This RGB-Pi Jamma adapter with raspberry pi 3+ was completely dead. There's a helpful repair wiki that suggested it was most likely one or both of the I/O controller chips MCP23017 causing the issue.
This is because when the adapter is plugged in upside down it sends 12v where 12v should not be and frys the chips. Checking with a multi meter player 2 button 2 was reading open.
I had to order the very tiny chips from mouser and wait a week for them to arrive.
The Pi faces down, so no wonder these get plugged in upside down.
Bad chip removed and new one fitted.
I had to dust off the hot air station for this repair as the chip has a ground pad on the bottom of it, making it impossible to remove with just a soldering iron.
Repair complete.
No comments:
Post a Comment