Frequently asked questions about spirit levels
1 The switch knob is not fully turned.
2 Open the case and check whether the copper wire is desoldered. In general, if there is a horn sound after the battery is installed, but no light is on, this is the case
3 Battery box—check whether the welding wire is broken, and whether the spring is in good contact with the battery.
4 Test the switch circuit to see if the micro switch is energized or not. If it is energized, it means that there is no problem with the switch. If it is not energized, please replace the micro switch.
5. The main board of the line, if all the above problems are checked, the main board must be replaced.
6 The horizontal line of the laser tube is not bright: first check to see if the copper wire is broken, and then check whether the lower pair is on or not. If the lower pair is not on, you have to remove the black wire from the last line of the wiring board , the horizontal line is just fine.
