|Re: Very elegant causes|
Message #6 Posted by Vieira, Luiz C. (Brazil) on 3 July 2003, 6:37 p.m.,
in response to message #3 by Mike
Hi, Mike; thank you for your comments.
No offense but these are very elegant causes.
Iím not offended. (is the term "elegant" offensive somehow?)
It still amazes me that people always look for the more exotic causes before looking for the more simple causes. It's a Engineer thing, I guess.
Iím an electrical engineer, and Iím not offended at all.
In all the readers that I have ever repaired, I have never found any of these possible causes, to be the cause of any reader problem that I've tried to fix. Doesn't mean it's not possible but I've not seen them and I've repaired over 100 readers.
Iíve repaired three myself and helped others to repair I-donít-know-how-many; youíre experienced, thatís good.
The most likely causes of dirty head (...)
I assume, maybe wrongly, that if someone has already opened the reader, removed the gunk, replaced the gummy wheel for O-rings or fuel tubes and tested it, then the head has probably been cleaned. If the card causes CARD ERR message when reading, I ask him to clean the head.
(...) or bad cap (...)
I knew that bad caps could cause problems in card readers after reading some posts in here.
(...) or misadjusted eccentric isn't even mentioned.
As I mentioned in another post, I used to think the exocentric was not to be touched. Anyway, as we have O-rings and fuel tubes, adjusting pressure is necessary. Also, I believe measuring current drain when pulling cards is an important reference to adjust the eccentric, do you agree?
Malfunction simply means the reader thinks the hardware is broken.
This I did not understand. I used to take [MALFUNCTION], maybe wrongly (again), as generated by the firmware when the reader as a hole was not working properly.
Thank you, Mike; thoughtful and reasoning considerations are always welcome. I did not write this post till now because I did not have the time to elaborate the text.
Edited: 3 July 2003, 9:47 p.m.