1, by the operation view of key of face plate test checks ammeter to have indicate without electric current: If do not have electric current: Whether does power source of examination laser power source put through, whether the high tension line becomes loose or fall off, whether does line become loose; If have electricity: Canal of whether broken, laser gives examination lens whether are smooth aperture and lens polluted, smooth way is serious deflection.
2, system of examination boiler circulation is regular: Be illogical water: Whether examination water pump damages or do not have electrify; Connect water: Whether does examination water inlet, mouth giving water accept Nor conduit crack.
3, fixed fire can give light, computer does not give off light when control sculpture, control plate of examination engraving tool connects a line occasionally to the light of power source.
4, laser report source board damages (manufacturer maintains) .