Finding the service manual is a bit problematic. Had a look at the L-55A but it does not have
the bias procedure. The standard procedure is to connect the MM(read millivolts) between the
emitters of the output transistors, ie Q714emitter and Q715emitter. There may be some metal
posts in the area, maybe on the emitter resistors themselves. Need someone with first
hand experiance to chime in with the required mV
