gaston wrote: ↑
Mon Jun 29, 2020 3:55 pm
Maybe I should start trying to fix the #7 pot and take it from there, any tips which components could be involved in that issue?
You mentioned in the previoud post that the #7 pot test ok, how did you test it ?
The only problem now is that you have something crazy going on with the stages control, hence
the dancing green LEDs, so it will be dificult to set the HW test to Stage 7 for testing.
So first we need to fix the dancing green LEDs.
One the panel PCB, orientated with LEDs at the top, viewed from the component side.
Please check for continuity to GND on the top pin of R3 [ please use a GND on the Main PCB ]
Also check for continuity on LHS pin of VR2 [ tempo ] and LHS pin of VR1 [gate time ]
When the HW test mode is stable:
To test #7 pot, I would recomend, starting the seq in HW test mode.
Then use the rotary stages control to set stage 7.
Use a DC meter to check the voltage on D8 and the centre PIN of VR5 [ #7 [pt ]
Also check the reading of the bottom pin of VR5, [ the PIN nearest the LEDs ]