FW: [Soekris] Soekris 4521 reboots

Michael DeMan michael at staff.openaccess.org
Mon Jul 29 15:20:05 UTC 2002


Is there a serial number range or other way that we can check our current
4521 units to see if they are subject to this problem.
- mike

Michael F. DeMan
Director of Technology
OpenAccess Internet Services
1305 11th St., 3rd Floor
Bellingham, WA 98225
Tel 360-647-0785 x204
Fax 360-738-9785
michael at staff.openaccess.org



------ Forwarded Message
> From: Soren Kristensen <soren at soekris.com>
> Organization: Soekris Engineering
> Date: Mon, 29 Jul 2002 16:26:11 +0200
> To: jim at terwee.com
> Cc: soekris-tech at lists.soekris.com
> Subject: Re: [Soekris] Soekris 4521 reboots
> 
> Hi Jim & List,
> 
> Jim TerWee wrote:
>> 
>> I also have the problem with Mikrotik aka Senao cards also doing random
>> reboots. I also tested with a 30 mw Prism card, 100mw Aironet amd a Lucent
>> Card which works flawlessly. With the 200 mw card as long as I don't load
>> the card its fine as soon as pull bandwidth the 4521 will randomly reboot I
>> have never made it more then 7 minutes. So I would guess that the hostap
>> driver is not to blame. I noticed another poster Jim Thompson also sells
>> these cards maybe he has a fix as these are identical to his.
>> 
> 
> There is an issue with a new power supply circuit on the latest net4521
> production series, having problems with large transient current draw on
> the 3.3V power line. If that 200mW card is a 3.3V card, then that power
> supply issue is probably causing your problem.
> 
> Anybody experiencing that problem problem can return the net4521 for
> modification.
> 
> If you fell like it and have a soldering iron, you can also do the
> modification yourself:
> 
> Replace the resistor R76 with a 39Kohm 5% 0603 size resistor. R76 is
> located next to U6 in the corner with the three tall electrolytic
> capacitors.
> 
> 
> Best Regards,
> 
> 
> Soren Kristensen
> 
> Soekris Engineering
> 19185 Taylor Avenue
> Morgan Hill, CA 95037-2714
> 
> Phone (408)782-2307, Fax (408)782-2317
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> 

------ End of Forwarded Message




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