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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