Table of content 1 Preface 18 2 Appearance and size.19 2.1 Material and color 19 2.2 Display size and installation size 19 3 Function summary and button definition 20 3.1 Preset and default items. 20 3.2 Display figures 20 3.3 Button definition.. 21 4 Installation Instruction..22 5 Set up... 22 5.1 Preparation before starting the display 22 5.2 Start and entry setting... 22 5.3 Time set up..22 5.4 Set up max speed 23 5.5 Choice of display unit 23 5.6 Wheel diameter set up.. 24 5.7 Backlight contrast... 24 5.8 Quit from set up...24 6 Standard operation..25 6.1 Power ON/OFF 25 6.2 Speed display (current speed/average speed/max speed)...25 6.3 Switch power and select speed mode.. 26 6.4 Using 6 Km/h cruise control...26 6.5 Backlight ON/OFF...27 6.6 Distance display (riding distance/total 16
Distance )..27 6.7 Power display....28 6.8 Fault detective display...28 7 Button battery replacement..29 8 FAQ Answers 30 9 Quality warranty...30 10 Circuit block diagram...31 11 Software version 31 17
1 Preface Dear users, To ensure better performance of your e-bike, please read through the J-LCD product introduction carefully before using it. We will use the most concise words to inform you of all the details including hardware installation, setting and normal use of the display when using our display. Meanwhile, the introduction will also help you solve possible confusion and malfunctions. 18
2 Appearance and Size 2.1 Material and Color J LCD housing material: PC. Working temperature scope: -20 --+60, the shell material can ensure normal usage and good mechanical performance of the products. 2.2 Display Size and Installation Size Unit mm 19
3 Function Summary and Button Definition 3.1 Preset and default items J LCD user settings include: local time; max speed; metric and imperial MPH or Km/H Mile or Km wheel diameter 18 28inch ; LCD backlight contrast. 3.2 Display figures J LCD displays battery capacity, time, motor power ratio, riding speed, riding distance, 6Km/h walking cruise, and fault detective code of the electronic control system. 20
3.3 Button Definition J LCD is equipped with special 30 button. This operating button suit for both L/R hand, button instruction see figures: 30 button is connected to the bottom of the display through wire cable. In the following introduction, is named as MODE. is named as UP and is named as DOWN. 21
4 Installation Instruction Fix the display and 30 button on the handlebar and adjust to an appropriate visual angle. 5 Set up 5.1 Preparation before Starting the Display Make sure connector linked properly to the motor controller on the bike. 5.2 Start and Entry Setting Press the MODE button and start the display. After start-up, please hold both UP and DOWN at the same time, for 3 seconds, LCD will enter into the setting state. 5.3 Time Set up After entering into the setting state, first set the HOUR by using UP and DOWN. Press MODE for confirmation and then set the MINUTE by UP and DOWN. Press for Confirm by MODE then move to set up the max speed. Setting HOUR Setting MINUTE 22
5.4 Set up max speed Default set up in factory is 25 Km/h. Re-set speed must check local regulation speed exceed your re-set figure power will be automatically cut off. Speed option: 10-35Km/h, use UP or DOWN then confirm by MODE. Set up max speed interface 5.5 Choice of Display Unit (Metric system/ English system) Press UP or DOWN to choose unit either metric or imperial this will affect both speed and mileage display. Imperial Unit Metric Unit 23
5.6 Wheel Diameter Set up UP or DOWN choose a right diameter for the bike. Default set is 26. The interface is as follows: Press MODE to confirm the wheel size and enter into the LCD backlight contrast set up. 5.7 Backlight contrast Press UP or DOWN to modify the backlight brightness. You can choose from level 1 to level 3. Level 1 is the minimum brightness. Level 3 is the maximum brightness. The default value of the backlight brightness in J LCD display is level 1. 5.8 Quit from set up Press MODE no more than 2 seconds is confirming the input, then press MODE more than 2 seconds is saving current new set up. 24
6 Standard Operation 6.1 On/Off Press MODE and the display start to work, and power on to controller, long press MODE then switch off power, under off display and controller no longer consume battery power. Suggestion Take off battery from bike when stop using bike over 4 hours. 6.2 Speed Display (Current Speed/Average Speed/Max Speed) When the e-bike starts, the display will automatically show the current speed. Hold UP and the display will show the MAX speed during this ride. Hold UP again and the display will show the AVG speed during this ride. Hold UP again and the display will turn to the current speed display. 25
The interface of switching speeds 6.3 Switch power and select speed mode Press UP or DOWN change motor output power. Power level from 1 to 5, 1 is lowest 5 is highest, default is 1. Motor power level 6.4 Using 6Km/h cruise control Press DOWN for a while bike get into power assist mode, bike running at fixed speed 6Km/h. Interface of power assist walk Warning 6Km/h PAS cruise mode is recommended under push state, not for riding mode. 26
6.5 Backlight ON/OFF Hold both UP and MODE for 3 seconds, switch on the J LCD backlight. When the surrounding light is not enough or it is in the evening, you can turn on the backlight. Hold both UP and MODE for 3 seconds again and you can turn off the backlight. When the backlight power ON, the headlight also power on (if the bike assembled with a headlight). 6.6 Distance Display (Riding Distance/Total Distance) Press MODE for single trip and accumulate trip. This function is convenient for users to check the riding distance (TRIP) and the total distance (ODO). Range Interface 27
6.7 Power Display Full power 5 bars all on, battery logo edge flash means power shortage in critical. Need change now. Battery Voltage Low Voltage Flash 6.8 Fault detective display If there is something wrong with the electronic control system, the display will show the error code automatically. Please the following code in the following chart: Code number Definition 21 Abnormal current 22 Throttle fault 23 Motor phase problem 24 Motor Hall defect 25 Brake failed Definition Diagram of Error Codes Display back to normal only after problem being fixed and bike will not run before fix the problem. 28
Error Code Display 7 Button Battery Replacement Ride your bike in a safe way. Don t hit or knock the display. When you replace the display battery, please detach the display from the handlebar first. Take off the battery cap and put in a new battery. The model of the display battery is CR2032. This button battery is used exclusively for the timer IC inside the display. The life time of the button battery no short than 3 year. Attention: Please re-set local time after change button battery. 29