The item was new in box and still smell the new electronic smell when i turn it on there was no lights and no sound but the blue loading screen, never showed the yamaha logo when booting. I figured it was a defect by the manufacture? I mean it was a dead one! i am returning it for another one, it seems these model are having a lot of defect within past 3 years.
SOURCE: Yamaha YPG625 screen shows only vertical lines
I brought the keyboard into a local service technician. He told me that he had to remove about 50 screws but the solution was simple. He unplugged and reconnected the ribbon connector. It apparently was not making good contact.
SOURCE: YamahaDGX-220 YPG-225
Do a factory reset. First try pressing the + and - buttons simultaneously.
Look in your user manual for a complete factory reset and do that.
SOURCE: Yamaha CVP 309-When I power it up, red power light comes on, but
You have to remember that the voltages coming out of the power transformer are A.C. and the voltages used by the devices in the keyboard are D.C. Check for voltage rectifier I.C.s between the transformer and the rtest of the circuits. They should look like squares with 3 pins coming out of the bottom of them and metal backs that protrude above the top of the black squares. Use a volt ohm meter on direct current range and clip the black lead to a circuit ground such as a ground on an output jack. Touch each pin one at a time taking note of the voltage. If you find one that has the same voltage on all 3 pins it is probably shorted. I think the voltage should be about 12volts direct current positive or negative depending on the circuit. Each one will have a code that you can cross reference on the net to find the pinouts and specs. The same thing goes for all the I.C.s If you can find the pinouts for any that you suspect look for the power supply pins and check what the voltage is. Some will have two supplies, one negative and the other positive. If you find an I.C. with power at all pins or ones that should have no power only signal then it is likely shorted. Go slowly and don't bridge two pins at once by accident and you might be able to find the problem without the schematic or a service manual. There is a memory battery (CR2032) that power the memory that might be dead but that should only affect the programmed sounds not the LED or the amp chip. Hope this helps. Do not measure A.C. with the D.C. range or you'll burn out your meter. Use safety precautions with a live device.
SOURCE: What needs to be removed from my Yamaha YPG-625 to
DO NOT open the case unless you are aware of and comfortable with the fact that you could _destroy_ your piano. Easily.
Observe appropriate anti-static precautions. It should go without saying that this is an electronic repair, and dangerous voltages may exist inside the case.
1. Remove the stand if you have one
2. Lay the keyboard upside down (bottom up) on workbench
3. Remove all 90+ screws from the bottom of the chassis, including the 14 inside the speaker compartments
4. Carefully lift up on the bottom case part, taking not to damage the speaker lines
5. Unplug speaker connector and set lower case aside
6. LCD is mounted beneath main logic board
9in the center), my problem lies elsewhere, but competent and cautious service technique should lead you where you need. I would strongly recommend replacing the LCD assembly module, unless you are experienced in LCD repair.
SOURCE: I am not happy at all with sound quality of Yamaha
The small speakers LIMIT the quality... it sounds much better with an external amp.
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