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Type: Posts; User: Relayer

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  1. Replies
    39
    Views
    2,344

    Closed: Re: HP 54520A Blown Fuse Problem

    Hello neazoi,
    You need to replace the thermistor. It cracked for a reason.
    Thermistors are notorious for going short circuit.
    Your case is a rare one. They normally short immediately.
    After many...
  2. Replies
    8
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    881

    Closed: Re: 450w ATX smps switching voltage low

    Hello dey4su,
    What is the part number of the integrated circuit underneath the mains input filter PCB?
    Regards,
    Relayer
  3. Replies
    5
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    435

    Closed: Re: damaged remote control

    Hello Dr_Mohammad,
    Check the yellow resonator on the back of the PCB. See if one of the
    legs have snapped off. Try gently moving it to see if there's a gap
    between the resonator and the legs....
  4. Replies
    10
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    1,336

    Closed: Re: 3 Watt inrush resistor will eventually fail?

    Hello treez,
    4.7 ohm 3 and 5 watt resistors have been in use with virtually every bit of consumer
    appliances over the years, and in those, it was extremely rare that it ever failed on its own.
    Its...
  5. Replies
    8
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    1,084

    Closed: Re: lm386 smd earphone power

    Hello Audioguru,



    Same this way, though I'm not needing a hearing aid just yet... :razz:
    It shouldn't be much longer though. Listening to AC/DC live in concert
    at the local high school before...
  6. Replies
    8
    Views
    1,084

    Closed: Re: lm386 smd earphone power

    Hello rompelstilchen,
    Check the schematic below:

    Guitar Jammer

    The above is a Guitar Jammer designed by Silicon Chip magazine here in Australia.
    I've made some modifications, but...
  7. Closed: Re: How to Judge Whether IC is Working Correctly in Electronic Circuit or Not

    Hello j33pn,



    If its a tuning fault, you should still be getting something out audibly. Just normal hash at least, no matter how far off your tuning is.
    You need to determine if you have an...
  8. Closed: Re: How to protect for Surge Voltage and Current in DC

    Hello dsanthosh67,
    I don't think you should connect the SMPS grounds to earth.
    I think its should be a floating supply. You don't really have any isolation on it. Its hard
    to say without seeing...
  9. Replies
    3
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    982

    Closed: Re: Can you tell me what is this component?

    Hello Canberk,



    Nice :wink:



    No, it was the text I was interested in. The "5V", "GND" and "BG1"...
    Regards,
  10. Closed: Re: How to protect for Surge Voltage and Current in DC

    Hello dsanthosh67,
    You could try inserting a 4.7 ohm 5 Watt resistor between the power IN and C254 to be used
    as a surge limiter, as was used in a lot of earlier CRT televisions.
    Regards,
    Relayer
  11. Replies
    1
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    635

    Closed: Re: SONY CMOS image sensor full datasheet

    Hello arieblum,
    I doubt you'll be able to get a schematic for this device. You'd be better off to try
    contacting a $ony authorised service agent that repairs these under warranty and
    ask them,...
  12. Replies
    3
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    982

    Closed: Re: Can you tell me what is this component?

    Hello strahd_von_zarovich,
    I think you are correct in that the component marked: A40A 585V is an Op-Amp. And going
    by what I was able to search, there's a good chance its an OPA40A Single-Supply,...
  13. Closed: Re: Identify zener diode ZD801 in video monitor by V7, model D1912-N6

    Hello Rusthugger,



    I agree with c_mitra. Since the zener has no short, replacing the defective caps is the next objective.
    There's a good possibility that due to those caps having their...
  14. Closed: Re: Identify zener diode ZD801 in video monitor by V7, model D1912-N6

    Hello Rusthugger,
    If you have a multimeter, then just check the diode in circuit to see if its gone short-circuit.
    If it has, then you need to trace the tracks backwards to see what other...
  15. Replies
    23
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    1,849

    Closed: Re: General electronic troubleshoot.

    LMAO... Another pearler Barry. :laugh: :thumbsup:

    Jokes aside, ron-e-g can you please refer to the picture below:

    148139
    36V Motor

    Looking at your modified circuit, there is a good...
  16. Replies
    4
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    849

    Closed: Re: MOSFET Symbol Confusion...

    Thank you Klaus and dick_freebird. My doubts have been allied. ;-)
    Regards,
    Relayer
  17. Replies
    4
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    849

    Closed: MOSFET Symbol Confusion...

    Hey guys,
    Please see picture below:

    148133

    As you can see, I have shown in the picture of two different diode symbols. One looks like a Schottky diode, where-as the other looks just like a...
  18. Replies
    9
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    1,348

    Closed: Re: Broken 240/120 switch on Transformer

    Hello Thayne,
    That switch doesn't look like it can handle 110 or 240V AC, especially current wise.
    Does it have an imprint or markings on it that its suitable for mains AC operation?
    Sorry to be a...
  19. Replies
    8
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    1,626

    Closed: Re: too bright CRT tv picture

    Hello yaaku,
    Please refer to the link below:

    Samsung

    Could you please check the spark-gaps as shown with the RED arrows?
    What you may have to do is grab an old blanket and cover yourself...
  20. Replies
    4
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    638

    [SOLVED]Closed: Re: circuit analysis and behavior

    LMFAO, good one barry... :clap: :thumbsup:

    This has cheered me up for the day and given me a good and
    unexpected laugh... Once again, good one barry... ;-)
    Regards,
    Relayer
  21. Replies
    27
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    5,811

    Closed: Re: Anndroid box (Mx box 3) won t turn on

    Hello mista1,
    Please click the links below:

    NO POWER 1


    NO POWER 2


    In my opinion it seems that due to plugging the 12V plug pack into your MX3, that it has done
  22. Replies
    8
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    2,987

    Closed: Re: CRT TV green color missing after sometime

    Hello yaaku,
    I'd say with high certainty you have a thermal problem, where a component is changing its value
    with heat.
    Brian's suggestion would be the first thing you need to do. Failing that,...
  23. Replies
    27
    Views
    5,811

    Closed: Re: Anndroid box (Mx box 3) won t turn on

    Hello mista1,
    What is the exact model number of your unit?
    I've been trying to find some information on the internet, but due to
    not knowing what model you have makes searching a bit futile.
    For...
  24. Replies
    14
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    1,373

    Closed: Re: Homemade Multi-Drill

    Hello Cosmosus,
    This is not quite on track with what you're asking, but just last year I removed the batteries
    on one of my 12V cordless drills and converted it to take power from an old PC power...
  25. Closed: Re: A ceramic capacitor of too low voltage may have been fitted on all our boards?

    Hello treez,



    To me, this smells of a manufacturing failure on some of these caps, especially if found to be the correct
    working voltage.
    You should insist on obtaining the faulty caps and...
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