APM2.5 no power from Power Module

I have an APM2.5 in AuruCopter mode.

I am able to power on and connect to the unit via direct USB connection.

When I connect my 14.7v 4S LiPo to the Power Module and then connect the PM to the APM2.5, it does not power on.

Power Module '3DR APM 2.5 model 2012-09-24'

APM v2.5.2

 

I have confirmed:

- 15.06v on the LiPo terminals

- 15.06v delivered via the Output on the PM (to ESCs)

- 1.03v when I test the +5v pad on the PM. Confirmed voltage on the female end of the APM connector (red wire and next black wire)

   - 1.03v confirmed across pins on back of APM unit 

- 1.45v when I test the 'V' pad on the PM. Confirmed voltage on APM connector (last wire before 2 ground wires)

   - 1.45 confirmed across pins on back of APM unit

- 0v on the 'I' pad on the PM

 

JP1 is OPEN

 

Mission Planner 1.2.69 (Optioanl Hardware, Battery Monitor) reads 15.012v when the APM is powered by the USB port

 

Help please.

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Replies

  • Hi,

     

    This ended up being a bad part, cheap PM from China.  Swapped it out for one from 3DR and the APM works fine.

     

    -Ty

  • A buddy of mine is having this same issue. He's using an RCTimer ArduFlyer. 

    I'm going to test his power module on my APM tomorrow to see what happens.

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