洛氏硬度计常见问题

1、开机无显示。

检查并确认电源开关打开,后背板电压选择开关选择正确,电源保险丝完好并安装完好，后背板内壁变压器输出插头与电源板接插好，电源板上三个保险丝是否熔断。

2、液晶显示画面不正常。

确定后背板电压选择开关选择是否正确;或去掉上盖紧固螺钉，抬起上盖确定液晶电缆接插完好。

3、开机后听到“轰轰”电机堵转时发出的声音。

立即关机，打开上盖（注意先拔去上盖与主板的连线），确定主板上带护套的三芯连线接插件接插完好。再次开机，依然听到“轰轰”声，观察电机附近接近开关上红色指示灯亮否。不亮，关机，用内六角扳手松开凸轮与电机轴的固定螺栓，在凸轮的档块与接近开关平行正对时将螺栓固定(档、块须稍稍高出接近开关)，最后将仪器连线恢复，盖好上盖。

4、键灯不亮或键操作失灵。

确定键盘连接电缆是否连接完好。

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1. No display on startup.  

Check that the power switch is on, the rear midplane voltage selector switch is correctly selected, the power fuse is properly installed, the transformer output plug on the inner wall of the rear midplane is properly connected to the power board, and the three fuses on the power board are fused.  

2. The LCD display screen is abnormal.  

Determine whether the rear backplane voltage selector switch is correctly selected;  Or remove the screws on the cover and lift the cover to ensure that the LCD cable is properly connected and inserted.  

3, after starting, hear the sound of "boom" motor blocking.  

Shut down immediately, open the cover (note to remove the cover and the motherboard of the connection), make sure that the motherboard with the sheath of the three-core connection plug is properly connected.  Boot again, still hear the "boom" sound, observe the motor near the proximity switch on the red indicator light.  No light, shut down, loosen the fixing bolt of the CAM and motor shaft with hexagon wrench, and fix the bolt when the CAM block is parallel to the proximity switch (the block and block must be slightly higher than the proximity switch), and finally restore the connection of the instrument and cover the upper cover.  

4, the key light is not on or the key operation failure.  

Verify that the keyboard cable is properly connected.