pg module led

Only your green led light is not working? Could you give more details, please?

Hello Tseong,

Could you please provide more information. Under what cirumstance is the led ligh on and then off? Was it initially working, and now after some time it has stopped working? PG Module acts as a handshake between the SOM and the Carrier indicating that the SOM is being powered properly by the Carrier Card.

So with that being said, check and make sure your SOM is properly connected to you carrier card. Then check and make sure your 12V AC/DC adapter is plugged in propperly(perhaps try a different wall AC port as well). Also does the "FPGA DONE" led light up?  

Next you can double check you have your Carrier Card setup properly. We have the setup documented on Page 15 of the "Tutorial 02 First Application - Hello World" reference design. You can find it at http://zedboard.org/support/design/13076/106

--Josh

answer, thank you. 

but, i have board basic setting complete.

i problem situation, i used to oscilloscope in 'con1' connector. 

The reason for using the connector is to check the data and clock.

at any moment vin led ligth is on. other light leds is off.

please detailed answer. thank you.

Hello Tseong,

I am still a bit confused. So did you populate the con1 connector with an FMC that you are using to monitor the data and clock?

Also is your board new strait out of the box and you are having this issue? Or have you been using your board for a while and now the pg_module led is not lit?

Just to double check, you also have your PicoZed SOM connected to your carrier card correct?

--Josh

umm... I used it with the boards in combination.

The board was used for about a month. and

I am sure that it is SPI communication ->  Con1 connector was used.

I was using a board and four led lights on. -> pg module, vin, fpga done, picozed of 'D1'

but i was using to osilloscope in  Con1 connector. Suddenly only one light vin led is on.

thank you. Josh. 

Hello Tseong,

Could you provide me with which version of PicoZed FMC Carrier Card V1 you are using. You can find the version on the back of your carrier card printed in the silk screen. Here is an example of what to look for : MBCC-PZCC-PCB-C

If your PicoZed FMC Carrier Card V1 that you are using is the same revision as above(Rev C), you should look at the PicoZed FMC Carrier Card V1 errata.

You can locate it at : http://zedboard.org/support/documentation/4701

If you go to section 4.6 in the  "PicoZed FMC Carier Card Rev C Errata" document, it explains an issue with the Carrier Card when an FMC module that requires 3 amps on the 3.3V rail is plugged into the PicoZed FMC Carrier Card V1. This would explain the power isses you are experiencing with the SOM.

The Errata also provides a workaround to this issue.

--Josh

Hello Tseong,

Does your picozed 7020 SOM+FMC Carrier v1 power up properly when you have nothing plugged into CON1?(pg module led on)

If the pg module led does not light up when power on your board with no FMC Module attached, then you most likely have damaged some different aspect of your board due to the device not going into overcurrent protection before somthing was damaged. 

To answer your question "Will the board survive by replacing the inductor?"

If you are unable to power up the board with the FMC disconnected, there is a chance somthing is shorted/damaged on the 3.3V rail. Inductors don't typically get "damaged" so if it won't power up without that FMC load, then you most likely have a different issue.

--Josh

Hello Josh.

Does your picozed 7020 SOM+FMC Carrier v1 power up properly when you have nothing plugged into CON1?(pg module led on)

--> Pg module is not on. And the test proceeded to the oscilloscope course with nothing connected to con1.

To answer your question "Will the board survive by replacing the inductor?"

-->The inductor replacement did not proceed because there was no replacement part. Sorry.

Can you guess the problem with your thoughts?

I'm sorry I asked a lot. Thank you very much.

Hello Tseong,

Unfortunaly I can't make a guess as to which component may be damaged. 

To narrows things down you could power up the board and then check each voltage rail to see which are / are not comming up. You also need to keep an eye on the input supply, if somthing did short it would be drawing a lot of current (1+ Amps at 5 Volts) and somthing would be very hot. Being able to monitor that input current would mean that you are using a bench supply which you may or may not have.

Another option would be sending it to a failure analysis / repair service, however we do not offer nor do we recommend any.

The next option (perhpas the best option) would be to purchase another Carrier Card. However this time I would suggest you choose the PicoZed FMC Carrier Card V2 due to it not having any of the issues that the Carrier Card V1 had. The reason I believe this to be the best option is due to the time and/or potential cost it will take to repair you board.

http://zedboard.org/product/picozed-fmc-carrier-card-v2

--Josh