pin mismatch when measuring voltages on MBHP CORE

Testing/Troubleshooting
1

Hi everyone,

After soldering the CORE, I did the voltage measuring and got some pin mismatches…

The pins on the optocoupler socket(5&8) give 5,03 V = OK

Pins 1&12-11&12-32&11 on the PIC socket give 0V = not OK

Pins 1&10-10&11 on the PIC socket give 5,03V = ???

What could have gone wrong with the soldering ?  Any troubleshooting surely appreciated.

Greetz,

Kayzer

2

Hi Kayzer,

did you plug the 5 jumpers into the programming port J3? Otherwise the power pins of the PIC are not supplied.

Best Regards, Thorsten.

3

Hi Thorsten,

The 5 jumpers are perfectly plugged in. It must be some soldering flaw I think…

4

OK I checked all the soldering and it does look good…

Could anyone point me in the right direction for solving this  ???

5

The error must be between the programming port J3 and the PIC power lines. You could follow the tracks based on the schematic, this will be easier: http://www.ucapps.de/mbhp/mbhp_core.pdf

Best Regards, Thorsten.

6

Well, I resoldered the J3 port and everything measures fine now !

;D ;D ;D

Thorsten, thank you for pointing me in the right direction.

Greetz,

Kayzer