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Page 8 of 114 · 5658 messages matched
2017-05-17 by Florian Anwander
On 16.05.17 06:57 , Johannes Hausensteiner johannes@eclipso.at [PolySix] ... Why this? Why not increase simply R3 or add an 25k Trimmer in series to R3 to make
2017-05-17 by Johannes Hausensteiner
Hi t_tangent2003, Yes, the higher the value the less the headphone amplification. Be aware that headphones do have different sensitivity. It might be good for
2017-05-17 by t_tangent2003@yahoo.co.uk
Hi Johannes, Thank you for the suggestion to swap resistor R4 and R8 from 1K to 3.3K. I have just done this as it was easy to try out and this stops the
2017-05-17 by t_tangent2003@yahoo.co.uk
Hi roberflas, Thanks for the idea. That would certainly work, but then both the headphone output and main output would be turned off when the Output switch is
2017-05-16 by Johannes Hausensteiner
You might want to swap resistors KLM369/R4 and R8 (1k) by 3k3.
2017-05-15 by Bob Grieb
The signals that read the keys are arranged in groups of 8, not 12. If one of those connections is lost, or an IC pin is damaged, then you would expect to lose
2017-05-15 by joppemadsen@gmail.com
Hi all. I m new to the group. I have been a member og the Korg Mono/Poly goup for some years now, and I have very much appreciated the knowledge found there. I
2017-05-15 by Bob Grieb
I suspect that you are looking for a way to bypass all of the circuitry that is not working and simply connect the controls to the things they control. This
2017-05-15 by josh.nursing@gmail.com
Very cool info, Roberflas, thanks. ... Hi, see the electronic diagram, the headphones amplifier is connect befor switch attenuator for the output line. And
2017-05-14 by roberflas@yahoo.com
Oh, Yes, but any switch of this board work as must be. This is my problem and want to loose patch memories, but at least, use the synth in any way, now is
2017-05-14 by Peter Mörck
This may sound obvious, but did you actually try pushing the Manual button? ... On 14 May 2017 at 19:01, roberflas@yahoo.com [PolySix]
2017-05-14 by roberflas@yahoo.com
Hello, I need for one CPU programed for KLM 367, patch manager, CPU board. I live in Barcelona, Spain. Can you send me one? and how much money for the chip an
2017-05-14 by roberflas@yahoo.com
Hi all, I own one polysix with de KLM 367 dead, because battery leak, I try to repair all traces, change ICs 30, 31. repair trimmer for VR6 and VR7, but all
2017-05-14 by roberflas@yahoo.com
Hi, see the electronic diagram, the headphones amplifier is connect befor switch attenuator for the output line. And this is the cause that all polysix have
2017-05-13 by t_tangent2003@yahoo.co.uk
Thank you Yash, I will have a look at those and post back if I find anything. Thanks again. ... Hey t_tangent, I would check the headphones amplifier area:
2017-05-13 by josh.nursing@gmail.com
Hey t_tangent, I would check the headphones amplifier area: KLM-369 and the op amps there, including the feedback resistors: IC1 - 4556, as well as the power
2017-05-13 by t_tangent2003@yahoo.co.uk
I am hopefully getting to the end of fixing up this Polysix, having installed the Kiwisix upgrade kit and power supply board, and have recently completed the
2017-05-12 by josh.nursing@gmail.com
Can you believe I forgot to post about this new issue I have: the MG LED, which normally syncs to the MG Frequency, is perpetually OFF. The MG itself appears
2017-05-12 by josh.nursing@gmail.com
I have a new DMM and a Logic Probe, built a second prototype scope on breadboard (let s just say it s not ready and I don t have a scope:) ) I did socket the
2017-05-12 by josh.nursing@gmail.com
Hey Bob, long time no hear, how are things? OK good to know, I will add some to my next order. Digikey ships fast internally to Canada. Definitely more
2017-05-12 by Bob Grieb
If you have a scope, check every signal that connects to the RAM chip. If you only have a meter, you can check resistance from the RAM signals to other chips
2017-05-12 by Bob Grieb
You can still buy axial lead capacitors. They are more expensive but still available. Check Mouser and DigiKey ... On Fri, 5/12/17, josh.nursing@gmail.com
2017-05-12 by josh.nursing@gmail.com
So after I fixed some grounding issue yesterday, it seems that my Polysix doesn t recall the patches: they re all initialised to random, not-too-usable sounds.
2017-05-12 by josh.nursing@gmail.com
What would be good modern replacement parts for the PSU PCB Filter caps? I rarely see those Caps with leads on each end so I am wondering how to shoe-horn more
2017-05-12 by josh.nursing@gmail.com
So yesterday, I hauled up the Polysix on the workbench and checked this: the hardware jumper connection itself appeared to be robust. However, and I had
2017-05-11 by josh.nursing@gmail.com
Hey Peter, thanks for your reply. Good point about that Demux area. I have done a lot of work in that specific area a good while ago with the help of several
2017-05-11 by Peter Mörck
Woops, IC30 and 31 are buffers , but of course if they are not working properly it also causes funny stuff. Likewise IC 23 and 25 that handle chip select
2017-05-11 by Peter Mörck
Without giving any particular advice, I d say your initial hunch about battery leak damage is most likely correct. Check the ICs right next to where the
2017-05-11 by josh.nursing@gmail.com
No one at all? Could it be a grounding issue?
2017-05-05 by jaydiplock@gmail.com
Yeah stick with it... poor form to criticise, we all have different levels of skill and experience with stuff like this, but we all share the passion for
2017-05-05 by Sylvester Leontiadis
Don’t give up your repair. I am quite sure that anyone who knows will help you. Check if you have done something wrong during checking and let us know. From:
2017-05-05 by 7zlwncpbis4x22jwvkd4oc5hzu2njcsjeup42is6@yahoo.com
Thanks guys. Sorry to have bothered you with my ineptitude.
2017-05-05 by Bob Grieb
I am afraid I must agree with Florian on both points. The ghost images are most likely improper triggering of the oscilloscope. And when I saw your comment
2017-05-05 by Florian Anwander
Hello The ghost images story tells me, that you do not know how to use an oscilloscope correctly, so... ... ... to be honest: It is time to replace the
2017-05-04 by 7zlwncpbis4x22jwvkd4oc5hzu2njcsjeup42is6@yahoo.com
What I am seeing when I put the scope on the output test point on the KLM-366B board is ghost images of the square or triangle wave the synth is producing. The
2017-05-03 by 7zlwncpbis4x22jwvkd4oc5hzu2njcsjeup42is6@yahoo.com
OK. Progress. Got around to replacing the RAM chip (IC32) and this seemed to be the source of my basic problem with restoring this P6. Now all front panel
2017-05-02 by Bob Grieb
OK. Since the voltages are different on all three, at least we know they are not shorted to each other. And not to gnd or 5V. So maybe try changing the
2017-05-02 by peterovesterlund@gmail.com
Thanks Bob, I checked the DC voltage on A,B and C pins on the MUX, and they are stable on 1.9V, 1.5 V and 1.7 V. I tried turning the pots but the values were
2017-05-02 by peterovesterlund@gmail.com
Thanks Malte, I did check that too. Peter
2017-05-02 by Malte Rogacki
One thing to keep in mind: it s not enough to check if the lines have continuity; it s also important to check that they don t have contact to another line.
2017-05-02 by Bob Grieb
The chip could be bad. Another thing you could try would be to (carefully) measure the DC voltage at these three pins with a DMM when the synth is powered.
2017-05-02 by Bob Grieb
The chip could be bad. Another thing you could try would be to (carefully) measure the DC voltage at these three pins with a DMM when the synth is powered.
2017-05-02 by peterovesterlund@gmail.com
Thank you for your answer Bob, I really appreciate it. And it sounds like the problem is somewhere in that area after your description about how A, B and C
2017-04-28 by roberflas@yahoo.com
Ok, thank you very much, go to DL service manual.
2017-04-28 by rnw6ueo2ru3grihf5iabauttna56367yo4n5umk4@yahoo.com
There is an empty 2 pin male connector on the power supply board, KLM-376, and this is where you connect the 56k resistor. Under the Files tab you can
2017-04-28 by roberflas@yahoo.com
Hi, where must be connected de 56K resistor to adjust reset circuit? I have an battery leak KLN367 that i try to repair and need this info. Thank you in
2017-04-28 by jw_dewdney@yahoo.com
here s another. While running through the voice calibration routine - i was not able to get two of my voices in calibration - however it only affects patches
2017-04-28 by jw_dewdney@yahoo.com
hey guys - okay i ve got one for you ... this problem just popped up tonight after messing around a bit with the chord function - I couldnt seem to get back
2017-04-28 by rnw6ueo2ru3grihf5iabauttna56367yo4n5umk4@yahoo.com
Thank you for the reply Johannes. I ve just checked the reset line and all of the components within it test ok. I ve also completed the reset adjustment per
2017-04-27 by t_tangent2003@yahoo.co.uk
Thanks for the offer. Personally I think I am ok at the moment, but will get back to you if that changes :) Cheers