NGY Posted May 15, 2016 Report Share Posted May 15, 2016 UPDATE: I have changed the original title "MDS-JE510 Disc Error" of this thread. I intend to collect my C13 Disc Error cases into one topic. * * * * MDS-JE510 What a silly error I faced today... Yet another 510 that came with the known troublesome load/eject. I have already fixed half a dozen of 500 or 510 with this problem (or sudden switching on from standby, or disc error upon loading a disc - as these all root in the same issue), so I performed the usual routine (fairly straightforward fix, but requires a complete strip down of the drive, and some delicate repair work on miniature parts). When completed, I put the drive back into the deck and powered up. Upon inserting a disc, I heard it spinning up, so far so good. It tried to read the TOC a couple of times, changing revolution and seeking OP, but then it spat out the disc, again with "DISC ERROR". OK, let's check the laser I thought, but both the settings and the measured mW values were spot on. Then I checked the error rate, and it was very high - increasingly higher in the MID and OUT ranges, that called for a deeper inspection. I removed the lid to take a look at the drive. It became obvious, that the disc hit up and down quite a bit, ~2 mm on the edge. I thought it was my much (ab)used test disc. With a known good disc, the same happened. First I suspected the axle of the spinning motor, whether it got bent once the last disc the deck had eaten, was pried out violently. But the shaft was running true. After trying several discs, and most of them got ejected with the error, I took a closer look at the magnetic hub that holds the disc in place, and found this: a little bulge, probably some burr left by injection molding of the part. Once I cut this little piece of plastic off, discs began running way smoother After properly adjusting the traverse and focus bias I rebooted the deck, and voila, no more disc error, and it plays/records as it should. But what bothers me, how on earth this deck had worked so far at all? Or, is it that the laser tracking/focusing mechanism did compensate for the rocking discs, but only until it got somewhat "tired"? . Quote Link to comment Share on other sites More sharing options...
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