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    Function Description    X400 V3.0       
     
   
 
Power Switch Connector
Jumper Setting
Pin No. Pin Description
1  5Vdc connecting to LED +
2  GND connecting to LED -
3  GND connecting to switch
4   Power on/off control connecting to switch

 1. Latching power switch should be used.
 2. Jumper link for "PWR" should be removed if power switch used
 3. Connector - Pitch 2.0mm 4pos
Jumper Name Usage
Mute  Short - Speaker mute disabled
 Open - Speaker mute controlled by GPIO22
              GPIO22 high - Mute disabled
              GPIO22 low  - Mute enabled (no sound)
AMP  Short - 60W amplifier in shutdown mode
 Open -  60W amplifier in working mode
PWR  Short - Power on when power applied
  Open - Using an external power switch to
               control power on /off
 
     
 
26-Pin GPIO Pinout
 
   
     
    Board Assembly
     
 
Required tool - Pozidriv Screwdriver
 
Required Accessories

     
Push a screws (M2.5*6mm) up through the mounting hole on the underside of the Raspberry Pi.
 
  Screw the spacer (M2.5*20mm) down until it is hand tight
 
     
  Plugs the X400 board straight into your Raspberry Pi B+'s GPIO header and screw down (M2.5*6mm)
 
 

   
     
 
    Case Assembly
     
 
Required Accessories

 
a) Remove the plug from terminal block connector
b) Push a screws (M2.5*28mm) up through the mounting hole
    on the topside of the X400.
C) Screw the spacer (M2.5*20mm) down
d) Plugs the X400 board straight into your Raspberry Pi B+'s
    GPIO header and screw down (M2.5*28mm)
     
The four screws (M2.5*28mm) not screwed over the Raspberry Pi B+'s PCB
 
  Unscrew the nut from power switch and mount it to top cover
     
     
  a) Insert the connector of power switch into the X400 as arrowed below.
b) Remove the jumper link for "PWR"
 
Mount the board assembly onto the bottom case and screw down.

   
     
  a) Snap the top cover and bottom case together.
b) Screw the top cover down (M3*5mm)
 
  Screw the top cover down (M3*5mm)
     
  Screw the top cover down (M3*5mm)

  Insert the volume knob into the handle of potentiometer and fix with an 1.5mm hex key
 
     
  Insert the plug into the SPK & Power terminal block
   
     
 
 
       
 
     
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