Denon DVD-3930 Service Manual
Also see for DVD-3930: SpecificationOperating instructionsService manual
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12DVD-3930/3930CIDIAGNOSTICS OF OPTICAL PICKUPAND REPLACING TRAVERSE UNITMake failure diagnostics of the Optical Pickup as follows.If the laser drive current (Iop) becomes more than 1.5 times ofthe initial value, the Optical Pickup should be replaced.The laser drive current initial value is checked by "Iop checkedMethod" of next page.In case of replacing the Pickup, change the whole part of theTraverse Unit.No mechanical adjustment is necessary after the replace-ment.Laser drive current initial value:Disc no read, unsteady playback, etc.Laser drive current (Iop) checkHF wave form check(Refer to WAVE FORMS)Traverse Unit replacingLaser current (Iop) memorizing after replacementPresent value exceeds the ini-tial value by 1.5 timesCD:DVD: |
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