Removing A Device From A Matchbook; Inserting A Pga Device In A Pga Base - Data I/O UniSite-xpi User Manual

Removing a Device
From a MatchBook
Special Note About the
Conductive Pad
Pad Care
Inserting a PGA
Device in a PGA
Base
UniSite-xpi User Manual
5. Finally, close the MatchBook and press the retaining latch forward
with your thumb until the latch snaps into place, as shown in
Figure 2-12.
To remove a device from the MatchBook, unsnap the retaining latch,
open the MatchBook, and lift out the device.
After a number of insertions you may notice an indentation in the middle
of the conductive pad. (The conductive pad is the material the MatchBook
rests on.) The indentation is normal and does not degrade the contact
resistance. Nor does it degrade the performance of the MatchBook.
The life of the pad is dependent on proper care as well as the pin count
and package type of the device being used. Not all devices have the same
tolerances, and each device type may result in different life cycles for the
pad.
If you experience an increase in device insertion errors or continuity
errors, or if you experience a sudden drop in programming yields, it may
be an indication that the pad needs to be replaced. The Base has been
designed to allow you to replace the pads quickly and easily and to
minimize downtime. Replacement pads are available from Data I/O.
Each pad should be inspected and cleaned as needed; we recommend
you do this approximately every 1000 insertions or once a month. It is
normal for the pad to show signs of discoloration as it is used.
Clean the pad by blowing air over the pad. If you use compressed air,
direct the air stream from the front or back of the Base. Make sure the
compressed air does not contain any petroleum based products as these
will cause premature deterioration of the pad material.
CAUTION: Blowing air from the side of the pad could lift the pad off the
circuit board.
To further clean the pad, apply a small amount of isopropyl alcohol on a
cotton swab and, with a rolling motion, gently wipe off the pad. Make
sure the pad is clear of any cotton filaments left over from the cleaning
process.
CAUTION: Do not use any petroleum or freon based products to clean
the pad. These substances will cause premature deterioration
of the pad material.
The PGA Base can accommodate PGA packages with up to 15 x 15 pin
arrays. Use the following procedure to insert a PGA device into the PGA
Base.
2. Setup and Installation
2-35