tag:blogger.com,1999:blog-4391199926955637123.post7708266637687106393..comments2024-03-22T06:22:18.127+01:00Comments on Willy Tarreau's stuff: Repairing Korg Krome's blank screenWilly Tarreauhttp://www.blogger.com/profile/10872713941638092663noreply@blogger.comBlogger89125tag:blogger.com,1999:blog-4391199926955637123.post-18255039576284480852023-07-12T04:47:13.565+02:002023-07-12T04:47:13.565+02:00Hi, it goes to the motherboard. I've just uplo...Hi, it goes to the motherboard. I've just uploaded a photo of the board on top of it (at step 5 above). Hoping this helps!Willy Tarreauhttps://www.blogger.com/profile/10872713941638092663noreply@blogger.comtag:blogger.com,1999:blog-4391199926955637123.post-32760049754760412042023-07-12T04:46:52.549+02:002023-07-12T04:46:52.549+02:00This comment has been removed by the author.Willy Tarreauhttps://www.blogger.com/profile/10872713941638092663noreply@blogger.comtag:blogger.com,1999:blog-4391199926955637123.post-51621198316380934822023-07-11T22:58:13.177+02:002023-07-11T22:58:13.177+02:00Hi, I would just like to know what is the Flex Rib...Hi, I would just like to know what is the Flex Ribbon the white with blue at the bottom? Thank You! canorhttps://www.blogger.com/profile/12798843619062865989noreply@blogger.comtag:blogger.com,1999:blog-4391199926955637123.post-58155414796156252922022-09-20T17:38:27.690+02:002022-09-20T17:38:27.690+02:00Hey @AmreinFX, you're welcome, many thanks for...Hey @AmreinFX, you're welcome, many thanks for your trick, my Krome also continues to work flawlessly one year later, and you found the real cause. Kudos for this!Willy Tarreauhttps://www.blogger.com/profile/10872713941638092663noreply@blogger.comtag:blogger.com,1999:blog-4391199926955637123.post-42404090467858388492022-09-20T13:38:26.698+02:002022-09-20T13:38:26.698+02:00Thanks! Willy, I´m Mr Unknown in the previous comm...Thanks! Willy, I´m Mr Unknown in the previous comment. I really appreciate that my suggestion has worked. Your blog is my first consultation whenever I have a question. Now I am working with another Krome that directly does not turn on. Best regards from Argentina. DiegoAmreinFXhttps://www.blogger.com/profile/06061157755559923648noreply@blogger.comtag:blogger.com,1999:blog-4391199926955637123.post-11804884882093592372022-05-08T19:26:56.902+02:002022-05-08T19:26:56.902+02:00Very possible, but in this case if I were you I wo...Very possible, but in this case if I were you I wouldn't try my luck (unless it's extremely inexpensive). Their power supply is not among the simplest from what I remember about the inside, I seem to remember it has multiple voltage outputs, and maybe a separate, likely independent one for the audio output stage. So it shouldn't be as simple as replacing it with the first 12V PSU board around.Willy Tarreauhttps://www.blogger.com/profile/10872713941638092663noreply@blogger.comtag:blogger.com,1999:blog-4391199926955637123.post-45530042488490467012022-05-08T14:02:43.623+02:002022-05-08T14:02:43.623+02:00So the issue might be diffrent because the guy sa...So the issue might be diffrent because the guy said there is no sound and no screen ...maybe the power supply...Yannickhttps://www.blogger.com/profile/12522865250940113072noreply@blogger.comtag:blogger.com,1999:blog-4391199926955637123.post-16760024574410916102022-05-08T10:17:09.701+02:002022-05-08T10:17:09.701+02:00It works perfectly (except for the screen). I coul...It works perfectly (except for the screen). I could even tap on the screen on previous traces of my fingertips which did correspond to the instrument selection at the top and to the "next" button at the bottom, to select the one I wanted. Similarly, pressing the buttons to directly enter an instrument number did work fine (I printed the whole list for this). If you can buy a 88 keys for a cheap price and it's its only issue, that would be nice. But I doubt someone would sell it for spares only for the screen, since it can still serve as quite a good piano on the default setting.Willy Tarreauhttps://www.blogger.com/profile/10872713941638092663noreply@blogger.comtag:blogger.com,1999:blog-4391199926955637123.post-52224433069961621862022-05-08T09:09:29.035+02:002022-05-08T09:09:29.035+02:00Hi willy
I have a small question, when the screen ...Hi willy<br />I have a small question, when the screen is black, does the krome still producing any sound, can you still using with the buttons or it appears dead? I'm asking that because I have seen an offer for a 88 black issue screen which is sold for spares... Yannickhttps://www.blogger.com/profile/12522865250940113072noreply@blogger.comtag:blogger.com,1999:blog-4391199926955637123.post-87644590776415133562021-12-05T17:39:37.876+01:002021-12-05T17:39:37.876+01:00Please, post in English only. Translation here: &q...Please, post in English only. Translation here: "Yes!!! Think ??? How to recall 19990 instruments ??? It's easier to hide this problem".Willy Tarreauhttps://www.blogger.com/profile/10872713941638092663noreply@blogger.comtag:blogger.com,1999:blog-4391199926955637123.post-2183314945592447192021-12-05T16:52:16.914+01:002021-12-05T16:52:16.914+01:00Да!!! Подумайте??? Как отозвать 19990 инструментов...Да!!! Подумайте??? Как отозвать 19990 инструментов??? Легче скрыть эту проблемуAnonymoushttps://www.blogger.com/profile/14795145091397925307noreply@blogger.comtag:blogger.com,1999:blog-4391199926955637123.post-64179248912273525342021-12-05T14:39:28.621+01:002021-12-05T14:39:28.621+01:00Translated to English: "I think that not ever...Translated to English: "I think that not everyone has a problem .... Apparently there was a certain batch of synthesizers with this breakdown .... that's all. It's a pity that korg technical support hid it"<br /><br />Yeah I agree. I guess they ordered low-quality capacitors like everyone else in the early 2010s and never wanted to admit it because they were afraid to recall many devices.Willy Tarreauhttps://www.blogger.com/profile/10872713941638092663noreply@blogger.comtag:blogger.com,1999:blog-4391199926955637123.post-32366974024512951272021-12-05T13:52:10.092+01:002021-12-05T13:52:10.092+01:00Я думаю что проблема не у всех.... Видимо была опр...Я думаю что проблема не у всех.... Видимо была определенная партия синтезаторов с этой поломкой....вот и все дела. Жаль что техническая поддержка korg это утаилаAnonymoushttps://www.blogger.com/profile/14795145091397925307noreply@blogger.comtag:blogger.com,1999:blog-4391199926955637123.post-38302052078357084862021-12-05T13:24:54.180+01:002021-12-05T13:24:54.180+01:00Awesome! I'm wondering how many Krome we'v...Awesome! I'm wondering how many Krome we've saved from the beginning :-)Willy Tarreauhttps://www.blogger.com/profile/10872713941638092663noreply@blogger.comtag:blogger.com,1999:blog-4391199926955637123.post-14600191156735700252021-12-05T11:56:50.623+01:002021-12-05T11:56:50.623+01:00Thank you friend!!! I re-soldered the capacitor a...Thank you friend!!! I re-soldered the capacitor and everything works.Anonymoushttps://www.blogger.com/profile/14795145091397925307noreply@blogger.comtag:blogger.com,1999:blog-4391199926955637123.post-57503409385161528152021-12-05T09:16:44.192+01:002021-12-05T09:16:44.192+01:00That's not what I'm saying. Contrary to th...That's not what I'm saying. Contrary to the resistor where you can install another one on top, you have to remove the capacitor because it's partially shorted, an install a fresh new one. It's more difficult to chose a capacitor if you're not in electronics because usually there is no marking on them. That's why I explained how to select one to steal from another board.Willy Tarreauhttps://www.blogger.com/profile/10872713941638092663noreply@blogger.comtag:blogger.com,1999:blog-4391199926955637123.post-53416185391419447242021-12-05T07:48:28.305+01:002021-12-05T07:48:28.305+01:00Original doesn't fit? did not understand? do...Original doesn't fit? did not understand? do I have to put another one?Anonymoushttps://www.blogger.com/profile/14795145091397925307noreply@blogger.comtag:blogger.com,1999:blog-4391199926955637123.post-80258217492899342192021-12-05T07:40:58.801+01:002021-12-05T07:40:58.801+01:00I can confirm that the capacitor fixed it for me a...I can confirm that the capacitor fixed it for me and mine still works 3 months later. It was the defective capacitor that was acting like a resistor against the original one, forcing us to replace it to compensate, until the capacitor became even worse. Just change this capacitor and you'll be OK. Usually it's less easy to measure capacitors, not all multimeters support them. I suggest that you pick one that's installed closed to a large integrated circuit on a board, such as a RAM or microcontroller, usually they are decoupling capacitors and the right value for this (i.e. 0.1uF). If you have an old unused DIMM stick, you might find one on it.Willy Tarreauhttps://www.blogger.com/profile/10872713941638092663noreply@blogger.comtag:blogger.com,1999:blog-4391199926955637123.post-81188595245867131802021-12-05T07:21:08.091+01:002021-12-05T07:21:08.091+01:00hello my synthesizer worked for 2 months after the...hello my synthesizer worked for 2 months after the resistor was re-soldered and died again. Now the screen does not turn on, although it used to turn on for an hour and a half and din. read the corrections with the capacitor and do not know if it will help? I already soldered resistor 103 in place as in the original and nothing. If it's not difficult, please helpAnonymoushttps://www.blogger.com/profile/14795145091397925307noreply@blogger.comtag:blogger.com,1999:blog-4391199926955637123.post-44808124023261089392021-10-29T18:37:49.099+02:002021-10-29T18:37:49.099+02:00Thanks!Thanks!Anonymoushttps://www.blogger.com/profile/02810784045707900867noreply@blogger.comtag:blogger.com,1999:blog-4391199926955637123.post-24148905321328989152021-10-29T18:33:32.387+02:002021-10-29T18:33:32.387+02:00I understood, and that's why I'm suggestin...I understood, and that's why I'm suggesting that in any case you should use 0402 because even if it's not this one it can be adapted. You cannot shorten a larger one to make it touch terminals. So better use the smaller 0402.Willy Tarreauhttps://www.blogger.com/profile/10872713941638092663noreply@blogger.comtag:blogger.com,1999:blog-4391199926955637123.post-45819352981976970782021-10-29T18:28:34.614+02:002021-10-29T18:28:34.614+02:00In the AliExpress 0402 and 0603,I don't know w...In the AliExpress 0402 and 0603,I don't know what is size in the mother boardAnonymoushttps://www.blogger.com/profile/02810784045707900867noreply@blogger.comtag:blogger.com,1999:blog-4391199926955637123.post-9264763426265169242021-10-29T18:20:26.248+02:002021-10-29T18:20:26.248+02:00Just checking on the photo, it looks as large as t...Just checking on the photo, it looks as large as the capacitor is wide, so I would think a 0402 then. Honestly it will not make a big difference. Also in doubt prefer a smaller one than a larger one. The larger one may be difficult to solder while the smaller one can touch both ends by applying a little bit extra solder.Willy Tarreauhttps://www.blogger.com/profile/10872713941638092663noreply@blogger.comtag:blogger.com,1999:blog-4391199926955637123.post-18631698362112331582021-10-29T18:14:26.573+02:002021-10-29T18:14:26.573+02:00Hello.what is the resistor assembly 47 ohm in the ...Hello.what is the resistor assembly 47 ohm in the board?0402 or 0603 size?thak you for replyingAnonymoushttps://www.blogger.com/profile/02810784045707900867noreply@blogger.comtag:blogger.com,1999:blog-4391199926955637123.post-79989278135903180532021-10-26T23:39:20.738+02:002021-10-26T23:39:20.738+02:00This sounds like a defective touch sensor. It'...This sounds like a defective touch sensor. It's a resistive one, so if it got pinched somewhere it can possibly start to react incorrectly. It's also possible that some dust got stuck up between the plastic cover and the touch film on one edge. Maybe try to pass a paper foil under each edge to be sure. And inspect the touch film to be certain it's not damaged. If it is, you will have to change it and to recalibrate it.Willy Tarreauhttps://www.blogger.com/profile/10872713941638092663noreply@blogger.com