Electronics > Repair

[FIXED] Venerable AIM TTI PL303QMD-P needs help - Overvoltage trip error

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Zucca:
Okay, the problem is in one the digital PIC board (originally master).
Swapped the two and the error follows the PIC board, the other side was fixed.

Two corrections from before:
1) the misaligned molex (on the master power board) does not play a role... it is correct in both position misaligned or not..
2) the two power boards are identical but there is a hard jumper in the master (LK1)... so for basic tests you can swap them temporarily but them put them back in place.

getting closer!

Zucca:
Sorry for the delay, I am selling some stuff (go to the buy/sell section to check it out) and my 2015 Ford F150 needed some immediate attention.

Will resume this adventure soon, I am confident I will fix it.

Zucca:
uP board has some digital and analog stuff.

As a quick check the analog parts looks good.
Next I will check the DAC and ADC with a scope.

Can't be the uP because the display "Output trip" is sent by the uP iself.

Gertjan:
Hi Zucca, good to hear that you are still at it!  :-+
This very nice power supply needs to be in use on your bench, instead of sitting in your repair que  :)

m k:
On the bench already.

MCU can have separated on/off info pins for both channels.

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