...
| ID | Issue | Fix | date | fixed version |
|---|---|---|---|---|
| 1 | Snare Drum section - | please download v.1.7 build documentation for details. Service advisory: after building the snare you must place a jumper as shown in the pic below, this is shown without parts placed for clarify
bigger picture from me - easier to find the place..
| 17.Dec.2020 | 1.9 build guide |
| 2 | C95/c97 Tom section | swap both against each other | 17 Dec. 2020 | 1.9 buid guide |
| 3 | Psu | if you‘re using the Safety PSU do not connect pin 27 and pin 28 on the F3 cable, otherwise you‘ll create a ground loop. | 17.dec. 2020 | 1.9 build guide |
| 4 | PSU - wrong routing → affects the memory | change the 5.6V zener as shown here:
| 17.Dec. 2020 |
|
Tips:
| ID | Focus | Info |
|---|---|---|
| 1 | Wiring | You can use the MTA100 system from TE connectivity for example - |
| 2 | noisy/hiss | make sure to solder the potentiometer at all pins to have the correct ground - (the ground flow thru the outside pins / it act like a trace/bridge) |
| 3 | MIDI OUT | measure the transistor HFE value for the switchboard Q604 - a gain of 350 should be fine. otherwise it can happen that MIDI OUT doesn't work. you can also mod the MIDI Out : http://www.colinfraser.com/tr909/909mods/909midi.htm |