Symptoms:2USservice manual download site
Boot sometimes reading sometimes not reading, reading no disc display keeps flashing horizontal lines.2USservice manual download site
Maintenance: disassemble observe the machine head using Sony KSS-213B,2USservice manual download site
2USservice manual download site
Transformers erect very delicate. A big circuit board filled all space, due to circuit design, circuit without bulky heatsink 78 series voltage regulator heatsink only the size of fingernails. Machine performance stability.2USservice manual download site
2USservice manual download site
Through repeated observations, not reading discs when accounting for most cases, laser light, obviously due to the slow speed of main shaft, measuring spindle get the 2.1 volts, spindle servo chip for BA3294FP, it is also commonly used for chip, the chip in nearly a decade of usage is very high in the dish washer. Measuring chip plus or minus 7 volts of power supply is normal. Measure CPU to drive the signal properly. Try a chip was replaced, repeated test machine without fault.2USservice manual download site