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kaboom
kaboom
"Oh, Grouchy!"
Last Activity: 07-24-2023, 03:09 PM
Joined: 01-28-2011
Location: PA
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  • Re: Windows 10 Enterprise - From Ebay...



    Late to the party, but it should be obvious- the [i]dictator "did that."[/i]
    LOL...Re: Windows 10 Enterprise - From Ebay...



    Late to the party, but it should be obvious- the [i]dictator "did that."[/i]
    LOL...
    Re: Windows 10 Enterprise - From Ebay...



    Late to the party, but it should be obvious- the [i]dictator "did that."[/i]
    LOL......
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  • Re: Can these speakers be repaired?



    Or hits the basket and shorts the amp!




    Pick your battles, buuut...



    Sometimes, [b]that[/b] becomes the (rewarding) challenge, [i]all in itself.[/i]
    Re: Can these speakers be repaired?



    Or hits the basket and shorts the amp!




    Pick your battles, buuut...



    Sometimes, [b]that[/b] becomes the (rewarding) challenge, [i]all in itself.[/i]
    Re: Can...
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  • Re: I am in need of a 21 volt switching power supply with at least 5 amp capacity

    Diodegonewild showed the internals of some of these.
    You don't need another enclosure, just use shims to take up the gaps.
    Best to keep the original enclosure- we don't need to make the RFI noise floor worse than it already is.

    To lower the output voltage more than the trimpot allows, reduce the high side divider resistor. Or parallel another across it.
    Use one between 10x and 20x higher than the value currently installed.
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  • Re: Recuperator is not working

    Use diode check, not resistance.

    But in the case of zeners, that only checks the forward direction.

    These appear to use a capacitive dropper power supply for the 5v & related stuff. But you can probably connect a USB supply for testing.

    Those red diodes aren't marked on the PCB; they can either be general purpose, like SMD 4148s, or zeners. For regulation, zeners typically have their anode ([b]non[/b] banded end) connected to the negative side of those electrolytics.Re: Recuperator is not working
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  • Re: Recuperator is not working

    Look for a shorted zener diode across those caps.
    Possibly in the 5v supply.
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  • Re: Monitor making weird noise when charging resolution or in standby mode



    The transformer looks OK, just the varnish it's been dipped in.

    I'd recap the power supply too.
    And as much of the signal board- those can be difficult to remove, but tinning their leads with good leaded solder can make removal easier.

    Good luck!...
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  • Re: Repairing Alesis M1 Active mk2 Monitor Speakers



    Yes.


    And most likely, after warming up, the unit will come right back on after power-cycling, [b]not[/b] requiring a "warm up period."

    I'd also suspect "small" caps, like C35 & similar.Re: Repairing Alesis M1 Active mk2 Monitor Speakers



    Yes.


    And most likely, after warming up, the unit will come right back on after power-cycling, [b]not[/b] requiring a "warm up period."
    ...
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  • Re: Google Chrome Dropping Support for Windows 7?


    [size=4][i]He's baaa-ack![/i] [/size]


    I'd be tempted to bet if this situation played out with a non-intel branded 875 board, the results would've been different/better.
    Those early SATA1 boards were... primitive; nearly a step backwards.
    Their only bragging rights was that they were SATA [i]at all.[/i]
    SATA wasn't really "ready" til SATA II, IMO...Re: Google Chrome Dropping Support for Windows 7?


    [size=4][i]He's
    ...
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  • Re: IBM Aptiva 2144 Power Supply Repair Magnetek

    Hey, nice job.

    "Made in Italy," it's a keeper!
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  • Re: Hayward PS dual voltage only putting out 24v no more 12v

    I see a 5-lead device and inductor & diode near it on the sec heatsink.
    Likely a (LM2576?) "simple switcher" IC. Usually with an enable pin- trace that back and see what drives it.

    Only 24 comes from the transformer; 12 is derived from that via the buck converter.
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  • Re: ELBA tower fan keeps blowing resistor

    You don't need any of that.
    Superfluous stuff to lights some LEDs, and give pushbutton speed/oscillate control.

    Replace with a rotary switch to change speeds of the main motor, and an SPST switch to control the oscillate motor.


    No need for any "confirmation;" the OB2223 has burn marks.

    And do [b]not[/b] replace an MOX resistor with a film one, [i]especially[/i] when used as a "fuse-istor."
    That OnBright IC is a non-isolated buck converter. The 2 larger electros...
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    Last edited by kaboom; 09-27-2022, 09:09 PM.

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  • Re: Gateway 80486-DX2/50 Revival



    I read your reply, but ATM, just have time for a quick reply...

    re: power plugs. If the reds were together, +5 was grounded via the chassis, [i]if[/i] metallic motherboard mounting was intact. Some of those old ones used nylon standoffs & fiber washers, so it wouldn't always trip the power supply- in which case "motherboard dead." And even if the short on +5 shunted that rail, the [i]other[/i] voltages could still damage stuff during the brief period they "twitch."

    re: HDDs- Maxtor...
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  • Re: Gateway 80486-DX2/50 Revival

    Those old Gateways... it probably weighs 90 pounds!


    Now an easy way to remember that two-plug power connector:

    Black to black, you're OK, Jack...
    Red to white, [i]what a fright![/i]



    The implementation for PCI on 486 was always a backwards cluster- literally trying to backport () something from early pentium stuff.

    VLB would be it, though DX2s always ran the busses at half the internal clock; a straight DX50 would be 50 internal [i]and[/i] external.

    ...
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  • Re: Computime CANh011 Kitchen Oven controller burnt resistor what value?



    It's a reflection....
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  • Re: Netgear = By far the most horrible support ever!



    Delta is/was always OK, at least when not "strongarmed" into cheap caps. Dell-OLOL!...
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  • Re: Netgear = By far the most horrible support ever!



    Back in the mid-2000s, I always thought NG was a bit too "tryhard," especially since (old-school) Linksys was in its prime.

    But now, TPL is probably my first (only?) choice. Especially since I've seen videos of their stuff performing well in, shall we say, "adverse" conditions.

    TPL FTW!...
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  • Re: Netgear = By far the most horrible support ever!


    "I'm losin' my balls over heeeere, and this fuckin' moron's playin' Hazel!?"
    "So leave the fuckin' cheese... [b]WHERE IT IS!!![/b]"
    "Havva good time."
    Re: Netgear = By far the most horrible support ever!


    "I'm losin' my balls over heeeere, and this fuckin' moron's playin' Hazel!?"
    "So leave the fuckin' cheese... [b]WHERE IT IS!!![/b]"
    "Havva good time."
    Re: Netgear = By far the most horrible support...
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  • Re: Nichicon - discontinuing many electrolytic capacitor series

    This is unbelievable. I never thought I'd live to see [b][i]this.[/i][/b]
    As if the last few years haven't been stupid enough...
    Re: Nichicon - discontinuing many electrolytic capacitor series

    This is unbelievable. I never thought I'd live to see [b][i]this.[/i][/b]
    As if the last few years haven't been stupid enough...
    Re: Nichicon - discontinuing many electrolytic capacitor series

    This is unbelievable. I never thought I'd live to see [b][i]this.[/i][/b]
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  • kaboom
    replied to Psu pc Hp sff
    Re: Psu pc Hp sff

    I've worked on two of those HP SFFs, 6300's IIRC. One had a junk "replacepower" replacement, whose original caps failed after 6 months or so.
    The second had its original PS, but with tired/bulging caps. So I found an OEM PS for the first computer.
    Then, each one ended up with recapped OEM PSUs.

    Try to find pinouts of the OEM connectors, and see if any pins are redundant.
    Be especially certain that no pins/voltages are transposed to the wrong places, as this will (probably?) destroy the MB!
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  • Re: Learning with ATX CHIEFTEC 450W PSU

    If it hasn't been mentioned already, [i]make sure[/i] you're using the correct common point!
    If you're shunting that pin of the APFC IC, it will go to the [b]-[/b] side of the line rectifier!
    Not secondary DC common or the "third pin" of the AC line cord!
    Even with the dimbulb, you're likely to cause damage by using the wrong "ground."

    I would've just gone with a bigger bulb & not bothered attempting to defeat the APFC, at least til I had a "clearer picture" of what I thought...
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