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Accuphase DP-80 CD Not Reading
Accuphase DP-80 CD Not Reading
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Old 4th November 2018, 01:02 PM   #31
Salar is offline Salar  Germany
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Join Date: Feb 2006
Location: Germany
What lubricant do you use for the linear mechs?
I have the Panasonic lubricant RFKXPG671 at hand,
which might be silicone based: White grease, prone to heat,
it does not melt. I think it was made for CD sliding mechs but I am not sure.
The BU-1 mechs use bronze bearings for sliding, like many mechs of that time.
Normally, bronze bearings are oiled when being used in motors,
but oiling is connected to the high rotational speed.
So the grease mentioned should be sufficient for sliding?
All the best,
Salar
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Old 5th November 2018, 01:23 AM   #32
flyong is offline flyong  Singapore
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Join Date: Mar 2009
At first, I used the silicon based white grease for the lubrication, however its ended up the linear mechs gear got stuck by the grease which turned sticky and colour changed to yellowish after sometimes. Its jammed the gears and CD tray and caused the tray couldn't slide to open.

Finally, i changed the grease to oil based lubricant for bearing, its worked very well till now, so far so good.
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Old 5th November 2018, 11:48 AM   #33
Salar is offline Salar  Germany
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Join Date: Feb 2006
Location: Germany
Thanks for the answer! That the grease will become sticky seems not to
be likely with the Panasonic Lubricant RFKXPG671. I will use this.
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Old 17th January 2019, 09:45 AM   #34
rockeater is offline rockeater  Australia
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Join Date: Apr 2017
Location: Perth
I have just acquired DP-80L which does not read T.O.C.
The mechanism appears to work fine, the 3 microswitches visible from the top are good.
The laser hunts for CD, its power is OK (looks like 0.1mW on the Leader LPM-8000), and it spins the CD.
Further, there is some data on the EFM test point.
But the T.O.C. is not read and the CD just spins forever with what looks like correct speed (although I have not measured it in any way).
Anyone has a Service Manual or even some suggestions where to go from here?
Cheers
Roman
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Old 17th January 2019, 02:50 PM   #35
rockeater is offline rockeater  Australia
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Join Date: Apr 2017
Location: Perth
Another quick observation.
The laser travel control (servo) appears to be faulty.
The head seems to linger next to CD tray and does not travel back to the park position as is the case with many players employing Sony magnetic drive units.
When manually moved to the outer circumference of the CD, it will travel properly to read the lead-in track at the centre.
But will not go back to park position after power cycling, making just a short jerk motion towards outside and returning to the centre.
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