If there is no flight time or no jet speed or a bad point split, we can use a magnifying glass to see how the dot split:
If there is still no injection speed, if the point splits very well, but there is no injection speed, then check the pipe ground line, the pipe ground line may not be connected, or the entire ground line of the machine is not connected. If the ground line is also connected, point split is also good, we look at viscosity, if viscosity is also normal, then we consider the motherboard problem, the motherboard may have a problem, we finally consider the motherboard.
First of all, we look at whether the viscosity is normal, viscosity is normal, whether the ground line is connected, if the ground line is connected, see how the point split, if the point splits well, the ground line is also connected, but it still does not have jet speed, then this situation is likely to be a problem of the motherboard.
Let’s look at the back of the machine, this is C1, C1 stands for optoelectronics:
