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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#1
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Sony PSP 3003 plaything
Arcing and sparking reported. 2x3mm piece of broken off spark erroded
phosphor bronze spring dropped out of the case, on opening. This came from a 2 way power socket of size that could probably take mains V but not 2A it would seem, wired to the power-in connector and position under the LCD. Between that and fuse? marking F6602 2.5A on the overlay, a large area of smoke staining. Cleaning off most of the smoke, one 2 land SMD seems a bit pitted and which lump is / was? the fuse , some spark erroded pcb trace, anyone know of a decent pic of this area. http://www.llamma.com/PSP/repair/ima...se/Td-Fuse.jpg off http://www.llamma.com/PSP/repair/PSP_fuse_repair.htm seems a different model, the white block , the 2 wire connector to power socket is the same While at it ,the battery only measures mV , will it recover or some sort of active sw/relay inside? |
#2
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Sony PSP 3003 plaything
not making contact with the battery , 1.26V , should be 3.6V
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#3
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Sony PSP 3003 plaything
Anyone know what a blown one of these tiny sort of TD or LD fuses look like
http://www.llamma.com/PSP/repair/ima...se/Ld-Fuse.jpg http://www.llamma.com/PSP/repair/ima...se/Td-Fuse.jpg 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 |
#4
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Sony PSP 3003 plaything
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 |
#5
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Sony PSP 3003 plaything
On Mon, 27 Sep 2010 12:20:17 +0100, N_Cook wrote:
Better than my previous likely timewasting- inside a Kodak digital camera. Please do not say the words Kodak digital camera in my presence. -- Live Fast, Die Young and Leave a Pretty Corpse |
#6
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Sony PSP 3003 plaything
Meat Plow wrote in message
news On Mon, 27 Sep 2010 12:20:17 +0100, N_Cook wrote: Better than my previous likely timewasting- inside a Kodak digital camera. Please do not say the words Kodak digital camera in my presence. -- 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 |
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