• Sequencer PCB silkscreen

9

• Sequencer parts list

If you get the v1.02 MainBoard, you don't need to solder IC111 and IC114 but both MUX_SH board, refer to this tutorial, IC110 (TL074) has been replaced by IC1 (TL072) and C517, C518 and C519 has been removed.

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

Add film and ceramic capacitors.

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.

Add TM2 and TM3 trimmers. TM2 adjustment is explained in "finished" section

Now connect J2 to J10 (IO Board) to power sequencer section and check sequencer section power voltages (a square indicate +5v on each IC) and add ICs and sockets. Do not overheat ICs pins during solder process!

Add the 16Mhz crystal

Thread red leds in the cherry switches like follow. Respect the orientation of the leds.

Add switches. Pay attention to orientation of which you solder switches. Long legs must match with positive symbol on the silkscreen.

Add Leds. Leds are polarized, the long legs must match the positive symbol silkscreened on the

PCB. First prepare led in the holder. Pay attention to plate the led holder on PCB.

Add the encoder.

Add the LCD. If your LCD is more than 10mm thick you have to solder it on the top side like follow.
First solder pins. We use pins from a pin header.

Then solder the LCD.

Finally, add ICs in our socket (EEPROM, DAC and CPU). Sequencer section is finished, let's go to the IO board section.