Not sure if any one will be able to help and not really expecting much but it's worth a shot.
Have an old robox RBX01 that not working - for disclosure it came to me in a non working condition with no history or info.
On the main board there is a chip marked:
027 45UCG in position U5 on the board has anyone any idea what this is? there seems to be 4 in total all the same. U5, U8 ,U11 , U14
<img src=" removed link " />
Just trying to get a handle on the layout , components etc as there seems to be an issue with some signals at the head.
Namely the ic2 clock line does not seem to be working while it's signal is visible and recognisable on a cheap scope its peak to peak is only a couple of millivolts around 3.3v and so does not go low enough for the eeprom to recognise as being low. (The pin also seems to share continuity with the 3.3v power line which I am pretty sure is wrong)
The ic2 data line however does appears correctly on the scope
Not sure if there is a publicly available schematic or if someone knows what that chip is.
p.s sorry for edits image of chip keeps getting removed
Posted : 11th April 2021 2:18 pm