Question about Home Theater Systems
Hi, my DVD-Stereo's trays are all open. My nephew (child) inserted a DVD on top of another, as a result the trays got stuck. I opened the system and managed to manually push out all trays to take off DVDs. As a result i cannot push them back, neither can they by themselves when powered. Also, the radio does not take any signal even if the antenna is connected. This second problem has been existing before the first. Please help.
The system i had, had exactly the same problem, happened years ago but only got around to it now.
The case is quite fiddly and there are also potentially dangerous voltages inside so i would only do this if you are trained, and even then you do so at your own risk.
I have fixed the problem but i am not 100% on what the actual problem was. firstly i opened the system up and seeing as the problem was the stuck trays i went straight for the dvd mech (part 1) however that may not be necessary and the problem may have just been the front switches not reading properly (part 2).
**make sure the unit is unplugged**
-take sides off
-loosen front panel from base of system
-i removed the white plastic top of the dvd unit allowing you access to the screws holding the metal panel on to the dvd unit, removed the metal unit.
-there are two ribbons connecting the dvd unit to the main unit, the smaller one controls the motor drives.
-i plugged in the unit to test the motors, to do this i ground each pin coresponding to a motor (they are labelled) located a the header at the end of the smaller ribbon. (This can be done from the other end of the cable located on the side of the unit, which is much more accessible but not labelled)
-forced dvd trays back to their starting position (makes lots of noises)
-on the side of is a sliding mech that selects which dvd tray i made sure that moved back and forth freely (quite stiff as you are working against the motor) you should hear the motor turning.
put everything back together.
-when switched on it would go through starting sequence but NOTHING else.
-mech appeared to working but noticed front panel was not responding to button presses on the dvd area. the tape/dvd select and power button were OK though
-removed front cover and removed front panel circuit board, plugged back into system.
-without the front panel the buttons all worked and system all worked.
-replaced front bezel and system worked.
Posted on Aug 11, 2009
there are very tricky mechanical devices that detect when the trays are closed and in what position they are in
A gear or mechanical piece is not in correct order or not functioning properly and will need intense studying to determine which position they all should be in at door closed , laser mech. position , standby position
can you upload a photo of the inside of the cd mechanism?
Posted on Oct 18, 2008
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