Installing A Firmware Upgrade - Extron electronics ISM 482 User Manual

Maintenance and Modifications, Cont'd

Installing a Firmware Upgrade

In some cases the ISM's firmware may require replacement with an updated
version. There are nine user-replaceable firmware chips (figure 7-2): U1, U2, and
U6 on the front panel circuit board and U98, U99, U100, U101, U102, and U103
on the main circuit board. The U-numbers are printed on the circuit boards.
Extron recommends that you send the unit in to Extron for service and updates.
U100
U101
Figure 7-2 — ISM firmware chip locations
• Chips U1 and U2 are replaced as a pair.
• Chip U6 is replaced alone.
• Chips U98, U99, U100, and U101 are replaced as a set.
• Chips U102 and U103 are replaced as a pair.
CAUTION
Replace firmware in the ISM as follows:
1.
2.
3.
7-4 Integration Scaling Matrix Switcher • Maintenance and Modifications
U6
U1
U2
/6 0
50
.
0 M AX
24
10 0- 1. 2A
Extron
ISM 482
Switcher
Changes to firmware must be performed by authorized service personnel
only. Some ISM firmware updates must be performed at the Extron
factory.
To prevent electric shock, always unplug the
ISM from the AC power source before opening
the enclosure.
Open the switcher. See "Opening and Closing the
Switcher" on page 7-2.
Locate the firmware chip(s) to be replaced on the
main or front panel circuit board (figure 7-2).
After you are electrically grounded, use a DIP chip
puller to grasp each IC chip and pull it out of the
socket(s).
U102
U103
8
7
R
6
R
U T S 5
IN P
R
G
4
R
G
3
R
G
B
2
R
G
B
1
R
G
V
B
H /H
R
G
B V
H /H
G
B V
H /H
G
B V
H /H
B V
H /H
8
V
B
H /H
7
V
H /H 6
H z
5
V
H /H
4
3
2
1
U98
U99
B
V
H /H
V
H /H
V
V
U102
Align notches.