On Jul 22, 7:30*pm, "Arfa Daily" wrote:
"Ian Field" wrote in message

...











"Arfa Daily" *wrote in messagenews

"Ian Field" wrote in message
...

"N_Cook" *wrote in ...

Arfa Daily wrote in message
...
God, how I hate the rotten stuff. I've now been caught twice in two
weeks
with Sony KSS xxx series lasers. For those who don't know, these lasers
(in
common with lots of other makes) are shipped with the laser diode
shorted
by
a blob of solder across two closely spaced pads on the little pcb that
carries the connector and power pot. You remove this blob once the
device
is
installed, by just touching your iron tip against it. The solder has
always
in the past, just 'flowed' onto the iron tip by surface tension, I
guess.
However, all that has changed with lead-free. Because the bloody stuff
'strings', you have to be REALLY careful that a barely visible whisker
hasn't been left across the pads.

If this happens, you're left with a laser that doesn't burn, and hence
won't
read discs. The first one last week, was in a Pioneer, and was
reasonably
easy to get at, but this morning's one wasted a whole bunch more time,
because the laser was in the depths of a mechanism in a 300 disc
'jukebox'
type player. You can't test without mostly reassembling the mech.

So now, rather than relying on a removal method that just worked, and on
most units could be carried out with the laser in situ and connected, it
is
necessary to remove the solder blob with the laser right out so that you
can
hold it up to a light to make sure that the gap is completely clear.
Which
rather defeats the purpose of having the laser shorted in the first
place
...

Arfa

So I suppose the lesson is solder a loose wire link across and remove
their
blob , all in good lighting/viewing. Assemble and cut or desolder your
wire
fudge bridge after placement.

***Pretty much what I was thinking - maybe a loop of that thin Kynar
"kludge" wire that you can wiggle off once the laser is safely in. Maybe
a strip of thick black anti-static bag & a paper clip on the end of the
flexiprint between the blob coming off & the link going on.

Yes, all valid suggestions, but what ****es me off is that you have to
start
coming up with this crap in order to make what was a perfectly suitable
system work again, now that they've changed over to this useless,
not-fit-for-purpose electric glue ... * *:-(

Arfa

***Just remembered an amusing anecdote: One of the home computer firms in
the 80's (might have been Sinclair?) quit doing home build kits after
someone returned a kit to their service dept, all the components very
neatly assembled into the PCB - and secured with polystyrene cement!

***I'd put money on it being one of the Brussels suits behind the RoHS
directive.

ROTFLMAO !!!!

Arfa

Cement!!!
Some people should not be allowed to operate a door bell. Idiocy has
no bounds. Lenny