Manual
User’s Manual
EPI-QM87R/ EPI-QM87 User’s Manual 29
2.4.14 Serial Port 1/2 RS-422-485 mode (J422_1 / J422_2)
Signal
PIN
PIN
Signal
485_422TX1-
2
1
422RX1-
485_422TX1+
4
3
422RX1+
+5V
6
5
GND
Note:
J422/485 is available after modify the mode of
COM1/2 in BIOS setting
2.4.15 LCD Inverter Connector (JBKL)
Signal
PIN
+12V
1
GND
2
BKLEN
3
VBRIGHT
4
+5V
5
2.4.15.1 Signal Description – LCD Inverter Connector (JBKL)
Signal
Signal Description
VBRIGHT
Vadj = 0.75V ~ 4.25V (Recommended: 4.7KΩ, >1/16W)
BKLEN
LCD backlight ON/OFF control signal
J422_2
J422_1