Question about Roland LX10F Digital Piano COMPLETE HOME BUNDLE

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Right side contact board need part - Roland LX10F Digital Piano COMPLETE HOME BUNDLE

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Your only source will be Roland parts. Contact their parts support.

http://www.rolandus.com/support/?tab=service_repair

Posted on Mar 28, 2011

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All the foot pedals on my 1972 Yamaha Electone D-7 from 'A flat' down sound like 'A flat'. What's happened?


That sounds like a problem with the contacts in the pedalboard or a short in the wiring harness. I'd suggest calling a tech in. You could cause a bigger problem if you aren't experienced.

Feb 05, 2016 | Yamaha Music

1 Answer

How can I clean the contact for the keys, some are hard to push?


1: Clear an area on a table or other large flat surface.
2: Spread out a towel or a padded cloth.
3: Place your Q-chord on the towel upside down with the battery compartment facing you.
3: Remove the batteries. Unscrew all the screws. You don't have to remove them. Leaving the in the case means you won't lose any
4: Lift the bottom case off carefully. There's a white connector that plugs into the bottom printed circuit board. Gently uplug the connector and set the bottom of the case aside screw side up so the do nor fall out.
5:There are four ribbon cables. One at the portal for the q-cards and three others. Gently unplug them from the circuit boards.. Don't worry, you can't get them mixed up

6: Unscrew all the screws for the top green circuit board and remove it. Set it aside.

7: You will see a tan board under it that slides partially under a smaller green board. Don't bother the smaller circuit board. Unscrew all the screws in the tan board, and set them aside.

8: Lift out the tan board and flip it over. You can use contact cleaner, or a little rubbing alcohol Q-tip to clean the contacts. Or use a lead pencil eraser and gently "erase" over the contacts. A little bit will usually do you. Don't overdo ANYTHING.

9: Reassemble in reverse procedure. Don't worry. The parts will only go back on the right way. Once you're done, power it up and try those bad chord keys again. They should work.

Apr 07, 2014 | Suzuki QChord

1 Answer

The digitech vocalist live 2 ,the left side button(reverb,enhancer) , activates the right side (harmony) LED's on the circuit board itself are lit up and nothing happens. t


The buttons are probably scanned as a matrix and possibly a circuit board has been cracked causing wrong data to go to the microprocessor in it. It is unlikely this will be a DIY fix so you should contact Digitech for a repair facility.

Jun 21, 2012 | DIGITECH VOCALIST LIVE 2

1 Answer

Only the left channel on the whole board works. Is there some part that might be replaced to fix the right channel?


First analysis needs to be done to isolate what can be discovwered before opening the unit. Does the sound appear in BOTH sides of the headphones? There are MANY components that can kill the right side including cracked circuit board. Beyond a certain point one would use an oscilloscope to troubleshoot.

Jul 20, 2011 | Behringer EURORACK UB2442FX PRO Mixer

1 Answer

When i switch on my Korg PA800, the screen just show's blank. The screen light gets on but just blank blue. What could be the problem?


Hi, Provided your Korg works as normal, besides the display being blank and lit, I may have the answer. It sounds like the contacts connecting the display have somehow become dirty. This could have happened from something getting spilled on the display. To fix is easy enough if you have a little mechanical aptitude. unplug unit/take batteries out,and disassemble unit to gain access to the main circuit board where screen is located, the screen may be held in place with a tin casing either soldered to board or with prong set though the circuit board and twised on the reverse side to hold in place. After removing this there should be a little rubber strip between the screen and circuit board-this is the contact strip that you need to clean with rubbing alcohol. Clean the screen where the contact strip meets the screen. do the same on the circuit board, reassemble and you should be back in business. I hope this was useful, thanks for asking FixYa, and good luck, Prodzilla.

Apr 22, 2011 | Korg Pa800 Synthesizer

2 Answers

I think my crossfader stop working for some reason. when im on side B i get sound then i slide over to side A and i still get sound from side be,,, all the assign are right also the bass mid and hi kill...


I suspect one end of the crossfader pot has broken from the element. The fader probably costs less than $5.

You likely will have to remove all the knobs and some screws to seperate the board with the fader from the front panel so you can replace the fader.

VERIFY the pot is bad with an ohmmeter before dis-assembling however.

You MAY be in luck. It looks like the cross fader has a connector which MIGHT allow you to remove it or certainly only a small board for replacement, seeing these take abuse.

It appears that the cross fader is a dual 100K type B taper.

Apr 26, 2010 | Behringer DJx700 5-Channel Pro DJ Mixer...

1 Answer

My TP100 snare pad is very glitchy. Often when I hit it, it makes no sound at all, or it misses hits. I suspect something is wrong with the small sensitivity dial (not the big red dial), because the...


The dial could have a desoldered pin or oxydized slider contacts. Try to resolder the pins, but if that doesn't solve it then you would need to disassemble and clean the internal slide contacts on the dial which can be a bit difficult, so the alternative is to replace the dial if you can find a spare one.

To bypass the dial (with fixed resistances) you need to know the resistance at each side of the dial when it is in the position that suits your needs (connect the snare to a working input, set the sensitivity as needed, mark the position of the dial).

The resistance can be measured with an ohm meter.
To be sure that the measuring will be accurate, it is ok to remove the dial from the circuit board (adjacent components may affect the measured value).
You should do the measuring on a dial that is good.

After you've removed the dial, set it to the position that you marked previously.

Measure the resistance between left and middle pin of the dial - this will be the value of the fixed resistor which you need to connect to the left and middle hole on the circuit board.
Now measure the resistance between middle and right pin on the dial - this will be the value of the fixed resistor which will be connected to the middle and right hole on the circuit board.

Now you need to get resistors which have the values that you've measured and solder them in place of a bad dial.

It is likely that the measured value will differ from the standard fixed resistor values. To achieve the exact measured value, you can connect two or more fixed resistors in series, just make sure that the added value of the fixed resistors for each side is the same as the measured value on each side of the dial.

Now you need to solder the fixed resistors to the circuit board and the modification is complete.

If you actually decide to do this modification and you're unsure about anything, just post me some feedback, i'll be glad to help.

Anyway, hopefully it is just a desoldered pin that you need to reflux.

Regards,

Triarcuate

Oct 10, 2009 | Yamaha Dtxpress Iv Special Electronic Drum...

1 Answer

Cps-80s - many keys not working-- is it fixable?


The key contacts probably need cleaning. They are likely conductive rubber that contact a circuit board. Clean both the rubber contacts and the area they contact on the circuit board with 99% isoprophyl alcohol.

IF the board is cracked, that is fatal.

Sep 02, 2009 | Casio Music

1 Answer

One key sound louder and does not respond when I


Keyboards that sense the dynamics of playing have two contacts underneath each key. One of those contacts is most probably a bit dirty.
To clean it, you need to open the piano housing, remove the faulty key (you may need to release the keyboard from the base), there are rubber (or another kind of) contacts, similar to those in a remote control. If they are rubber contacts, you need to clean them on the rubber side as well as the tabs on the board under the rubber button with a cotton stick and some ethyl or isopropyl alcohol (don't use acetone, benzene or similar strong solvents, you will damage the rubber).

If they are another kind of contacts (e.g. relay type - metallic, you need to clean them with very fine sandpaper.

That should do the trick, but if it doesn't, there is probably physical damage to the conductive rubber or tabs on the contact board. To repair the rubber contact itself you need repair liquid (e.g. for remote keys, which is actually made of some benzene, some rubber glue and some grapphite powder). You can make it yourself but you may need to experiment with the grapphite/glue ratio to get enough conductance for the contact to work properly. You'll get the grapphite dust by smearing a drawing pencil core over a piece of fine sandpaper.

If the contact tabs on the board are damaged, you'll need some "leitsiberlack" - silver repair liquid, this is a similar liquid that contains silver and makes a somewhat solid contact. (i'm not sure about sources for this, but in europe, it's sold by Conrad electronics under the name "leitsilberlack"). You need to apply some but take care not to connect the two halves of the tab or the key will not work properly.

I had a case of identical malfunction on a roland synth (it has rubber contacts) and the cleaning alone solved the problem entirely, hope you can solve it that way yourself.

regards

3rq8 (Triarcuate)

Jul 22, 2009 | Music

1 Answer

Keys don't work in random pattern formation


The keys are scanned in a matrix. It sounds like two of the matrix lines are broken. They may be broken on the board which the keys contact. These are often conductive rubber "pills" pressed onto finger like patterns of circuit traces. The traces have a black coating in the contact area. If the keys have been "mashed", sometimes the board is cracked. IF the crack goes through one of these contact areas, that is fatal. That board needs to be replaced.
A loose cable where two wires of the matrix aren't contacting would do it as well.

Dec 02, 2008 | Roland Music

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