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1Q1. Why my headphone left channel has no sound?
2Q2. Can X400 v3.0 board can be used on Raspberry Pi Zero W or Raspberry Pi Zero?
3Q3. Why the power switch isn't working? The LED is always green but doesn't function. When I put the power on, the Raspberry Pi is booting regardless of whether the button is on or off.
4Q4. Which DAC model do I set with piCoreplayer?
5Q5.Can I have my phone charging at the same time as I have it attached to the rca playing music, or will that fry the system?
6Q6. Does the X400 V3.0 support to use with the X862?
===FAQ===
Customer Feedback:
Answer: If you happen to meet this problem, please just contact us by email and attach order number, and we will help you send a headphone cable to solve this problem.
Answer: Theoretically speaking it will be compatible, but not actually it is tested, so we can not confirm.
Answer: There is a jumper cap on the PWR (on the X400 board beside the 3.5mm jack headphone), when using an external power switch to control power on/off, please remove the jumper cap. Please refer to the following picture.
[[File:X400 board PWR.jpg|700px|]]
Plase choose the '''iqaudio-DAC''' .
Please do not use X400 or rasdpberry pi to charge your phone, it is not support to charge the phone.
Yes, it is OK but note the power supply must only connected to X400.
Q7: When I plug in headphones to the 3.5mm jack on the DAC they work fine but the speakers also stay on as well. How would I make just the headphones work when they are plugged in & the speakers would be off?
Please move the jumper cap on MUTE to '''AMP''' to solve the issue.
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