Question about Yamaha YST-SW150 Speaker

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Yamaha yst-sw150 I had a power surge that damaged the transformer. Looking for replacement part number or output voltage.

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SOURCE: Yamaha YST-SW150 Subwoofer

hi, is it a humming noise ??? check if the connector is plugged in properly,check the earthing, if its a three pin mains plug, if its a two pin, then the CPU SMPShave a proper eathing. let me know

Posted on Jan 12, 2008

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Tv dead during lightning


Could be minor or maybe done for but here goes. Some flat panel TVs have the main power cord with one of those small transformers built into the plug end that converts 120volt ac to DC power. Output voltage should be listed on the transformer tag. You need to find someone with a voltage tester and see if the TV plug end is showing DC voltage. If not the complete power cord needs replaced. If that checks out-- the next thing is to remove the complete TV back cover and look for fuses right near the power plugs into the TV. The fuses should blow out first from a lighting surge. The problem is how much of a surge you got. It may have damaged the power supply board in the TV which may need replaced. Hope this helps

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Two possible faults:
1. Fault to the main power supply regulator [SMPS] section circuit. Check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician.
2. Check and replace damaged component/s at its horizontal scan output section circuit. Check the LOT (Line Output Transformer) too for damage. Replace the horizontal scan output transistor. Check the input voltage to LOT. If the voltage is absent check the feeder resistor; if any. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts.
http://electronicshelponline.blogspot.com/

Jul 11, 2015 | Orion Televison & Video

1 Answer

When tv is powered on tv only displaying channel number and sound -no raster. using video mode displays are ok. sound is also ok


Check and replace damaged component/s at its horizontal scan output section circuit. Check the LOT (Line Output Transformer) too for damage. Replace the horizontal scan output transistor. Check the input voltage to LOT. If the voltage is absent check the feeder resistor; if any. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts.
http://electronicshelponline.blogspot.com/

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1 Answer

How do I repair a power surge failure


Check and replace damaged component/s at its horizontal scan output section circuit. Check the LOT (Line Output Transformer) too for damage. Replace the horizontal scan output transistor. Check the input voltage to LOT. If the voltage is absent check the feeder resistor; if any. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts.
http://electronicshelponline.blogspot.com/

Oct 04, 2014 | Televison & Video

1 Answer

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Hi Joel, although we've sourced detailed schematic for this P4500 amplifier, there are no many voltage details on it for manufactures sake. Anyway, mine findings are. Secondary winding on main transformer should supply no less than 2 x 75 volts which makes after rectifying and filtration no less than 2 x 90 volts on capacitors with amplifier without input signal. Also transformer has to be very "hard" , otherwise amp will start clipping before reaching stated wattage on output.

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1 Answer

I have a YST-SW150 speaker that turns it self off after 7 minutes , turn it back on and it'll go again for 7 minutes, (sounds good those 7 min) music sensor auto on/off is off


I just fixed one of these with the same symptom.
In between the power supply board and the amplifier board are a number of rather fine interconnect wires. One of these is the shutdown/startup control line for the auto on/off function.
In my case the wire had been pinched where they are cable tied together. Causeing the power supply to think there was no music input and should shut down.
rejoing the broken wire rectified the problem.
In my case more than one wire had been damaged.
the shut down line is labled SO on the amplifier board connector.
7_19_2012_1_10_37_pm.jpg

Aug 10, 2010 | Yamaha YST-SW150 Speaker

1 Answer

Possible burnt out power supply on Yamaha RX-V557


Can you check the power transformer, voltage & resistance.
You may have to unsolder some components to test them...such as the rectifying diodes and the transformer.  I believe that the outputs from the power supply board are all DC voltages.  Is there all so a IC chip on the power supply board?  Does your insurance cover lightening damage?   

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Wiring information Re: Yamaha Computer speaker model # YST-MS201


Hi Robert,
Try to locate your manufacturer's websites or surf to google, this might help. You can ask what you need , or maybe they will ask you for a price or fee. You may request free download in google.......good luck..

Mar 23, 2008 | Yamaha YST-MS201 Computer Speakers

1 Answer

Yamaha YST-SW150 Subwoofer


hi, is it a humming noise ??? check if the connector is plugged in properly,check the earthing, if its a three pin mains plug, if its a two pin, then the CPU SMPShave a proper eathing. let me know

Jan 10, 2008 | Yamaha YST-SW150 Speaker

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