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For English speaking users => Recovery USB Flash Drive => Тема начата: juan503 от 03 Июля 2010, 00:32:02

Название: power issue
Отправлено: juan503 от 03 Июля 2010, 00:32:02
i have a 4GB silicon power ???
this isnt work (i plug it in and nothing happened)
i like know how can i fix this problem(capacitors failor or etc)
see these pic and help me please.
http://pic.ms/v2/images/206_sp2.jpg
http://pic.ms/v2/images/805_sp1.jpg
Название: Re: power issue
Отправлено: _ANDY_ от 03 Июля 2010, 10:32:21
First check the resistor R1 1.5 Ohm.
Then on datasheet u should check basic voltage 5v / 3,3 v / 1,8 v on the pin of the controller.
Datasheet need to search. I have no for this controller.
Название: Re: power issue
Отправлено: Ksanderash от 03 Июля 2010, 13:39:39
juan503
ANDY is, as usual, right  8)

I believe PS2251-33 pin-out (http://www.flashboot.ru/Files-file-400.html) will do for 2251-50 too. Check that main 5V supplying pin with your DMM:

(http://img693.imageshack.us/img693/7804/ps225133.th.png) (http://img693.imageshack.us/i/ps225133.png/)
Название: Re: power issue
Отправлено: juan503 от 03 Июля 2010, 16:03:47
hi again
-i was put dmm on 20K-show 7.02
-no voltage in vcc5
whats de mather?
do you have book or anything to understand power and electronic :D
Название: Re: power issue
Отправлено: Ksanderash от 03 Июля 2010, 16:32:38
Hi there. You don't need books here  :) That resistor had 1.5Ohm value before it had burnt (7kOhm now, right?) And 1.5 it's almost "zero" resistance. So you can short R1' terminals with a thin wire, and then plug in the flash into USB port.

p.s. For a quick test such solution will do, but for a long term operation you have to solder in there a real 1-2Ohm SMD(surface mount device) resistor.
Название: Re: power issue
Отправлено: _ANDY_ от 03 Июля 2010, 16:42:40
http://en.wikipedia.org/wiki/Resistor
http://en.wikipedia.org/wiki/Capacitor
http://en.wikipedia.org/wiki/Electronic_circuits
Название: Re: power issue
Отправлено: juan503 от 08 Июля 2010, 23:36:39
hi-thanku for reply :)
how about warming up controller when it's connected?
Название: Re: power issue
Отправлено: Ksanderash от 21 Июля 2010, 00:47:49
Doesn't sound good  :-\

Apropos, any signs of life when connected?
Название: Re: power issue
Отправлено: juan503 от 22 Июля 2010, 23:02:28
 :-\ hi-no sign of life-just controller going warm
Название: Re: power issue
Отправлено: Ksanderash от 25 Июля 2010, 01:10:14
Well... I'm pretty sure more than half that it is gone  :-\

That's why the R1 has burnt.