After inspection, found that the control of laser moving two metal guide (the other is smooth cylindrical, called polished rod, a root is a square table threaded, known as the lead screw, it drives the laser mobile) on the stick a lot of dust cotton, silk, etc. Analysis may be due to two metal rods is too dirty, result in laser head movement difficulties or unable to move, resulting in the failure. RhEservice manual download site
 RhEservice manual download site
Carefully remove the screw, plastic card pin, cannot separate with the fuselage found pan, will test the machine after the tilt Angle can see two guide rail, considering the metal tweezers would scratch metal rod or broken circuit board with attachment between laser and then use a toothpick wrapped in cotton, dip in on a small amount of anhydrous alcohol (don't dip, or alcohol will flow into the machine) in the heart, carefully clean the two metal rods. RhEservice manual download site
Must move at this time the problem is the laser to thoroughly clean the two metal rods. Way is: after the electricity into a CD, a small stick with hold the machine cover one end connected to the fuselage of a switch (press and hold the switch machine to work properly), laser action immediately after shutdown. The laser has been moved to another location, remove the disc can be after cleaning. After this repeated several times after cleaning, found that the screw thread slot on the dirt in the more difficult to remove. Adopt the method is: use the method of choosing what a position outside the laser head stays in the disc, shutdown, and then in the boot screw rotates, cotton swab to clean. Because of laser reset time is very short, so when cleaning must be fast, don't let toothpick stuck laser! Repeated several times after two metal rods was finally clean thoroughly. Place your machine 5-10 minutes, after waiting for alcohol volatile clean installed commissioning, laser reset is normal.RhEservice manual download site