Question about Philips Audio & Video Receivers
This error "disc error", "no disc present" or " can\'t read cd". This all error are related to lens problem.If the lens is dirty or if the lens is got cracked or if the lens is getting blocked then it can happen.The lens is very thin glass material.You can say the lens is the "eye" of the unit.If the eye is dirty then it will not see the object.The unit needs to be opened carefully and this lens has to be checked.If any dust is collected clean it.Using the cd lens cleaner helps,but if the dust is got stuck hard or if its any other internal part then the lens cleaner will not help.If the lens is got cracked then the lens assembly has to be replaced.
You can use dry tissue to clean the lens.once the unit is opened.------------This will help.Thanks.Helpmech.
Posted on Dec 14, 2010
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Aug 23, 2012 | Nakamichi CD400 Sound Quality CD Player...
In most cases when the CD does not play it is possible that the optical head is a suspect. Sometimes it might pick up ordinary audio CD but will not play other formats. This indicates that the optical head is weak and so there is no detection or scanning of the CD . If the optical is working the tracks will be read immediately but with no scanning the laser head can be defective.
If the no disc comes even without a disc in the player you must check and see if there is a mechanical fault specially in the loading section that seems to trigger the CD mode to work.
Also check to see the main motor as it will not work in some cases as unless the tracks are read the drive motor will not work with signal from the processor. Also in some cases the central motor base can shift and so the distance to the disc can be more resulting in low detection. You can pull up the spindle to come closer.
Sometimes certain cleaner disks will not be tracked to run for cleaning as it will not be read and so will reject. Hence it is ideal to manually clean the laser head eye using a cleaning swap /cotton bud with gentle pressure on the lens eye.
If there is no result then watch if the CD spins or tries to spin. If so the board seems to work unless a test is taken on the main board but the possibility of a defective optical head can be the suspected fault.
If any of the above seems otherwise we must recheck with possibilities of a malfunction of the main processor board
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