Thursday, November 15, 2012

SONY - DVP S300_DVP S500D_DVP C600D_DVP S7700 _ Powers OFF 2 seconds after Power ON



There are 2 causes for this problem.

  • An internal IC short will load down a power supply voltage. This removes the voltages to the other ICs and communications end. Once ICs communications end, Syscon shuts down the DVD player because it senses a defect.
At power ON the laser must be detected at home position or the unit will detect a malfunction and shut down. If the sled motor is frozen, the laser will not return to home.

Repair Procedure
  • If the power supply board makes a chirping noise when you press the power button, an output is being loaded down. Measure the output voltages to find out which one. The most common shorted ICs are:
Function
IC
Ref * in DVP-S500D

Large Gate Array [LGA]
CX8728Q
IC804

Audio DSP
CX8730R
IC504

  • If the power supply is OK, the sled may be defective on these older units.  Remove the lid that houses the mechanism and slide the laser away from home at the spindle motor. At power ON, the laser should travel to the spindle motor (home) then move outward. If home is not detected, the laser assembly will incorrectly remain where it is and the unit will shut down. The sled motor assembly is P/N = X-394-713-71.


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