Korg Forums

RichB93 wrote: Would it be possible to get a copy of this too please?

Kind regards,
Rich

@Rich: Please check your PM's...

Hi schmoelzel - welcome to the forum! :D A 'normal' working M1/M1R lets you trawl through the PROGS/COMBIS by using the numeric buttons as well as the UP/DOWN buttons... ...so the behaviour of your synth is a bit strange :shock: Have you already tried to reset (initialize) the synth? If not here's ...

Hi Crummy, some years ago I had contact to a guy whose M1 didn't start - here's the outcome he had: I thought you may be interested to hear my experiences with my faulty Korg M1 as we discussed a few months ago? You may remember I thought the main board was faulty and I ended up finding one on ebay ...

Hi Voxneon, I'm not familiar with the Korg 05R/W but I think to change the modes you'll have to send (a) appropriate SYSEX [/i] message(s). Maybe this posts can be helpful (especially the first link)... http://forum.cakewalk.com/OT-Sysex-for-Korg-05Rw-m1185619.aspx http://forum.cakewalk.com/Korg ...

@Skate323k137:

Check your PM's (Private Messages)..

Hi Alex, yes, of course it is possible! :D You just need a sysex file containing those 'classic' patches and send it to your M1REX from a computer via MIDI (i.e. using MidiOx (freeware) ). Set your M1's Global Section as follows: Midi channel : 1 Memory protect : OFF Midi filtering excl : ENA; 100 ...

How did you measure the psu's voltage?

Since it is a switching power unit you can't measure its output voltages 'stand-alone'! Those psu's do need a certain minimum load for proper working. You must connect it to the M1's mainboard, then measure the output voltages...

Hth

Those voltage values are all ok! I don't think that the transformer is faulty. Are those voltages you've measured still present if the synth 'switches off by himself'? Or only when in working order? If they're present under both conditions the problem lies 'behind' the transformer. If that issue ...

Judging from your video: you don't measure correct! That connector goes straight to the transformer where the output voltages are AC ! But your meter is set to DC ! Related to your video you have (from right to left) the colors: red - black - red (for generatiing +12V / -12V) and black(?) - blue ...

Have you already checked the 3 fuses on the power supply board? Depending on your mains voltage those fuses are: 110V - 120V: FU2 &FU3: 1,5A slow blow Fu4: 6,3A slow blow 220V - 240V: FU2 &FU3: 800 mA slow blow Fu4: 3,15A slow blow And don't forget to check the mains fuse FU1 as well: 110V - 120V ...

Here's some posting from this year (2021):
http://www.korgforums.com/forum/phpBB2/ ... 951#798951

Why not trying to PM him (in case you already haven't)...?

Best,
Michael

Ah ok,

glad you solved the issue - thanks for coming back with the solution

Best,
Michael

Hi belzrebuth, to me it sounds as if there's a kind of loose connection somewhere. I suggest to check the solder joints that you have been working on and carefully resolder them if in doubt. You can take a wooden stick, a pencil or a screwdriver's plastic handle and slightly knock onto the pcb(s ...

Hi Frank,

this are the additional waveforms on a M1Ex/M1REx:

The Soundsamples 000 - 099 remain unchanged as
do the Drumsamples 01 - 44

Hi DMBSTUDIO, what made you think that the transformer needs to be replaced? I'm not saying this can't be possible, but I never heard of a defective transformer on one of these synths PSU's... I have a M1 as well as a DX7II-D and already serviced their switching PSU's some time ago - the faulty ...