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Serious heat issue with Fuze V2
nexekho:
Ok, I understand that the Fuze V2 port isn't yet considered even stable but I've been playing around with it and it seems stable enough. I'm more worried about the blistering heat Rockbox seems to cause the little device to put out; it never even gets warm with the original firmware and fourty seconds of metronome is enough warrant to cause the screen to flicker and die (probably owing to the heat damaging the ribbon cable; when it cools down it comes back) and the battery to empty. I fully comprehend that it's a freetime project and it's nowhere near complete, but this is a serious potentially device ruining issue that I personally believe could warp/desolder components in minutes and the CPU clock rate needs to come right down before a Fuze blows up.
Chronon:
Solder requires very high temperatures to melt. I am pretty confident that the temperature of your player is quite a large margin away from this. If a cable was damaged, cooling would do nothing to improve its operation. The phenomenology that you are seeing most surely has another explanation. LCD not operating correctly probably has to do with some chip overheating.
It would be much more helpful if you can figure out exactly what conditions cause this behavior to appear.
Are other Fuze v2 owners seeing anything similar?
nexekho:
It hasn't actually fixed; after about ten minutes it's started flickering and the brightness appears capped at 40%. There is another thread where normal Rockbox usage has killed a FuzeV2's LCD. In my case it appears to be linked to the glowing ring of light; the screen problems only persist when it is on. Weirdly, it seems perfectly capable of displaying video on full screen brightness unless I do something that lights up the ring.
saratoga:
--- Quote from: nexekho on June 01, 2010, 08:21:28 PM ---I fully comprehend that it's a freetime project and it's nowhere near complete, but this is a serious potentially device ruining issue that I personally believe could warp/desolder components in minutes and the CPU clock rate needs to come right down before a Fuze blows up.
--- End quote ---
With the clock maxed out, the CPU only puts out ~150mW, which is not enough to heat the inside more then a degree or so. The only thing in the Fuze capable of generating that kind of heat is the lithium ion battery, and only if it fails. I strongly recommend you replace your fuze immediately. Serious battery failure is a fire hazard.
nexekho:
The battery in the Fuze is up top (I know, I've taken one apart before to try and save it from water death, sadly I failed) and this heat is coming from the very bottom left corner whenever the blue ring is on. The PCB shows that there is a big blocklike component of some description which looks like some kind of power amp. Given its close proximity to the USB socket I'd say that's what RB has possibly blown up.
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