Ion total pa pro 15in speaker relay prolem

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  • Paxman_Swede
    Replace 25V cap with a 16V in a portable speaker?
    by Paxman_Swede
    Hi!

    I posted a thread about identifying caps of my Zoom 9000 guitar effect where I mentioned a JBL speaker I'm trying to help my friend with. I haven't gotten any answers to that thread but I have a question regarding the cap in the speaker, so I thought I'd ask it separately.

    The cap is marked 100uf 25V. I have found a set of caps on Amazon that I think will cover the caps of the guitar effekt but it doesn't have any 100uf 25V. It does have a 100uf 16V though. I'm pretty sure I read somewhere on this forum that 25V can sometimes be replaced with 16V...but I can't find...
    01-15-2025, 10:48 AM
  • tmcw
    Stereo speakers to mono speaker
    by tmcw
    I picked up this set of powered PC speakers, no name brand, power cord to one of the speakers, and two audio cables coming out of it, one going to the other speaker, and the other to a 3.5mm jack for plugging into an audio out source.

    So, a typical cheap powered PC speakers setup.

    Now, the sound is pretty decent, I must admit, from the 4 ohm, 3W speaker, but I say "speaker", because it's just coming out of one of the speakers, and not the one with the power cord coming out of it. The other speaker is ok, it's just the electronics going to it has probably a fried...
    05-12-2021, 08:04 AM
  • jm1234
    9V relay temperature 40C
    by jm1234
    Hi, I'm seeing one 9V relay having temperature 40C on its 9V (primary) side. Does that seem right? I switched 2 relays on that board and the temperature was the same (on the same position), so I'm sure it's not a faulty relay. I measured voltage on that relay and it was 9.5V DC, so that looks good. I don't see any other relay on that board having that kind of temperature and they have 9V on them too.
    I thought maybe the transistor that is switching this relay keeps switching on/off, so I also checked for AC and there was almost none: 0.3V using mV range. No steady frequency was shown, but...
    05-09-2024, 03:03 AM
  • edugimeno
    Biomass Boiler not driving cleaner motor relay. ENERTRES BIOMASA BI-650
    by edugimeno
    Hi everyone!
    I have this board that suddenly stopped supplying power to an output that drives an interchanger cleaner motor.
    I checked while the board was in place with all wires attached and there's no AC voltage on the corresponding plug X5
    This X5 is driven by fuse F8 (tested OK) which comes from the second orange relay
    To make sure there are no charcoaled contacts inside the relay, I got a 24VDC power supply and got it ready to manually power up the coil side of these relays.
    I respected the polarity, positive to cathode of protecting diode
    So provided all...
    04-18-2024, 01:15 PM
  • sam_sam_sam
    Mitsubishi CNC switching power supply board dead / relay board bad diode failure
    by sam_sam_sam
    I was working on this CNC machine today found no keyboard functioning no control relay powering on
    The screen powered on and was giving an operation error but the manual was not very clear about what the error exactly was but with a little bit of troubleshooting and finding out that the control relays not powering on and no keyboard functions we narrowed down to this one switching power supply which of course does not have any indicator LED light they are on the keyboard interface/relay controller board

    Found shorted diodes on main controller relays there are 3 of them that...
    01-07-2023, 05:43 PM
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