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Little explorations with HP calculators (no Prime)
04-02-2018, 06:17 PM
Post: #304
RE: Little explorations with HP calculators (no Prime)
(04-02-2018 05:34 PM)rprosperi Wrote:  I have been asked to replaced many device-side connectors, but rarely a PC-side. No doubt this is due to more careless handling/operation, but whatever the reason, these simply fail more often.

It's not exactly a theory , these are manufacturers specs.

I would suggest failure is pretty much always prematurely down to careless handling/accidents, but the micro/mini have a better chance of serious board damage... for it to actually 'wear out' as per the data-sheet is virtually unheard of.
Two distinct kinds of failure.

The plug will act as a lever when an external 'accident' happens and rips the tracks off (if you're very very lucky and the board is tough enough, the lead-free soldering breaks free before the actual tracks, otherwise an accident will just rip the tracks to bits, often destroying any chance of repair.)
They rely on two soldered lands on the board for physical security (as well as a small amount offered by the connection tracks.)

USB A sockets are a bit more substantial and sometimes (but not always) have 'through-hole soldered' lugs for physical security. micro and mini sockets just aren't big enough for this kind of help.

For actual plugging in and unplugging if you're gentle doing so, the micro and mini stand a better chance of wear resistance.

Quote:If the mini-USB port of the 50g is damaged, you must replace the 50g.

Particular reason ?

If the socket itself is damaged and still secure on the board , surely a replace of the socket is on the cards (with the appropriate smd rework kit) ?
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RE: Little explorations with HP calculators (no Prime) - Zaphod - 04-02-2018 06:17 PM

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