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The fuse is a 250volt 1.25 amp slow blo. First thing I would do is check C6 to see if it is bulge or blown - regardless replace it with a 10ufd 100volt Non-polarity capacitor. If the fuse blows again unplug the blue wires from the transformer and plug in unit to an outlet. If fuse does not blow then problem is on PC board. I have a service manual for this item. Probable causes on PC board are Filter Caps, Bridge rectifier (DBA), Amplifier module, or fragments of C6 even causing shorts on board if it had blown.
I have bought C6 from MCM Electronics for under .50 cents but you have to put shrink tube on one lead and bend it back along the body and solder both leads in the board.
Or you could prepare for the worst but live in the moment and wait til it dies. You have time on your side. Plus, you could always use it as a passive sub if you have a separate amplifier. I did that with a Klipsch KSW-12 when my second copy blew its amp.
Hi, If power transformer T1 got shorted or its output voltage got shorted for some reason, fuse will blow in Sony SA-WMSP1 active subwoofer. Check power transformer, D401 bridge rectifiers and IC301 power amplifier out chip. Any of them is bad. Let me know if you have additional question. Thanks.
there are some caps that fail in the power supply. If you are up to doing some electronic repairs, I could talk you through it and tell you what parts to check.
If I remember these correctly, there is a bad coupling cap in the amp section. You should see it as the top should have ballooned up. Replace the cap and you should be OK.
Dan
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