Soldered a WAN port for a WLI-TX4-G54HP, but doesn't work

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LOM
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PostPosted: Wed Sep 29, 2010 1:30    Post subject: Reply with quote
feliciano wrote:


Note: I still appreciate any help on the hardware mod issue.


Do you have the resistors R148,149, and 150 in your router?
It is hard to see in your pic but it doesn't look to be something black coloured between their connection points, looks like the green pcb colour there.

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feliciano
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PostPosted: Wed Sep 29, 2010 4:04    Post subject: Reply with quote
Thanks, LOM, for your reply.

Quote:
Do you have the resistors R148,149, and 150 in your router?

No, I don't have that resistors, but the original WHR-HP-G54 doesn't have it either, as I can tell from the picture at the wiki (http://www.dd-wrt.com/wiki/index.php/Inside_the_WHR-HP-G54). But the Asian modified WHR-HP-G54 does it have them. Weird, isn't it?

For quick comparison, I made a collage of the areas of interest.

And there's another tought rounding my mind: why the manufacter would put a magnetic coupler, chips, etc, and then save cents on a couple of capacitors, or perhaps, a resistors? should they be really needed?



comparison.jpg
 Description:
Original WHR-HP-G54, my WLI project at center, and another modified WLI at rightmost.
 Filesize:  263.42 KB
 Viewed:  2996 Time(s)

comparison.jpg



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Worked with: WR850Gv2, WHR-HP-G54, WRT54 G/GL/GS, f5d7231-4p, wl-520gU, WRT150N, DIR-400A1, DIR-600B1, WLI-TX4-G54HP, WHR-HP-GN, F7D3301/FD7301, F7D3302/F7D7302, WNR3500Lv2, e1000
LOM
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Joined: 28 Dec 2008
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PostPosted: Wed Sep 29, 2010 4:30    Post subject: Reply with quote
feliciano wrote:

No, I don't have that resistors, but the original WHR-HP-G54 doesn't have it either, as I can tell from the picture at the wiki (http://www.dd-wrt.com/wiki/index.php/Inside_the_WHR-HP-G54). But the Asian modified WHR-HP-G54 does it have them. Weird, isn't it?



Well, my eyes are old but looking at the dd-wrt picture in its original size (Eko's link, not your reduced size pic) I would say that the colour between the resistors soldering points is black and not pcb dark green.
Those resistors has been there for the magnetic coupler in all other routers I have seen and they are there also in the asian mod.
They are there for your lan ports so you can measure the resistance on those if you want to know the value.

They are needed or there wouldn't be a center tap in the magnetic couplers coil.

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Dark_Shadow
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PostPosted: Wed Sep 29, 2010 8:59    Post subject: Reply with quote
LOM wrote:
Well, my eyes are old
Your eyes are not that old R148, R149, R150, FIL21, C240, and C2423 are all missing in the modified one.
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feliciano
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Location: Latin America

PostPosted: Wed Sep 29, 2010 10:57    Post subject: Reply with quote
So my eyes are getting old.

Carlos Gardel sang "twenty years are nothing", what the heck he was talking about? (obviously no about the sight) Laughing

I would take LOM advise and add equivalent resistors to what I have on the LAN ports and try one more time. Thanks all again.

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Worked with: WR850Gv2, WHR-HP-G54, WRT54 G/GL/GS, f5d7231-4p, wl-520gU, WRT150N, DIR-400A1, DIR-600B1, WLI-TX4-G54HP, WHR-HP-GN, F7D3301/FD7301, F7D3302/F7D7302, WNR3500Lv2, e1000
feliciano
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Joined: 24 Oct 2008
Posts: 922
Location: Latin America

PostPosted: Wed Sep 29, 2010 21:30    Post subject: Reply with quote
For the guys following this thread:
Soldered R148, R149, R150, and C243. Still doesn't detect anything attached to this port. Sad
(Me and the girl at the electronics store weren't able to figure out what is FIL21 and C240.)

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Worked with: WR850Gv2, WHR-HP-G54, WRT54 G/GL/GS, f5d7231-4p, wl-520gU, WRT150N, DIR-400A1, DIR-600B1, WLI-TX4-G54HP, WHR-HP-GN, F7D3301/FD7301, F7D3302/F7D7302, WNR3500Lv2, e1000
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