Sanyo M9994K Service Manual
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snagvgfeSethanneaPSRESokelnnieaADJUSTMENTOFAMPLIFIER SECTIONADJUSTMENTOFRECORDINGGAINADJUSTMENT OF PLAYBACK GAINPlayback test tape (1kHz, OdB) and adjust SVR701 (50KB) to equalizeoutputs at LINE OUTs for the left and right channels.Conditions:Automaticlevelcontrol(ALC)+ONPREPARATIONVolumecontrols(VOLUME)+MIN.|Allnecessaryadjustmentsshouldbemadeat asourcepowervoltageofModeselector(MODE)~STEREO:DC12V.insertblanktape,settheunitintherecordingmodeandapply1kHz—TurntheTONEcontrols(BASSandTREBLE)totheircenterpositions25dB (S5mV)signaltotheLINEINjacks.|andtheINPUTVOLUMEcontrols(leftandrightchannels)totheirConnectaVTVMtothe collectors ofQ807andQ907andadjustSVRmaximumsettings.702untilleft-andright-channeloutputsbecomeidentical.Thesettingsofothercontrolsareasfollows:Functionswitch(FUNCTION1)+TAPEInputlineswitch(FUNCTION2)>LINETapeselector(TAPE)-NORMALADJUSTMENT OF METERSConditions: Automatic level control (ALC) — ONMode selector (MODE) -~ STEREOPlayback test tape (1kHz, OdB) and turn the volume control (VOLUME)until the reading of the meter for the right channel becomes 2W (OVU).Adjust SVR703 until the meter readings for the left and right channelsbecome identical.TEST TAPEADJUSTMENT OF ALCConditions:Automaticlevelcontrol(ALC)—ONVolumecontrols(VOLUME)— MIN.Modeselector(MODE)—STEREO|Afterfinishingwith adjustingtherecordinggainasinstructedin(4above,insertblanktape,settheunitintherecordingmode,andappl)1kHz—5dB(1.7V)signaltotheLINEINjacks.ConnectaVTVMtothe collectors ofQ807and Q907.AdjustSVR70:toobtainidenticaloutputs fromtheleftandrightchannels.SVR 701¢ SVR 702© SVR 703|METER ADJADJUSTMENT OF BIASESMountblanktapeandsettheunitintherecordingmode,whileconnect-ingaVTVMtothe10-ohmterminalsofR845andR945.AdjustSVR801andSVR901untiltheVTVMstandsat3.5mV. |
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