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A-5DVS 204 • Appendix
Firmware Upgrade Installation
In some cases, the DVS 204’s firmware may require replacement with an updated
version. There are three user-replaceable firmware chips: U41 — the main
microcontroller, U38, and U17. The numbers are printed on the circuit board. We
recommend that you send the unit to Extron for service and updates.
Changes to firmware must be performed by authorized service personnel
only. Some DVS 204 firmware updates must be performed at the
Extron factory.
Follow these steps to replace firmware in the scaler.
1. Disconnect the AC or 12 VDC power cord from the DVS 204 to remove
power from the unit.
To prevent electric shock or damage, always unplug the DVS 204 scaler
from the AC or DC power source before opening the enclosure.
2. Remove the scaler from the rack or furniture.
3. Remove the cover of the scaler (the top half of the enclosure) by removing
the screws, then lifting the cover straight up.
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Lift Cover
Straight Up.
Remove (4)
Screws from
Top.
Do not touch any switches or other electronic components inside the
scaler. Doing so could damage the scaler. Electrostatic discharge (ESD)
can damage IC chips even though you cannot feel it. You must be
electrically grounded before proceeding with firmware replacement. A
grounding wrist strap is recommended.
4. Locate the firmware chip(s) to be replaced on the circuit board, as shown in
the following illustration.