Albrecht_AE80H_Service_Manual维修手册含电器原理图

RECEPTION CHECKPOWER ONDoes the display workIs the voltage regulatoproperty?(IC7)OK?Is the IC204 clockoscillation waveform oreset OK?Does SQ function andscan when SQ is on?Is the voltage detector(1C202OK7Does key-entry workIs IC204 OK?porperly?Is IC3 and/or assoclatedcircuits OK?Does theunit produce noise whenthe volume control is tumnedIs the mute circuit (IC5)ls the IF amp or noiseclockwise?(SQ isOK?amp circuit (IC3)OK?turned counter-clockwise.)Is the audio amp (ICB)ls IC204 OK?OK?Is thereception OK when correctIs the DC-DC converterfrequencies are0C2)0K?entered?ls the keyboard and/orIs the voltage regulatorassoclated circuits OK(IC7)OK?Does memory functionIs the backup capacitorwork properly?(C211)and/or associatedcircuits OK?Is IC204 reset properiyIs the band selector (Q22Q23)0K7Is the voltage detectorENDcircuit(IC202OK？Is the PLL circuit (IC1,Q19,and Q20)OK?Is the memory powersupply circuit(IC203)OK?is the VCO circuit(Q,Q7.Q9,Q10,Q15,Q16 andQ17)0K?