Pioneer 100 disc CD player problems

This unit was given to me with the complaint that it would intermittently "skip". I did confirm this to be so and I subsequently slightly increased the setting on the laser pot. The unit seemed to be OK after that and I put it away for several months. I now have a use for it and got it out of the closet and loaded it up with CD's only to find that its doing the same thing once again. The strange thing is that some CD's seem to be affected worse than others. In fact some CD's will play fine and others have skips many times in the same places on the same particular disc when repeated plays are attempted, while other discs are not recognized at all. There are random skips at times on some CD's as well. I know that some CDR's could be a problem with some older machines and so we are not attempting to play any of those. I was hoping to note the particular CD, track, and time into the recording and if there was failure repeatability, use that to determine if my adjustments solve the problem but I don't know if this method would work or not. Does anyone have any opinions on that? Could some sections of a CD be harder for what I'm assuming to be a weak laser to "see" than others? Can someone please explain this phenomenon to me? I'm going to try to tweak this thing again but I would just appreciate a better understanding of this. Thanks, Lenny

Reply to
klem kedidelhopper
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Check for dust in the optics. Sometimes you can luck out adjusting a laser by the seat of your pants, sometimes not.

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Reply to
Meat Plow

Skipping can be due to a deteriorating laser diode. I would see about replacing the assembly.

Reply to
William Sommerwerck

Spindle motors on Pioneers also cause skipping. Check the RF output with a scope to see if the out put is at the right level and the "eye" looks sharp. If the level is correct and eye is sharp, I'd lean toward the motor being faulty. Chuck

Reply to
Chuck

Funny, I feel exactly opposite. I've replaced far more Sankyo, Sanyo, Toshiba, Canon micro motors in warranty repair than Pioneer. Maybe it was just the stuff I was working on but Pioneer was a covered item.

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Live Fast, Die Young and Leave a Pretty Corpse
Reply to
Meat Plow

Hi!

Interesting. All of my Pioneer disc changers (except one, a RadioShack branded unit) have developed faulty spindle motors. One has a motor with a dead spot, all of the others seemed to be the result of crud build up inside that would partially short the motor.

They're all of various vintages, the oldest at 1990 and the newest from 1999.

William

Reply to
William R. Walsh

Hi!

Interesting. All of my Pioneer disc changers (except one, a RadioShack branded unit) have developed faulty spindle motors. One has a motor with a dead spot, all of the others seemed to be the result of crud build up inside that would partially short the motor.

They're all of various vintages, the oldest at 1990 and the newest from 1999.

William

Reply to
William R. Walsh

Can't fault the motor for failing due to crud unless the crud was from the motor itself.

--
Live Fast, Die Young and Leave a Pretty Corpse
Reply to
Meat Plow

Spindle motors were a common problem on most of the multiplayers that Pioneer produced, and the lasers were extremely reliable. However, as I recall, the 100 disc player uses a later deck assembly, and I have had a few of those develop faulty lasers

Arfa

Reply to
Arfa Daily

Hi!

I can't think of anywhere else the crud would have come from...my house isn't immaculate but it's not too dirty either. And all of these players live in different environments--one is even in a different building entirely.

The six disc player (oldest of the bunch) was purchased in 2001 with the problem already evident, so you can't blame my housekeeping for that! :-)

William

Reply to
William R. Walsh

The problem is the drive voltage/current....

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Reply to
Samuel M. Goldwasser

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I guess that I could monitor the voltage at the motor terminals while playing a CD and see if it varies during a skip. Other than that in light of what everyone has said regarding the possibilities here how would I reliably rule out a motor or laser as the culprit? Lenny.

Reply to
klem kedidelhopper

In my experience, the only way to *reliably* rule out either, is by substitution. Not very technical, and not, I'm sure, what you probably want to hear. All I would say is that on the older Pioneers that tend to use a deck installed upside down, spindle motor trouble is usually characterised by slow running with sometimes an accompanying 'squeal', or a failure to start the disc rotating unless you 'help' it. Skipping or general poor playability, is normally down to either the deck suspension rubbers, or wrong setup, including the laser output which, contrary to almost any other laser, is actually included in the setup instructions. I have found it

*extremely* rare to get a laser which is genuinely faulty itself - unless of course, you include the well known 'lens fallen out' syndrome ...

On the other hand, the later lasers fitted into the multiplay 'jukebox' machines that employ a deck mounted vertically, I have had trouble with, and over the years, I have had to replace several.

Arfa

Reply to
Arfa Daily

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