PhL Posted November 3, 2013 Report Share Posted November 3, 2013 Hello, has anyone any idea ? Is there one or two lasers ? I tried 3 non recordable discs which play OK... None of the recordable discs I tried did :-( ! Or is it the sensor that detect the type of disc ? TIA, Regards, PhL Quote Link to comment Share on other sites More sharing options...
sfbp Posted November 3, 2013 Report Share Posted November 3, 2013 Different technology for CD's compared to MO (recordable). In adjustment there's a different routine for each. It's still possible that the adjustments can be made. Unfortunately, you have to find someone with a laser power meter to be sure. Quote Link to comment Share on other sites More sharing options...
freddyjollo Posted November 3, 2013 Report Share Posted November 3, 2013 will it record? Quote Link to comment Share on other sites More sharing options...
PhL Posted November 5, 2013 Author Report Share Posted November 5, 2013 Different technology for CD's compared to MO (recordable). In adjustment there's a different routine for each. It's still possible that the adjustments can be made. Unfortunately, you have to find someone with a laser power meter to be sure. Thanks for the suggestion... Do you mean the hole in recordable discs is not used by the device to select some parameters ? I could use an old recordable disc in my working JB730, filling the hole to see whether I have C13 or not... PhL will it record? When you enter the disc, it makes some noise then send it back out after about 5 seconds :-( ! PhL Quote Link to comment Share on other sites More sharing options...
PhL Posted November 8, 2013 Author Report Share Posted November 8, 2013 Hello, I did try on the JB730 with a recordable disc with the "record hole" masked to fake a CD minidisc... I got the same C13 Read Error message ! So I will try to find why the hole detection is no more working on the JB980. I could probably force the MO mode as I only have two minidisc of the CD type ! Any further idea ? PhL Quote Link to comment Share on other sites More sharing options...
punkrockaddict Posted November 8, 2013 Report Share Posted November 8, 2013 A Fact is that with recordable MInidiscs (Low Reflection Type) the Laser needs 0,8mW to read. For pre-recorded (High Reflective Type) it only needs 0,4mW. Pre-recorded do have pits and lands as a usual bought cd has other than recordable have.It is a different kind of "reading" the disc I have had a NH900 with the same behaviour.I couldn´t fix it.. Try to look in the service menu what error codes are stored.That´s afaik all you can do at first instance. Hope this explains as much as it should Quote Link to comment Share on other sites More sharing options...
sfbp Posted November 8, 2013 Report Share Posted November 8, 2013 Hello, I did try on the JB730 with a recordable disc with the "record hole" masked to fake a CD minidisc... I got the same C13 Read Error message ! So I will try to find why the hole detection is no more working on the JB980. I could probably force the MO mode as I only have two minidisc of the CD type ! Any further idea ? PhL But that's backwards from what you expect. You have a drive that refuses to read MO disks. Whether or not another drive will or will not read MO disks that you purposefully modified is mostly irrelevant, since different laser power and different decoding circuitry (I think but not 100% sure) is involved anyway. If you think you can find and unjam the microswitch that senses the hole, by all means go for it. Quote Link to comment Share on other sites More sharing options...
PhL Posted November 9, 2013 Author Report Share Posted November 9, 2013 I found two switches ! One blue for "recording allowed" and one white for "recordable medium"... The white one definitely shorter than the blue one ! Could anybody confirm ? I pushed 30 (?) times on both of them ! Then the recordable discs were read OK :-) ! I also look at the error codes before clearing them... It was alternatively C20 and C51 i.e. 20 Timed out without reading the top of PTOC 51 Focus NG occurred and overran Thanks for everyone help !! PhL wondering how long the repair will hold Quote Link to comment Share on other sites More sharing options...
sfbp Posted November 9, 2013 Report Share Posted November 9, 2013 I expect that a very tiny amount of silicone grease might help. You have to be careful that there is not enough to smear all over your inserted disks. Well done! Quote Link to comment Share on other sites More sharing options...
PhL Posted November 19, 2013 Author Report Share Posted November 19, 2013 Thanks to all ! Hopefully, the NH900 user can try in this direction... Quote Link to comment Share on other sites More sharing options...
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