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 Post subject: Kingston SSDnow 300 no Power
PostPosted: September 4th, 2017, 2:53 
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Joined: August 8th, 2007, 6:32
Posts: 1181
Location: inside ROM
Kingston SSDnow 300 no Power at all, anyone worked on this problem before?
It seems it uses electronic fuse/protection?

Thank you


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 Post subject: Re: Kingston SSDnow 300 no Power
PostPosted: September 4th, 2017, 4:32 
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Joined: September 8th, 2009, 18:21
Posts: 9620
Location: Australia
I would measure +5Vout, and V1 - V4.

The two ICs marked "13 1D U30" are equivalent to an APW8804.

The "|4BED" 6-pin IC is an MP6400DJ-01.


PCB protection devices - Electronic Fuse:
http://www.hddoracle.com/viewtopic.php?f=100&p=8872

NIS5135, ON Semiconductor, 3.6A 5V Resettable Electronic Fuse, marking 35:
https://www.onsemi.com/pub/Collateral/NIS5135-D.PDF

AP3422, BCD Semiconductor, Dual 1.1MHz, 800mA Synchronous DC-DC Buck Converter, 2.5V - 5.5V in, marking BDC, DFN-3×3-10:
http://www.bdtic.com/datasheet/diodes/AP3422.pdf

APW8804, Anpec, synchronous buck converter with high and low side MOSFETs, 3A, 2.6V - 6V in:
http://www.wpgholdings.com/uploads/bu/bu_3/20140917_Memory/APW8804a4.pdf
http://www.anpec.com.tw/ashx_prod_file.ashx?prod_id=687&file_path=20131024191901739.pdf&original_name=APW8804.pdf

MP6400DJ-01, adjustable Programmable-Delay Supervisory Circuit, marking 4Bxx, TSOT23-6:
http://www.monolithicpower.com/desktopmodules/documentmanage/api/document/getdocument?id=1003


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5V_e-fuse_2.jpg
5V_e-fuse_2.jpg [ 230.42 KiB | Viewed 264 times ]

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 Post subject: Re: Kingston SSDnow 300 no Power
PostPosted: September 4th, 2017, 17:21 
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Joined: September 8th, 2009, 18:21
Posts: 9620
Location: Australia
Here is my guess as to the function of the rear connectors:
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Assuming the supplies test OK, I would first determine the ground pins. The UART port probably has a supply pin (+3.3V ?) in addition to RxD, TxD and ground.

I suspect that one of the two shorting (?) pins is grounded while the other could be connected to an R/B* pin of the NAND array, or perhaps to the controller via a dedicated pin.

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