Thursday, November 23rd 2017, 9:20pm UTC+1

You are not logged in.

  • Login
  • Register

Dear visitor, welcome to NAS Forum. If this is your first visit here, please read the Help. It explains how this page works. You must be registered before you can use all the page's features. Please use the registration form, to register here or read more information about the registration process. If you are already registered, please login here.

1

Tuesday, January 18th 2011, 12:22am

35HD-DUAL-NAS - D5TD Component Identification

Hi All,


Got a blown component and a 35Dual nas (sata) board. There are several on the board and one is burnt out. Although unit seems to be functioning ok I'm trying to locate and replace it.

A schematic would be handy if available, I've searched everywhere and can't find any information.

The part is not hard to miss it has 6 pins and number is D5TD and 1c.

Any info would be appreciated


Thx
Carl

HWguru

NAS2000-Team

Posts: 1,001

Location: Wien

2

Tuesday, January 18th 2011, 7:16am

Hello Carl,
there is no schematic available.

But I know a lot of the components on the board.
Provide us a photo of the blown component and the parts surrounding it.

I have a dead mainboard here and looked at the component marking.
There are D5TD parts on my board, too. These are MOSFET transistors.
They seem to switch the power supplied to the disks.

Regards,
HWguru

P.S. I extended the thread title and removed some of the man blank lines in the post
Leute ohne Laster haben oft wenige Tugenden...
NAS2000 2.3.2.IB.2.RS.1+Lüfterabschaltung+SSH+do_it+zusätzliche commandline tools+changed root password
1. suchen - lesen - Google - lesen - 1. Fragen gehören ins Forum, dann profitieren alle davon!

3

Wednesday, January 19th 2011, 12:12am

[attach]260[/attach]

Hi HWguru,

Taken a awhile to get photo small enough off my phone to post it so here it is.

Thanks

Carl

4

Thursday, January 20th 2011, 12:18am

Hi HWguru,

Do you happen to know what the specification on the transistor may be? I've searched that code and got no results. I've found lots of 6pin Mosfet Transistors on Farnell but have know Idea which may be compatable.

Thx Again


Carl

HWguru

NAS2000-Team

Posts: 1,001

Location: Wien

5

Thursday, January 20th 2011, 9:30am

Hi,
I tried to find some specification on the Internet, too - nothing...

There is one Fet for each disk and 5V and 12V Power supply.
.
On my board I made a simple test and connected a resistor instead of the disk.
Then I measured how much the voltage drops at the transistor.

Source code

1
2
3
4
5
6
Voltage       = 12.05 V
Load resistor = 11 Ohm
--> Current   = 1.1 A
Voltage Drop  = 40 mV

Result R=U/I  = 36.5 mOhm


So this part [attach]261[/attach] is a P-Channel Mosfet with a typical Rdson of about 40mOhm

Any P-Ch Mosfet with this package (SOT23-6), a similar Rdson, max. Vds and Vgs of 20V or more could be used.

A part matching would be the Toshiba TPC6108

For a temporary repair you could remove the blown one and connect the two 12V (yellow) wires of the hdd power cables.
Or you short the S-D solder pads.

Regards,
HWguru
Leute ohne Laster haben oft wenige Tugenden...
NAS2000 2.3.2.IB.2.RS.1+Lüfterabschaltung+SSH+do_it+zusätzliche commandline tools+changed root password
1. suchen - lesen - Google - lesen - 1. Fragen gehören ins Forum, dann profitieren alle davon!

Similar threads