Extron Electronics QSD 204_204D User Guide - Manual (Page 46)

Appendix, cont’d
QSD 204 • Appendix A-6
Locating the three firmware IC chips
5. After you are electrically grounded, the U17 or U38 IC
chip may be removed by grasping it firmly with your
fingers and pulling it out, then continuing to step 8.
Removal of the U41 IC chip requires a PLCC IC puller
tool. To remove the U41 chip, align the hooks of a
PLCC IC puller tool with the slots located in opposite
ends of the U41 firmware chip.
6. Insert the hooks into the slots, and squeeze the tool
gently to grasp the chip.
7. Pull the chip straight out of the socket, and set it aside.
8. Align the slots of the new
firmware chip with the
angled corners of the socket
in the same orientation as
the old chip.
9. Gently, but firmly, press the
chip into place in the socket.
10. Replace the top cover on the QSD 204 decoder, and fasten it with the screws
that were removed in step 3.
11. Rack/furniture mount the decoder, and reconnect the AC power cord.
U41
Align Notches
U41
U17
U38