If you have a missing or damanged component on your Proffieboard,
this page will help you identify it and what you can do about it.
If you have a hot-air soldering station, most of these components
are relatively to easy to replace, just look up the component you
need in the BOM.
R5
Serves two functions: It protect the board from battery power, and
also limits how much current the blade pixels can leech from the
board when they are supposed to be off.
Can be replaced with a bridge, but the board will be vulnerable unless
there is an external resistor somewhere. Note that if you have a pogo pin
connector, the resistor should be between the board and the pogo pins, having
one in the blade is not sufficient to protect the board.
L2
Filters out noise on the power provided to the CPU
In most cases, this can be replaced with a bridge. The extra
noise is still unlikely to cause problems for the CPU.
Q1-Q6
Controls the power to the LEDs or Pixels
There are six of these, and if some of them are not used, these become your
spares if one of these breaks. So if you short your blade and Q2/Q3 fries, just
hook up your blade to LED4/5 instead and update your configuration accordingly.
D61
Prevents current flow to the battery when on USB
Sometimes, this breaks down in an odd way, where the board will work just fine
IF you plug it in to USB to boot it up. While the board can potentially operate
if this is replaced with a bridge, it's not safe to do so, and the component must
be replaced to make the board work again.
RN4
Protects the USB and CPU from each other
Can potentially be replaced with two bridges, but the board will be more
vulnerable to electrical spikes over the USB connection. Also, if you bridge
the pads, make sure to bridge them the right way, or USB communications will not work.
SW1
BOOT button
The board will work just fine without it, until you end up with a bad programming and need
to press it. If you remove the button completely, you can short the pads with a paperclip or
tweezers when you need to push it.
SW2
RESET button
The board will work fine without it. If it's not working, you can short the reset pad to GND instead.
Also, if your goal is to put the board in bootloader mode, you can hold BOOT while providing power to
the board instead of holding BOOT while pressing reset.
C61
Battery power noise filter
This capacitor helps filter out incoming noise and helps the 3.3v regulator work
properly. It's entirely possible that the board will work without it, especially
if you don't have anything extra drawing power from the 3.3v pad.
This page has been accessed 3,123 times since
July
3rd,
2020.
Last modified:
July
4th,
2020
- Design by
Monica &
FredrikHübinette
