Extron electronic DDS 402 manual U24 U60 U68U67

U24

U60

U68U67

Figure A-2 — Locating the four firmware IC chips

6. For U60 or U24, align the hooks of a PLCC IC puller tool with the slots located in opposite ends of the firmware chip.

7.Insert the hooks into the slots, and squeeze the tool gently to grasp the chip.

8.Pull the chip straight out of the socket, and set it aside.

9.For U67 and U68, align the slots of the new firmware chip with the angled corners of the socket in the same orientation as the old chip. Gently, but firmly, press the chip into place in the socket.

10. For U60 or U24, note the key (angled corner) of the new firmware IC and the dot on the underside that indicates pin 1 (figure A-3). Orient the IC to match the key and pin 1 (indicated by arrow) on the socket, and gently, but firmly, press the IC into place.

Key Pin 1 mark Pin 1 mark

Key

U60 or

U24

Socket

IC

Figure A-3 — Key and pin 1 mark

11.Replace the top cover on the DDS 402, and fasten it with the screws that were removed in step 3.

12.Rack/furniture mount the scaler, and reconnect the AC power cord.

Digital Display Scaler • Reference Information A-5