I have 2 cd players that were working and are not now. One is a 1990 pioneer pd-m430. The lens fell out of the laser (common problem) and I put it back it. When I put the disc in the laser adjuster just clicks up and down. The motor does not spin. The motor does work, I checked it. Tried various CD's that I know work. The other machine is a decade newer, Symphonic cd5800 , completely different machine and it does the exact same thing. How strange. I cleaned the eyes on both machines. Both will not spin the discs. Any thoughts.
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Re: cd changers not reading cd's
you already know it's the laser assembly.
if you put a sheet of paper over the lense as a defuser, can you see the red dot?? -
Re: cd changers not reading cd's
the mirror might need cleaning . can be a fiddly job .Comment
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Re: cd changers not reading cd's
I can see some red thru the lens (yes I am 30cm away from laser) but it wont project onto my hand or a piece of paper. One issue that is the same on both machines is that the cd wont spin. In the repair flow charts it says the laser tries to focus (which they do) and the disc spins (which is doesn't). Its strange.Comment
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Re: cd changers not reading cd's
no, usually the laser comes on, and the sensor triggers the system to start the motor because it see's a reflection.
then the system trys to tune the focus by ajusting current to the coils under the lense.
so no reflection detected - no disk spinup.
the paper trick must be thin paper placed directly onto the lense - the laser is focussed only a few mm from the lense.
in theory if you use shiny paper or foil the motor may kick for a second.Comment
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Re: cd changers not reading cd's
Reflection method not working on both machines. What is the small micro pot on the side of the laser head. Might be worth playing around with some adjustments before trashing the units.Comment
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Re: cd changers not reading cd's
that's the current to the laser i think - it's not going to cause total failure.
i suspect your problem is mechanical.Comment
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i am asking for some Help.
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The Motor didn´t start anymore and internet is full of users just swapping the motor for a Mabuchi RF-500TB-12560.
So i got a few of these from Banggood.
I swapped the motor and now i have a new fault condition.
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If you press longer it will light blue and just mixup the milk.
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Samsung HT-X250 Laser Fix Cd /DVD reading - call home position random error
Increase just little bit both trimmers for both laser diodes on the laser pickup, about 5-10%.
On the RC51 capacitor 22uf 25V that is near laser diodes transistors but has to do with the main processor,
connect in parallel a capacitor of 1000uf 10v and from their
positive a 1MOhm resistor to 5V stabilized system voltage line that is only on when the system is on.
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Hi all forum members,
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Correct me if i am wrong on the initial test.
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