Question about Korg Music
Piano has to be on for about 15 minutes before we get any sound. Almost like it has to be warmed up. Then it plays fine. It is 15 years old and just started doing this.
All of the above answers are wrong.
First off, forget about 6ya! Sixya, fixya, scam artists all. See for example, https://tinyurl.com/ybpds4h5. Calling them for a digital piano repair would be like calling a plumber to do brain surgery.
She's asking about a KORG C-155. Not a Roland anything. Not a Technics anything. Not a Kurzweil anything. And the problem isn't about dead notes or intermittent loss of touch sensitivity, or volume issues. Her piano is dead until after a 15 minute warm-up and then plays NORMALLY! This issue just about screams, "POWER SUPPLY PROBLEM!" At least, this is the first place to begin.
For the average user, this is not a DIY project. Troubleshooting it will require an experienced technician with the proper instruments and tools at least an hour to open the unit (ker-ching!), take some measurements, identify the defective assembly or component. Then on a 25 year old unit, he would need to start hunting for replacement part(s), since KORG very likely no longer stocks parts on a unit that old.
That is probably why the typical answer from a professional would be, "save your money, and buy a new unit." Because of the parts issue, the cost of the repair will likely be in the hundreds of dollars (ker-ching!), and when it breaks down again with something else (ker-ching! ker-ching!).
I'm not saying the piano can't be fixed, but I am asserting that it can't be fixed economically by a professional who cannot afford to spend many hours on isolating a defect, hunting online for a USED replacement assembly, or a NEW component (assuming that the repair involves just one or two individual components), then actually doing the repair, and putting the unit back together, and only get paid for a fraction of the actual time involved.
Posted on Nov 27, 2017
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Posted on Jan 02, 2017
SOURCE: korg c-56 struck by lightning.
if your keyboard has been affected by a lightning strike then every semicondutor ( diode transistor i/c ) will be blown ...I know most components are on the mother board but not all ...I reckon cheaper to buy a new one ...sorry
Posted on Feb 02, 2009
If your piano is the same as mine, there is a rubber membrane with contacts imbedded in it that sits on top of a circuit board. The key pushes the contact in the membrane onto the contact causing a note on. What happens is the cylindrical part of the membrane that holds the contact can get torn and the contact will no longer travel in a straight line to trigger the note. The entire membrane strip has to be replaced. The strip on my piano was discontinued and I had to manufacture one from an extra Roland membrane that had some bad contacts in it. You will have to contact Technicsat www2.panasonic.com/webapp/wcs/stores/servlet/PNAEndecaSearchCmd for support. If you don't feel comfortable tackling the repair yourself consult a good piano tuner/repair place in your area for advice.
Posted on Jun 23, 2009
You may need to clean the contacts which are usually conductive rubber. I explained stuff for another Roland problem with two keys that were intermittent. I have an EP-7 that I had to do the cleaning of the key contacts. Use 91 or 99 % Isoprophyl alcohol to clean BOTH the conductive "pill" (Black under silicone rubber domes) AND the traces on the board where they press. Clean gently as the traces have a hard black coating.
Posted on Jul 29, 2009
Assuming the C-303 has a MIDI out, connect a MIDI cable from the MIDI output of the C-303 to the MIDI input of the symphony module.
Connect two audio cables (mono 1/4 inch) from the symphony module to a suitable audio amplification system OR possibly into auxilary audio input jacks of the C-303, if they exist.
I have a Symphony module but not the piano you have and I have mine connected to a Yamaha organ.
Posted on Aug 29, 2009
The contacts of various switches and keys are likely dirty. They are often conductive rubber and need cleaning with 99% isoprophly alcohol and q-tip. Clean both the conductive rubber pill and th circuit board traces they contact.
Posted on Sep 17, 2009
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