chartz

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  • in reply to: Strategy for Changing Capacitors and Trim Pots on FM Tuner #9449
    chartz
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    Oh yes, this was solved and documented!

    You’ll need more than an oscilloscope, like a HF generator, a distortion meter…

    in reply to: Thank you Beoworld contributors! #9445
    chartz
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    Hi,

    This is something we have done here for a long time. Since 2009 AFAIC, even if the workbench is not exactly what it used to be.
    Always glad that what we have done over the years should still be useful to someone like you!

    A certain Dillen fellow of this parish is responsible for much of it, by the way! 👍🏻👍🏻👍🏻 I for one learnt a lot from him and from a certain M. Jarman about B&O ☺️ (and from many others too obviously).

    Jacques

     

    in reply to: Beogram 8002 stops short #9380
    chartz
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    I remember I had to replace the IR diode in one of my decks. An easy task, if it comes to that!

    in reply to: Beogram 8002 stops short #9337
    chartz
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    Hi,

    This should be in the Workbench, where it’s really at as regards repairs.

    Check your connections, and the bulbs, especially the one in the control panel, and if good, check adjustment as per service manual (5-3).

    in reply to: Beomaster plastic trims veneering #9295
    chartz
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    I’d say fair. Will do better next time! A bit teck oil and final polishing will finish it off nicely.

    402BCB79-0394-43F1-BB55-D979B1D43808

    ED8DA8D7-5E4C-4746-BDA5-22432F08E921

    in reply to: Beomaster plastic trims veneering #9266
    chartz
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    Hi,

    There are no corners here. Same with the BM 8000, the plastic pieces take care of the angle, and that makes the task much easier!

    The Beogram is more difficult!

    There is a special tool for that mind you.

    • This reply was modified 2 months ago by chartz.
    • This reply was modified 2 months ago by chartz.
    in reply to: Beomaster plastic trims veneering #9262
    chartz
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    First trim done.

    The old veneer peels off easily when heated with an iron. Then white spirit removes the old glue residue.

    Will do the cheeks later!

    This Beomaster has now been working for many hours a day for the whole week. No issues noted, and I keep being amazed at how sensitive the tuner section is.

    7C9CB3C9-5F17-41E8-9FB4-BF2E9E35543738C0478B-A114-4827-8F99-CE3CECC184D3

    in reply to: THE BEOWORLD AUTUMN 2022 PRIZE DRAW !! #9234
    chartz
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    Indeed ☺️

    in reply to: Strategy for Changing Capacitors and Trim Pots on FM Tuner #9150
    chartz
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    They can’t go bad but resistors and caps may change values and re-alignment required anyway, even when the device has never been touched. Sometimes especially if the tuner was never revised!

    Some tuners never get misaligned though, and that’s impressive. I have a Beomaster 5000 (1967) that still has its original components and settings and it works perfectly.

    I bought two FM3’s of the same period, one had its IF completely out and the other was still perfectly aligned. That’s pretty unpredictable.

    Now some designs rely more on trimpots than others.

    in reply to: Strategy for Changing Capacitors and Trim Pots on FM Tuner #9147
    chartz
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    Radio alignment is difficult and requires a lot of experience, even with the proper tools.

    I for one won’t touch it with a barge pole ☺️

    The only thing I do is the adjustment of 19 kHz frequency.

    in reply to: 5500 CD Player logic board wanted #9142
    chartz
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    And I might add that if the thermal fuse melted, you have to find the cause of that on the main board.
    A shorted cap, diode… investigate. Something I still love doing, even though my abilities decline little by little. Enjoy.

    in reply to: Beomaster plastic trims veneering #9131
    chartz
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    Hi,

    Thanks.

    I do remember Craig’s job. The 4400 is all chipwood though.

    The tricky part will be to cut it on the edges of the plastic trims.
    I intended to glue the raw veneer to the plastic and cut it along afterwards.

    I also have a Beomaster 8000 to do, one found in a scrapyard that I saved and which actually works. So if that works I’ll do it too.

    • This reply was modified 2 months, 1 week ago by chartz.
    in reply to: Beomaster plastic trims veneering #9122
    chartz
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    Thanks John. What do you use then?

    in reply to: Beomaster 1900-1 stand-by fault [solved] #9112
    chartz
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    in reply to: Beomaster 1900-1 stand-by fault [solved] #9014
    chartz
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    Hi,

    Usual stuff… done 😤

    This 1900 type 2903 is not the most cleanly executed, as regards PCB. Lots of solders still had a lot of flux around. The later 1900-2 was much cleaner. Looks original too. Someone had indeed been there before but wasn’t up to fixing it (as usual, touch panel not correctly mounted, etc).

     

    FDD4FECE-6E8B-4541-8F99-1C6364D8D43A

    Now looking for someone to veneer the trims. The previous owner just removed it from the front, advertising it as mint 😕

    346CB441-DF2B-4FC0-89EF-1A6C4B09BA9A

    Unless someone here has new or mint ones, that is!

    Martin, how come you haven’t come up with a re-veneering service yet? 😋

    Edit: is that why there are so many white ones? 😉

    Jacques

    in reply to: 5500 CD Player logic board wanted #8999
    chartz
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    Chances are that the transformer’s thermal fuse has had it. Do test that first.

    Maybe the board is still good.

    in reply to: Turntable is in good cosmetic condition… #8998
    chartz
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    Ha ha! 😂

    in reply to: 5500 CD Player logic board wanted #8986
    chartz
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    Hi,

    Can’t you repair the one you have? It isn’t rocket science!

    in reply to: BeoGram 1000: alternative RIAA PreAmp ? #8949
    chartz
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    Hi,

    Yes to all! Except for 5 ☺️

    Even 2.2 µF will do.

    • This reply was modified 2 months, 2 weeks ago by chartz.
    in reply to: Beomaster 1900-1 stand-by fault [solved] #8860
    chartz
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    Remember guys when we posted all those repair threads back in the day?

    Have people just lost interest?

Viewing 20 posts - 21 through 40 (of 110 total)