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    Function Description    X400 V3.0       
     
   
 
❶ Power Switch Connector
❷ 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
 
     
 
❷ 26-Pin GPIO Pinout
 
   
     
    Board Assembly
     
 
❶ Required tool - Pozidriv Screwdriver
 
❷ Required Accessories

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

   
     
 
    Case Assembly
     
 
❶ Required Accessories

 
❷ 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)
     
❸ The four screws (M2.5*28mm) not screwed over the Raspberry Pi B+'s PCB
 
❹  Unscrew the nut from power switch and mount it to top cover
     
     
❺  a) Insert the connector of power switch into the X400 as arrowed below.
b) Remove the jumper link for "PWR"
 
❻ Mount the board assembly onto the bottom case and screw down.

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

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