Matrix XR Service Manual page 47

8.1.3 XER UCB Ports Description
A Hand Grip
B Wireless HR
C MCU debug
D Fan
E Touch Panel
F Safety Key
G TFT back light
H 12C keypad
I Digital Interface
CHAPTER 8: TROUBLESHOOTING
J USB+ErP LED
K USB+Audio in
L Speaker
M Earphone
N WiFi antenna
O NFC (Reseved)
P TF card
Q Uart print port
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