Extron electronics CrossPoint Plus 84 User Manual page 65

To replace the firmware, do the following:
1. Follow the appropriate instructions in "Opening the Switcher" on page B-2 to
gain access to the interior of your switcher, including the instructions for
removing the front panel.
2. Locate the RS-232/RS-422 ribbon cable that connects the front panel board to
the rear panel RS-232/422 port (figure 47). Note which receptacle on the front
panel board that the RS-232/RS-422 cable plugs into, and remove the cable
from its receptacle (see step 4 in "Swapping the serial ports").
Do not touch the components inside the switcher without being electrically
grounded. Electrostatic discharge (ESD) can damage ICs, even if you cannot
feel, see, or hear it.
3. Unplug the power cable from the front panel board.
4. Place the front panel board, button side down, on a suitable workspace.
5. Locate IC U7 (figure 47).
6. Use the PLCC IC puller to remove the existing firmware IC. Squeeze the tool
to align its hooks with the slots in opposite corners of socket
U7. Insert the hooks, squeeze gently, and pull the IC straight
out of the socket. Set the IC aside.
7.
8.
Figure 48 — Key and pin 1 mark
9. Reinstall the RS-232/RS-422 cable removed in step 2. Ensure the RS-232/
RS-422 ribbon cable is plugged back into the proper receptacle for the
communications format desired (RS-232 or RS-422).
Reinstall the switcher's front panel and cover. See "Closing the switcher" on
10.
page B-3.
If you choose to check for proper operation before putting the cover back
on, ensure that tools and hands are outside the switcher and then perform
step 11. After recognizing the new IC, the switcher should power up
normally. Unplug the AC power cord, and reinstall the switcher.
CrossPoint Plus Matrix Switchers • Reference Information
Note the key (angled corner) of the new firmware IC
and the dot on the underside that indicates pin 1
(figure 48). Orient the IC to match the key and pin 1
(indicated by arrow) on the socket, and carefully press
the IC in place.
Reinstall the power cable that was removed in step 3.
Key Pin 1 mark
Socket
Pin 1 mark
Key
IC
B-5