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Fuses on SC500

Discussion in 'Roland' started by cavrom, Mar 4, 2013.

  1. cavrom

    cavrom New Member

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    Mar 3, 2013
    Does anybody knows where are printhead fuses for Roland SC500?
    Thanks
     
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  2. sarasotasignmachine

    sarasotasignmachine New Member

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    Feb 6, 2013
    fuses

    I have read the service manual front to back several times as we just recently got the same machine I have not seen anything about fuses if you google roland sc500 service manual it is a free download you can also get the users manual we completely refurbished all the printing side of the printer if you have to get new parts I recommend getting the the mamaki pump and the mutoh capping station to eliminate problems with inks and sponge swelling ... in box me if you like i have learned alot about this printer because i had to ....
     
  3. FrankW

    FrankW Very Active Member

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    There is no official spare "fuse". Because they are soldered it looks like that roland expects the customers to replace the board.

    I don't know exactly where the fuses are on this machine, but if you could take a photo of the area around the connectors of the head cables, I perhaps could identify them.
     
  4. anozira02

    anozira02 Member

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    I am having print head issue on my Cj-500 as well,,, I emailed Kent, at MacMedia who has been repairing these boards for a while now, Kent offered to look at the Main board and replace the chip, or chips needed to get it going again, hes price is 199.00 plus shipping.. Kent said that a combination of head drivers and resistors need to be looked at...
     
  5. Alpha Star

    Alpha Star Member

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    Yeah, Kent fixed my head board on my LEC-300. I'm about to send him my SP-300i main board too. He knows what he's doing. Send him the board and he and Tom will fix it up for you.
     
  6. cavrom

    cavrom New Member

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    Mar 3, 2013
    Thank you all!!! The only problem can be that I am on a different continet :))
    And I really don't know if ALL the mailing companies knows the word FRAGILE :/

    I will preserve the offer like a plan B. Maybe is possinle to take a foto to my main board and to send it to you and you can show me what circuits and/or resistors, diode or whatever I must change.

    It is an valid option?

    Thanks a lot!!!
     
  7. Alpha Star

    Alpha Star Member

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    I say go for it... take a pic :)
     
  8. cavrom

    cavrom New Member

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    Hello ppl,
    I put into a pdf some photo's of the main board.
    It seems like the 142 and 144 resistor are burned.

    Someone can tell me if there are the only ones? Or is possible to be also other components burned?

    Thank you,

    A.
     

    Attached Files:

  9. kanini

    kanini Member

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    The capacitor marked 181 I think looks suspect, it looks like it's leaked something brown, in the upper right corner. But it could be just the picture also...
     
  10. Alpha Star

    Alpha Star Member

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    I... do not see fuses :( Although, a likely thing to cause your problems is transistors. Those are the black things along the right side. They're attached to the big heat sinks and the have three prongs each. Make sure you read the type printed on each one. Any that have the same type should all test the same way if you test the resistence in all three possible combinations of the three prongs.

    Did you test those resisters with an ohm meter? Or they just look bad?

    I think this board needs to be sent in for repairs. If I were you, I'd head over to Macmedia.com and start following their instructions.
     
  11. MrSalumi

    MrSalumi Member

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    earth
    So are these the transistors?
     

    Attached Files:

  12. anozira02

    anozira02 Member

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    I agree with Alpha,, if you worry about packaging up your board,, first place the board into an antistatic poly bag, wrap it with some type of thin foam,, place it in small tight box then place that box in a larger box with popcorn foam, should be good to go...
     
  13. Alpha Star

    Alpha Star Member

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    Yep.
     
  14. cavrom

    cavrom New Member

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    Mar 3, 2013
    some kind of news...

    Hy ppl,
    flash news... I took out the board from the printer and I extract the resitors and the transistors.
    4,7ohm resistor is fried, 2ohm rsistor is not, but looks bad.
    both transistors (PNP and NPN) have short-circuit between E and C, so they are gone.

    I ordered some new transistors and I am waiting to receiv the pack from UK.

    I am wondering if also the other pair of transistors (same like theese ones), but with good resistors on their E, are fried or not. As far as I know, all 4 transistors are into so called "H bridge". Usually the bridge gets fried on diagonally... Any specialist here to help?:)

    Thank you...
     
  15. cavrom

    cavrom New Member

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    I looked well on it... It seems like a brown glue...
    Anyhow, the electrolitic capacitor doesn't leak this way, and if something was leaking nearby, the result wasn't in upside, but downside...
     
  16. anozira02

    anozira02 Member

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    the number 181 on the board is a inductor and rarely goes bad, most often resistors are the bad guys,,
     
  17. cavrom

    cavrom New Member

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    Mar 3, 2013
    again...

    Hello,
    I just changed the transistors (only a pair was burned), I soldered new ones. Also I changed the resistors.. BUT STILL NOTHING :(( :frustrated:

    Now it seem that everithing is ok, but still not working...
    I asked arround and I receive the same answer: "check the fuses". Where are the damn fuses???? It is possible nobody to know this???

    :covereyes:
     
  18. anozira02

    anozira02 Member

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    I don't get it! if everything is ok, how come it's not working not? Tell us what's going on,, does your printer come online at all,, getting any error messages, does the carriage scale the distance and so forth..
     
  19. cavrom

    cavrom New Member

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    Mar 3, 2013
    As I told you, the printer goes online, do all the test's and scale the role...
    Also the printer cut on test, and move the heads on print test... But NO INK.
    Printheads new, dampers are new, pump new also.
    I see the ink flow trough tubes when the printer do the cleaning.

    I changed the transistors and resistors but still not printing...

    I saw on ebay that someone sells sc500 printhead fuses... But I cannot identify where are...

    A.
     
  20. deegrafix

    deegrafix Member

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    This probably isn't very helpful but I have a CJ500 and several years ago I replaced a fuse that looked like an old fashioned auto fuse, clear glass with metal ends. Got the replacement at Ace hardware. It's about an inch long. I can't remember where it was and am not inclined to take mine apart right now to see, but it wasn't a difficult spot other than being under the main housing somewhere. (My memory gets worse every year, lol.) I remember being freaked out after all the $$ I put into it and then the happy dance that it was a cheap little fuse from Ace. TG this machine has worked flawlessly for over a year and hasn't been in peices lately! Knock knock.
     

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