Extron electronic ISM 482 manual Installing a Firmware Upgrade, ISM Firmware Chip Locations

10.Replace the top cover on the ISM.

11.Fasten the top cover with the screws that were removed in step 3 and step 4.

12.Rack mount the switcher if desired and reconnect all cables.

Installing a Firmware Upgrade

In some cases the ISM firmware may require replacement with an updated version. There are nine user-replaceable firmware chips (see figure 50): 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

U102

U103

U98

U99

U100

U101 Extron

ISM 482

Switcher

				8
				7
				R
			6	R
		INPU	TS 5
			R	G
		4
			R
				G
	3
		R
			G
	2			B
	R		G
1				B
	R
		G
			B
R				/HV
	G			H
			B	V
				H/H
	G	B
			H/HV
G	B		V
			H/H
	B	H/HV
B			8
	/HV		7
	H
	H/HV		6
H/H	V	5
	4
	3

2

1

B

H/HV

V	V
H/H
V

Figure 50. 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.

ATTENTION: 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:

CAUTION: Electric shock hazard. To prevent electric shock, always unplug the ISS from the AC power source before opening the enclosure.

1.Open the switcher (see Opening and Closing the Switcher on page 64).

2.Locate the firmware chips to be replaced on the main or front panel circuit board (see figure 50).

3.After you are electrically grounded, use a DIP chip puller to grasp each IC chip and pull it out of the sockets.

ISM 482 Integrated Scaling Matrix Switcher • Maintenance and Modifications 66