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In Reply to: RE: Replacement for Sony 213Q laserhead posted by akolegov on December 19, 2016 at 00:52:06
I Googled you model number and the images show the unit has tubes.
The 'classic' tube problem if they get old and are starting to fail:
"there is some intermittent noise during playback"
For preamp tubes (which IF you have tubes, they are preamp tubes) the real typical problem is they become noisy. IE start making some noise, but music still plays.
Whomever said replace the laser is not very smart about laser problems.
Lasers STOP WORKING, or you find it hard to start a disc, or the disc is always skipping..
But NOT noise while playing.. No way!! That is NOT a laser reading problem.
So IMO you should have a tube repair type person look at your tubes.
Follow Ups:
I brought a couple of Mazda OB2 tubes yesterday and replaced the faulty tube, but the problem (skipping) remains, though to a lesser extent. The CDP requires a thorough check.
I opened the lid today and saw the melted tube (WY2 voltage stalilizer, or, as they call it, power rectifier).
It appears that the tube exploded and smeared the socket. Luckily, the contacts were not affected.
I hope that the problem is with the tube, not the laser head...
I meant "stabilizer"...
It's an interesting idea - I swapped three pairs of 12AX7 tubes, two pairs of vintage tubes (Mullard and Mazda) and a pair of stock tubes, but it did not cure the problem. Perhaps, I used a wrong term ("intermittent noise"), but the laser really skips the disc and the sound gets interrupted.
Re tubes, in addition to two 12AX7 tubes, this player also has a voltage regulator (I don't remember its designation) and a rectifier tube. It is worth swapping a rectifier tube (if I manage to find one) and see what happens...
Another possible problem is the small part the CD lays on as it spins may have 'dropped' enough to make it difficult for the laser to read all discs. Often this is caused by trying out a CD dampening disc on top of a CD. Or accidentally inserting two CDs, or the CD is inserted crooked, so it jams.
It only takes ONE TIME to push down the spindle gizmo enough to cause slight problems.Take a disc you have a problem with, and place packing tape, or any sort of tape which you can later remove.. And place it so it raises the disc a tiny bit.
Many CDs have a raised circle (some do not) a inch of so away from the center. Place the tape or paper so it is only inside the raised area. (but so it also has the hole in the center left open.
Then the experimental CD will lay slightly higher.
If now it reads fine... Then the CD carrier may have fallen down the spindle a little.
MOST CD laser motor spindles have only a friction fit for the CD holder height.I have moved some up slightly to make a player work better.
The part the CD rests on needs only perhaps the thickness of two sheets of paper higher.. IF that is the problem.
I found it can be pried upward with any old screwdriver, if one is careful.
Or you can place a permanent 'lift' over the motor CD contact area.
Again, only the thickness of a piece of writing paper or two should do it.
Edits: 12/24/16
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