So now the only problem remaining is with the last G key ? Did you check the diode related with that key in the keyboard circuit ? ... but ... in ... all ... ...
If you have dismounted the keyboard in the sense that you left the circuit board connected to the main board but removed the membrane, do a continuity test to...
Hello p6ters I have a new chapter... 1) The Key assigner problem is gone (was not a Key assigner problem!). 2 short circuiting cables connecting the keyboard...
Although I can't say for certain as I can check it on a polysix, the transformer should be 4:1 so that the 120v goes to 30v; the caps are rated at 35v which...
If you think you're having power supply issues, the very first thing you should do as a matter of practice on equipment this old is to replace all of the...
Hi Group, this is a long shot, I have a 1976 Korg K-770 which is being restored, Korg UK have advised me that a replacement part is not possible from the...
It would be a surprise for me to find they use the same keys... I tend to think that the 770 should be closer to the MS10/MS20 ... being ... said it...
Hello all, I just found a joy stick on the Doepfer products list that looks pretty much the same than the one in my Trident MK 2. What do you think? Is it the...
Hi Thanks for your reply, yes, I have it confirmed the the keys are different, ie Polysix keys will not fit a 770, back to the drawing board. I am currently...
Hi! I have a few problems with my Polysix. 1. In poly mode: when i'm pressing same note for example 4 times, one sound gets detuned. So 3 sounds are ok 1 is...
MS10/20 keys might work ... different, ie Polysix keys will not fit a 770, back to the drawing board. ... which may be useful for group members ... out more at...
HI, Mr. Toerag! First, the Polysix and Mono/Poly, although contemporaries (ca. 1982? - 1985), are two VERY different machines, meant to do quite different...
Hi Dave, great info, thanks for sharing this! It is unfortunate that those nice devices now become old and tired. My Trident MK2 (which I was gifted!) has a...
Thanks for your replies. Interesting, I was unaware that the Mono/poly has no patch memory. I actually do have a polysix. I bought it just over a year ago. It...
Hello there, ... Better replace the battery SOON! In my Trident MK2 (which tends to suffer from a similar battery issue), the acid had already started eating...
Does the hum sound like 50 or 60 hz (depending on where you live)??? Get a ground-lift adapter. They sell them to plug your grounded (three prong in america)...
... Do not follow this hint. There are good reasons for the ground pins being where they are and in case of a heavy malfunction it might be the person using...
Again, this solution is equal to taping the ground pins and should never ever used permanently. A DI-Box is the solution to this problem. They are inexpensive....
Hello there, my Trident MK2 is defective. Symptom: VCO 1 is defective for one voice. Up to now I was able to found out: Input 1 of IC704 (4x CMOS switch) on ...
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