X735 Power issue

• t

  tzei57

  1/4/25, 8:44 AM

  Just received the X735 and USB C power supply, and it doesn't power the powering the DAC. 

  Raspberry 4B is configured as a DAC running PiCore player. 
  Everything works without the X735. 
  When I install the X737, the DAC no longer lights up, and PiCore sez that the DAC not running, seems its not getting any power. 

  My stack is lised below,  Is there a setting I need to change to power the DAC? The DAC was being powered thru the Raspberry, do I need to have a separate power for it now?

  Thoughs?
  Thanks, 
  Tom Zeibig, tzei57@pm.me

  Top:  Raspberry Pi HiFi DAC pro Hat ES9038q2m Audio Card PCM DSD
  Middle: Geekworm X735 V3.0 DC 6v-30V
  Base:  Raspberry Pi4 Model B 2019 Quad Core 64 bit WiFi Bluetootn (4GB)
  Under Base: Geekworm for Raspberry Pi 4 SAT Storage X825 V2.0 2.5 in SATA HDD/SSD

  Buffalo External SSD 500GB
  geekworm power supply 20w, 5v, 4A USB C

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• HH

  Harry Huang Staff member

  1/6/25, 6:22 PM

  @tzei57

  Can you please send me a picture of your fully assembled unit? Or email us at support@geekworm.com.

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• p

  poly.track.io

  1/21/25, 5:03 PM

  @PolyTrack In some cases, the PiCore or Raspberry Pi OS may have a software configuration related to power delivery over the USB ports. You can try reconfiguring or checking the settings related to power delivery.

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• OK

  Otis Kelly

  2/24/25, 4:33 PM

  Hey Tom,

  It sounds like the X735 isn’t passing power through to your DAC, which makes sense since the Pi typically powers HATs through the GPIO pins. Adding the X735 might have interrupted that. A couple of things to check:

  1. GPIO Power sprunki phase 5 – The X735 doesn’t pass power through GPIO by default. Your DAC was probably getting power through the 5V GPIO pins when the Pi was powered directly. You may need to run a separate 5V power wire from the X735 to the DAC or check if there's a jumper on the X735 that enables GPIO power.

  2. External Power for DAC – Some DACs need dedicated power instead of pulling from the Pi. Does your DAC have a separate power input option? If so, try powering it separately from a 5V source.

  3. X735 Power Configuration – Check if your X735 is properly supplying power to the Pi. Sometimes, issues arise when the X735 isn’t initialized correctly. Try booting without the DAC first, then attaching it after the Pi is fully up.

  4. PiCore Settings – If the DAC isn’t being recognized, PiCore might not see it without proper power. If you get it powered but still not detected, try checking the dmesg log to see if the DAC is even registering:

      

     dmesg | grep -i usb

     or

      

     dmesg | grep -i i2c

     If it’s missing, power is likely the culprit.

  5. Power Draw Issues – Your power supply is 5V 4A, which should be enough, but with a DAC, SSD, and Pi all running, you might be close to maxing out. If possible, try testing with a separate power source for the DAC to confirm if power draw is the issue.

  Let me know if any of this helps!

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