All times are UTC - 5 hours [ DST ]




Post new topic Reply to topic  [ 61 posts ]  Go to page Previous  1, 2, 3, 4  Next
Author Message
 Post subject: Re: Kingston SSDNOW 300 Case Opening
PostPosted: May 13th, 2018, 16:38 
Offline
User avatar

Joined: September 8th, 2009, 18:21
Posts: 10355
Location: Australia
Let me see if I understand you correctly.

You set your DMM on the 200 ohms resistance range.

You power off the SSD.

You connect one probe to one side of the capacitor and the other probe to the other side of the capacitor.

You now see 0.3 ohm on your meter.

You repeat this procedure for all capacitors and get the same result.

Is this correct?

_________________
A backup a day keeps DR away.


Top
 Profile  
 
 Post subject: Re: Kingston SSDNOW 300 Case Opening
PostPosted: May 13th, 2018, 17:21 
Offline

Joined: May 9th, 2018, 14:50
Posts: 22
Location: SSD_Drive
correct
sometimes 0.2 when measured again I've got 0.3


Top
 Profile  
 
 Post subject: Re: Kingston SSDNOW 300 Case Opening
PostPosted: May 13th, 2018, 17:35 
Offline
User avatar

Joined: September 8th, 2009, 18:21
Posts: 10355
Location: Australia
Kingston wrote:
correct
sometimes 0.2 when measured again I've got 0.3

Wow! I can't see a solution for you. Sorry. :-(

_________________
A backup a day keeps DR away.


Top
 Profile  
 
 Post subject: Re: Kingston SSDNOW 300 Case Opening
PostPosted: May 14th, 2018, 1:44 
Offline

Joined: May 9th, 2018, 14:50
Posts: 22
Location: SSD_Drive
thank you for your effort

question
there may be more than one component causing it or is it definitely one component causing it?


Top
 Profile  
 
 Post subject: Re: Kingston SSDNOW 300 Case Opening
PostPosted: May 14th, 2018, 2:00 
Offline
User avatar

Joined: September 8th, 2009, 18:21
Posts: 10355
Location: Australia
The flash controller would require a core voltage (~ 1V), so if Vcore is shorted, then one would have to suspect the controller. The NAND array would have its own supplies (I would think), so AFAICS there must be at least two bad components. I really can't imagine how your SSD could have become damaged in this way. :o

Does any IC heat up?

_________________
A backup a day keeps DR away.


Top
 Profile  
 
 Post subject: Re: Kingston SSDNOW 300 Case Opening
PostPosted: May 14th, 2018, 2:35 
Offline

Joined: May 9th, 2018, 14:50
Posts: 22
Location: SSD_Drive
everywhere is dead cold
except one area
1 or the 2 chips below V3 (either 13 1E and the chip left to it or both (It's too small to say for sure which one) ) is getting warm towards a bit hot


Top
 Profile  
 
 Post subject: Re: Kingston SSDNOW 300 Case Opening
PostPosted: May 14th, 2018, 3:06 
Offline
User avatar

Joined: September 8th, 2009, 18:21
Posts: 10355
Location: Australia
If the regulator IC is not enabled but is heating up excessively, then ISTM that it must be faulty. This wouldn't account for all the faults, though.

_________________
A backup a day keeps DR away.


Top
 Profile  
 
 Post subject: Re: Kingston SSDNOW 300 Case Opening
PostPosted: May 14th, 2018, 3:06 
Offline

Joined: May 9th, 2018, 14:50
Posts: 22
Location: SSD_Drive
I can't edit the previous post

correction its either the chip below V3 or the BDC (AP3422) chip


Top
 Profile  
 
 Post subject: Re: Kingston SSDNOW 300 Case Opening
PostPosted: May 14th, 2018, 3:11 
Offline

Joined: May 9th, 2018, 14:50
Posts: 22
Location: SSD_Drive
replacing these 2 chips will solve the problem ?


Top
 Profile  
 
 Post subject: Re: Kingston SSDNOW 300 Case Opening
PostPosted: May 14th, 2018, 3:22 
Offline
User avatar

Joined: September 8th, 2009, 18:21
Posts: 10355
Location: Australia
The "BDC" chip is probably the one that is heating up. It is enabled and is driving into a short circuit. Therefore the problem is most likely in the external circuit, not in the chip.

_________________
A backup a day keeps DR away.


Top
 Profile  
 
 Post subject: Re: Kingston SSDNOW 300 Case Opening
PostPosted: May 14th, 2018, 3:30 
Offline

Joined: May 9th, 2018, 14:50
Posts: 22
Location: SSD_Drive
what could it be?

I'm trying to put my hand on equivalent SSD (working one), what should I measure there to compere?


Top
 Profile  
 
 Post subject: Re: Kingston SSDNOW 300 Case Opening
PostPosted: May 14th, 2018, 3:43 
Offline
User avatar

Joined: September 8th, 2009, 18:21
Posts: 10355
Location: Australia
I would always start by measuring the supply voltages (V1 - V4). That should give us an idea what they do and where they go.

_________________
A backup a day keeps DR away.


Top
 Profile  
 
 Post subject: Re: Kingston SSDNOW 300 Case Opening
PostPosted: May 14th, 2018, 4:06 
Offline

Joined: May 9th, 2018, 14:50
Posts: 22
Location: SSD_Drive
OK,

thank you so much, sir

I will update when I have A working one to compare


Top
 Profile  
 
 Post subject: Re: Kingston SSDNOW 300 Case Opening
PostPosted: May 14th, 2018, 18:04 
Offline

Joined: May 9th, 2018, 14:50
Posts: 22
Location: SSD_Drive
I was able to put my hand on an 120GB Kingston, but it has A totally different PCB

but I have found a 60GB which is "almost" identical, will it work to compare measurements?

Attachment:
IMG_3702.JPG
IMG_3702.JPG [ 3.65 MiB | Viewed 1391 times ]


Attachment:
IMG_3703.JPG
IMG_3703.JPG [ 3.71 MiB | Viewed 1391 times ]


Attachment:
IMG_3701.JPG
IMG_3701.JPG [ 3.04 MiB | Viewed 1391 times ]


Attachment:
IMG_3700.JPG
IMG_3700.JPG [ 3.56 MiB | Viewed 1391 times ]


Top
 Profile  
 
 Post subject: Re: Kingston SSDNOW 300 Case Opening
PostPosted: May 14th, 2018, 18:42 
Offline
User avatar

Joined: September 8th, 2009, 18:21
Posts: 10355
Location: Australia
It looks similar -- different ICs but probably similar output voltages. There is one additional regulator on the 60GB version near the screw hole on the flash side.

_________________
A backup a day keeps DR away.


Top
 Profile  
 
 Post subject: Re: Kingston SSDNOW 300 Case Opening
PostPosted: May 14th, 2018, 18:54 
Offline

Joined: May 9th, 2018, 14:50
Posts: 22
Location: SSD_Drive
thank you

what would be the V1 ?


Attachments:
V_1.JPG
V_1.JPG [ 24.84 KiB | Viewed 1362 times ]
Top
 Profile  
 
 Post subject: Re: Kingston SSDNOW 300 Case Opening
PostPosted: May 14th, 2018, 19:39 
Offline

Joined: May 9th, 2018, 14:50
Posts: 22
Location: SSD_Drive
here are the measurements

on 60

5Vin OK
5Vout OK

resistance 5Vin to ground 6.90 "K"ohm (get noting (0L) when measured on 200 ohm)
resistance 5Vou to ground 16.18 "K"ohm (get noting (0L) when measured on 200 ohm)
resistance 5Vin to 5Vout 21.80 "K"ohm (get noting (0L) when measured on 200 ohm)

V1 = 5.02V resistance = 16.21 "K"ohm (get noting (0L) when measured on 200 ohm)
V2 = 2.84V resistance = 5.35 "K"ohm (get noting (0L) when measured on 200 ohm)
V3 = 1.00V resistance = 0.465 "K"ohm (get noting (0L) when measured on 200 ohm)
V4 = 2.85V resistance = 73.30 "K"ohm (get noting (0L) when measured on 200 ohm)



on 240

5Vin OK
5Vout OK

resistance 5Vin to ground 6.58 "K"ohm (get noting (0L) when measured on 200 ohm)
resistance 5Vou to ground 21.60 "K"ohm (get noting (0L) when measured on 200 ohm)
resistance 5Vin to 5Vout 24.27 "K"ohm (get noting (0L) when measured on 200 ohm)

V1 = 0.14V resistance = 0.3 ohm
V2 = 0.00V resistance = 0.3 ohm
V3 = 0.23V resistance = 0.4 ohm
V4 = 0.00V resistance = 0.3 ohm

any thoughts ?


Top
 Profile  
 
 Post subject: Re: Kingston SSDNOW 300 Case Opening
PostPosted: May 14th, 2018, 20:59 
Offline
User avatar

Joined: September 8th, 2009, 18:21
Posts: 10355
Location: Australia
The rule of thumb for switchmode step-down converters is to locate the junction of an inductor and capacitor(s). That's the output voltage test point. Either measure the voltage across the capacitor, or measure the voltage between the inductor and ground.

See http://www.hddoracle.com/viewtopic.php?f=59&t=231#p=16236

Your measurements would suggest that V3 is the Vcore supply for the flash controller. That's bad news. :-(

As for V1, measure the voltage at the 1R5 inductor.

I can't identify the B7CH part, but it appears to be a dual step-down converter made by Monolithic Power. The other ICs are as follows:

MP28258DD, Monolithic Power, 3A, 4.2V - 20V Input, Synchronous Step-down Converter, marking AAA, QFN12:
https://www.monolithicpower.com/pub/media/document/MP28258_r1.14.pdf

RT8010GQW, Richtek, 1.5MHz, 1A, High Efficiency PWM Step-Down DC/DC Converter, 2.5V to 5.5V input, marking ET, adjustable, WDFN-6L:
http://www.richtek.com/assets/product_file/RT8010=RT8010A/DS8010A-10.pdf


Attachments:
MP28258_pinout.gif
MP28258_pinout.gif [ 9.71 KiB | Viewed 1310 times ]
MP28258_app_cct.gif
MP28258_app_cct.gif [ 18.5 KiB | Viewed 1310 times ]
RT8010_app_cct.gif
RT8010_app_cct.gif [ 10.45 KiB | Viewed 1310 times ]
RT8010_pinout.gif
RT8010_pinout.gif [ 6.9 KiB | Viewed 1310 times ]

_________________
A backup a day keeps DR away.
Top
 Profile  
 
 Post subject: Re: Kingston SSDNOW 300 Case Opening
PostPosted: May 14th, 2018, 21:13 
Offline

Joined: May 9th, 2018, 14:50
Posts: 22
Location: SSD_Drive
you think the controller is the culprit ?

1R5 = 1.00V


Top
 Profile  
 
 Post subject: Re: Kingston SSDNOW 300 Case Opening
PostPosted: May 14th, 2018, 21:42 
Offline
User avatar

Joined: September 8th, 2009, 18:21
Posts: 10355
Location: Australia
AFAICT, the 88SS1074 is a dual core controller, so V1 and V3 are probably its Vcore1 and Vcore2 supplies. :-(

The ETH component constitutes a fifth supply, possibly 1.8V.

_________________
A backup a day keeps DR away.


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 61 posts ]  Go to page Previous  1, 2, 3, 4  Next

All times are UTC - 5 hours [ DST ]


Who is online

Users browsing this forum: No registered users and 1 guest


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