Open the machine cover, play a disc is a bit poor quality, found that although disc can turn, but turn a disc for a long time can read data. Take out the disc, observe laser focusing up and down movement is normal, the laser also has red light emission, again carefully observe the laser lens, found something like a layer of mist covered on the mirror, with cotton, cotton balls, a gently wipe the lens, the fog disappeared, electricity of commissioning, pick dish of troubleshooting. pULservice manual download site
 pULservice manual download site
This failure was the main reason: on the laser lens has dust, coupled with high humidity inside machine, caused by water mist shape material covered on the objective, makes the launch to laser disc is abate, if disc less reflective rate, will make the laser receiving laser is abate, thus affecting laser tracking, caused the failure.pULservice manual download site