All times are UTC - 5 hours [ DST ]




Post new topic Reply to topic  [ 21 posts ]  Go to page 1, 2  Next
Author Message
 Post subject: over powerd my board, help a numpty out
PostPosted: November 12th, 2018, 19:37 
Offline

Joined: November 12th, 2018, 19:29
Posts: 5
Location: australia
Hey guys

So I wired up a China HDD docking station with the incorrect voltage.. wahoooo


can you guys please see attached and give me a direction on where to test the pcb and how to dodgey it up

I go alright with a soldering iron and a multi meter

Thanks smart people


Attachments:
www.jpg
www.jpg [ 4.91 MiB | Viewed 12006 times ]
20181113_102828.jpg
20181113_102828.jpg [ 6.04 MiB | Viewed 12007 times ]
Top
 Profile  
 
 Post subject: Re: over powerd my board, help a numpty out
PostPosted: November 12th, 2018, 20:11 
Offline

Joined: November 12th, 2018, 19:29
Posts: 5
Location: australia
ooooo sounds riveting

So even if I get a donor pcb I still have to move a chip? which chip is the rom chip?

cheers budd


Top
 Profile  
 
 Post subject: Re: over powerd my board, help a numpty out
PostPosted: November 12th, 2018, 21:30 
Offline
User avatar

Joined: September 8th, 2009, 18:21
Posts: 15461
Location: Australia
The photo identifies the "BIOS" IC (aka "ROM").

https://www.hdd-parts.com/13022903.html
https://sep.yimg.com/ay/yhst-14437584971410/91711095-6.gif

Measure the voltages at the +5V and +5V(fused) test points. Also measure the resistances of the circled components.


Attachments:
diodes_fuse.jpg
diodes_fuse.jpg [ 268.18 KiB | Viewed 11990 times ]

_________________
A backup a day keeps DR away.
Top
 Profile  
 
 Post subject: Re: over powerd my board, help a numpty out
PostPosted: November 12th, 2018, 22:05 
Offline

Joined: November 12th, 2018, 19:29
Posts: 5
Location: australia
looks like we found a busted fuse

jump it ? can i just solder over the top?

Thanks so much


Attachments:
diodes_fusessss.jpg
diodes_fusessss.jpg [ 93.24 KiB | Viewed 11982 times ]
Top
 Profile  
 
 Post subject: Re: over powerd my board, help a numpty out
PostPosted: November 12th, 2018, 22:52 
Offline
User avatar

Joined: September 8th, 2009, 18:21
Posts: 15461
Location: Australia
One of the diodes is shorted. You'll have to remove the TVS diode (the other would a Schottky rectifier). Can you tell us the part markings on each diode? I can see an "R" but nothing else.

Edit: I see that the other is an "A1".

_________________
A backup a day keeps DR away.


Last edited by fzabkar on November 12th, 2018, 22:56, edited 1 time in total.

Top
 Profile  
 
 Post subject: Re: over powerd my board, help a numpty out
PostPosted: November 12th, 2018, 22:55 
Offline

Joined: November 12th, 2018, 19:29
Posts: 5
Location: australia
r and a1


Attachments:
r a1.jpg
r a1.jpg [ 3.56 MiB | Viewed 11975 times ]
Top
 Profile  
 
 Post subject: Re: over powerd my board, help a numpty out
PostPosted: November 12th, 2018, 22:58 
Offline
User avatar

Joined: September 8th, 2009, 18:21
Posts: 15461
Location: Australia
RSA5M, Rohm, TVS diode, 200W, 5V, marking A1:
http://www.rohm.com/web/global/datasheet/RSA5M
http://www.1688eric.com/upload/pdf/2012 ... RSA5MG.pdf

Try removing A1. If the short goes away, then replace the fuse (or bridge it if you feel lucky).

I would test the PCB off the drive. Measure the voltages (V1 - 3) at each of the two inductors (near the TLS2601 motor controller, and the transistor.


Attachments:
regs.jpg
regs.jpg [ 230.95 KiB | Viewed 11970 times ]

_________________
A backup a day keeps DR away.


Last edited by fzabkar on November 12th, 2018, 23:08, edited 1 time in total.
Top
 Profile  
 
 Post subject: Re: over powerd my board, help a numpty out
PostPosted: November 12th, 2018, 23:06 
Offline

Joined: November 12th, 2018, 19:29
Posts: 5
Location: australia
Sir

You are my hero, ill let you know how it goes


Top
 Profile  
 
 Post subject: Re: over powerd my board, help a numpty out
PostPosted: November 13th, 2018, 21:17 
Offline

Joined: August 7th, 2015, 5:48
Posts: 44
Location: New York, USA
fzabkar wrote:
The photo identifies the "BIOS" IC (aka "ROM").

https://www.hdd-parts.com/13022903.html
https://sep.yimg.com/ay/yhst-14437584971410/91711095-6.gif

Measure the voltages at the +5V and +5V(fused) test points. Also measure the resistances of the circled components.


:D cool!


Top
 Profile  
 
 Post subject: Re: over powerd my board, help a numpty out
PostPosted: October 12th, 2019, 18:18 
Offline

Joined: October 12th, 2019, 18:11
Posts: 1
Location: Mexico
Spildit wrote:
Most likely it's better to just replace the PCB with a known good one moving the ROM chip from the bad PCB to the donor compatible PCB.

And pray for the pre-amp to be ok ...

And DO NOT DAMAGE THE ROM CHIP otherwise it's bye-bye data for good ...


Hello! If I have do have the donor PCB and move the BIOS ROM from the damaged one to the donor PCB, do I need any kind of special software or tools to make it work? or will it just work like that? like just connect it the my PC start the data backup?

Greetings!


Top
 Profile  
 
 Post subject: Re: over powerd my board, help a numpty out
PostPosted: May 20th, 2023, 1:50 
Offline

Joined: May 20th, 2023, 1:34
Posts: 8
Location: Kiev, UA
fzabkar wrote:
RSA5M, Rohm, TVS diode, 200W, 5V, marking A1:
http://www.rohm.com/web/global/datasheet/RSA5M
http://www.1688eric.com/upload/pdf/2012 ... RSA5MG.pdf

Try removing A1. If the short goes away, then replace the fuse (or bridge it if you feel lucky).

I would test the PCB off the drive. Measure the voltages (V1 - 3) at each of the two inductors (near the TLS2601 motor controller, and the transistor.



Dear friend! I accidentally found this topic on the forum, it's been quite a while...
i hope you answer me.
Topic-starter never answered your instruction - measure the voltage at points v1-v3.
I have exactly the same controller and I want to ask you:
What should be the voltage at points b1-b3?
Sincerely, I look forward to your reply.


Top
 Profile  
 
 Post subject: Re: over powerd my board, help a numpty out
PostPosted: May 20th, 2023, 17:04 
Offline
User avatar

Joined: September 8th, 2009, 18:21
Posts: 15461
Location: Australia
@dzonik, what voltages are you seeing at those test points?

_________________
A backup a day keeps DR away.


Top
 Profile  
 
 Post subject: Re: over powerd my board, help a numpty out
PostPosted: May 21st, 2023, 10:22 
Offline

Joined: May 20th, 2023, 1:34
Posts: 8
Location: Kiev, UA
v1- 0,89v
v2- 2,49v
v3 - 5,04v


Top
 Profile  
 
 Post subject: Re: over powerd my board, help a numpty out
PostPosted: May 21st, 2023, 10:26 
Offline

Joined: May 20th, 2023, 1:34
Posts: 8
Location: Kiev, UA
measurements were made without a hermetic block, on only a pcb


Top
 Profile  
 
 Post subject: Re: over powerd my board, help a numpty out
PostPosted: May 21st, 2023, 12:02 
Offline
User avatar

Joined: September 8th, 2009, 18:21
Posts: 15461
Location: Australia
V1 and V2 appear to be consistent with a modern ARM Vcore and Vio.

_________________
A backup a day keeps DR away.


Top
 Profile  
 
 Post subject: Re: over powerd my board, help a numpty out
PostPosted: May 21st, 2023, 15:02 
Offline

Joined: May 20th, 2023, 1:34
Posts: 8
Location: Kiev, UA
Thanks a lot!
It seems to me that I found the reason - this is a combi spindle driver and a magnetic head unit. (also this chip generates a voltage of 2.5 and 0.9 V?)
Chip output to the spindle motor - continuity - 0.78 ohm!
both among themselves and on a common ... Apparently, the output power switches burned out ...
I found a donor board, (all required numbers match)
I ask for advice:
Is it better for me to replace R2A30027 (TLS2601), or is it better to solder the BIOS chip (sop8)?
thanks


Top
 Profile  
 
 Post subject: Re: over powerd my board, help a numpty out
PostPosted: May 21st, 2023, 15:07 
Offline

Joined: May 20th, 2023, 1:34
Posts: 8
Location: Kiev, UA
And I also have a question, for my general development :) :
what kind of chip marked 3260 qfn16?
I couldn't find a datasheet anywhere...


Top
 Profile  
 
 Post subject: Re: over powerd my board, help a numpty out
PostPosted: May 21st, 2023, 15:45 
Offline
User avatar

Joined: September 8th, 2009, 18:21
Posts: 15461
Location: Australia
I think most people would recommend transferring the ROM ("BIOS chip"), but be aware that you must not damage this IC.

I don't recognise the "3260" IC, but sometimes these PCBs have a tri-axis accelerometer in that area. That said, your drive has a shock sensor and two rotational vibration sensors, so it would be unusual for it to have an additional accelerometer. But I could be wrong ...

In this PCB that location is unpopulated, which would be consistent with an optional accelerometer:

https://sep.turbifycdn.com/ay/yhst-14437584971410/91711095-6.gif

Also, the presence of all those passive components would suggest the IC has an an analogue section.

Digital accelerometers in 2.5" HDDs:
http://www.hddoracle.com/viewtopic.php?p=19497#p19497

_________________
A backup a day keeps DR away.


Top
 Profile  
 
 Post subject: Re: over powerd my board, help a numpty out
PostPosted: May 22nd, 2023, 11:59 
Offline

Joined: May 20th, 2023, 1:34
Posts: 8
Location: Kiev, UA
Thanks!


Top
 Profile  
 
 Post subject: Re: over powerd my board, help a numpty out
PostPosted: May 22nd, 2023, 12:01 
Offline

Joined: May 20th, 2023, 1:34
Posts: 8
Location: Kiev, UA
thanks!


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 21 posts ]  Go to page 1, 2  Next

All times are UTC - 5 hours [ DST ]


Who is online

Users browsing this forum: No registered users and 40 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group