Avalue EBM-A50M - Manual (Page 13)

Quick Installation Guide
EBM-A50M Quick Installation Guide 13
2.3.9 LCD backlight brightness adjustment (JVR)
* Default
Signal PIN PIN Signal
+5V 1 2 DC
VR 3 4 VR
GND 5 6 PWM
Variation Resistor
(Recommended: 4.7KΩ, >1/16W)
Mode1: VR type
Mode 2: DC type*
Note: DC: 0V ~5V
Mode 3: Pulse-Width Modulated type
Note:
For inverters with adjustable Backlight function, it is possible to control the LCD brightness
through the VR signal controlled by JBKL1. Please see the JBKL1 section for detailed circuitry
information.