Datecodes on TTL likely 1997 , much more likely
86, 12, 17 on this inspection ink stamp roundel so 86 is not 1986.
Amazing they could keep using on one ch as long as they did, only stopped
when an intermittant squeel got too frequent. pcb crack half the height of
the mixer board. Edge reinforced , other end drill hole crack limited now
and major traces drilled/bridged with metal , so can safely handle to deal
with all the other traces. I knew the amp had been dropped from the rear
panel bent by the tr inertia. So stove in from the front as well.