Pin shorting.. Lets talk

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Radioman193
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Joined: 16 Aug 2007
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Location: New York

PostPosted: Tue Jul 28, 2009 7:39    Post subject: Reply with quote
You are correct its NOT Vcc

But +3v just the same
Pin#15 is:
VPEN "input"
ERASE / PROGRAM / BLOCK LOKK ENABLE

Fro Erasing array Blocks, Programing data or Configuring Lock-Bits

When Vpen < VpnLnk Mrmory contents cannot be altered.

So as i was thinking this router might be saveable
it was only "Brainwashed" completely.



Here for the full PDF:
http://pdf.qic.com.cn/down/INTEL/40730_E28F128J3A-110.pdf

Cool



untitled2_282.jpg
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pinout of the JS28F320
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untitled2_282.jpg



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tobee
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PostPosted: Tue Jul 28, 2009 8:26    Post subject: Reply with quote
Tbh without pin shorting i would have to buy 3 more asus wl-500w routers.
I'm not sure if its router build quality(heat problems), dd-wrt mega so demanding or both.
Most of those hang ups with no response from router happened after ~40 days uptime.
After unbricking 2 or 3 times I did set reset every 24hours and it works for months non stop without any problems so far.
redhawk0
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PostPosted: Tue Jul 28, 2009 12:51    Post subject: Reply with quote
I don't, and never have, sanctioned pin shorting...but on certain models where JTAG isn't available there are few choices...if Telnet commands or Serial communication is not successful to debrick...pin shorting is your last resort.

There is a "proper" method for pin shorting.

Like Radioman193 said...use a needle...or if you have some dental picks, or electronic picks (we called them "frog-stickers") you can use that too.

Make sure you have a good electrical connection from the needle to the other end of an alligator clip that you will use for ground.

Next...have a friend help you....you need to make your connections to the flash chip WITHOUT power applied...if you attempt to short with power already on, you get sparks...and sparks are BAD.

so...make your connections...and have a friend plug in the wall wart power for you...that is already connected to the router motherboard...don't try to plug in that little barrel connector...it only adds to the likelyhood that your connection will slip off and cause irreversible damage.

So...in a nutshell...this is how to pin short...but again...pin shorting is a LAST resort before the dumpster.

redhawk

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I currently test dd-wrt on Asus, Buffalo, Linksys, and Netgear. Too many to list.

Looking for more test units (newer models) for the project...got a brick?...PM me to make a donation. (USA) A donation is not a debricking service....it is a way to "Give back" to the dd-wrt project.

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barryware
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PostPosted: Tue Jul 28, 2009 13:06    Post subject: Reply with quote
Radioman193 wrote:
You are correct its NOT Vcc

But +3v just the same
Pin#15 is:
VPEN "input"
ERASE / PROGRAM / BLOCK LOKK ENABLE

Fro Erasing array Blocks, Programing data or Configuring Lock-Bits

When Vpen < VpnLnk Mrmory contents cannot be altered.

So as i was thinking this router might be saveable
it was only "Brainwashed" completely.



Here for the full PDF:
http://pdf.qic.com.cn/down/INTEL/40730_E28F128J3A-110.pdf

Cool


The chip in this device is a 48 pin, not a 56. Thanks for the link to the PDF. You can never have too much technical data on hand.. You never know when you will need it.

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redhawk0
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PostPosted: Tue Jul 28, 2009 13:13    Post subject: Reply with quote
Barryware...what is that flash PN...I may have a datasheet for it already...if you don't.

and...Radioman193..thanks for sharing that 56pin link...I'm like barryware...you can never have enough data.

redhawk

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I currently test dd-wrt on Asus, Buffalo, Linksys, and Netgear. Too many to list.

Looking for more test units (newer models) for the project...got a brick?...PM me to make a donation. (USA) A donation is not a debricking service....it is a way to "Give back" to the dd-wrt project.

I do NOT provide personal assistance through chat or phone....so please don't ask.
Murrkf
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Joined: 22 Sep 2008
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PostPosted: Tue Jul 28, 2009 15:17    Post subject: Reply with quote
Yeah...you two really like them data sheets. I think its because you are a couple of real sheet heads.


redhawk0 wrote:
...and have a friend plug in the wall wart power for you...


Wall Wart? What the hecks a wall wart? I have seen this mentioned a couple of times and people talking about the cheap wallwart power supplies....I thought they were referring to Wal Mart and the power supplies you got with WalMart packaged routers were cheap. Seriously!

And when Geetek said in another post about how he wished he hadn't posted that picture because "That's one ugly Wart"...I thought Radioman's hand was in the picture holding his power supply (no offence RM but that's all that made sense to me) but I looked for his hand to see the ugly wart and *I* couldn't see any hand. I mean...it IS something Geetek would say. I thought RM had edited his picture to take his hand out.

Wall Wart?

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greekstile
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PostPosted: Tue Jul 28, 2009 15:19    Post subject: Reply with quote
http://en.wikipedia.org/wiki/Wall_wart
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redhawk0
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PostPosted: Tue Jul 28, 2009 15:25    Post subject: Reply with quote
Laughing :lol:

redhawk

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I currently test dd-wrt on Asus, Buffalo, Linksys, and Netgear. Too many to list.

Looking for more test units (newer models) for the project...got a brick?...PM me to make a donation. (USA) A donation is not a debricking service....it is a way to "Give back" to the dd-wrt project.

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Radioman193
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Joined: 16 Aug 2007
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PostPosted: Wed Jul 29, 2009 1:15    Post subject: Reply with quote
ok this is the Datasheet for the TSOP 48 pin version
from looking at the pdf lit looks like it Might have ben forced to 16M then erased by shorting A19 and WP# or all 3 A19 WP# And Vpp
so the first 16M of the data is "toast".

but from looking up the pins on this end of the flash it "shuld" still be ok. just a "Retard"
it needs "Reteaching" Very Happy

http://www.numonyx.com/Documents/Datasheets/290645_C3_discr.pdf

A19 =high +3v
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48 pin TSOP
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barryware
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PostPosted: Thu Jul 30, 2009 3:39    Post subject: Reply with quote
Fixed... To my surprise, after cleaning up the bridging, it worked. It is on it way back to the owner.

The bridging was caused by "digging" into the pins.. I don't know what the hell the technician was thinking.

Fixed it by reflowing the solder, then used some solder wick (braid). Then used alcohol to clean it up and make it shiny.

Using a magnifying glass, used a razor blade to pass between the pins to make sure (thanks for that tip Redhawk).

It didn't work after the repair. It did need jtag to erase the chip (wholeflash), then flash a cfe. Tftp'd stock fw, then used the gui to load a trailed build.

One thing about this unit (300n v1). With no cfe, the lan lights were not all lit. Only the port I was plugged into. Power light blinking away though.

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Radioman193
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PostPosted: Thu Jul 30, 2009 4:55    Post subject: Reply with quote
barryware wrote:
Fixed... To my surprise, after cleaning up the bridging, it worked. It is on it way back to the owner.

The bridging was caused by "digging" into the pins.. I don't know what the hell the technician was thinking.

Fixed it by reflowing the solder, then used some solder wick (braid). Then used alcohol to clean it up and make it shiny.

Using a magnifying glass, used a razor blade to pass between the pins to make sure (thanks for that tip Redhawk).

It didn't work after the repair. It did need jtag to erase the chip (wholeflash), then flash a cfe. Tftp'd stock fw, then used the gui to load a trailed build.

One thing about this unit (300n v1). With no cfe, the lan lights were not all lit. Only the port I was plugged into. Power light blinking away though.


i was under the impression that the picture was what you saw upon opening the router and you took care of the The bridging that you could see clearly in the photo pins 14 to 19.

sorry
A Real technician would Not have ben pin shorting.

That would be like a Dog lover watching dogs get Butchered alive Thay just could not do it.

it's not Ethical practice and it goes against all that was learned.

To be a Technician is a way of life!
Not just something to "do".

to be a Technician is to be a Technician.
Not just "act" like one when you see fit.

Cool

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Last edited by Radioman193 on Thu Jul 30, 2009 5:58; edited 7 times in total
Murrkf
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PostPosted: Thu Jul 30, 2009 5:17    Post subject: Reply with quote
barryware wrote:
Fixed... To my surprise, after cleaning up the bridging, it worked.


Nuff said.

Real tech wouldn't have pin shorted.

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I'm trying to teach you to fish, not give you a fish. If you just want a fish, wait for a fisherman who hands them out. I'm more of a fishing instructor. So See this:
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redhawk0
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PostPosted: Thu Jul 30, 2009 12:03    Post subject: Reply with quote
Nice work barryware...glad the razor blade trick worked for you too....I've done that many times myself with "donated" units....but still some can't be fixed.

Agreed...Pin shorting is NOT the way to go when JTAG is a viable option.

redhawk

_________________
I currently test dd-wrt on Asus, Buffalo, Linksys, and Netgear. Too many to list.

Looking for more test units (newer models) for the project...got a brick?...PM me to make a donation. (USA) A donation is not a debricking service....it is a way to "Give back" to the dd-wrt project.

I do NOT provide personal assistance through chat or phone....so please don't ask.
barryware
DD-WRT Guru


Joined: 26 Jan 2008
Posts: 12823
Location: Behind The Reset Button

PostPosted: Thu Jul 30, 2009 16:30    Post subject: Reply with quote
Radioman193 wrote:
i was under the impression that the picture was what you saw upon opening the router and you took care of the The bridging that you could see clearly in the photo pins 14 to 19.

sorry
A Real technician would Not have ben pin shorting.


That 1st pic was how I received it.. I used the term "technician" to be nice. I should said "some drunken asswipe with a box opener"

this is how it left.. Sorry my cam isn't real good a macro focus.

@redhawk.. I took the sticker off the flash chip to get to the part number. I don't need a data sheet but now we know what is in a 300v1.

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redhawk0
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PostPosted: Thu Jul 30, 2009 17:09    Post subject: Reply with quote
thanx for the update....nice work.

redhawk

_________________
I currently test dd-wrt on Asus, Buffalo, Linksys, and Netgear. Too many to list.

Looking for more test units (newer models) for the project...got a brick?...PM me to make a donation. (USA) A donation is not a debricking service....it is a way to "Give back" to the dd-wrt project.

I do NOT provide personal assistance through chat or phone....so please don't ask.
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