Tuesday, February 17, 2009

SpeedStream 4200 Cooling MOD

After having the SpeedStream4200 around for about 2 weeks I decided that the tiny diminutive DSL modem has serious cooling issues. Under normal conditions when it's allowed to lie flat on the table the bottom will get too hot to touch.


The problem became more serious when the modem was taken apart, the main processor on the board was hot enough to give you a burn.



Although I have no doubt the modem is operating within operating ranges it's still inexcusable how sometimes a simple heatsink that would've cost less than a dollar would've remedied the situation and greatly reduced the number of these modems that have been known to fail.

An easy fix for those of you DIY'ers is to take some aluminum thermal duct tape and to fold your own semi-pro looking heat sink.



Remember the trick when trying to create your own is to start with an accordion fold. The higher you can get the cooling fins the better your cooling will be. The denser you can pack them together likewise will help as well. Passive cooling is a function of surface area so when designing your heat sink try and maximize that. Although I haven't done it another good idea is to mount a cooling fan nearby to encourage airflow over the chip.

I hope in the future manufacturers won't take shortcuts after an hour of testing temperatures appear to be dramatically reduced.

1 comment:

tehnimax said...

Hello !

I have a Speedstream 4100 and it doesn't seem to talk anything over ethernet. I thought the RJ45 connector is the culprit and I have an investigation in progress. I want to add USB connection to my 4100 and I need the identifications of the components related to the USB port. Can you help me with them ?


Thank you !