Sony DD portables genealogy

Discussion in 'Chat Area' started by Emiel, Aug 15, 2021.

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  1. Valentin

    Valentin Well-Known Member

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    No, I was reffering to the 3 versions of the heads: pointy, 35711 and 35712 permalloy. Will edit the wording for more clarity.
     
    Valentin, Aug 9, 2024
    #161
  2. dotneck335

    dotneck335 Active Member

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    Does anyone know the WM-D6C serial numbers affected by the Dolby circuit changes specified in Supplement 1 (January 1985)?
     
    dotneck335, Aug 9, 2024
    #162
  3. Emiel

    Emiel Well-Known Member S2G Supporter

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    Good findings, but are they conclusive to make updates to the table? Let me know, happy to improve the overview!
     
    Emiel, Aug 9, 2024
    #163
  4. Mister X

    Mister X Moderator Staff Member

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    Found over on Pinterest


    upload_2024-8-16_12-10-21.png
     
    Mister X, Aug 16, 2024
    #164
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  5. Mister X

    Mister X Moderator Staff Member

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    upload_2024-8-16_12-33-11.png
     
    Mister X, Aug 16, 2024
    #165
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  6. dotneck335

    dotneck335 Active Member

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    Here's what I have gathered so far on the Sony Walkman D6C history (updated 8/30/2024). This is from postings on stereo2go, tapeheads, and for sale listings on eBay:
    • February 1984: Sony Walkman WM-D6C released. Amorphous "pointy" PA259-3602A head marked "Japan". Brown/green phenolic PC boards 1-611-494-11 with through-hole components.
    • January 1985: Supplement 1 notes Dolby chip change from CX20068 to CX 20218, as well as surrounding component value changes. PCB now -12. Serial #s affected are unknown
    • Change from pointy head to rounded amorphous head 35711 between serial # 71236 and # 72264. Date unknown
    • 1988: Change to Dolby sticker color from white (silver) to black between serial # 114373 and # 117947
    • March 1994: Supplement 2 (serial # 267201) notes change to green glass epoxy PCB 1-651-545-12 with SMD components.
    • April 1996: Service Bulletin 395 issued. The motor was changed from X-3305-830-1 to X-3370-805-1.
    • April 1999: Supplement 3 shows two resistor values were changed in the French model.
    • June 2001: Supplement 4 shows main PCB changed to 1-651-545-14; motor drive servo circuit redesigned with servo IC now CX069A. Service manual was issued as Rev. 1.1.
    • Change to permalloy head 35712 in serial #s ~50xxxx and above. Marking "amorphous head" on the case is no longer present.
    • 2002: WM-D6C production discontinued
    Please update the genealogy table. If anyone has additional information, PLEASE POST IT.
     
    Last edited: Aug 30, 2024
    dotneck335, Aug 16, 2024
    #166
  7. Emiel

    Emiel Well-Known Member S2G Supporter

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    The first update of 2025!
    We now have 645 models on the site that are publicly available!
    The PDF overview of the first post, was made interactive and now links to models that are on the site.
    See for yourself by following the link to the news article: https://walkman.land/news/sony-disc-drive-overview-available
     
    Emiel, Jan 29, 2025
    #167
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  8. Chris_D

    Chris_D Active Member

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    Great work!
     
    Chris_D, Jan 30, 2025
    #168
  9. Mister X

    Mister X Moderator Staff Member

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    I don't know if I've seen this brochure posted yet? It looks like it's dated 4/84 and appears to be a salesman's guide for the new "C" Version.


    upload_2026-2-9_12-40-56.png upload_2026-2-9_12-41-52.png
     
    Mister X, Feb 9, 2026
    #169
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  10. dotneck335

    dotneck335 Active Member

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    What is the difference (if any) between this model (TC-D6C) and the Walkman WM-D6C?
     
    dotneck335, Feb 9, 2026
    #170
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  11. Mister X

    Mister X Moderator Staff Member

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    Good question, I didn't notice that!

    Either the marketing/printers didn't do a test print or Sony was going to do a "TC" Version. I think "TC" traditionally, for Sony, stood for portable tape decks using some of their early cutting-edge engineering, maybe they wanted one version for professionals, and sold by the professional sound companies followed by the prosumer "WM" Model stocked at your local camera shop.

    Personally I don't know when they dropped "TC" and what the last model was.
     
    Mister X, Feb 10, 2026
    #171
  12. Mister X

    Mister X Moderator Staff Member

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    Our friend over on X @akiraa _tanaka recently posted this rarity


    upload_2026-3-17_15-49-51.png upload_2026-3-17_15-50-4.png


    upload_2026-3-17_15-53-15.png
     
    Mister X, Mar 17, 2026
    #172
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  13. Emiel

    Emiel Well-Known Member S2G Supporter

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    Emiel, Mar 17, 2026
    #173
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  14. Mister X

    Mister X Moderator Staff Member

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    I checked over there and didn't see it in the advertisement photo listings?
     
    Mister X, Mar 17, 2026
    #174
  15. Emiel

    Emiel Well-Known Member S2G Supporter

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    That is correct, we also link to PDFs. You can find the catalogs and brochures here per model:
    IMG_2443.jpeg
     
    Emiel, Mar 17, 2026
    #175
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  16. Emiel

    Emiel Well-Known Member S2G Supporter

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    Meanwhile we added 20+ patents that also show up in the documents list @Machaneus . Designers are now available as normal tags, we are still working out a better way to make them stand out.
     
    Emiel, Mar 17, 2026
    #176
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