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In the DVD playback suddenly appeared without drawing silent, can determine the internal circuit components are damaged. The machine has a "squeak" abnormal sound, some mechanical problems that. Display in the open, the power off the display of the moment. Power indicator light, indicating that the power circuit work is basically normal. In the system control, servo processing and so on.Bejservice manual download site
Open the cabinet, found in the boot, the optical disk can rotate slightly, every few seconds after the CD, and then by the appearance of "squeak" sound.
Check other components found no exception. According to the display in the opening and closing moments of the display, the disc can be a slight rotation, can be a preliminary judgment in the power circuit fault. First check the power supply circuit, the output voltage and measured normal + 12V; in both ends of the C602 measured voltage of + 5V only +3.8V. See figure; at both ends of the c601 6V voltage and disconnects the load test retest at both ends of the C602 + 5V voltage, at both ends of the c601 10V voltage and illustrate the + 5V power supply load problems. According to the principle of easy to difficult, the +5V power supply branch is checked. Using a multimeter to measure VD601-VD604, C601, static C602, EH601, VD601 found a bridge rectifier diode positive values of 3K. The reverse of 100k., is a basic resistance; positive and negative values of 2M. VD603, approximate open. Replacement VD601 VD603, starting the plus electric, panel display, the function keys are in normal operation, the machine nor "squeak" sound the troubleshooting.
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