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KLM-367a clone calibration issues

KLM-367a clone calibration issues

2014-01-28 by <lighterthanairflight@gmail.com>

Hello, I just recently completed a KLM-367a clone and after installing the board I am having some difficulties calibrating it. I am following the calibration instructions, and have repeated the steps over and over again.


here are the issues I am experiencing.

1. when I adjust VR1. I can get all of the program lights to light up, but when I remove the 56K resistor from the test jig on the KLM376 board Bank D and Program 4 light up instead of Bank A and Program 1. this problem continues on. so even after I adjust VR6 and VR7 once I turn the synth off and back on in steps 7 and 8 the lights that light up initially are bank D and program 4.
I can select program 1 and bank A however.

I have not taken to calibration further than this, but the synth does make sound. the MG is on always. no matter the position of switches/pots oddly I cant even see the MG on CN03-05 for calibration step 3.

anyway... I have looked over the clone board to look for mistakes, but it looks good. any thoughts or advice would be much appreciated!

-steve

RE: KLM-367a clone calibration issues

2014-01-28 by <josh.nursing@gmail.com>

Have you done the mod on Jed's site, a res to take care of as well as a cap to replace if necessary?


https://sites.google.com/site/jedjorgensen/klm367a/images/pcb-bugs-errors


Yash

RE: KLM-367a clone calibration issues

2014-01-29 by <lighterthanairflight@gmail.com>

I did fix the PCB errors. and I have now installed the two 10uf caps for the crystal oscillator, with no difference.

I actually made two klm367 clone boards and both of them have this problem.


-steve

Re: [PolySix] RE: KLM-367a clone calibration issues

2014-01-29 by Ingo Debus

Am 29.01.2014 um 02:59 schrieb <lighterthanairflight@gmail.com> <lighterthanairflight@gmail.com>:

> I have now installed the two 10uf caps for the crystal oscillator

Did you really install 10 uF (microfarads) caps? As I understand it, C22/23 on the KLM-367 board should be 10 pF (picofarads) (or 22 pF for C23). You're off by a factor of one million :-)

Ingo

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