| reply to buggage
Re: How to recover from a dead 5100/5200 modem. On the begining it goes well just after Load.... i think it's really screw up..... |
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| reply to buggage
I need some info in creating since I'm overseas and can't buy the circuit and to have it shipped
I need the schematic for the using MAX232 and wants to know how I change the 5Volts to 3volts like like to one which the link posted that can get a 3 volt
Thanks |
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1 edit | reply to buggage
Serial connection using Maxim's MAX3232 |
Also I confirm that the same procedure applies to 5400 SOHO DSl Routers. But, it's possible (probably depends on router's part No) to make it operate only as a simple bridge/modem, after applying... |
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 Doctor OldsI Need A Remedy For What's Ailing Me.Premium,VIP
join:2001-04-19
1970 442 W30
kudos:18 | Or use a MAX233A that has built in caps. 
Regards,
Doctor Olds |
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| just used this
Worked Great
i cant believe my modem works again |
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1 edit | reply to del_ahmettt
i can use MAX232N to this circuit??
and recover a speedstream 5200 e270 modens???
i´m noob...
thx  |
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2 edits | kapeton, probably you won't have any problem using it. The only main difference, for the use we want the IC's, is the higher scale of power supply (5V), instead of 3.3~5 V mine. But it isn't a problem, as the other guys have successfully used IC's at this voltage.
The circuit diagram stays the same. |
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2 edits | reply to buggage
Ïh dear friend, it seems you have done everything well, but unfortunately you may be faced with the issue I wrote above
said by del_ahmettt:
... But, it's possible (probably depends on router's part No) to make it operate only as a simple bridge/modem, after applying...
Look at the line, that refers to
NVRAM: 003-3015-INT, SBC Bridge NV'G':59611
I was in the same trouble, some months ago with my SS5400! ;)
See that thread »How to recover from a dead 5100/5200 modem..
I believe that your machine works perfectly as a brigde/modem.
Õïu have to reflash it to work as modem/router, not simply a bridge/modem.
But I have no idea about how exactly you can do it.
I was lucky to have some help from buggage, (oh thanks my friend, everything works ok so far :) ) that send me a file suitable for my model.
Probably, more experienced members can help you.
(Note: I think , we should keep this "How To" clean from additional posts, so we can jump to the referring thread above)
said by kapeton:
and my english is very poor :P
And mine I think, too! |
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 fatnesssubtleJanitor
join:2000-11-17
fishing
kudos:13 | reply to del_ahmettt
(topic move) How to recover from a dead 5100/5200 modem.Moderator Action
The post that was here, and all followups to it, were moved to a new topic .. »other way to access modem. |
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| reply to buggage
Re: How to recover from a dead 5100/5200 modem.
TeraTerm |
I used MAX232N, and... (attach file)
What can I do? |
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Doctor OldsI Need A Remedy For What's Ailing Me.Premium,VIP
join:2001-04-19
1970 442 W30
kudos:18 | Recheck all your connections. Also look for solder making a short between two contact pads. You may have damaged the board or the MAX chip. |
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| Have to aggree with Doctor Olds on this. Make sure you check the connection very carefully. I don't believe the chip or board will be damaged, but something isn't wired properly. When I built my first connection, I was receiving pretty much the same thing - bunch of random characters. Finally tracked the problem down to something not wired up right. Took a while to figure it out, but once I fixed the issue, everything was working fine. You appear to be almost there, so just double check your work, and I think you'll be successfull. |
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Top View | 
Zoom modem | 
Zoom board (top) | 
Zoom board (bottom) | 
Zoom board (lateral) | 
Zoom DB9 | 
To compare the ICs: MAX3232 and MAX232 |
Thanks for the answers.
Well, first they forgive me for my bad English...
I annexed some photos of my project.
I used the project of del_ahmettt for the MAX3232 (16 pins), but I used the MAX232N (16 pins too).
Still it did not works. 
Already I checked everything! What it can be wrong?
It will be that the MAX232N is not appropriate for this? |
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Doctor OldsI Need A Remedy For What's Ailing Me.Premium,VIP
join:2001-04-19
1970 442 W30
kudos:18 | said by alibrenz:It will be that the MAX232N is not appropriate for this? That's not the problem. |
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1 edit | Are you sure your serial communication parameters are OK?
(115,200Bps, 8Bits, No parity, 1 stop, and No flow control)
These "no meaning" characters can appear when bps speed isn't set properly. I can't think something else from those said above  |
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| del_ahmettt 
Are you sure your serial communication parameters are OK?
(115,200Bps, 8Bits, No parity, 1 stop, and No flow control)
Yeah, i'm sure...
:( |
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| reply to buggage
OH YEAH!!! My modem is alive! 
I found my error... It was in the circuit. Instead of connecting pin 4 to pin 5 with a capacitor, I connected (with a capacitor) pin 4 to pin 6!!!! Serious deceit...
After making a power suply stabilized in 5V (because of MAX232), I verified everything again and then I perceived the committed deceit.
After this, everything ok.
P.S.: I used 5V to repair my modem using MAX232N. I don't know if it would function with 3,3V.
Thanks to:
buggage
Doctor Olds
del_ahmettt |
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Doctor OldsI Need A Remedy For What's Ailing Me.Premium,VIP
join:2001-04-19
1970 442 W30
kudos:18 | Congratulations!! |
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| reply to alibrenz
Good job! Had a feeling it would work for you |
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 levI think there is a target on my backPremium,Ex-mod 2002-08
join:2001-05-30
Chicago, IL
kudos:2
 ·AT&T Midwest
1 edit | reply to buggage
Please start new topics At the request of Doctor Olds, and I'm certain with the approval of Buggage, I'm locking this thread. If they ever need to post something of value back in here, I'll be happy to open it up for them.
If you're someone with a problem this thread might help, please start a new thread describing your problem in detail.
Also, please... if you want extended help from members of this site, get a login, and provide as much information as possible in regards to your location and your ISP. Thank you. |
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