INCREMENTAL SERIES HINTS and TIPS
Extracting chips from their sockets.
Take your time. The danger is that you are exerting a lot of force and suddenly ons gj_
r
end of the chip comes away bending the remaining pins drastically. For this reason it :
a good idea to lever the chip out with a screwdriver or pencil thus avoiding sudden men
Care should he takeb when levering not to damage the tracks under the socket (if the $oc
is of the open window type), it is usually possible to actually lever on the socket.
Note that
the
chip
"body
is
GTctremely
rugged
- it is the
pins which
are
fragile
and
v;hicl
will stand only so much bending back and forth*
Insertion of chips into their sockets.
This is more difficult than extraction. Again, do not hurry.
It is possible to align the pins to the socket holes (ie getting then^ straight in line
with the rigtfa distance "between the rows) by grasping the chip firmly by the ends botwe
thumb and forefinger and pressing a row of pins flat down on the table being careful to
avoid sudden slips. Once the pins are reasonably ;veil aligned the chip should be placed
in the socket (the right way round!) with the pins located in the holes in the socket
plastic (but not yet in the connectors) . It can then be jiggled into place keeping a
close eye for caught pins which are starting to bend.
Pin numbers of chips.
By convention, with the chip on the table before you standing on its pins with
the indentation at the end of the chip body away from you, the pins are numbered
starting at J at the far corner on the left, down the left side and back up the
right side to the far right hand corner. It is frequently disastrous to insert
chips the wrong way round in their socket iadd apply power.
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