms50K ohms-55dB10K ohms50K ohmsAUX10KPHONOINPUTINPUTMASTERPOWERAMPPOWERSWITCHAC FUSEAC 117v/60Hz150Hz1KHz6KHzPRIORITYTO POWER AMPPOWER LED
12、VOL PCBPOWER PCBPU PCBTO PRE AMPOT-500?COM4?Total impedance 16?8?16?100V?COM4?Total impedance 16?8?16?100VCOM4?8?16?100V?Total impedance 4?COM4?Total impedance 8?8?16?100VRadioFans.CN 收音机爱 好者资料库TRANSFORMER AND TRANSISTOR LEAD IDENTIFICATIONTRANSISTORSTRANSFORMER (OPT-30)SCHEMATIC DIAGRAMVR1A50KVR2A5
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