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Type: Posts; User: Relayer

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  1. Replies
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    1,197

    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...
  2. Replies
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    815

    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...
  3. Replies
    8
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    815

    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...
  4. 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...
  5. 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...
  6. Replies
    3
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    900

    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,
  7. 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
  8. Replies
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    541

    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,...
  9. Replies
    3
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    900

    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,...
  10. 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...
  11. 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...
  12. Replies
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    1,687

    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...
  13. Replies
    4
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    706

    Closed: Re: MOSFET Symbol Confusion...

    Thank you Klaus and dick_freebird. My doubts have been allied. ;-)
    Regards,
    Relayer
  14. Replies
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    706

    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...
  15. Replies
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    1,202

    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...
  16. Replies
    8
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    1,325

    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...
  17. Replies
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    584

    [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
  18. Replies
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    5,259

    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
  19. Replies
    8
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    1,989

    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,...
  20. Replies
    27
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    5,259

    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...
  21. Replies
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    1,269

    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...
  22. 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...
  23. Replies
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    3,883

    Closed: Re: Home made electronic microscope

    Hello john-nafp,
    I think you've done an excellent job. Presentation was very good also.
    I have to admit that its not the prettiest light microscope I've seen, but
    the best thing is that you made...
  24. Replies
    27
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    5,259

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

    Hello mista1,
    OK, it looks like that transistor isn't the one to switch the unit on.
    Please see picture below:

    Rear of PCB

    I take it that the component marked with the RED arrow isn't...
  25. Replies
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    618

    Closed: Re: SMD Capacitor identification?

    Hello berger.h,
    What part of a circuit are those caps placed in?
    Regards,
    Relayer
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