On Tue, 16 Jan 2007 11:51:35 +1100, "Rod Speed"
wrote:

clare at snyder.on.ca wrote
Rod Speed wrote
lsmartino wrote
Rod Speed wrote

It would **** the environment much more to have every
low level component easily unpluggable and replaceable.

Please explain why.

It should be obvious. Try counting the cost of all those sockets for
all the ics, let alone what that would do to the size of the device etc.

You couldnt even use surface mount anymore either.

No reason subassemblies can not be replaceable.

No point when there is only one with stuff like
an ipod, electric toothbrush, cellphone etc.

Connectors today can be made extremely compact,

And still cost signifcantly more than no connector at all.

With the failure rate with PCs so low, its a complete waste of money.

and with LSI the active components can all be put
into one plug-in component worth a couple of dollars.

What they actually do is surface mount that on a single component and
allow what is needed for the owner/monkey to press to be connected etc.

SMT could still be used on the "backbone" which
could also be a low cost field replaceable part.

Why would it be low cost when its the bulk of the product
like with an ipod, a cellphone, a cordless phone, etc etc etc.

Because even the way they are built today they are "low cost". And I'm
talking things like 2000 dollar large screen TVs like the Sony
mentioned thad had the drivers in the non-replaceable cable to the
screen. The circuit in question likely costs Sony less than $3 to
install where it is. Add $10 to make it readilly replaceable, and you
increase the cost by 0.5%

There is absolutely NOTHING that cannot be made
serviceable in the consumer electronics arena.

Yes, but what is the point of making it easy to replace the
vast bulk of the device when the failure rate is so low ?

The failure rate is plenty high enough - even if you limit it to
"infant mortality" Failure within the lifespan of the display panel is
likely well over 5%. On some brands of laptop computers it's a whole
lot higher than that.

Yes, it makes sense to have cellphone batterys readily
replaceable, and the front cover etc, because batterys
do have a limited number of recharge cycles and people
do bugger up the covers quite often, but there isnt any
point in having more than a single module with all the
electronics on it with a cellphone or even a PC motherboard.

Will it cost more? Likely Does it have to? Not necessarily.

Corse it has to over no connector at all.
There are ways of doing things that add functionality without adding
cost.

Would people buy it? Smart people would.

I doubt it when they have adequate information on the failure rate.

I suspect some on this list would not.

Its not a list, they are newsgroups.

OK. picky, picky.



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