Need replacement of SMD transistor in METEX M-4660M

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metex m-4660m shematic

I have these bad SMD transistor in METEX M-4660M Q9,Q10 &Q11 and it's number is KY& AAX can any one tell me the replecment of these transistor or have the wiring diagram ?
 

metex m-4660m schematic

KY could be this N channel FET: 2SK211-Y in an SOT23 package or 2SK811-Y in SOT323 package. KY can also be a supressor diode SMBJ11 in SMB package
AAX could be a Maxim MAX810S in SC70 package

But you'd better try to find a schematic....
 

METEX M-4660M

thank you , KY = 2sk 211
AAX= MMBTA42

But I dont find them can I replace the 2sk 211 with 2n7002

any one have the schematic
 

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