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eum
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Last Activity: 03-13-2024, 06:56 PM
Joined: 09-21-2021
Location: Toulouse
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  • eum
    replied to PSU Board repair or replacement Ecler Nuo 2.0 DJ mixer
    in Troubleshooting Audio Equipment
    I think you should check that your mainboard isn't short-circuit to prevent killing your brand new somewhat expensive PSU.
    You can measure the resistance between the pins on each power connector.
    Each has 3 pins with the ground in the middle.
    If any combination of 2 pins display 0.0Ω for more than a few seconds, it means it is shorted and you have to fix the mainboard first before applying power again.

    Hope this helps,
    Good luck
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  • eum
    replied to PSU Board repair or replacement Ecler Nuo 2.0 DJ mixer
    in Troubleshooting Audio Equipment
    Hi,

    I actually found a complete mixer with working PSU for less than the price than the new version you shared. (I could fix the mixers' output board quite easily, but otherwise it would have made me a good PSU source.)

    It seems there have been plenty sub-versions of those PSUs.

    What black SMD caps are you talking about ?
    (The little squares you show on your picture are in fact resistors, and the number on it codes for the resistance in Ohms : 1211<>121x10¹=1210Ω, 4753<>475x10³=475000=475kΩ.)

    I've recently heard that mains...
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  • eum
    commented on 's reply to PSU Board repair or replacement Ecler Nuo 2.0 DJ mixer
    in Troubleshooting Audio Equipment
    It seems the mixer cant operate powered by +/-15V instead of the original +/-18V.
    If so there are several power supplies available, of which some are shielded.
    I'll do some tests and update soon.
    See more | Go to post
    Last edited by eum; 01-03-2024, 06:37 PM.
  • eum
    commented on 's reply to PSU Board repair or replacement Ecler Nuo 2.0 DJ mixer
    in Troubleshooting Audio Equipment
    Definitely mains irradiating the circuits board, I tried to shield the PSUs in a DIY manner, but it wasn't effective.
    See more | Go to post
    Last edited by eum; 12-13-2023, 05:10 AM. Reason: Tried..
  • eum
    replied to PSU Board repair or replacement Ecler Nuo 2.0 DJ mixer
    in Troubleshooting Audio Equipment
    [COLOR=#000000]I finally found a work around : add two 18V 40W PSUs in series. The only prerequisite is that the selected PSUs are not ground referenced, otherwise, it would put one output to ground and not work.
    I found that those XP Power Model FCS40US18 could be fixed using the old screw holes. 2 of the 4 for each of these smaller boards, in diagonal, but it was a few mm farther so I had to pinch the edge of the board between washers. I added spacers to the remaining holes so that it won't bend too easily.
    Lastly, each of these PSUs is rated at max. 1.2A input, so the smaller 0.5A    ...
    1 Photo
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  • eum
    replied to Dell Latitude 5410/5510 LA-J371P Broadview / Schematics
    in Schematic Requests ONLY!
    Re: Dell Latitude 5410/5510 LA-J371P Broadview / Schematics

    Hi,

    Here are the schematics I found for the G15-5510 / LA-K662P -> [B][MOD EDIT][/B] [B][COLOR="DarkRed"]Link to schematic[/COLOR][/B] [url]https://www.badcaps.net/forum/showthread.php?t=111546[/url]
    Look at the schematic on page 90.

    It seems close enough on this part of the circuits.

    The SY8388RHC chip generates 3V3_ALW(ays). It powers the Embedded Controller / SuperIO which is the chip listening to the power button and triggering the powering up of the laptop....
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    Last edited by SMDFlea; 10-29-2023, 04:41 AM.

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  • eum
    replied to PSU Board repair or replacement Ecler Nuo 2.0 DJ mixer
    in Troubleshooting Audio Equipment
    Re: PSU Board repair or replacement Ecler Nuo 2.0 DJ mixer

    Little update.
    I tried like I said, with 0.5 Ω sensor Resistor, and it didn't start. It didn't burn either though.
    I'll dig deeper, maybe I can find a PSU calculator using this chip, or an application note.with more precise data.
    See more | Go to post

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  • eum
    replied to PSU Board repair or replacement Ecler Nuo 2.0 DJ mixer
    in Troubleshooting Audio Equipment
    Re: PSU Board repair or replacement Ecler Nuo 2.0 DJ mixer

    There is a MOS driver for fly-back application (UC3842BDG).
    I had downloaded its datasheet, but was not convinced I could find like that.
    You gave me the punch to go look deeper in it, thanks !

    It seems those are 3 paralleled resistors between the switching N-MOS and ground.
    I guess they put 3 to dissipate heat more easily with basic CMS.
    It's supposed to be 0.5Ohm, based on the Figure 35, "27W Off-line flyback regulator", page 16 of On Semi's datasheet.

    There...
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    Last edited by eum; 07-28-2023, 06:58 PM.

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  • eum
    started a topic PSU Board repair or replacement Ecler Nuo 2.0 DJ mixer
    in Troubleshooting Audio Equipment

    PSU Board repair or replacement Ecler Nuo 2.0 DJ mixer

    Hi,
    I try to repair this fly-back type PSU, I diagnosed (identifiable) dead N-MOS and fuse, but there are 3 smd resistors on the bottom that burned and became unreadable.

    The support in charge of the brand in France managed to get me the schematics from Ecler, but it didn't include the PSU board. After a while they finally told me that the unit was too old so they don't have the PSU board schems.

    I can find replacement PSU board online, but only for the Nuo 3 or 4 or 5, and it seems they ar compatible with each other, as I often find boards compatible with these...
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  • eum
    replied to MOTU 896 mk3 re-cap
    in Troubleshooting Audio Equipment
    Re: MOTU 896 mk3 re-cap

    Hi @Khron, I've been fixing some audio stuff for a little while, and been super happy to find your blog and learn more stuff about soundcards ! Thanks !

    I got a cheap 896 mk3 making the "CPU not valid error, Update firmware" error. The error continues after I changed the worst caps in here, brand Meritek. Next will be the big 400V 33uF that you seemed to critisize.

    I have a working Ultralite mk3, same generation, also FireWire only, and it has the same, classic, TSB41AB2. I've made all diode measurements to compare and...
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