Denon DVD-1740/558 Service Manual

21DVD-1740/558FLOW CHART NO.18[No Disc] indicated. (When the focus servo is not functioning.)FLOW CHART NO.19[No Disc] indicated. (When the laser beam does not light up.)Replace the DVD Main CBA Unit.Replace the DVD Mechanism.NoYesReplace the DVD Main CBA Unit.Replace the DVD Mechanism.NoYesNo improvement can be found. Original DVD Main CBA Unit is poor.No improvement can be found. Original DVD Main CBA Unit is poor.FLOW CHART NO.17[No Disc] indicated. (When the focus error occurs.)Replace the DVD Main CBA Unit.No improvement can be found. Original DVD Main CBA Unit is poor.Replace the DVD Mechanism.NoYesYesFLOW CHART NO.16The disc tray cannot be opened and closed.Replace the DVD Main CBA Unit.Original DVD Main CBA Unit is poor.Replace the DVD Mechanism.No improvement can be found. NoYesFLOW CHART NO.15The disc tray cannot be opened and closed. (It can be done using the remote control unit.)Is the normal control voltage inputted to Pin(31) ofIC2101? Refer to "FLOW CHART NO.13" operation is not functioning.>Refer to "FLOW CHART NO.16" cannot be opened and closed.>Replace the "OPEN/CLOSE" switch (SW2108).No