No mains ligh on i thinkits the input transformer but not surehow to check it trevor

depending on your level of electrical knowledge it may be possible to diagnose the problem.

First check the obvious - fuse in plug / distribution board - you would be surprised how many times this is missed.

Beyond this proceed at your own risk as mains voltages will be exposed.

If you open up the keyboard you can check the input voltage with a multimeter is arriving at the power transformer input.

There may be fuses on the transformer board - check these - DON'T FORGET TO UNPLUG FROM THE MAINS FIRST

Check the operation of the mains switch - these do fail over a period of time and your instrument is quite old now. Unplug from the board and test for continuity across the pins.DON'T FORGET TO UNPLUG FROM THE MAINS FIRST


If the above doesn't solve the issue then you have a more serious problem such as a power supply board failing or a problem on the main board - seek out a Yamaha service centre who might be able to help.

Hi Trevor

If you measured 240V at the input side, how about output side did your measure any volts their?

P0717 Input/Turbine Speed Sensor Circuit No Signal
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gm tech2

Hello
The backlight of your TV is OFF. The main reason for this fault is with a defective backligh inverter transformer fitted inside the TV. This inverter supplies sufficant voltage to the back ligh CCFL lamps, and in turn adjust the brightness of your TV. There are mainly two resons for this fault. Either the backlight inverter transformer has damaged or it drive circuit is damaged. You have to check and find the reason. It is dangerous to work with this section, as this backligh inverter generate very high voltage. If you are not familier with this type of repair, get it repaired by any experienced technician. OK.

Doing a resistance test on a transformer will not give the information you require as you will read very little, if any resistance. What you need to do is an impedance check and that gets involved. If it is a normally wound transformer, not an auto transformer, you can isolate which is the primary and the secondary windings. Unless the transformer is a multi voltage input unit, the primary side will have continuity through only two terminals. The secondary could be more than two if it is a multi output voltage one. If the transformer is a step down, the primary windings will be the thinner wired windings and vice-versa. To actually test the transformer, get hold of a transformer with about a 20 vac output and try it across the two terminals you have identified as the primary windings, you should ge a proportional voltage of the actual output. eg. with 20 vac input and a 2 vac reading at the secondary, the actual output would be 11 vac if your mains voltage is 110 volts. Take care that you are using the transformer at the voltage it is designed for, otherwise it will overheat and burn out.

hi,
check the power cable first. also the power at the wall out lets.
if ok the you have to check the input ac fuse of your receiver. your recever has problem with its power supply stage, that's why there is no standby light also. fist of all check the fuse. then check the standby transformer is it faulty or not. the system will power up if the standby transformer is ok. standby transformer is a small transformer near the mains transformer. check these things first, if u need any further assistance feel free to contact me through fixya.
ok

Most Laptops use S-Video as a way to display video on your TV screen.
You can pick up a S-Video cable at your local Electronics store IE Radio Shack. Before purchasing the cable ensure your TV has the correct input.

The four main types are (in increasing quality):
1. S-Video [2 types: 4Pin as in picture'7Pin]
Port: http://www.coloredhome.com/video/s-video...
Cord: http://akamaipix.crutchfield.com/graphic...
2. VGA
Port: http://upload.wikimedia.org/wikipedia/co...
Cord: http://www.thisishowyoudoit.com/blogimag...
3. DVI
Port: http://vocaro.com/trevor/blog/wp-content...
Cord: http://www.tech-faq.com/dvi-hdtv-connect...
4. HDMI - also transfer sound signal
Port: http://media.bestofmicro.com/,2-3-49323-...
Cord: http://www.k1cable.com/images/hdmi_000.j...

All of these do the same thing: The laptop sends the video information through the Port and the Cord. Your TV Recieves that information in its port. Numbers 1 to 3 do not transfer sound, so you will need a separate adapter for your headphone to TV Audio. #4 HDMI transfers both sound and audio data, so you won't need a separate cable for sound.
Check if your TV has corresponding ports. If not, you can buy adapters. This is an example of a VGA to RCA(Red/White/Yellow analog cables) and S-Video
http://img.alibaba.com/photo/52306528/VG... Thanks for rating good luck

Hi Trevor,
It seems like you have driver issue, you need to update your print driver, make sure you are using the correct one for your PC Operating System, go to HP support.
Contact me if you need further assistance.

Very likely that the internal thermal fuse opened on the main power transformer. With the power cord unplugged, Check the resistance on the ac input of the transformer should read less than 10 ohms. Contact me when you know. I might be able to find one.

Hi there get a multimeter place across mains input on transformer,FIRSTLY DISCONNECT AMP FROM MAINS,set your meter to contiuity ,if good you should get a low ohms reading (resistance),then check the secondaries (output of transformer) either 3 wires or four going into amp board..if readings acroos all wires are low ohms then transformer is good if one is open ,transformer has had it ...hope this helps