HK950 Service Manual
2.2.1 Mainboard appearance is as follows:
Mainboard
identifies
port
Port details
1.COM4
Serial port connector
Serial port 4 (live 5V / 12V)
2.COM3
Serial port connector
Serial port 3 (live 5V / 12V)
3.COM2
Serial port connector
Serial port 2 (live 5V / 12V)
4.COM1
Serial port connector
serial port 1
5.R_USB3
USB connector
rear double USB2.0 interface
6.R_USB1
USB connector
rear double USB3.0 interface
7.HDMI1
HDMI connector
rear HDMI interface
8.VGA1
VGA connector
Rear VGA port
9.CASH1
RJ11 connector
RJ11 interface ,24Vcash drawer
10.DC_IN1
DC 24V power connector
System power connector
11.DC_OUT1
DC 12V power output
12V power output
12.RJ45_1
LAN connector
Network Interface
13.JACK1
Headphone connector
Headphone jack
14.R_USB2
USB connector
Rear double USB2.0 interface
15.BAT1
CMOS Battery
Mainboard COMS battery
16.J_LPT1
LPT connector
Parallel printer interface
17.F_PANEL1
Front Panel connector
Switch board interface
18.J_SPK1
1*4Pin 2.0mm wafer box
Onboard speaker output
connector
19.TOUCH1
Resistive touch connector
Resistive touch screen interface
20.F_USB3
USB header
On-board USB interface
21. DIMM1
1*260pin SO-DIMM Socket
DDR4 memory interface
22. F_USB2
USB header
On-board USB interface
23.J_COM6
Serial port header
Onboard serial port 6
24.F_USB4
USB header
On-board USB interface
25. J_COM6
Serial port header
Onboard serial port 5