Can Klipsch Subwoofers Be Repaired

Hello ngen33r, I am posting here in your thread to hopefully get some assistance.  I have a RPW-ten that worked great for years and and then no longer was working...I unfortunately left the switch in the "automobile on" position.  I don't use the surround sound organisation on this Tv oft, then i do not know how long ago it stopped working...it may accept been several months ago!  I institute the fuse was blown, replaced it and it blew immediately.  I removed the plate amp, but I did non see anything obvious in regards to blown components in the power supply.  A Google search brought me to this thread and I was on my manner!  I followed every proffer in this thread: 1) rebuilt PDC, 2) replaced mosfets, 3) total recap, 4) replaced TH3, and eventually upgrading Q5 to 2N4401 from SOT 23.

Rebuilding the PDC was done based on your schematic in the offset mail of this thread.  Even so, the values of my original resistors were totally dissimilar from those in your schematic---although the board number was exactly the aforementioned (660038RA).  Run into pictures beneath:

Original board:

Rebuilt PDC:

I also replaced the two IRF730 Mosfets with two IRF740 Mosfet transistors.  I also replaced TH3 (DSP104) even though at that place was no impairment to it and and then I replaced all CAPs with Nichon and Kemet (470uf) 105 C caps except I did not change the two 35V 4.7 non-polar caps at C48 and C53 (I ordered regular polar caps past mistake).  In improver to all of the suggestions you made in this thread, I also (six) replaced the two voltage regulators at U4 and U5, (seven) replaced the transistor at Q8, and for good mensurate (9) I changed out all 5 of the output transistors (IRFZ14).  The motion picture beneath summarizes all of the changes:

Summary of All changes (earlier changing out Q5):

At present, I am no longer blowing fuses simply the amp is nonetheless not working.  Afterward a short catamenia of existence on, the Mosfets really start to heat upwardly...I am not noticing whatsoever other components getting warm and in that location is absolutely no speaker noise.  I am now stuck and I am almost tempted to replace the safety capacitors (xanthous thingys) and the bridge rectifier.  Nonetheless, I wanted to reach out to you first for some guidance.  I have no schematic and I haven't got the slightest clue how to trouble shoot without knowing voltage "test points".  Tin can you delight requite some advice?  I am tempted to throw in the towel and but a new plate amp replacement, only I feel similar I am as well far into this to quit now...do you have any advice for a hobbyist?  Thanks in advance!

Edited March viii, 2022 by wderbi

Source: https://community.klipsch.com/index.php?%2Ftopic%2F187446-sub-10-sub-12-rpw-10-repair-blog%2F

Posted by: hilliardquieron.blogspot.com

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