I've got an Infinity HPS-1000 Subwoofer that I purchased new about 12 years ago that is starting to give me some problems. I've noticed over the past few months that it's not turning itself "on" automatically like it should.
Normally, the unit provides bass sounds ranging from very-soft to room-shaking, but lately it seems to be mostly silent and only engage itself during really loud special effects. It acts like it's "automatic turn-on threshold" has climbed somehow requiring a greater input signal before it kicks-in and produces sounds. (Once it does "kick-in" I believe it then seems to work normally for the remainder of the movie.)
The "guts" of the unit contains a 1000-watt Indigo AC BASH amplifier with a total of (3) 2.2uf/50v, (9) 22uf/50v, (4) 22uf/35v and (5) 470uf/200v caps. The power supply is simply a bridge rectifier across the 110vac input tied directly to the 470uf caps. I don't have access to a HPS-1000 Service Manual, but it's sibling HPS-500 Service Manual (which includes many references to the 1000) can be accessed/downloaded from here: http://www.manualslib.com/manual/720...y-Hps-500.html.
All the caps appear to be perfect with no leaks/no bulges/etc. There is also no indications of any overheating or burned components anywhere.
I'm hopeful that maybe someone with more electronics experience than myself might look over the schematics and give me some idea as to what the real problem might be, otherwise I'll probably just do a "shotgun" replacement of ALL the caps to see if that fixes it...
THANKS!
Normally, the unit provides bass sounds ranging from very-soft to room-shaking, but lately it seems to be mostly silent and only engage itself during really loud special effects. It acts like it's "automatic turn-on threshold" has climbed somehow requiring a greater input signal before it kicks-in and produces sounds. (Once it does "kick-in" I believe it then seems to work normally for the remainder of the movie.)
The "guts" of the unit contains a 1000-watt Indigo AC BASH amplifier with a total of (3) 2.2uf/50v, (9) 22uf/50v, (4) 22uf/35v and (5) 470uf/200v caps. The power supply is simply a bridge rectifier across the 110vac input tied directly to the 470uf caps. I don't have access to a HPS-1000 Service Manual, but it's sibling HPS-500 Service Manual (which includes many references to the 1000) can be accessed/downloaded from here: http://www.manualslib.com/manual/720...y-Hps-500.html.
All the caps appear to be perfect with no leaks/no bulges/etc. There is also no indications of any overheating or burned components anywhere.
I'm hopeful that maybe someone with more electronics experience than myself might look over the schematics and give me some idea as to what the real problem might be, otherwise I'll probably just do a "shotgun" replacement of ALL the caps to see if that fixes it...
THANKS!
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