Luxman L-80V fuse help

Discussion in 'DIY' started by corpblues, Jun 6, 2017.

  1. corpblues

    corpblues AK Member Subscriber

    Messages:
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    Location:
    DFW Texas
    I need some help. I picked up a Luxman L-80V amp from the original owner. He said he thought it might have a blown fuse when he connected speakers wrong. When I opened it up found 2 of the fuses were blown.

    I am not a tech but I could replace a fuse. He also said that he blew some fuses before and had someone replace them. Thus I'm not sure if it has the proper fuses installed or not.

    I don't see the fuse size in the owners or service manual. It is hard to see the numbers on the blown fuses I pulled out. One has 125V 5 and another has 5A250V. another fuse I pulled out I can't make out the markings but it was a curly wire fuse.

    On the fuse holder it has 6 fuses 3 of each type.
    The fuse holder board is marked with 0.2AT (with curly wire fuses) and 5AT (with straight wire fuses).

    Could someone advice me on the proper fuses to buy and install?

    If it blows the fuses again I will have it serviced but it is worth a try just replacing fuses first. I am confused why it would need a 250 volt fuse...
     
    Last edited: Jun 7, 2017
  2. macyjrm

    macyjrm AK Subscriber Subscriber

    Messages:
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    Location:
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    I don't know the fuse values for your model but 250 V rated fuses are common in Japanese and other manufacturers gear. Most of these designs are intended for the international market where 220v or more is common standard.
     
  3. Blue Shadow

    Blue Shadow I gotta get me a new title

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    F001, F601 and F602 fuse values are on the schematic that you can get from HFE.
     
  4. corpblues

    corpblues AK Member Subscriber

    Messages:
    600
    Location:
    DFW Texas
    Is it too risky to use a 500mA fuse instead of a 200mA fuse? 500mA is smallest my local store had.

    Thanks for the info regarding 250v reason, it makes logical sense to me now.
     
    Last edited: Jun 7, 2017
  5. macyjrm

    macyjrm AK Subscriber Subscriber

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    Amperage is the value you don't want to exceed when choosing fuses, so 500 is 2.5 X the original value and not a good idea.
     
  6. corpblues

    corpblues AK Member Subscriber

    Messages:
    600
    Location:
    DFW Texas
    Thanks. I will order the proper fuse. I did find inside the amp it is stamped to use 250V fuses.

    I took a risk and temporarily used an 500mA fuse and was happily rewarded to find the amp is fully operational. It is a great awesome sounding amp!
     
  7. slimecity

    slimecity Super Member

    Messages:
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    Location:
    New Zealand
    Dont be suprised if your fuses just blow again. It could happen. sometimes the fuses dont blow fast enough to protect the outputs, and these blow. You may be lucky however....
     
  8. Blue Shadow

    Blue Shadow I gotta get me a new title

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    Wouldn't a dim bulb power up with the new fuses be a prudent choice?
     
  9. macyjrm

    macyjrm AK Subscriber Subscriber

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    Location:
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    I'm glad it turned out well, but for those of you considering the same my advice is don't. Smoke is a more common outcome.
     
  10. corpblues

    corpblues AK Member Subscriber

    Messages:
    600
    Location:
    DFW Texas
    I've installed the proper fuses and all is well. Patience has never been my strong point. I should have waited but my theory was the amp was probably already damaged and needing repair, or I would get lucky and it was just a fuse.

    The prior owner stated he did it when hooked up some speaker incorrectly, whatever that means. Guess the fuses did their job and protected the amp.

    This Luxman L-80V amp sounds awesome. I have it connected to a pair of JBL 4110 monitors. I never cared for these speakers before but figured out why, the factory protective plastic was still on the speaker control and turns out it had come loose and caused buzing at volume. I removed the protective plastic and they sound great, this combo is incredible clear and refined. I bought it to fix and sell, but think I'll be keeping it. :thumbsup:
     
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  11. Bynem

    Bynem Active Member

    Messages:
    332
    Location:
    Maryland
    I think my old multi-voltage Luxman R-1050 had nine or ten fuses in it. I had to order those from MCM to get the right spec.
    My R-1120 is going back into my second system soon.

    Glad to hear the L-80V is working well.
     
  12. Blue Shadow

    Blue Shadow I gotta get me a new title

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    Location:
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    Ah yes, the AK way.
     
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  13. corpblues

    corpblues AK Member Subscriber

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    My family is hoping for a cure. Like that is going to happen. ;)
     
  14. corpblues

    corpblues AK Member Subscriber

    Messages:
    600
    Location:
    DFW Texas
    I've been driving it hard for a week playing tunes and it has not missed a beat. For the record, this is a great amp and has my recommendation.
     

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