Boot, abnormal visual inspection of components has not been found. After put into the disc machine has abnormal noise. RDTservice manual download site
 RDTservice manual download site
So the preliminary judgment fault in machine parts. First of all, the machine of tablet (special black plastic honeycomb structure), and visual laser lens clean and dust-free. Electricity after laser injection and focused action. But in a disc after a spindle motor, movement have abnormal sound, side turned out to be the voice of the laser optical lens djing. RDTservice manual download site
 RDTservice manual download site
When I pick up the machine carefully check, left index was suddenly very hot, quickly without electricity, flip movement examination, turned out to be a Numbers for IC2501 integrated circuit (BA5923F) caused by high temperature. RDTservice manual download site
 RDTservice manual download site
 RDTservice manual download site
Since there is no related circuit diagram, so only through the actual circuit is analyzed. Due to the integrated circuit respectively connected to the spindle motor and tracking, therefore, concludes that the integrated circuit should be circuit of servo drive. Energized again, with his hand upon the disc, the disc suddenly turn up, images, sound, later also came out, and BA5923F also no longer hot. RDTservice manual download site
 RDTservice manual download site
Disc trial hand force stalling and BA5923F hot soon. The positive attached to the machine spindle motor BA5923F 17 feet, negative connecting BA5923F 18 feet, measured when disc don't turn on both ends of the spindle motor voltage between 3 ~ 6 v, and BA5923F heats up quickly; When the normal rotating disc measured on both ends of the spindle motor voltage is between 0.8 ~ 1.6 V. On the basis of judgment spindle motor has a problem. RDTservice manual download site
 RDTservice manual download site
The machine spindle motor model for MDN3ST3HSAS, local can't buy. So spindle motor will be removed, and to be immersed in the anhydrous alcohol, give motor after only 5 batteries, let the motor at high speed in the anhydrous alcohol to do cleaning. 3 minutes and then transform the polarity to continue cleaning cleaning. RDTservice manual download site
 

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