Re: [korgpolyex] another dead 800 [1 Attachment]
2015-11-30 by Gordonjcp
... Doesn t start up every time? That sounds like evidence, to me... -- Gordonjcp MM0YEQ
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Re: [korgpolyex] another dead 800
2015-11-30 by mmdatech@...
I managed to write a small program to test 8085, 8155 and led drivers by lighting them all at once. It seems to work but the startup is flaky, it doesn t show
Re: [korgpolyex] another dead 800
2015-11-28 by mmdatech@...
Hi Mike, I have attached a screenshot from my logic analyzer showing the IC29 outputs ( channel 0 = Y0 , channel 1 = Y1 and so on ). There are little or no
Re: [korgpolyex] another dead 800
2015-11-28 by Michael Hawkins
Check all of the address and data lines for continuity from the 80C85 and the outputs of IC 23 and IC29. Check for low signals on the outputs of IC29. If you
Re: [korgpolyex] another dead 800
2015-11-28 by mmdatech@...
Thanks for the reply, I ve already checked the 8085 clock out ( 3Mhz ) and Res7.5 signal ( 3000hz ) and replaced the eeprom testing both firmwares posted in
Re: [korgpolyex] another dead 800
2015-11-27 by Michael Hawkins
not necessarily and probably not. Check for master CPU clock and a whole lot more to check after that to get Poly CPU going. Static memory, EPROM, address bus
Re: [korgpolyex] Poly800 DCO 1 does not play the right notes
2015-11-27 by Michael Hawkins
If your patches are still intact after you power off and you have no C cells in the synth, then the battery is good. If you lose your patches after you power
another dead 800
2015-11-27 by mmdatech@...
Hi, I got a dead poly800 with a non working display and power supply sections. After replacing Q1,Q3,Q18, I got the correct voltages on all ic s but still no
Re: [korgpolyex] Poly800 DCO 1 does not play the right notes
2015-11-27 by bagaeta@...
Thank you. Is there any value in replacing that battery with a fresh one? It must be dead by now... Bruno
Re: [korgpolyex] Poly800 DCO 1 does not play the right notes
2015-11-27 by <backshall1@...>
Yes, version 8 has a lithium coin cell soldered in. I don’t think I’ve ever seen a schematic with this revision. I’ve seen KLM-596-2,6,7 and 8 boards and
Re: [korgpolyex] Poly800 DCO 1 does not play the right notes
2015-11-27 by bagaeta@...
Thank you! I m not sure my multimeter is accurate enough to measure the voltage that precisely. But in a fit of desperation I attacked the board with a Q-tip
Re: [korgpolyex] Poly800 DCO 1 does not play the right notes
2015-11-26 by Michael Hawkins
Yes, this can be definitely be fixed with swapping out the main board. But, the detune circuit uses IC17, IC18, IC19 and IC20. I would definitely be checking
Re: [korgpolyex] Poly800 DCO 1 does not play the right notes
2015-11-26 by bagaeta@...
Thank you Mike. I changed the batteries, uploaded the factory presets in the unit, turned the detune off and tested the unit with a tuner, varying the levels
Re: [korgpolyex] Poly800 DCO 1 does not play the right notes
2015-11-25 by Michael Hawkins
That is extremely odd behavior because both DCO1 and DCO2 operate from the same master oscillator but DCO2 has an interval and detune arrangement (parameters
Poly800 DCO 1 does not play the right notes
2015-11-25 by bagaeta@...
Hello, I m a new member here, general synth geek and collector. I recently took delivery of a Poly800 but when I tried it I noticed some strange behavior, with
Re: [korgpolyex] New Member
2015-11-16 by yj_gu@...
Hi I ve taken some photos of my 800: http://tinypic.com/a/29wxac/3 http://tinypic.com/a/29wxac/3 I ll describe them from left to right starting from the top
Re: [korgpolyex] New Member
2015-11-16 by yj_gu@...
Hi Don, the main is marked as a KLM-596-8. I took photos of where mods were removed but have no idea what these mods are called, or where they were connected
3D print examples
2015-11-15 by Grit
Here s a picture of the knob/bezel fitment. Top-bottom: hires replica knob in original bezel, hires 3D bezel and original button in normal black polymer bezel.
Re: [korgpolyex] New Member
2015-11-13 by <backshall1@...>
Let us know what version of main board you have (KLM-596-2, –7 or –8) so we have a better idea of what you should be seeing. Do you know what mods were
New Member
2015-11-12 by yj_gu@...
Hi everyone Thanks for letting me into this group. I ve just recently purchased an unmodded Poly 800 (mods removed). It does not power up. I ve no knowledge
Re: 3D print examples
2015-11-12 by oip_iii@...
the switches syntaur are selling look very close: https://syntaur.com/Items/5232.html https://syntaur.com/Items/5232.html i m assuming the base dimensions and
Re: 3D print examples
2015-11-12 by ultragalore@...
hmmm... it would be a bit of a shame if you d need to manually change the buttons for a different switch, best thing would be if we could find good available
Re: 3D print examples
2015-11-11 by oip_iii@...
looks perfect, ordered a pair! thanks. shapeways tells me it will be a few weeks before they arrive (i m in australia) but will post up some pics when i get
3D print examples
2015-11-11 by Grit
Here s a picture of the knob/bezel fitment. Top-bottom: hires replica knob in original bezel, hires 3D bezel and original button in normal black polymer bezel.
RE: [korgpolyex] Digest Number 2168
2015-11-11 by oip_iii@...
is this the ex800 button bezel? i was about to order a couple of bezel + button combos (free shipping!) but will hold off if they aren t quite right. many
RE: [korgpolyex] Digest Number 2168
2015-11-10 by Grit
I ve got a set in just now, knob is ok, have to fix the bezel a bit, bezel base has to be a bit wider Sent from Yahoo Mail for iPhone On 6 nov. 2015 10:22:55,
Re: EX800 Buttons
2015-11-05 by domgoold@...
so you have to print each one individually? how long,typically, for eg: a knob? can you print in different materials? like, only plastic/a polymer? can you
Re: EX800 Buttons
2015-11-04 by ultragalore@...
Looks like the original one, if that s the case it would fit. I just noticed it s free shipping on Shapeways this week, the code is : FREESHIPNOV I m going to
Re: EX800 Buttons
2015-11-02 by oip_iii@...
oh wow, this is fantastic, thankyou. i wonder if these will fit on the tact switch being sold by syntaur: https://syntaur.com/Items/5232.html
Re: EX800 Buttons
2015-11-01 by ultragalore@...
ok, I added a bunch of colors in the shop
Re: EX800 Buttons
2015-11-01 by domgoold@...
ultragalore, you are a *star* :) can you do them in other colours? :) (what s happened with the rx5 cartridge? available?
Re: EX800 Buttons
2015-11-01 by ultragalore@...
Sorry Pieter... they made me do it, I dismantled the EX800 and measured the bezel as well: Korg EX800 Buttonholder by grit on Shapeways http://shpws.me/KBOz
Re: EX800 Buttons
2015-10-31 by oip_iii@...
it s.. beautiful. thankyou very much, i will definitely order some of these. custom colours! i wonder if it s possible to get the bezel that they sit in?
Re: [korgpolyex] EX800 Buttons
2015-10-31 by Pieter van Adrichem
Happy to have provided the source! Pieter Verstuurd vanaf mijn iPad
Re: [korgpolyex] Re: My second Poly 800 3D part model
2015-10-31 by ultragalore@...
I hope you ve seen my latest post Charlie, maybe the model I just made can be of help. http://shpws.me/KBp9 http://shpws.me/KBp9
Re: [korgpolyex] EX800 Buttons
2015-10-31 by Charles Patten
You are the man, ultragore. Thank you for giving life to my disabled EX8000!! On Sat, Oct 31, 2015 at 1:37 PM, ultragalore@yahoo.com [korgpolyex]
EX800 Buttons
2015-10-31 by ultragalore@...
So I ve visited Pieter today for his EX800 and he was so kind to lend me the apparatus . I ve made some measurements and this is what is comes down to: Knob
Re: new (old) ex800, battery and buttons
2015-10-25 by oip_iii@...
aha yes this makes sense! thankyou! there were some tiny bits of debris in the unit while i was working on it but i didn t have compressed air so couldn t
Re: new (old) ex800, battery and buttons
2015-10-24 by bperkins211@...
probably a sliver of solder or some other small conductive foreign object was laying on a couple traces or component leads.. after moving it around several
Re: new (old) ex800, battery and buttons
2015-10-23 by domgoold@...
definitely fit a battery clip, you ll never get solder to stick on a battery, and it s much better. nice one! congratulations!
Re: new (old) ex800, battery and buttons
2015-10-23 by oip_iii@...
hey daniel and louis thanks, it started working fine again just as mysteriously as it stopped? i don t understand it at all. when it was producing super-low
Re: [korgpolyex] new (old) ex800, battery and buttons
2015-10-23 by Daniel Forró
Maybe memory contents was damaged or lost during replacing the battery? Try to load factory data once more... Daniel Forro
Re: [korgpolyex] new (old) ex800, battery and buttons
2015-10-23 by Louis
Hey, congrats. I think I saw that on eBay, was tempted. Glad it works:) that s how I got mine, was given to me as broken and I thought it was too for ages,
new (old) ex800, battery and buttons
2015-10-23 by oip_iii@...
hey folks just received a for parts/not working ex800 from ebay yesterday. LED lit up but made no sound. after a couple of hours of head scratching, RTFM,
Re: New member Poly800
2015-10-21 by alexis.ouelhadj@...
Thanks to all of you for your advices. I didn t have much time lately to take care of it, but I will let you know how it goes as soon as I m done. Thankfully,
Re: [korgpolyex] Broken EX800?
2015-10-18 by Michael Hawkins
After you send the sysex message, trying changing patches to see if the patches have been loaded into patch memory. The patch that is running at the time that
Re: [korgpolyex] Broken EX800?
2015-10-17 by slushprodukt@...
Thanks. I m sorry to ask an obvious question, but which tool should I use to send the Sysex dump to the EX800? I have tried MIDI-OX, having switched both
Re: [korgpolyex] Broken EX800?
2015-10-17 by slushprodukt@...
Yes, thank you. I ve been trying to load the SysEx file using MIDI-OX - no luck so far!
Re: [korgpolyex] Broken EX800?
2015-10-16 by Michael Hawkins
When the patch data is scrambled, many functions won t work correctly including sawtooth waveform selection. Yes, that link to the EX800.syx factory default
Re: [korgpolyex] Broken EX800?
2015-10-16 by Daniel Forró
Haven t you read my message? I have written about necessity to load SysEx and explained about sawtooth. Daniel Forro On Oct 16, 2015, at 3:07 PM,