U6 power supply problem...
Posted 27 March 2013 - 08:29 AM
Posted 27 March 2013 - 08:36 AM
Posted 27 March 2013 - 10:37 AM
If you want to try some troubleshooting yourself, start by using a DMM to measure the resistance from VS to GND with nothing connected to the U6 except for the DMM. It should be 100s of kohms, but on a damaged unit is often just a few ohms. You then remove things 1 at a time until the resistance jumps up to normal.
I don't have a schematic in front of me at the moment, but the typical progression is to first remove U16. It is a protection chip and the U6 will operate without it. Then you could one at a time try D19 (near USB), D7 (near AIN2), D8 (next to DB15), and D9 (near yellow LED). Sounds like you might also remove U21.
I suggest you continue these details through email with [email protected], rather than here on the forum.
Ok, thanks, i will to try this.
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