Extron electronic QSD 204 D manual Locating the three firmware IC chips, A-6 QSD 204 Appendix

Align Notches

Appendix, cont’d

U17

U38

U41

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	U41

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.

A-6 QSD 204 • Appendix