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  • Ride/Crash PCB silkscreen

TR909 clone Nava

  • Ride/Crash parts list

TR909 clone nava

TR909 clone Nava

Let's continue with the bassdrum section. First add resistors. Do not pay attention of resistors type on the picture you certainly have different resistors. RA10B, RA11B, RA12B, RA13B 10Kohm must be a resistor you measure at the beginning of assembly.

nava TR 909 clone ride crash resistors

Add film capacitors. C130, C131, C139 and C147 must be polystyren capacitors.

nava tr 909 clone ride crash caps

Add electrolytic capacitors. Electrolytic capacitors are polarized, the long leg of the capacitors is the positive. Pay attention to orientation in which you solder electrolytic capacitors. The black part on the silkscreened electrolytic capacitor symbol is negative.

nava tr 909 clone ride crash electrolytic caps

Now, add transistors. Pay attention! There are two different type of transistor: 2SA1115 and 2SC2603. Do not mix !

nava tr 909 clone ride crash transistors

Now, check ride/crash section power voltages and add ICs and 28 pins ICs sockets. Do not overheat ICs pins during solder process!

nava tr 909 clone ride crash ICs

Add sound Eprom. Respect colour position. Each Eprom has different sound. You must bend 27C256 pins a little bit to fit in the socket.

nava tr 909 clone ride crash Eprom

Finally, add potentiometers. Pay attention to potentiometers value they are all different. Then ride /crash section is finished, let's go to the sequencer section.

nava tr 909 clone ride crash pots