Sony PSP 3003 plaything

not making contact with the battery , 1.26V , should be 3.6V

Anyone know what a blown one of these tiny sort of TD or LD fuses look like

a component that size, as far as I can trace, is the only link to the rest of the mobo and is o/c to ohms and 2V diode test. It is not burnt-pitted as I thought but is a neat designed pit and otherwise no burnt appearance. Has a labelled cover blown off , perhaps the fusing element passes through this pit to the other land. Being black and only x30 scope, difficult to make out, let alone probe

Pit was rectangular about 100 x 150 micron, off centre, with a small blob of ex-molten ? metal, no hole seen . Decided that was the 2.5A fuse not the

5x3.5mm "tensile test piece" shaped intact metal lump nearer the marking. Under some tinplate screening there were 2 more of these 1.8x.8mm lumps this time marked LB , not blown apart and 1A on overlay, F0011 open , F7001 closed. Bridged the first with 3A fuse and second with 1A. Now have current from 5V supply , pulsing from base level of 5mA to 16mA draw, power sw moved to on or not, battery in or not. Better than my previous likely timewasting- inside a Kodak digital camera. Now to find time to track down where the powerFET is. I would have thought such basic tech info would be out there somewhere, a "roadmap" of major components, obviously not a schematic

Please do not say the words Kodak digital camera in my presence.

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Live Fast, Die Young and Leave a Pretty Corpse

At least the one I looked at failed for a respectable reason, Owner decided to use an opposite polarity supply. This PSP looks as though it initially failed from pbfitis at the solder point of internal secondary power connector at the pcb trace, then heat melted plastic , arcing broke a bit of phosphor bronze . The user accessible power soocket , unusually, is nicely decoupled from user induced mechanical failure as it uses wire tails, not soldered to pcb of any sort

I have a Kodak V1253 I'm working on. Waiting on the owner to provide me with the proprietary interface to USB mini so I can attempt to reflash the firmware which seems to be corrupted. I have read much negativity on this particular model mostly firmware-oriented. The camera does just about everything it's supposed to except take pictures or video. It doesn't even attempt to enter those functions. And certain functions when invoked actually invoke different functions than requested. No chance send back to repair, would cost as much as new. The odd functions plus all the blogging on camera oddities leads me to think a firmware refresh or update may cure the thing. If not, the owner doesn't want it back. Has a nice large panel on the back that could be useful for other stuff.

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Live Fast, Die Young and Leave a Pretty Corpse

Hopefully with PSPs , the schottky across the i/p and 2.5A fuse , would knock out fuse before shottky going o/c, in reverse powering. Kodak seemed not to have that basic protection. Hot chippery resulted in the kodak case. At least I learnt how to deal with ultra miniature 0.5mm spcing ribbon connector ALPS KS 8E302 (30x microscope read this), wedge goes in the other way to usual and see-saw style grip to the ribbon lands. Nothing elucidatory googling on that connector system

I think this "tensile test piece" is the tab of the powerfet, active part completely blown off the tab and as no trace of die, presumably isolated tab , as also on a ground plane. Or could the 0V line be switched? Cannot even see what orientation as no top-side traces to G,S,D and no pads seen. Desoldering the tab and then desolder wicking does not totally remove the solder and just a neat solder rectangle on the pcb, very odd.