Extron electronic ISM 482 Maintenance and Modifications, Cont’d, Installing a Firmware Upgrade

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.

U6

U1

U2

U100

U101 Extron

ISM 482

Switcher

U102

U103

U98

U99

B 8

H/HV

			7
			R
	6		H/HV	V
			R
INPUTS	5	R	V
			G
4	R
			G
3
R		G

	2				B
	R		G
1					B
	R
		G
				B
R	G				H/HV
			B
					H/HV
	G	B
				H/HV
G	B
			H/HV
	B	H/HV
				8
B	H/HV
			7
	H/HV		6
		5
H/HV

4

3

2

1

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	U102
	socket(s).

Align notches.

7-4 Integration Scaling Matrix Switcher • Maintenance and Modifications