Question about Sony CDP-CE345 5-Disc CD Changer
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Posted on Jan 02, 2017
u must remove the broken old door carefully by removing the rubber belt which is connected to the dc motor and bear by there be a white colour plastic which holds the door u must remove that and then u must put replacement & once again u must connect those all properly so it s difficult... just visit technician....
Posted on Feb 06, 2008
SOURCE: Sony CDP-C505 door stuck open
The slider mechanism, depending on the age of the unit and the
manufacturer, consists of the small chrome rail, a drive motor, a small
gear assembly, and (in some units) a small belt that drives the slider
unit via the motor. This small belt causes all sorts of problems. If
the belt is broken or slipping, it can cause skipping, dropouts, or
simply no start up at all. Also, if the belt breaks in the middle of
the disc, the drive mechanism gets hair or dirt wrapped up into the
gears, or the pick-up assembly doesn’t return to the start position
(called home), the unit will (99% of the time) refuse to release the
disc, causing it to become stuck inside the unit. There’s a little
micro or leaf type switch located at home position that sometimes gets
dirty or breaks and, causing this problem also.
If the disc starts to spin slowly and doesn’t come up to speed, the spindle motor that’s attached to the turntable platter is a common problem. There could also be a problem with the spindle motor driver controller IC or the power supply regulator that supplies voltage to the driver IC. If the disc starts to spin and then spins really fast, or stops and starts to spin backwards, your problem is the laser pick-up assembly or the servo control circuit. If you continue to have problems after cleaning and checking the other things listed above, you may have a problem with the player's alignment. Of course, one of the problems you'll face checking alignments on a DVD/CD player is that you’re going to need to use an oscilloscope on most of them. If you have the proper tools and equipment, the first thing to look at is the RF pattern of the unit while its playing. It should be a sharp and clear pattern. If it's dull and smeared, then the laser could be weak.
Also, in these units are very critical alignments called the focus/tracking gains and offsets. When these alignments are off, it can often cause intermittent troubles. As the unit ages and parts change value, so do these alignments, and will need to be checked. In my time as service technician repairing DVD/CD players, 65% of the laser pick-up assembles I have tested were good and only needed a small adjustment. Today's technology makes it unfeasible for a shop to hook up a DVD/CD player, and even some recorders, to their equipment and make these adjustments because of the cost involved.
Hope this may help;
DON'T TO FORGET TO RATE
Posted on Aug 17, 2008
SOURCE: sony cdp-c545 won't open
Without turning the unit upside down, look at the bottom of the player. You should see a small round hole toward the front of the unit, with a white plastic part inside with a slot. Take a screwdriver and turn this gear manually with the power off. You should be able to unload the discs by rotating this gear. Be careful not to tilt the unit, as the discs will fall out of the tray, and you'll have to open it to retrieve them.
Once you have the discs out, put in only one disc and see if the unit plays. If you get a disc error, you probably need to clean the lens on the laser. Open the unit, use a cotton swab that has been pre-wetted with glass cleaner to wipe the lens on the laser. Do this gently, don't press down hard on the lens. Use the other end of the swab to dry the lens. Try loading a disc with the top cover off and see if it spins. If it doesn't spin, try turning it by hand. If you can't turn it by hand, the gears have gotten out of alignment.
In this case, use your screwdriver again, noting which way the gear on the bottom of the unit spins when the drawer is going into the unit. Then turn the gear until it "pops" past one or two teeth, and then you should see the laser assembly rise up and meet the clamp assembly on the top of the tray. These are the most common problems with the 5 disc players that Sony made. Many times I could fix them in 30 seconds or less using this procedure.
Posted on Mar 02, 2009
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