SilverGreen93 Posted June 6, 2020 Report Share Posted June 6, 2020 On 5/25/2020 at 10:54 PM, sfbp said: Ok well done with that - certainly can't hurt. My own experience with the featherweight E909 was that I had to fiddle with it several times to get it back together perfectly, but when I did, the (resulting?) lack of mechanical resistance means that the battery lasts forever, as it should with that model. I think maybe time to do some adjustment. You'll mainly need a regulated powersupply capable of sourcing exactly 1.2 volts (the minimum acceptable voltage for gumsticks).Once you have all the electrical checks done, then you can try the self-alignment routine, if that didn't make the difference. I cleared the NVRAM, performed the electrical adjustments, item 764 (V1PWM) was 2.28V instead of 2.30V. I adjusted it successfully to 2.30V, but now I have a bigger problem. I cannot pass the automatic CD adjustment anymore, it gives me 324 NG 00 0 00 error, which from my understanding is traking error. The manual recommends to perform the laser check and set the LrefPw, HrefpW and WritPw, but I don't have any laser power meter to test the power. Also, the temperature compensation value that I set is always reset to default for whatever reason I don't get even if i press pause to save the values. Bottom line: I cannot use my MD anymore, it now always enter test mode on powerup because the adjustements are not completed. Can you or anyone help me complete the adjustmnets to make it work again? A thousand thanks! Edit: How in the world should I measure the voltage drop on the R521 resistor during laser power adjustment when the resistor is just on the other side of the pdb when assembled toghether? Are they nuts for putting it on the other side? Edit2: Can anyone with a MZ-R700 tell me the values for the above settings to get mine working again? Quote Link to comment Share on other sites More sharing options...
sfbp Posted June 6, 2020 Report Share Posted June 6, 2020 Still sounds mechanical to me. The CD test is by far the least demanding, and if it fails (I assume you tried it before and it worked) there's something seriously wrong. Quote Link to comment Share on other sites More sharing options...
SilverGreen93 Posted June 6, 2020 Report Share Posted June 6, 2020 7 minutes ago, sfbp said: Still sounds mechanical to me. The CD test is by far the least demanding, and if it fails (I assume you tried it before and it worked) there's something seriously wrong. Well, the self-calibration tests were working before I reset the nvram. I now need somehow to get the laser power back to normal to pass the tests, doesn't look mechanical to me. Maybe the write was failing previously due to the low voltage on the laser and now after I get the calibration right it will work. The problem for the moment is that i cannot make sure the laser power is good to pass the self-calibration. Quote Link to comment Share on other sites More sharing options...
sfbp Posted June 6, 2020 Report Share Posted June 6, 2020 "reset the NVRAM" is actually a misnomer. All they did, when you pushed the 911 emergency panic button was to reset a single byte in memory. Emphatically the NVRAM was not cleared. The laser power settings will not have been touched. All you did was to force a calibration. My deduction is (FWIW, free advice is worth what you pay for it), you are having a similar issue to myself with the player I mentioned, that somehow things are not moving right. It turned out to be absolutely tiny variations in how I tightened the relevant screws when re-assembling. I'm curious, just how far did you strip it down? Quote Link to comment Share on other sites More sharing options...
SilverGreen93 Posted June 6, 2020 Report Share Posted June 6, 2020 I took apart only the main pcb, did not diassemble the optical pickup, so far so I could reach the test points to measure the voltages and lubricate the mechanical parts and rails. Quote Link to comment Share on other sites More sharing options...
sfbp Posted June 6, 2020 Report Share Posted June 6, 2020 Well for it to fail the CD test something is seriously wrong. I've almost never seen the CD test fail unless I mis-assembled it. YMMV, of course, no offence intended. Quote Link to comment Share on other sites More sharing options...
mikee72 Posted July 1, 2020 Report Share Posted July 1, 2020 @SilverGreen93, you might want to have a look at https://www.minidisc.org/sony_mzr_reset.html Quote Link to comment Share on other sites More sharing options...
sfbp Posted July 1, 2020 Report Share Posted July 1, 2020 Nope. That has nothing to do with the R700 (and related, contemporaneous models). By RXX I understand R35, R50 etc. Quote Link to comment Share on other sites More sharing options...
JawnPolygon Posted October 12, 2021 Report Share Posted October 12, 2021 i registered just to post my thanks for your tutorial, pureangst. i got my mz-n1 recording again. Quote Link to comment Share on other sites More sharing options...
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