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#1 |
Senior Member
Join Date: Sep 2018
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![]() Hello guys,
can you please help my identify components with numbers 53 and 59? They could be a diodes? This component 53 is connected in parallel between source and drain of a P Channel A2179 Mosfet. I wonder what is their purpose here. Thank you! |
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#2 |
Badcaps Veteran
Join Date: Jul 2011
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![]() This might help you
http://www.s-manuals.com/smd/53 Zener Diodes http://www.s-manuals.com/pdf/datashe..._fairchild.pdf Google search—> SMD diode “53” https://html.alldatasheet.net/html-p...UPA2719GR.html https://www.digchip.com/datasheets/p...A2719M-pdf.php Someone else would have to answer this question for you “ I wonder what is their purpose here. ” I hope this helps you
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9 PC LCD Monitor 6 LCD Flat Screen TV 30 Desk Top Switching Power Supply 10 Battery Charger Switching Power Supply for Power Tool 6 18v Lithium Battery Power Boards for Tool Battery Packs 1 XBox 360 Switching Power Supply and M Board 25 Servo Drives 220/460 3 Phase 6 De-soldering Station Switching Power Supply 1 Power Supply 1 Dell Mother Board 15 Computer Power Supply 1 HP Printer Supply & Control Board * lighting finished it * These two repairs where found with a ESR meter...> Temp at 50*F then at 90*F the ESR reading more than 10% 1 Over Head Crane Current Sensing Board ( VFD Failure Five Years Later ) 2 Hem Saw Computer Stack Board All of these had ![]() All of the mosfet that are taken out by bad caps ![]() Last edited by sam_sam_sam; 04-02-2021 at 03:56 AM.. |
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#3 |
Badcaps Veteran
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![]() The thumb nail picture is too small, there seems to be other markings (above the 59) on the devices? Since there are 3 in parallel I would almost suspect they are capacitors?
What is the board from? any numbers on the board? Can you tell how the circuit is used? is the mosfet just used as a switch? Last edited by R_J; 04-02-2021 at 11:05 AM.. |
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#4 |
Senior Member
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![]() Thank you sam sam sam.
R_J this is from Fujitsu H700 laptop board. I have no schematics, but I can guess that Mosfets are used for protection since thea are in close proximity of the batery. There is a current sensing resistor there. Last edited by Askic; 04-02-2021 at 11:59 PM.. |
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#5 |
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![]() It looks like a Tantalum capacitor to me too.
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