CCS/LAUNCHXL-F28379D: 3V3 pin shorted to GND

sms sms

Part Number: LAUNCHXL-F28379D
Other Parts Discussed in Thread: TMS320F28379D

Tool/software: Code Composer Studio

Hi all,

In during working on launchpad 3V3 pin shorted to GND.How to repair my launchpad ? (when connected launchpad to USB , the launchpad not working.)

the polyswitch F1 is well.

Please help me. I working on the project and need to this launchpad.

Tkank you for helping to me.

over 5 years ago

0 Kevin Allen18 over 5 years ago

TI__Mastermind 45046 points

Hi sms,

sms sms said:
In during working on launchpad 3V3 pin shorted to GND.

If 3V3 and GND have been shorted there are likely parts on the board that are damaged. You'll need to debug the board, find what parts are damaged, and replace them. Or purchase a new LaunchPad.

If you're going to debug the board, I'd suggest removing JP1, JP2, and JP3 first to isolate the JTAG emulator from the rest of the board. Then you'll need to locate the parts that are bad on either side of the board, JTAG or DUT side. This could be a lengthy process depending on what's damaged. Could perform a visual check, touch check for components that are hot (be careful of ESD), check parts with multi / LCR meter, etc.

Best,

Kevin

0 sms sms over 5 years ago in reply to Kevin Allen18

Intellectual 550 points

Thank you for response .

Now remove JP1,JP2 and JP3 then connected board to laptop and detected by laptop.(but before this not detected.)

now check side of JTAG emulator or another side? Which part should I check ? which part probably damaged ?

and I don't know meaning of ESD? please explain more.

NOTE:

before removing JP1,JP2 and JP3 the board not detect with laptop and when connected it to USB the TMS320F28379D and some of part are hot.But after removing JP1,JP2 and JP3 the board detect by laptop and led of side of JTAG turned on.(before not this happen .)

0 Kevin Allen18 over 5 years ago in reply to sms sms

TI__Mastermind 45046 points

Hi sms,

sms sms said:
before removing JP1,JP2 and JP3 the board not detect with laptop and when connected it to USB the TMS320F28379D and some of part are hot.But after removing JP1,JP2 and JP3 the board detect by laptop and led of side of JTAG turned on.(before not this happen .)

This means that the issue is not on the JTAG side, but on the DUT (device under test) side, so you can focus your efforts there. I can't say which part is damaged, you'll have to debug the DUT side and its components further.

ESD is Electrostatic Discharge which can damage PCBs and the devices on them if they are not handled properly.

Best,

Kevin

0 sms sms over 5 years ago in reply to Kevin Allen18

Intellectual 550 points

Thank you very much.

How to know that the TMS320F28379D damaged??

Best for you.

0 Kevin Allen18 over 5 years ago in reply to sms sms

TI__Mastermind 45046 points

Hi sms,

If the F28379D device is getting hot to the touch and drawing a lot of current than it's likely damaged. If this is the case, purchasing a new LaunchPad altogether is the simplest thing to do.

Best,

Kevin

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CCS/LAUNCHXL-F28379D: 3V3 pin shorted to GND