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Topic: TP-Link TL-WR941ND memory upgrade (64MB)

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Memory mod done smile I bought PC3200 DDR memory with H5DU5162ETR 64MB (32Mx16bit) chips and soldered one of them into my WR941ND router. No software changes needed - it just boot up with 64MB memory onboard:

http://i057.radikal.ru/1102/cd/72f6fb11e494.jpg

http://i013.radikal.ru/1102/8f/dd89339b5924.jpg

I used (Rose alloy), Amtech RMA-223 flux and simple 40 vatts soldering iron to desolder chip.

root@RegHome:/# free
              total         used         free       shared      buffers
  Mem:        62112        23004        39108            0         1304
 Swap:       586268            0       586268
Total:       648380        23004       625376

(Last edited by regressor on 4 Feb 2011, 06:19)

Greetings, that's really cool.
I simply can't imagine to solder/disolder a SMD installed chip with a conventional soldering iron, seems so tricky.

I have a serial port headers soldered on mine, but never think I can solder something like this on the board without breaking some of the other elements on the PCB.

This is easy. Just train using broken hardware. smile

The trick is to use "rose" alloy to desolder chip (look at desoldered memory chip on first photo). It lower junctions melting point to ~120C - so you can't overheat chip and pcb pads (you can remove chip from pcb by your fingers).

To solder just use good flux and temperature regulated soldering iron with clean sharp tip.

Here is the video: http://www.youtube.com/watch?v=7kyaz4Zrd78

Thank you for sharing. Just repeated the 64MB memory mod. Used desolder technology you mention.

Donor is PC2700 DDR333 512MB SODIMM:
http://s006.radikal.ru/i213/1106/e3/01e4ee04a931.jpg

desoldered:
http://s43.radikal.ru/i102/1106/e5/c1a9865925c3.jpg

soldered to TP-Link TL-WR941ND:
http://s009.radikal.ru/i308/1106/54/96cf97fba270.jpg

Few pads was broken, but they was NC pins (Not Connect).

Result:

Serial port view:

U-Boot 1.1.4 (Jul 17 2010 - 00:26:05)

AP81 (ar7100) U-boot
DRAM:
sri
64 MB
id read 0x100000ff
flash size 8MB, sector count = 128
Flash:  8 MB
Using default environment

SSH:

root@OpenWrt:~# free
              total         used         free       shared      buffers
  Mem:        62112        25392        36720            0         1668
 Swap:            0            0            0
Total:        62112        25392        36720

(Last edited by densky on 6 Jun 2011, 04:31)

Which version you've got?
Is it possible to make hardmod of my wr941nd v3 (I mean, replace 4M stock flash)?
Thank you

(Last edited by manki on 9 Nov 2011, 22:08)

this is not about flash upgrade. search the forum, there are several tutorials about it. but it's not that easy, you need to figure out a way to program the flash before using it the first time.

I found that it shows 8M but real capacity is just 4M. I thought that there is hardware mod.
Thanks

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