Psw450 subwoofer distortion when turned ON or AUTO

Ffej720
Ffej720 Posts: 5
in Troubleshooting
Hi there, I have a psw450 presently turned OFF. The reason is that if I turn the switch ON or AUTO, there is automatically a loud and constant distortion sound that come off the sub. No matter the volume or if I have the signal cable in. I unplugged all rca or audio source and the sound stay (it really sound like I listen an AM band at the radio but without receiving a good signal). Anyone know the source of that problem? If I plug the rca like usual, I actually don't have the sub working.

The sub itself as been tested on a other amp: good
The rca cable as been tested too: good
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Comments

  • Ffej720
    Ffej720 Posts: 5
    The power caps seem to be good, how can I test it?
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  • [Deleted User]
    [Deleted User] Posts: 7,658
    Hello,
    Welcome to Polk's forum. From your description I would say that the bass amplifier is defective. The best thing to do is telephone Polk's CS department, on Monday, at: 1-800-377-7655 and they will help you solve the problem.
    Regards, Ken
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  • Ffej720
    Ffej720 Posts: 5
    edited March 2015
    The thing is that I don't have warranty, so I need to do it myself...

    Is there any way to get the schematic of the amp? not sure, it looks like there is one resistance missing (the r38).
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  • [Deleted User]
    [Deleted User] Posts: 7,658
    In all likelihood Polk CS can provide amp schematic. There can be many iterations of an amplifier design which can result in parts being indicated on the circuit board but not actually used.
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  • Ffej720
    Ffej720 Posts: 5
    I don't understand all english words, could you tell me what is a likelihood polk cs? is it on this forum? and thx for your advise it's really apreciated.
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  • [Deleted User]
    [Deleted User] Posts: 7,658
    Hello,
    I believe that if you contact Polk's customer service department by emailing them at: polkcs@polkaudio.com you can ask them to send you the amplifier's schematic.
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  • chefkungfu
    chefkungfu Posts: 638
    Hello, welcome to club Polk forum.
    Ken is a great guy and very knowledgeable. Just call the CS (customer service department) they will most likely email a schematic to you. The CS emailed me a schematic for my PSW1200 sometime ago!
    You can also use the search box and probably find it somewhere on the forum. I hope this helps! Kenneth is a great guy (so are many of the other forum members) and has helped me whenever something goes wrong with my stuff!

    Frank.
    SRT Seismic System with dual PSW1200's
    RT5000 x 2
    RT2000p
    CS400i
    CS350-LS
    LS F/X
    PSW650
    PSW1000 w/Dayton SPA1000
    DSW MicroPro 4000
    Adcom amps
    Pioneer Elite SC-89
    Pioneer PLX-1000 Turntable
    PS4
    XBOX One
    MIT Interconnects
    BJC
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  • Ffej720
    Ffej720 Posts: 5
    Thx for all, I'll email the CS tomorrow
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