Comments on: Missing Part Number? https://jestineyong.com/missing-part-number/ Semiconductors, Test Equipments, Circuit Board Troubleshooting, Electronic Repair Courses and Many More! Sat, 04 Jul 2009 05:12:08 +0000 hourly 1 https://wordpress.org/?v=5.4.19 By: admin https://jestineyong.com/missing-part-number/comment-page-1/#comment-2864 Sat, 04 Jul 2009 05:12:08 +0000 https://www.jestineyong.com/?p=2185#comment-2864 HI Waleed,

Yes that was true but some board do not have the board location label and some company (i came across one company that sell UPS)purposely remove/erase the part number not only to transistor but to ICs too. This will make the repair technician have a hard time in fixing the UPS.

Jestine

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]]> By: Waleed https://jestineyong.com/missing-part-number/comment-page-1/#comment-2858 Thu, 02 Jul 2009 19:30:16 +0000 https://www.jestineyong.com/?p=2185#comment-2858 test the part and the reading should tell you if that is a mos N fet or a transitor. for mos n fet, I always use Buz 90 and it works every time. also the reading on the pc board should tell you what it is and where is the source, drain and gate.
I never came across a part that does not have numbers on it. so far so good.
Waleed

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