<div dir="ltr"><div>
Hi Houpu,</div><div><br></div><div>It's definitely a dead LED (we have another P7 system and I tested that working LED on the aforementioned system). I don't know if ours is a 3V LED, but the link you provided sure looks like the same thing on our PCB. <br></div><div><br></div><div>Thank you!</div><div>Kyle<br>
</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, Jul 10, 2024 at 1:29 PM Houpu Li <<a href="mailto:houpuli0@gmail.com">houpuli0@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div dir="ltr">Hi Kyle,<div>I don't know if a DIY component fix would be something you'd like to risk or if that goes too far - if it shortens the circuit, then it might cause damages that need a much more expensive fix. <br></div><div><div>And a disclaimer - this is not really my expertise, my circuit engineering skill is more on a hobbyist level. <br></div><div><br></div><div>But if you are willing to try, and you have already traced it down and are certain that it is the LED itself having a problem (instead of a circuit or LED driver issue), maybe you can just replace the LED bead.</div><div>This small board looks fairly simple, and the LED bead looks very similar to this one: </div><div><a href="https://urldefense.com/v3/__https://www.digikey.com/en/products/detail/lumileds/LXML-PWC1-0100/3961262__;!!IBzWLUs!SBq9qAo9aUN0g9IcTfFuvpqcdS3KGqUS6onxqFLtbATkwDtDivxLQ5_QWzBePu9tYL9A2BqA5WGhQa5W41Lx$" target="_blank">https://www.digikey.com/en/products/detail/lumileds/LXML-PWC1-0100/3961262</a><br></div><div>It's a 3V white LED, so if the voltage of your LED is also 3V and the size matches, I believe it should be compatible or even be the identical model.</div><div>The LED chip appears to be surface-mounting with 3 pads on the bottom, so it requires some techniques to remove and solder it - someone with training in electrical engineering should be able to do it; they probably also will have the knowledge to evaluate the compatibility and risks for the replacement.</div><div>Hope this info helps.</div><div><br></div><div>Best </div><div>Houpu</div></div><div><br></div><div><div dir="ltr" class="gmail_signature"><div dir="ltr"><div>----------------------------------------------</div><div>Houpu Li</div><div>Asst. Project Scientist. </div><div>Jack Baskin School of Engineering</div><div>UC Santa Cruz, California, USA</div><div><a href="mailto:hli322@ucsc.edu" target="_blank">hli322@ucsc.edu</a></div><div><a href="mailto:houpuli0@gmail.com" target="_blank">houpuli0@gmail.com</a></div><div>+1-4044229896</div><div><br></div></div></div></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, Jul 9, 2024 at 4:55 PM Kyle Keenan <<a href="mailto:kckeenan@seas.upenn.edu" target="_blank">kckeenan@seas.upenn.edu</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div>Hello LabNetwork,</div><div><br></div><div>We have a KLA-Tencor P7 stylus profilometer that has had a dead LED light source for two months, and I was just informed by KLA that it will be another 3.5 months until the "estimated" ship date of the order I placed way back when for a replacement. This seems to be an extremely long time to have a tool down for such an easy to fix problem, and I'm hoping someone out there has an alternate supplier for the part, or a suggestion for a workaround fix. For reference, the part number and description are
0266756-00,
ASSY,CBL,LED,P7. I have also attached pictures of our dead LED, for reference. Please note: it has to be that shape and size (~17.5 x 8mm)or it will not fit in our system. Any help would be appreciated.</div><div><br></div><div>Thank you,<br><span class="gmail_signature_prefix">-- </span><br><div dir="ltr" class="gmail_signature"><div dir="ltr"><div>Kyle Keenan</div><div><br></div><div>Senior Manager - Laboratory Operations<br></div><div>Quattrone Nanofabrication Facility</div><div>University of Pennsylvania</div><div>P: 215-898-7560</div><div>F: 215-573-4925<br></div></div></div></div></div>
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</blockquote></div><br clear="all"><br><span class="gmail_signature_prefix">-- </span><br><div dir="ltr" class="gmail_signature"><div dir="ltr"><div>Kyle Keenan</div><div><br></div><div>Senior Manager - Laboratory Operations<br></div><div>Quattrone Nanofabrication Facility</div><div>University of Pennsylvania</div><div>P: 215-898-7560</div><div>F: 215-573-4925<br></div></div></div>