Yaesu FT-901DM Maintenance Service Manual page 67

SERVICING
Sometimes, after the design and drafting of a board
are completed, a board is produced with an error
in it. Though non-technical managers sometimes
suffer a stroke at hearing of this situation, it is not
unheard of in engineering circles. Thus, should you
encounter etch cuts and jumpers on a board, be
assured that the modifications were made in the
interest of securing optimum performance. Unless
you consider your expertise to be superior to that
of the design enginner, please leave these mods
in place.
However, in service work the occasion does arise
when a trace must be cut. Proceed as follows.
Base Material
Circuit Traces on PCBA
If you have previously lifted a trace, make an etch
cut on each side of the lifted trace, and install a
wire bridge as shown in the drawing.
Square Cu Yh
Coat Cut Area With Eastman 910
-060
3-12
oe
-020
"Etch cut"
"Wire bridge"
Trace