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N_Cook N_Cook is offline
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Default Harmon Kardon MS-150 ...

On 23/01/2014 17:54, Arfa Daily wrote:


"N_Cook" wrote in message
...
On 22/01/2014 18:11, Arfa Daily wrote:
Anyone on here had the misfortune to have work on one of these POS ? If
so, how do you get into it ? It's got me beat. Front grille comes off,
and a number of obvious screws then exposed. On the bottom, below the CD
drive, is a plastic 'plate screwed between the front and rear case
halves. Remove that, and the CD drive comes with it. That can all be
unplugged and removed. That then exposes a PCB, again screwed between
the front and rear halves. Four screws out of that, and the board is
then adrift, but not going anywhere, as it is still apparently fixed to
the case rear half by a screw into the phono connector block, that's
behind a thick plastic stuck-in trim panel. With all that lot out, the
front case-half appears to be largely adrift from the rear, except right
around the middle, where it 'feels' as though there's another screw
lurking, but nothing visible from any angle, front or rear.

I've even taken the speakers out to make sure that there are no other
screws behind them.

So I'm stuck now. Anyone know the secret ... ? d:-\

Arfa


Have you tried low temp hot air over the stuck on trim, to soften glue


No, I haven't. There's a limit to the amount of time that I'm prepared
to spend on this consumer junk, governed entirely by the law of
diminishing returns. To be honest, if getting inside it involves
removing glued-on trims, then I am not interested beyond the point that
I have now reached. If someone knew the product enough to say "You have
to stand it on one corner and clout the opposite corner with the heel of
your hand" in much the way that you had to know the 'secret' way to bash
monitor cabinets, then fair enough, but given that there is absolutely
no service info out there for the product, and almost certainly no
spares either, then I'm now drawing a line under it. Tomorrow, it will
go back to the shop that took it in, unrepaired. I have already spoken
to them about it, and their response was fair enough ....

Arfa


So nothing learnt then.
My equivalent current situation is an expensive to replace (because of
all the custom-made wiring ) for a 100V distributed PA system and blown
ps, posted below. Flexa rack system, absolutely no useful techy info out
there.
Got some replacement Viper 12A SMPS ICs today, to replace the
malfunctioning one in there. If some other downstream problem after
that,then will at least have found and reported the info discovered so
far. At least that amp has industry standard components , idents not
rubbed off . No custom firmware uC so eminently repairable compared to a
lot of anonymised stuff