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 Post subject: Short PCB of ST1000LM025
PostPosted: June 15th, 2017, 5:10 
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Joined: December 14th, 2013, 17:10
Posts: 210
Location: istanbul
Selam Everbody.

is it possible to fix this PCB of ST1000LM025?

PCB is short. it doesn't let the pc boot.
or shutting down PC immediately at work.

i desoldered the TVS diode but it's O.K. at separetly.

i also have a ST1000LM024
1V REV.7
20131107
U6B 2TRT

must i try the rom transfer?


Attachments:
st1000lm025 jack.jpg
st1000lm025 jack.jpg [ 51.96 KiB | Viewed 4339 times ]
st1000lm025.jpg
st1000lm025.jpg [ 97.94 KiB | Viewed 4339 times ]
st1000lm025 pcb back.jpg
st1000lm025 pcb back.jpg [ 140.54 KiB | Viewed 4339 times ]
st1000lm025 pcb marked.jpg
st1000lm025 pcb marked.jpg [ 255.45 KiB | Viewed 4339 times ]
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 Post subject: Re: Short PCB of ST1000LM025
PostPosted: June 15th, 2017, 14:03 
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Joined: November 29th, 2006, 10:08
Posts: 7843
Location: UK
You can use either a USB or SATA PCB with same MCU (the square Marvell "M") and same motor chip (the rectangular Ti chip) and switch the ROM chip.

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 Post subject: Re: Short PCB of ST1000LM025
PostPosted: June 15th, 2017, 15:57 
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Joined: September 8th, 2009, 18:21
Posts: 15529
Location: Australia
AFAICT, a short on the 5V supply could be due to the bridge IC, motor controller, or any of the MLCCs adjacent to these chips. Your last photo shows both capacitors and inductors. The inductors should be OK -- they will normally test shorted. I would remove each of the capacitors, one by one, until the short hopefully goes away. Don't remove the inductors.

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