Sounds like you have a shorted coil or diode. Physically check all coils do they all look Ok? Disconnect A3 J1 and then put the fuse in, does it blow? If not then most likley culprit is the out hole kicker coil. If it does still blow then this coil is Ok and its one of the other playfield coils.
Sound advice.
Just check that the playfield fuse is correctly rated - I think it should be 1 Amp SloBlo
