Question about Infinity TSS-450 System
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Posted on Jan 02, 2017
SOURCE: Red light and thumping sound,
If your talking about the thump thump sound thru the sub when in standby mode, here's a fix if your good with a small soldering iron. Remove the amp from the sub. Locate U301 on the limit curcuit. (the small circuit card standing up right) Replace U301 with a TL074IN (www.alliedelec.com part #248-0012) .35cents +S/H also remove R263 from the preamp board,add a new 1N4148 diode(#935-0242) .05 cents to the pre amp board. Connect the Anode of the new diode to the Anode of D101 and the Cathode of the new diode to the Cathode of D108. Replace amp and test. Thump thump should be gone.
Posted on Jan 29, 2011
There's a seller on eBay who has a fixed-price repair for it...
which may be cheaper than sourcing the part and getting it installed it yourself.
Posted on Feb 20, 2011
Try hooking the speaker into a different input device if the problem still occurs most likely the built-in amplifier is shot & has a bad capacitor or other component. You can also try remove all RF emoting devices far away from speakers like cell phones, devices with motors like fans, or any other wireless device or least turn them off. Sometimes other devices on the same A/C circuit can cause interference, computers, tvs, etc.
Posted on Nov 16, 2011
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