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Panasonic A300MU type DVD machine electricity power, smoke fault repair method

Time£º2014-07-09 09:33:59  Source£ºNetwork  Author£ºUnknown  Clicks£º1202
  

To observe the function smoothly into and out of the box, can also read disk, mechanical system. Open the case check each part of the movement and gear mesh, has not been found. Electricity observation found a red laser and laser components and its focus, tracking all action. Laser components when the power is off and removed from the connector FP2001 flat cable, electric resistance of the laser, the actual measuring its positive and reverse resistance of infinity, laser is also normal. Estimate fault is in servo drive circuit. Qkdservice manual download site
 Qkdservice manual download site
See below, the multimeter test servo DSP circuit IC2001 (AN67700) 5 feet of the power supply voltage of 5 V, normal, and test drive circuit IC2051 (AN8812D focusing and tracking (18) and (17), found that attending foot voltage of 1.2 V (normal is 2.5 V). Check the peripheral components, it is found that IC2055 (1200) pf capacitor leakage. After replacing IC2055, troubleshooting.Qkdservice manual download site