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  • IO Board PCB silkscreen

TR909 clone Nava

  • IO Board parts list

TR909 clone nava

Let's continue with the IO board section. First add resistors. Do not pay attention of resistors type on the picture you certainly have different resistors.

nava tr 909 clone io Board resistors

Add film capacitors

nava tr 909 clone io board caps

Add the diode. Diodes are polarized, the black ring must match the symbol silkscreened on the PCB.

nava tr 909 clone io board diode

Now, add the trig out transistor. Pay attention! This is a 2N3906.

nava tr 909 clone io board transistor

Add Din connectors and 6.35mm jacks.

nava tr 909 clone io board connectors

Now, check io board section power voltages and add the 6N138. Do not overheat ICs pins during solder process!

nava tr 909 clone io board IC

Now this is the part of the assembly that i definitly hate: DO WIRES. You must crimp 26 pcs of wire :(

nava tr 909 clone io board wires

Solder wires respecting the way. Cable housing connectors Pin1 must match Pin1 silkscreened on IO board.

Then io board section is finished, let's go to the Master section.

nava tr 909 clone io board finished