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CDJ-800 MK2 Takes around 20 minutes to warm up before reading CD's

Hey There,

 

I was wondering if anyone would be so kind to share some knowledge and assist me with repairing my Pioneer CDJ-800MK2. 

Unfortunately, I do not have the budget to have the player professionally repaired, nor can I afford another deck. I do, however, have a tonne of electronics experience, so replacing any parts is no problem here - I just need assistance with what to replace!

Diagnosis: The CDJ will refuse to read CD's (any type) for at least 15-20 minutes when initially turning the unit on. A year ago, it started at just a minute or 2 before it would start correctly loading and reading CD's, but the issue has worsened over time. When you put a CD in, it will try to spool before ejecting the CD again. I know that it can see the CD there because when inserting a clear placeholder CD, the deck rejects it without trying to spool, but with a real CD, I guess it fails to read the Lead In of the disk properly so it just rejects it. After a few attempts, it will eventually stop rejecting the CD, instead just choosing to freeze up until the disk is ejected. (showing just 0 Tracks, saying NO TRACKS, or showing an E error - [cant remember the error number])

After 20 minutes of so, it will begin to read CD's, and weirdly, it will continue to read any CD I put in thereafter, with no errors, skipping - just works as it should!

Now I have to turn the unit on, go away for 20 minutes, and come back before being able to use it.

I thought that this was a laser issue, so I bought a replacement laser from a licensed Pioneer distributor, and replaced the laser inside (was quite a task!). The unit still shows the same problems, waiting for 20 minutes before reading CD's.

I'm now out of ideas - could this be a power supply problem? Something wrong with the main logic board, an IC or a blown capacitor? If anyone could advise me, steer me in the right direction, on what to do next, it would be greatly appreciated!

Thanks in advance :)

 

-Mark

Mark Elmes

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6 commentaires

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??  I have not seen this occur so I can't really provide you with a solid answer.  Since we aren't allowed to break down gear here, I can't say more than contact Tech Support and see if they have any thoughts.  They may have seen this and can offer a solution.  Good luck. I will say if they make a grinding sound while warming it could be the internal playback arm and spindle assembly.

Jay 0 votes
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Hello. I also have this problem, I bought used CDJ800 MK2, and they reject CD's for the first 5 minutes after they are turned on. Later, everything works fine. And this happens for both of them. Did You manage to find any way to solve that problem?

Mateusz Kub 0 votes
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Hey there, yes I did manage to resolve the issue. Where I thought replacing the laser would work (it didn't) I was told that it could be another component of the disk drive, so I bought another spare cdj that had seen better days to use as a doner. After replacing the entire disk drive the problem still persisted. I ended up replacing the main logic board that controls the cdj, found on the underside of the unit under the silver panel. It was this that fixed my cdj, even with the original disk drive which I put back as it had the new laser. The logic board was what caused this issue. I hope this helps!

Mark Elmes 1 vote
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Thanks for Your response. I will send the CDJs to service today, and I hope they will have spare parts to fix it. I am only afraid, it may not be worth it's cost to repair....

Mateusz Kub 0 votes
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It was also the case with both my CDJ's.
Quite sad, because i paid 2000 PLN (~500 USD) for them, just to pay 1600 PLN for new main boards... No luck in contact with unfair seller :(

Mateusz Kub 0 votes
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OLAH Guys. I sad to heard your histories but in future, please, i had bad experiences... just buy at official Pioneer dealers with warranty.

Often, chiper DJ Set is finally leaving expensive.

Take care,

Pioneer DJ Forum support

Pedro_Blz 0 votes
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