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Reload Thread: Punch 40DSM has slow turn on?

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    Punch 40DSM has slow turn on?

    My sons Punch 40DSM has a very,veryu slow turn on.....like 90 seconds.What could be causing this?After it turns on it plays fine with zero other issues.







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    Re: Punch 40DSM has slow turn on?

    I'd be willing to bet that you have some bad capacitors in the amplifier. The only issue is finding out where they are since they could be in the remote circuit, audio filtering section, or power supply.




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    Re: Punch 40DSM has slow turn on?

    Any reason not to run it til she blows?




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    Re: Punch 40DSM has slow turn on?

    it may work forever...capacitors are just storage cells for voltage so ...there may be a bad one in the remote circuit...overall it won't hurt to run it as long as everything else seems fine




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    Re: Punch 40DSM has slow turn on?

    All else seems fine....just a pain to wait.lol




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    Re: Punch 40DSM has slow turn on?

    Probably just a 50 cent cap thats dried up after years of faithful service. It would be worth it to re-do all of the electrolytics in this thing. Couldn't cost much more than ten bucks if you are handy with a soldering iron.




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    Re: Punch 40DSM has slow turn on?

    Is there any way to find the weak capacitor without removing them from the amplifier?We have removed the bottom plate and cannot see any caps that may be rounded on the top or anything visably wrong.This little amp sounds great except for the slow turn on.




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    Re: Punch 40DSM has slow turn on?

    If I was going to go through the trouble of pulling the board, I'd just replace them all!




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    Re: Punch 40DSM has slow turn on?

    Where can I purchase these?Would their be any benefit of getting different caps than what came in the amp originally or upgrading them?




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    Re: Punch 40DSM has slow turn on?

    Mouser, Digikey, Newark, etc. Just make certain you use 105 Celsius capacitors on the primary rail side of things. As for upgrading, I recommending sticking with the same uF and voltage as your originals. You can go generally go up to the next level of voltage and capacitance on the power supply caps, but, I would err on the side of caution when doing so.




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    Re: Punch 40DSM has slow turn on?

    And make sure you only buy Japanese or American capacitors. Never, ever, EVER buy a Chinese, Taiwanese or anything else capacitor.

    Sources off the top of my head:
    Mouser Electronics - Electronic Component Distributor
    Electronic Components Distributor | DigiKey Corp. | US Home Page
    www.jameco.com
    US - Electronic Components Distributor | Newark.com
    Allied Electronics
    Arrow Electronics, Inc.

    Going up in capacitor voltage is *always* okay if you're not limited by size/fitment. Going up in capacitance is usually okay but, really, not necessary anyway.



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    Re: Punch 40DSM has slow turn on?

    This reminds me of a conversation I had with a repair tech some time ago. He said that more capacitance means that more power supply FETs will go up if something lets loose in the power supply. My retort was that I generally replace ALL transistors on the side that goes up in flames anyhow. So whether one dies or they all die, it's a moot point because they are ALL getting replaced.

    As for capacitors, I try to buy Panasonic followed by Nichicon. I don't know why, but I developed a hate for Xicon capacitors and will generally replace them in old amps whether they need it or not!




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    Re: Punch 40DSM has slow turn on?

    I just replaced some "Peace" capacitors in one of the circuit boards from my mom's Electrolux vacuum... Heh.

    Panasonic is also my #1 choice and Nichicon also my #2. Almost all of my capacitors are from one of those two brands.



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