JBL 6290 - Page 27

INTRODUCTION
In the
unlikely
event
that your JBL 6290
amplifier needs
to be serviced, the
following
disassembly
procedure
Is
recommended
whenever the
serviceman wants
access to
the
transistors
mounted on the inside of
each circuit board.
This amplifier
was designed
so that all
of the
circuitry Is accessible
for
probing
(with power
on If you wish)
upon
removal of only
the
top and
bottom
covers.
If
a
problem
Is Isolated to
an
electrical
component, most can be
removed from the
circuit board
by unsoldering the
exposed lead while
gently
tugging
on the
part. Parts mounted
below the board
require module
removal as
detailed
below.