Question about Toshiba 55H70 55" Rear Projection Television

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Needs a stand by transformer - Toshiba 55H70 55" Rear Projection Television

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Posted on Dec 19, 2007


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No. To work with 220V~240v; the device need a step down transformer to be connected in between line and device. The transformer [voltage converter] should be used, otherwise; the unit will get damaged. The step down transformer adaptors can be bought locally.

Oct 30, 2014 | JVC GR-D70EK Mini DV Digital Camcorder

2 Answers

I just bought KitchenAid Artisan Stand Mixer KSM150PS with 110v and 60Hz online and received it today and realised I cannot use it on australia. Can I use transformer which I can get here to convert 110V...

You need a Step Down Voltage Converter (also called a Voltage Transformer)
which steps down 240, 230, 220 volts to 110 volts and
allows you to use 110 volts Devices from USA in 220 v / 230 v / 240 v Countries

Aug 10, 2011 | KitchenAid KSM150PS Artisan Series Stand...

1 Answer

Hi, Rx-v559 power button doesnt power up amp. +5v stb is active... whats the most likely problem?

If the power relay clicks. It may need the main power transformer. Primary of the transformer should be almost a short, if it is open-it's bad.
If no relay click. It could be main micro, stand by relay or the transistor that switches the relay on.

Mar 10, 2011 | Yamaha RX-V559 Receiver

1 Answer

Need schematics for honeywell s861ou3009

Those terminals are the power to the module. The tr should be the 24v (hot) line coming from the transformer. The tr/th is the common from the transformer and the th is the 24v line coming back from the t-stat. So tr stands for transformer. the th stands for thermostat. And the th/tr is the common.
I know you ask for schematics but I felt that I could easily explain it to you. It really isn't all that hard. In some cases the tr does not need to be hookup. if you only have two wires there than just hookup the th/tr and the th and it will work.

Nov 18, 2009 | GE Profile Spectra JGBP90 Gas Kitchen...

1 Answer

No power to unit

OK, No +7 Volt.
It means Stand-by Transformer (T902) is bad / open and you need to replace it.
Its part number is as follows...


Available in Part Store.

Below is an image of 'Standby Power PCB' and T902 is marked with red.


Good Luck.

Jan 15, 2009 | Sony STR-DE898 Receiver

1 Answer

Won't power up

Does the unit light up...standby light...anything?? If the unit is completely dead then you have a bad stand-by power circuit...98% of the time the stand-by transformer is bad. It is a tiny transformer usually near the back of the unit and MOST of the time right where the ac line goes through the back panel. To test this part you need an volt-ohm-meter or digital multi-meter. The input side of this transformer (side where ac goes into) must have continuity (current will pass through it). It most likely will read "open" on the meter. This part is available from Good luck!


Oct 14, 2008 | Sony STR-DA3000ES Receiver

1 Answer

Switching from 110/60 to 220/50 power supply

Yes, you will need to get a transformer..try an electrical wholesaler and ask for a current converter.

May 09, 2008 | Husqvarna Lily 540 and 550

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