I have a Fantom S keyboard. I have to press the the F above middle C a lot harder than the other keys to get any sound. How can I repair this?

My guess would be they have been pulled up out of the normal position. Do they still press down and sound?

if you remove the keybed and the contact strip you can then reposition them. The worry is that when they are forced up they sometimes crack the circuit board underneath.

the keys have a hook type arrangement that should stop the, lifting up.

maybe open and report back with some photos of what you find and more advice might be available.

Dan
Becketts Music Ltd

Just a shot in the dark but a lot of keyboards allow for splitting the keyboard in half or even in quarters to assign multiple sounds... have you tried a total reset? Or explore the manual for setting up a split keyboard. Might help.

Hi, This and a lot of similar keyboards have gold flashed pads on the PCB and the keys press one or two rubber caps, with conductive pads in them, down.
Clean the pads with isopropanol, (and nothing else) and it will be cured 99% of the time. If a few notes do not work, especially after heavy use, then the rubber caps can be replaced.
Taking the keyboard apart is long winded because of the number of screws involved.
The job its self is simple enough, but take note of the order things go in and where the screws go.
Hope this helps, Chris.

"can I do it my self or should I go to a professional to get it repaired"?
Get it repaired by a professional. Casio gives long warranty (5 years in Australia). Mine took weeks for Casio Service to repair. Many boards had to be changed.

Does the headphone jack work? Replacing a whole board would be expensive and the problem could be elsewhere. What was the accident? If large signals were driven back into the audio out lines, probably the output driver chip is fried... They likely use a common 8 pin dual op amp as the driver and the part costs 50 cents. It takes a little care to replace it as it is likely surface mounted. I am looking at the audio/jack board for a G-600 and there are a pair of transistors for some testing they do that could also be fried and might be the whole problem if the G-6 uses same or similar circuitry. The Fantom X6 uses very similar circuitry... Download service manual here:

http://elektrotanya.com/roland_fantom-x6.pdf/download.html

Scroll down to "get manual" and click to download. IGNORE other download links. On page 57 of 66 you will find the audio drivers at the right. They use little dual op amps M5218APF which probably are available someplace, however probably 4568's would work fine and are readily available. If you drove high voltage into the audio outs, I suspect first that the RF bypass caps such as C203 on the above schematic shorted. Simple to replace... pennies apiece... The test path transistors such as Q37 may also be shorted... Next would be IC18... While this circuit may not be the exact one for the G6 it probably is CLOSE as the several Rolands all seem to use similar circuitry. Regarding system SAFETY... Make sure ALL and I do mean ALL equipment interconnected including mixers, powered speakers, keyboards, etc. are powered from the SAME receptacle or power conditioning module to avoid accidents. Also for keyboards sent to mixers, USE DI boxes please! These protect against ground loops and these accidents.

If you hook it up with the USB cable Logic should recognise it. You may have to select it in the Audio Preferences as your Audio Interface.

This is a problem with one of the two contacts for that key. The contacts close at different times as the key is depressed and the time it takes between is measured as velocity which is used to control the loudness as in a regular piano. The contacts are conductive rubber pills. After a lot of dis-assembly you can clean them with 99% isoprphyl alcohol and Q Tips. Clean both the pills and the circuit traces on the board they are pressed against. Be very careful of the ribbon cables between the halves of the case.

when i turn on my roland xa it's going on but it show on screen xa fantom and it gonig hang what i do

under the keyboard there is a switch for each key, try to clean it whit water and a smooth paper. I have Roland keyboards and it happens after playing a lot.
good notes

If the key itself is hard to move, you need to find out why. Is the momentary contact switch under the key non-functional?
The Momentary Contact Switch is a lot like that used on a computer keyboard, or a computer mouse.

A metal, or plastic case that surrounds an upside down T shaped plastic piece, which pushes down on a thin spring metal 'diaphragm'. The 'diaphragm' is convex shaped, and the curvature goes up.

In the center at the bottom of this switch, is a contact. The metal diaphragm connects to one side of the circuit, and the contact at the bottom connects to the other side of the circuit.

As the metal diaphragm is flattened, and touches the center contact, the circuit is complete.
The convex shaped metal diaphragm then curves back up, (Because it is spring metal), and breaks the circuit, as your finger comes off of the key.
This makes it a Momentary Contact switch.

When the circuit is complete, electricity goes to electronic components, that make That particular sound. (Note)

Perhaps, parts inside that momentary contact switch are broken. They moved at first allowing you to use this switch, but with extra force. Finally the switch broke completely, and is non-functional now.

If the sound itself is diminishing, it is a Capacitor which is the problem. (Electronic keyboard) Just thought I would add this.

From my own knowledge bank.