Denon DVD-3930 & DVD-2930 w/Realta T2 Chip Coming September- - Page 167 - AVS Forum | Home Theater Discussions And Reviews
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post #4981 of 4985 Old 05-19-2019, 03:23 PM
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ID'ing Laser for DENON DVD3930CI~~

Hi all. I disassembled my unit as far as i could, & stopped where there is a black cover protecting the laser assembly. There's way too many things not covered in ANY tutorial that explains how to get into where the laser sits, & an be either changed or ID'd for a part #. I need help, or a good tech. here in So. Florida. I would gladly pick up the parts, but I'm not even sure what I need. I already cleaned the laser, so that's out. Now I'm moving on & I need help.
Thanks everyone!
Kenny
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post #4982 of 4985 Old 05-19-2019, 03:31 PM
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Originally Posted by zozoe View Post
Hi all. I disassembled my unit as far as i could, & stopped where there is a black cover protecting the laser assembly. There's way too many things not covered in ANY tutorial that explains how to get into where the laser sits, & an be either changed or ID'd for a part #. I need help, or a good tech. here in So. Florida. I would gladly pick up the parts, but I'm not even sure what I need. I already cleaned the laser, so that's out. Now I'm moving on & I need help.
Thanks everyone!
Kenny
🕉
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post #4983 of 4985 Old 09-08-2019, 01:06 AM
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Hi folks! I picked up a used DVD-2930 unit, and of course it doesn't read disks. What I find curious is it doesn't detect any single disc I tried, neither CD-Audio nor CD-data (MP3) nor DVD-video (don't have DVD-Audio or SACD discs yet). It spins the disc irregularly for a long time and then gives up. The universal advice seems to replace the pickup, do you think it will fix my case as well?


This is definitely not a case of a dead laser (both of them at once? Seems unlikely). I suspect the focusing mechanism may be at fault, is it a known issue with these devices?
I checked the CD and DVD laser current, it was only slightly larger than the original values (3300-3400 vs. 2800-2900). The CD has 120 hours and DVD has 77 hours on it. The unit is in good condition and I really don't understand why it could fail this way...
I re-adjusted the current to the displayed new values and reinitialized the player, to no avail, of course.
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post #4984 of 4985 Old 09-10-2019, 08:09 AM
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Originally Posted by SundayAudiophile View Post
Hi folks! I picked up a used DVD-2930 unit, and of course it doesn't read disks. What I find curious is it doesn't detect any single disc I tried, neither CD-Audio nor CD-data (MP3) nor DVD-video (don't have DVD-Audio or SACD discs yet). It spins the disc irregularly for a long time and then gives up. The universal advice seems to replace the pickup, do you think it will fix my case as well?


This is definitely not a case of a dead laser (both of them at once? Seems unlikely). I suspect the focusing mechanism may be at fault, is it a known issue with these devices?
I checked the CD and DVD laser current, it was only slightly larger than the original values (3300-3400 vs. 2800-2900). The CD has 120 hours and DVD has 77 hours on it. The unit is in good condition and I really don't understand why it could fail this way...
I re-adjusted the current to the displayed new values and reinitialized the player, to no avail, of course.

It is easy enough and cheap enough (less than $20) to replace the laser assembly, I would try it. In my experience the laser current is not particularly useful in diagnosing this problem.
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post #4985 of 4985 Old 09-10-2019, 08:18 AM
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Fair enough, thanks. Basically, I wanted to hear your opinion on the matter, whether you estimate the chance of success below 50% or above 50% for my particular symptoms. I suspect the lens isn't focusing properly, if that's the case then replacing the pickup is likely to resolve the problem, am I right?
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