Hi all
Am new to this forum and website, so forgive me for any rule violations and typos.
My Polk Audio DSW Pro 400 subwoofer has recently developed a fault. It's been a sturdy performer so i would like to do my best to try to prevent it from having to be broken for parts or ending up on the rubbish heap. It's a fault which other owners have noted online but have not had much success through Polk Audio customer services. I've not been able to source the amplifier board schematics online either so am in need of your expertise.
Essentially there is no sound output. When i power it on, the front Polk emblem lights up in blue, and the rear indicator light turns green - but then after about 2-3 seconds, the front light switches off, and the green light turns red - as if it's going into standby or like a protection circuit. I get no sound output at all even if there is a feed coming through on my LFE input when i initially turn it on.
i've removed the plate amplifier, and can see that a few transistory/resistors/capacitors are in need of replacement - as they are either corroded/melted/burnt from the appearance of the thing itself or from the discolouration on the board. But i can't identify them exactly and was hoping that someone here would be able to assist with identifying the items that need changing. I'm happy to try soldering the replacement parts.
really would appreciate any advice/guidance - my thanks and appreciation in advice for your support.
Am new to this forum and website, so forgive me for any rule violations and typos.
My Polk Audio DSW Pro 400 subwoofer has recently developed a fault. It's been a sturdy performer so i would like to do my best to try to prevent it from having to be broken for parts or ending up on the rubbish heap. It's a fault which other owners have noted online but have not had much success through Polk Audio customer services. I've not been able to source the amplifier board schematics online either so am in need of your expertise.
Essentially there is no sound output. When i power it on, the front Polk emblem lights up in blue, and the rear indicator light turns green - but then after about 2-3 seconds, the front light switches off, and the green light turns red - as if it's going into standby or like a protection circuit. I get no sound output at all even if there is a feed coming through on my LFE input when i initially turn it on.
i've removed the plate amplifier, and can see that a few transistory/resistors/capacitors are in need of replacement - as they are either corroded/melted/burnt from the appearance of the thing itself or from the discolouration on the board. But i can't identify them exactly and was hoping that someone here would be able to assist with identifying the items that need changing. I'm happy to try soldering the replacement parts.
really would appreciate any advice/guidance - my thanks and appreciation in advice for your support.
