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Overload protection
Posted: Wed Oct 05, 2022 1:56 pm
by verkkotalo
What happened to the device? Is this a warranty case? Yesterday the same chip read normally, but today these problems. I use a clips.
Test done without a chip
Re: Overload protection
Posted: Wed Oct 05, 2022 2:21 pm
by verkkotalo
Doesn't read and write correctly
Re: Overload protection
Posted: Thu Oct 06, 2022 11:06 am
by ArT
Protection buffers are damaged. This type of damage is not a warranty case, because buffers protects from wrong connection and short circuit. When you program in external circuit with clip, programmer can not limit external current and in case of wrong connection all high current is going through buffers and they can be damaged and need replacement. Pleace check similar case here:
viewtopic.php?f=22&t=401&p=2002&hilit=%2Acb3q%2A#p2002You can replace it for your own (details in above topic) or you can send programmer to our service - in such case please contact with me via PM for details.
Re: Overload protection
Posted: Thu Oct 06, 2022 11:58 am
by verkkotalo
Do I need to change all SN74CB3Q3245PWR or is it enough to change only one?
Re: Overload protection
Posted: Thu Oct 06, 2022 5:44 pm
by ArT
You should replace all 4 at once because it may not work properly if you replace only one (even if hardware test pass after repair). Buffer for 25xx devices is second (2 from 4) counting from processor side, if you are programming only 25xx devices you do not have to solder 1st, 3rd and 4th but old buffers should be removed.