Hello, I have a Harman Kardon HKTS 210/230 subwoofer, i don't understand exactly what you want to do, did you fix the defective power card or did you increase the subwoofer power. ln general, the R23 51 Ohm 1W resistor, C30 102/1KV blue ceramic capacitor and 2 Q6, Q7 FTA14N50C N channel mosfets, which break down frequently, break down! But if you can find the new power card, you will see that the R23 51 Ohm 1W resistor has been replaced with a 100 Ohm 3 W resistor, and you will also see that the C30 has been replaced with a 471K 1KV blue ceramic capacitor instead of the 102/1KV blue ceramic capacitor. It would be very nice if you replace the 51 Ohm 1W resistor with the PR03000201000JAC00 - 100 Ohm 3W Vishay resistor, the Maximum Operating Temperature of this resistor has a Voltage Rating of 750 V + 155 degrees. It would be great if you replace it with SİHP15N50E-GE3 - Vishay N channel mosfet instead of FTA14N50C N channel mosfet.
Hello ) Did you changed them in yours own sub? Do you have also some other burned elements? Looks like in mine was burned just this two mosfets. This 3W resistor was survived. Capacitors are also in a ggod conditions. Thx!
@@alexandrn6162 Helloo, I bought a complete zero card, but RU-vid also wore mosfets and resistors branded quality in a repair video, so I ordered and tested 3 different mosfets and resistors that I wrote about in this comment, I never had any problem. But remember, the electrical panel is located in a closed place, I drilled holes with a 4mm, 5mm drill bit on the back cover where the circuit snow fell and drained the hot air, if you want, you can do it too, it's been 2 years, it still hasn't had a malfunction.
