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kgallen last won the day on April 4 2020

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  • Sony Products I Own
    MDS-JE520, MZ-R700 (silver), MDS-JE530, MZ-B10, MZ-NF610, MDS-E12 x5 (3 PRO, 1 bust), MDS-E10 x2 (1 PRO, 1 bust), MDS-JE440, MDS-JE480 x2, DHC-NX5MD, CDP-XE530, CDP-D12, MXD-D4 x2 Bust: MZ-R909, MZ-N510, MZ-R700 (gold)

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    Gloucestershire, UK
  • Interests
    Amateur theatre lighting and sound (live sound, music and sound effects). With MiniDisc I tend to be I interested in the decks - both Hi-Fi and Pro models.


  • Minidisc units
    As Sony list plus Tascam MD-350 / Tascam MD-CD1 (x2)

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  1. If it does play ok then the laser is good for read. If you try to record over a disc but that disc ends up blank, then the write laser power is ok but there is an overwrite head (or circuit) fault. If it won’t record as above then it’s hard to diagnose from a distance. If you’re not into diagnosing and repairing electronics then a replacement drive is the easiest approach.
  2. Sounds like a bad write head 😞 This is the small flappy arm that hovers on top of the disc and provides the magnetic field for writing the disc as the laser underneath heats the bits to the Currie point. Its not specific to just writing the TOC. You could check for obvious damage/wire breaks but repair may be down to finding a replacement drive from another machine. (Same drive in European MDS-JE510). Can you get a recorded disc to check the machine will read and play discs? Sounds likely as it can read a disc ready for recording. https://www.minidisc.wiki/equipment/sony/deck/mds-s38
  3. @sfbp I’ll send you a tub - I sent you that SPDIF splitter before, I don’t think that cost an arm and a leg (although times have changed!). Good idea @BearBoy 👍 Happy Christmas 🤣
  4. Don’t know. Looking up EM-30L it’s described: Lubricating grease developed for plastic components NLGI Grade 1 PAO based grease with a base oil viscosity of 90 cSt at 40C, lithium thickened, uses white solids and PTFE as solid lubricants. https://www.dupont.com/products/molykote-em-30l-grease.html Googling a bit, especially TapeHeads, some suggest lithium grease is not great for plastics. But commentary is divided. 😆
  5. Too much grease will just collect dust and make the OP stick so the less the better! That lead screw assembly is very close tolerance, it doesn’t need loads of lubricant. Good luck!
  6. 161 yes. Clean it if you can. Then a tiny amount of the Molykote with a cocktail stick. Ideally with the OP on the outer track (which should be easy in a portable as the OP isn’t usually ‘homed’ as it is in a deck). Then when the OP tracks back to the centre it should spread the grease along the worm gear. I’m not sure how much it will help though! Cleaning any hardened old stuff off is more important.
  7. I’d give it a bit of use before anything more invasive. Sorry can’t be of more use!
  8. Yea just cut the tracks and solder to the through hole pins of CN671 - possible since those traces don’t go anywhere else as you’ve spotted from the PCB layout. Pretty easy if you’ve got some solid core kynar mod wire like this: https://www.ebay.co.uk/itm/262293229036?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=cPqkJZIKSwG&sssrc=2349624&ssuid=nsjPidUXSvu&var=&widget_ver=artemis&media=COPY I’m still a bit bemused that the rotation is reversed!
  9. Your memory serves you well. (Don’t tell @sfbp I still don’t know what to do with it! 😆)
  10. @sfbp often speaks about both of these… I need to watch this for homework! Thanks @BearBoy!
  11. Fab! If you write something maybe you’d post it on the wiki too? Add a repair section on this page: https://www.minidisc.wiki/equipment/sony/deck/mds-w1
  12. Thanks for the update and info. That is weird. I wonder if Sony had a custom part made for some reason. I’ve suspected that before - the headphone volume control on one of my MDS-E10 or E12 didn’t seem to be a standard part. That mounts to the PCB to the side so the flat on the shaft needs to be at a different position to get the knob marker to line up between the min and max position. Also I couldn’t find the correct resistance (I can’t remember now if it was 1k or 5k). For @sfbp I think the ‘L’ is maybe low profile and the ‘R’ is probably ‘regular’.
  13. Well I was musing that but I don’t see that in the data sheets. For both, CW rotation suggests A pulses before B. But that’s looking on a phone. I really want to get the two data sheets up side by side to compare…
  14. Think the difference is the PEC11 has a bushing thread and the PEC12 is non-threaded.
  15. Interesting yours is ‘PEC11L’ and mine are ‘PEC12R’.
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