Due to different product batches, the circuit board printing is slightly different, which does not affect the use. Notice:Disconnect power before installation, Then, wash your hands, if you can, please wear an anti-static bracelet. Make sure the motherboard is installed, Finally install the battery. New and high quality. MOS Aluminum Substrate for One Z10 Scooter Spare Parts. Compatible for Z6 Z8 Z10. 1. Disconnect the battery,DC power supply and other power equipment from the vehicle circuit board 2. and hold the power button for 10s to drain part of the capacitor(If you just connected the power supply,you see the controller indicator flashes-times,similar to turning on and off) 3. (1) and hold the start button for 20s or short the button for 20s.(2)Stop the key action and set the multimeter to the voltage range.(3)Point the red test pen of the multimeter on the position of P2 on the aluminum substrate in the figure(The widest pin of MOS),the black pen point is at the position of aluminum substrate P1 in the figure(There are three anti-paints on the aluminum substrate components,which need to contact reliability)(4)Observe the voltage value displayed by the multimeter,if the multimeter displays the voltage,Value is 1V,Repeat step (1)-(4) until the voltmeter shows that the value is below 1V 4. Remove the old main control board and replace it with a new one.(1)Unplug the battery connector harness(2) the switch button to discharge.During the discharge process,you need to use a multimeter to measure the voltage value across the capacitor on the MOS aluminum substrate at any time.The voltage value is less than 5V,otherwise you need to the switch button again to discharge Color:Black Material:PC+Aluminum Alloy Package Contents: 1 * MOS Aluminum Substrate Execution Control Board Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.