Well,if you read all posts of this discussion, you can see that my player works fine if i let it warm up for 10 minutes even without playing any cd,so lubricate the spin motor it is not the solution...Anyway thanks for reply
Mine as well and I am tired of the winter, so my apartment is heated now at around 20 degrees - no audible glitches.
Can it be a mismatch between sled motor and lens coil based on the tracking error signal?
I guess, 2 seconds between glitches - 16 turns of a CD -
the horizontal range is completely handled by the trackig coil of the lens and that the sled motor kicks in after a longer time to center the spiral track horizontally over the lens.
Maybe, the signal for the sled motor simply starts too late and is "delayed" so to say?
The sled motor does not compensate progression of the CD until the lens reaches horizontal maximum.
Because the lens can not move any further, an error signal is produced, and the sled motor, reacting now like it was a scratch or off centered CD kicks in for compensating.
But because the lens is still close to maximum, the error comes back after 2 seconds and sled motor reacts again. This goes on for some time until the player becomes warm and the horizontal mismatch
between sled motor an lens coil disappears and they work in "harmony".
Just another guess...
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The inner tracks having problem is always a spin motor/axle problem. Looks like the viscosity of the lubricant changes after heating and things get improved.
Gajanan Phadte
Gajanan Phadte
1. Bad axe/shaft/bearing: Angular Errors rise towards the outer edges of a CD. Error will not disappear
2. Are you using vaseline or lanolin for lubricating?
Then you are correct with "temperature theory"!
Use a proper lubricant next time! Any other will do the job.
3. Even with mango pulp as lubricant:
The motor has to move a brass clamper puck that weights 150 grams.
This is at least 5 to 6 times more weight and mass than regular transports have to handle!
But still the player is able to change track and spinning speed within a second when going from last to first track and vice versa .
Again, lubrication has the least effect.
4. It is a brushless spindle motor.
Not those Mabuchi toy - like motors used in almost any other player including Sony and Phillips.
The shaft is not 2mm in diameter but 6mm. Much more stability.
Check page 40 of the service manual.
Sony also toutet the CDP-X5000 to have ruby bearings when it came to the market.
It is questionable wether the spindle motor is lubricated at all.
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Sorry, it is two seconds, but I get the impressions you abuse this thread.
You have not answered in detail of any of our arguments and
already proven that you do not read our messages carefully.
This is very annoying and not helpful to find a solution.
Apropos solution:
BA6297AFP, the IC driving the sled motor and tracking coil is also connected to the reset circuit (pin15,mute) that dacen examines.
You have not answered in detail of any of our arguments and
already proven that you do not read our messages carefully.
This is very annoying and not helpful to find a solution.
Apropos solution:
BA6297AFP, the IC driving the sled motor and tracking coil is also connected to the reset circuit (pin15,mute) that dacen examines.
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Then I advise you strongly to improve yours.
Quoted from Wikipedia:
"Scanning velocity is 1.2–1.4 m/s (constant linear velocity) – equivalent to approximately 500 rpm at the inside of the disc, and approximately 200 rpm at the outside edge.
(A disc played from beginning to end slows down during playback.)"
The CDP-X5000 needs about 1,5 seconds to speed up from 0 to 500 rpm and start playback.
2 seconds to travel from outer track to inner track (i.e. in repeat playback)
Once and for all:
This problem is not mechanical.
It will probably be a defective or poorly designed reset circuit or misaligned tracking gain.
Both can change parameters when the player warms up.
I have to explain what could be happening when the board is loose.
When a button is pressed, the board gets pushed and this pushes the board on to another button operating that function..
Gajanan Phadte
When a button is pressed, the board gets pushed and this pushes the board on to another button operating that function..
Gajanan Phadte
It just shows you always want to have the last word.
Rubbish!
Closest distance between button edges is 3mm (Small buttons) and 6mm (Big buttons).
All buttons are fixed by a rod and by the upper panel bores.
At least in this universe they can not interfere.
There is also nothing beneath the keyboard that could be touched and cause shorts.
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I wrote
I have to explain what could be happening when the board is loose.
When a button is pressed, the board gets pushed and this pushes the board on to another button operating that function..
READ AGAIN
I have to explain what could be happening when the board is loose.
When a button is pressed, the board gets pushed and this pushes the board on to another button operating that function..
READ AGAIN
Please, I wrote that this problem is not a problen of any CDP-X5000 worldwide.
Nobody needs to open the player
- even though it is only 4 screws to be removed, but do not forget to have the transport mechanism centered,
or the platter will be in the way when lifting the upper case -
because of misinformation.
What sticks into my eye is the fact, that many transistors are part of the reset circuitry.
Transistors change value according to temperature, but not dramatically.
But still a path to examine?
Was anyone able to check EF-Balance and PLL Frequency?
(Page 10 on Service Manual) Did not have the time to do this yet...
Nobody needs to open the player
- even though it is only 4 screws to be removed, but do not forget to have the transport mechanism centered,
or the platter will be in the way when lifting the upper case -
because of misinformation.
What sticks into my eye is the fact, that many transistors are part of the reset circuitry.
Transistors change value according to temperature, but not dramatically.
But still a path to examine?
Was anyone able to check EF-Balance and PLL Frequency?
(Page 10 on Service Manual) Did not have the time to do this yet...
Here is what I have modified so far. It remains to see how efficient this is. The transistor Q 601 has built in bias resistors, 4,7 kohm each. I have cut the track from D602 and taking the laser disable signal directly from pin 2,3 IC 602. This signal goes low after POR. I have removed JW600. Could not see the need for this one. I have taken JW602 and put it to ground instead of the input to Q601. I could not see the need for this connection. The lid switch is now on its own. And the laser has now got its own regulator. Hope is high again !! We will see.
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