Maintenance and Modifications, cont’d
Digital XPoint Matrix Switchers • Maintenance and Modifications
6-4
Installing a firmware update
The integrated circuit device that contains the firmware for the switcher also
contains the memory in which presets are saved. When you replace the IC,
these settings are lost. You may want to record the presets before you replace
the IC.
To replace the firmware, do the following:
1.
Follow the instructions in Opening the switcher on page 6-2 to gain access to the
interior of your switcher.
2.
Locate IC U42 (figure 6-3).
U42
Figure 6-3 — Replacing U42
3.
Use a PLCC IC puller to remove the existing firmware IC. Squeeze the tool to
align its hooks with the slots in opposite corners of socket U42. Insert the
hooks, squeeze gently, and pull the IC straight out of the socket. Set the IC
aside.
4.
Note the key (angled corner) of the new firmware IC and the dot on the
underside that indicates pin 1 (figure 6-4). Orient the IC to match the key and
pin 1 (indicated by arrow) on the socket, and carefully press the IC into place.
Key
Pin 1 Mark
Pin 1 Mark
Socket
IC
Key
Figure 6-4 — Pin 1 mark
5
.
Reinstall the switcher’s cover. See Closing the switcher on page 6-2.
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 6. After recognizing the new IC, the switcher should power up
normally. Unplug the AC power cord, and reinstall the cover.
im Vertrieb von
CAMBOARD Electronics
www.camboard.de
Tel. 07131 911201
Fax 07131 911203
