(Topic ID: 321893)

WPC95 MPU cause flipper stuck on

By Pesmerga

1 year ago


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  • 12 posts
  • 4 Pinsiders participating
  • Latest reply 1 year ago by Pesmerga
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#4 1 year ago

Fuse F115 on the powerdriver

#6 1 year ago

When switches F2 and F6 appear active even when J212 is disconnected, start with a check on U25.
If U25 pin 1 and pin 14 are LOW without J212, then something is wrong here.
Check 5V and pull-up resistors around U25
u25 (resized).pngu25 (resized).png

#9 1 year ago
Quoted from Pesmerga:

where should i hook the probe

You can use C31 to hook up the probe. Left leg= (+5V), right = GND
Then with the probe on U25-1 and -14.

#11 1 year ago
Quoted from Pesmerga:

Resistors r111 and r113 are both low

When resistors R111 & R113 are LOW on both sides, they are not connected to the 5V. (damaged trace ?)
When they are LOW on one side and HIGH on other, U25 is most likely the culprit. Note that U25 pin 6 and 8 must be HIGH (5v) at all times.

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