CDI-910 Power Supply Question

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WillowFox
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CDI-910 Power Supply Question

Post by WillowFox » Tue Feb 13, 2018 3:22 am

Is 220-230 degrees Fahrenheit too hot for the mosfet to run in the CDI-910?
Also, I am installing an HDMI conversion board, after I clean up some circuitry inside, and mount the battery housing to the memory so it is not loose in here like it is now.
My clock IC snapped in half, the crystal and battery potting came off, so I was able to tack off of each side of the IC with wires connected to a crystal and a battery housing. I am using a 2330 battery, is that too much or should it be fine? I figured a 3v mainboard battery should be okay, but not sure if the battery capacity is overkill or should I even worry about it?
Screenshot_20180212-205127.jpg
CDi-910 Thermal (2 days idle) in Fahrenheit
Screenshot_20180212-205127.jpg (115.68 KiB) Viewed 821 times
Screenshot_20180212-205127.jpg
CDi-910 Thermal (2 days idle) in Fahrenheit
Screenshot_20180212-205127.jpg (115.68 KiB) Viewed 821 times
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Close up of CDi-910 power supply thermal
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Shikotei
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Re: CDI-910 Power Supply Question

Post by Shikotei » Fri Feb 23, 2018 8:32 pm

I haven't ever measured temperatures of the CD-i consoles, but know they don't exactly stay frosty.
I'd assume temperatures around the power supply to be somewhat near 50-70 Celsius as 'acceptable' during operation.

But as a techie I'm worried. Not many devices are built to operate at high temperatures, even old stuff. I remember my laptop (heavy duty from 2010 to 2017) getting fried at 90-100 C (long after the thermal security (used to trigger at 70 C) broke because it overheated before).

Do you know the idle temperatures of your CD-i before you added the HDMI converter? Perhaps the added power requirement causes the console to operate beyond specs?

C to F:
50 = 122
60 = 140
70 = 158
80 = 176
90 = 194
100 = 212
110 = 230

WillowFox
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Re: CDI-910 Power Supply Question

Post by WillowFox » Thu Mar 01, 2018 2:08 am

This is actually before any modifications other than the save chip battery added.
I think that mosfet is running a little hot, but not way out of scope.
I may put a fan in the unit and redo the heatsync compound on the mosfet, or even put a set of cooling fins on there as well, instead of that flimsy metal heat wick they have, that is little more than a shard of metal.

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