Extron electronic ISM 482 - Manual (Page 87)

Integration Scaling Matrix Switcher • Maintenance and Modifications 7-4
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.
1
2
3
4
5
6
7
8
10 0- 240 50/60 Hz
1.2A MAX.
R
1
G
B
H/HV
R
2
G
B
H/HV
R
3
G
B
H/HV
R
INPUTS
4
G
B
H/HV
R
5
G
B
H/HV
R
6
G
B
H/HV
R
7
G
B
H/HV
R
8
G
B
H/HV
B
H/HV
V
H/HV
V
Extron
ISM 482
Switcher
U1
U2
U100
U101
U6
U102
U103
U98
U99
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 Changes to firmware must be performed by authorized service personnel
only. Some ISM firmware updates must be performed at the Extron
factory.
Replace firmware in the ISM as follows:
To prevent electric shock, always unplug the
ISM from the AC power source before opening
the enclosure.
1 . Open the switcher. See “Opening and Closing the
Switcher” on page 7-2.
2. Locate the firmware chip(s) to be replaced on the
main or front panel circuit board (figure 7-2).
3. After you are electrically grounded, use a DIP chip
puller to grasp each IC chip and pull it out of the
socket(s).
U102
Align notches.