Comments on: Korg 01/W “no sound” repair http://hajo.kessener.net/electronics/korg-01w-no-sound-repair/ ... somewhat really new something Mon, 06 Feb 2012 17:38:21 +0000 hourly 1 http://wordpress.org/?v=3.3.1 By: John http://hajo.kessener.net/electronics/korg-01w-no-sound-repair/comment-page-1/#comment-13113 John Thu, 12 Jan 2012 17:24:33 +0000 http://hajo.kessener.net/?p=72#comment-13113 Forgot to ask, what should I check for when the 01 WFD stays on the LOGO or startup screen? The only I can get it to display is the ROM version, but it does nothing else. THanks John Forgot to ask, what should I check for when the 01 WFD stays on the LOGO or startup screen? The only I can get it to display is the ROM version, but it does nothing else.

THanks
John

]]> By: Darren http://hajo.kessener.net/electronics/korg-01w-no-sound-repair/comment-page-1/#comment-13112 Darren Tue, 10 Jan 2012 18:03:58 +0000 http://hajo.kessener.net/?p=72#comment-13112 Did you ever find out the values of these resistors? Darren Did you ever find out the values of these resistors?
Darren

]]> By: John http://hajo.kessener.net/electronics/korg-01w-no-sound-repair/comment-page-1/#comment-13110 John Thu, 29 Dec 2011 21:48:19 +0000 http://hajo.kessener.net/?p=72#comment-13110 Hi, Does anyone have the PN's and website to order the parts for: IC52 and 53, R142 and 143 and DT2 and DT3? Thanks John Hi, Does anyone have the PN’s and website to order the parts for:
IC52 and 53, R142 and 143 and DT2 and DT3?

Thanks
John

]]> By: Hajo http://hajo.kessener.net/electronics/korg-01w-no-sound-repair/comment-page-1/#comment-13105 Hajo Sat, 17 Dec 2011 21:19:43 +0000 http://hajo.kessener.net/?p=72#comment-13105 Hi Niclas, congratulations on your successful 01/W repair and thanks for sharing the information. Concerning the QY-20: Sorry, nothing precise, just the usual recommendations and procedures: visual inspection, checking supply voltages and wirings. This should help at least to narrow down the problem. All the best, Hajo Hi Niclas,

congratulations on your successful 01/W repair and thanks for sharing the information. Concerning the QY-20: Sorry, nothing precise, just the usual recommendations and procedures: visual inspection, checking supply voltages and wirings. This should help at least to narrow down the problem.

All the best,
Hajo

]]> By: niclas http://hajo.kessener.net/electronics/korg-01w-no-sound-repair/comment-page-1/#comment-13101 niclas Tue, 06 Dec 2011 22:28:55 +0000 http://hajo.kessener.net/?p=72#comment-13101 hi i bought a korg 01/wfd with no sound and dimmed display and whining from the switched psu.got sound and resetted it thanks to this site .changed the 100uf caps (all)they have puffed themselves. and a resistor in the near by of 7805 voltstab.found the one of the caps behind the display also puffed. now i wonder if u have a clue what i should look for i a yamaha QY-20 jam/musik maker/arranger.the display just went blank under a session but sound is still there .the only life on the lcd display(no backlite) is a line when i shut it on,then dissapears. hi i bought a korg 01/wfd with no sound and dimmed display and whining from the switched psu.got sound and resetted it thanks to this site .changed the 100uf caps (all)they have puffed themselves. and a resistor in the near by of 7805 voltstab.found the one of the caps behind the display also puffed.
now i wonder if u have a clue what i should look for i a yamaha QY-20 jam/musik maker/arranger.the display just went blank under a session but sound is still there .the only life on the lcd display(no backlite) is a line when i shut it on,then dissapears.

]]> By: Hajo http://hajo.kessener.net/electronics/korg-01w-no-sound-repair/comment-page-1/#comment-13090 Hajo Wed, 16 Nov 2011 20:13:15 +0000 http://hajo.kessener.net/?p=72#comment-13090 Hi Jim, thanks a lot for your detailed feedback and report. See <a href="http://hajo.kessener.net/electronics/korg-01w-sticky-keys-repair/comment-page-1/#comment-121" rel="nofollow">this answer</a> concerning my experiences with editors. Sorry ;-) All the best, Hajo Hi Jim,

thanks a lot for your detailed feedback and report. See this answer concerning my experiences with editors. Sorry ;-)

All the best,
Hajo

]]> By: Hajo http://hajo.kessener.net/electronics/korg-01w-no-sound-repair/comment-page-1/#comment-13089 Hajo Wed, 16 Nov 2011 20:07:49 +0000 http://hajo.kessener.net/?p=72#comment-13089 Hi Kyzee, thanks for your feedback. All the best, Hajo Hi Kyzee,

thanks for your feedback.

All the best,
Hajo

]]> By: Hajo http://hajo.kessener.net/electronics/korg-01w-no-sound-repair/comment-page-1/#comment-13088 Hajo Wed, 16 Nov 2011 20:05:42 +0000 http://hajo.kessener.net/?p=72#comment-13088 Hi Bojan, is there any reaction when you press a button, i.e. when switching from COMBI to PROG mode? If not, then the CPU respectively the "OS" is not working. I would still recommend to thoroughly check the PSU again, then wirings, capacitors, oscillator and EPROMs. Sorry, no distinct and quick help possible from afar. All the best, Hajo Hi Bojan,

is there any reaction when you press a button, i.e. when switching from COMBI to PROG mode? If not, then the CPU respectively the “OS” is not working. I would still recommend to thoroughly check the PSU again, then wirings, capacitors, oscillator and EPROMs. Sorry, no distinct and quick help possible from afar.

All the best,
Hajo

]]> By: Singing Cat Jim http://hajo.kessener.net/electronics/korg-01w-no-sound-repair/comment-page-1/#comment-13084 Singing Cat Jim Mon, 07 Nov 2011 14:41:08 +0000 http://hajo.kessener.net/?p=72#comment-13084 Hi Hajo & J Man, MANY thanks for your repair advice & the excellent photos..I have a M1 and a 01W/fd and the 01 decided to fail last night with all the symptoms you described in the article...sure enough, the caps around the regulators were blasted and one 20ohm o/c..the tracks were ok though (after the spot-on advice regarding cleaning the PCB with IPA)-Unfortunately, I 'lost' all my sounds, but this was ok as I had only 20 variants on the factory patches and brought them back within an hour or so. On thing that did happen to my 01 that your readers may want to know about-when I first got it about a year ago, it appeared dead-no display and apparently no power-checking the main -/+ rails showed them to be ok, as were (at the time) the Sub-PSU voltages on the main board!..having had a load of repairs in that month, I shelved it until I had more time for a diagnosis-when I did get back to it, it was to remove the main (and now known-good) PSU to try & resurrect a client's 01 and prove it was their PSU that was defective (it was an as-u-wait repair!)...before I took out the supply, something told me to power up the 01 with headphones in and Lo!..It WORKED...but only for about 30 secs after which there was a BANG and smoke poured from the floppy-disk unit! Needless to say, I turned off quickly and disconnected/pulled out the (STILL-smoking) floppy-drive...The drive had failed due to the motor seizing and it appears that this had prevented the 01 from powering up properly or at all-once it was disconnected and out, all was well with the 01 until last night's capacitor bang-party...Once again, thanks for the guidance you gave on this page as I have a gig coming up & really needed the 01 for it. All the best! Jim McKenna ps do you know of any Korg 01 librarian/editing software for the Mac that will run on either OS9 or other Classic OS..or at a pinch, OSX?..I have a cracker for the M1 from Spazztech that runs on OS9, but so far no luck on the 01 front. Hi Hajo & J Man,

MANY thanks for your repair advice & the excellent photos..I have a M1 and a 01W/fd and the 01 decided to fail last night with all the symptoms you described in the article…sure enough, the caps around the regulators were blasted and one 20ohm o/c..the tracks were ok though (after the spot-on advice regarding cleaning the PCB with IPA)-Unfortunately, I ‘lost’ all my sounds, but this was ok as I had only 20 variants on the factory patches and brought them back within an hour or so.
On thing that did happen to my 01 that your readers may want to know about-when I first got it about a year ago, it appeared dead-no display and apparently no power-checking the main -/+ rails showed them to be ok, as were (at the time) the Sub-PSU voltages on the main board!..having had a load of repairs in that month, I shelved it until I had more time for a diagnosis-when I did get back to it, it was to remove the main (and now known-good) PSU to try & resurrect a client’s 01 and prove it was their PSU that was defective (it was an as-u-wait repair!)…before I took out the supply, something told me to power up the 01 with headphones in and Lo!..It WORKED…but only for about 30 secs after which there was a BANG and smoke poured from the floppy-disk unit!
Needless to say, I turned off quickly and disconnected/pulled out the (STILL-smoking) floppy-drive…The drive had failed due to the motor seizing and it appears that this had prevented the 01 from powering up properly or at all-once it was disconnected and out, all was well with the 01 until last night’s capacitor bang-party…Once again, thanks for the guidance you gave on this page as I have a gig coming up & really needed the 01 for it.

All the best!

Jim McKenna

ps do you know of any Korg 01 librarian/editing software for the Mac that will run on either OS9 or other Classic OS..or at a pinch, OSX?..I have a cracker for the M1 from Spazztech that runs on OS9, but so far no luck on the 01 front.

]]> By: bab http://hajo.kessener.net/electronics/korg-01w-no-sound-repair/comment-page-1/#comment-13082 bab Thu, 03 Nov 2011 00:01:11 +0000 http://hajo.kessener.net/?p=72#comment-13082 Thanks man Thanks man

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