[labnetwork] Troubleshooting Help

[Prashant Srinivasan]

Hi Joey,

Are you sure it is the USB to Serial converter that is the issue? These 
are pretty robust (especially the FTDI and Silicon Labs CP2102N based 
ones). Can you post the error log? Do you know if the COM port got 
reassigned somehow or if some other program is holding the port open? If 
possible, disable USB power save in the BIOS or in Windows. What does 
device manager say?

Prashant

On 7/6/2026 9:21 AM, Joey Vo wrote:
>
> Hi Labnetwork,
>
> My name is Joey Vo and I am a staff with the USC Nanofabrication lab. 
> I hope I am writing to the right place. I would like to post an issue 
> I am having with a SUSS MABA6 Mask Aligner to see if anyone on the 
> forum has a solution.
>
> The issue is with the LED Lamphouse Communication. We have verified 
> the Driver Boards and LED Lamphouse & Fans are operational and suspect 
> the issue may be an issue with the USB to RS-485 converter. We are 
> waiting for a new converter to be delivered but would like to check 
> for other possible solutions in the meantime.
>
> Thank you,
>
> *Joey Vo*
>
> Lab Operation Engineer
>
> USC John O'Brien Nanofabrication Laboratory
>
> Michelson Hall, 1002 Childs Way,
>
> Los Angeles, CA 90089 | Room LL102 C
>
> 213-740-8914
>
>
> _______________________________________________
> labnetwork mailing list
> labnetwork at mtl.mit.edu
> https://mtl.mit.edu/mailman/listinfo.cgi/labnetwork

-- 
Prashant Srinivasan
Teaching Cleanroom Engineer
Electrical & Computer Engineering
Univ. of California Santa Barbara
https://www.ece.ucsb.edu/department-resources/electronics-shop/tcr
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://mtl.mit.edu/pipermail/labnetwork/attachments/20260706/9067364f/attachment.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image001.png
Type: image/png
Size: 639192 bytes
Desc: not available
URL: <https://mtl.mit.edu/pipermail/labnetwork/attachments/20260706/9067364f/attachment.png>