FYI: Tamper resistant fasteners in new XJ-A130 projectors!

[mpoulton]

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[polishedball]

My latest batch of XJ-A130's includes several with an "updated" laser module, which is assembled with two tamper-resistant fasteners. These two fasteners are in the lower layer of screws that holds the collimating lens plate and the diode block onto the heatsink. Not only do these screws have a funky triangular head (it's not standard tri-wing), they are installed with permanent thread locker! They cannot be unscrewed, I don't think. Fortunately a brute-force machine shop approach solves the problem just fine.

I was able to back these out with a standard tri-wing bit from my security set.

[mpoulton]

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[dsli_jon]

Hey mp -

Nice. The thread locker may be inconsistent. ...

Thanks for the '411'.... ...you also might try a little 'localized' heat - ie: with one of those little 'torch' lighters... fast-heat, finely-pointed, just on the head... or, perhaps a soldering iron, but that might need more time to soften the locker, thus spreading heat out to a wider area...

Just a thought...
peas...
j

[kitatit]

Hi mpoulton,

Maybe it's time to get medieval on it's ass!!

As the unit is not going back into service as is, a bit of destructive disassembly might be in order

I would just drill the head off the screw. As the screw is m2 a drill from 2mm-3.5mm or a 3/32-9/64th should do the trick. Run a vacuum cleaner close to the drill to keep that pesky swarf at bay.

Good luck
Kit

[mpoulton]

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[kitatit]

Nice work!


Heh heh heh... 'tamper proof" hehe heh heh. Bless em

[krazer]

In my findings I have found that any projector with a serial number starting in 1 on the second grouping (eg, wb032cjaf08-1xxxx for a A140 series)

I have found a few of them with exceptionally stiff thread locker, but for the most part a normal tri-wing screwdriver does the trick.

[White-Light]

I believe the bits are called "TP3".

Available Here in All Sizes: http://www.mcmaster.com/#triangle-sc...r-bits/=9dtrzk

TA18, 20, 23, 27

I got a set from Maplin with a single 3mm bit in but they don't seem to have them anymore:

[catalanjo]

My latest batch of XJ-A130's includes several with an "updated" laser module, which is assembled with two tamper-resistant fasteners. These two fasteners are in the lower layer of screws that holds the collimating lens plate and the diode block onto the heatsink. Not only do these screws have a funky triangular head (it's not standard tri-wing), they are installed with permanent thread locker! They cannot be unscrewed, I don't think. Fortunately a brute-force machine shop approach solves the problem just fine.

Why XJ-A130 ? .............. and not XJ-A140

Cheers