EFM Synthesizers EFM Mad Mouse Pro, Руководство по сборке и настройке, Страница: 11 / 27

Remove the PIC (U5), DAC (U6) and MUX (U9) place them in protective foam
Disconnect the midi-jack
VCO Assembly and Setup
The Q16/Q17 and Q25/Q26 pairs need to be thermally
connected. NOTE: Q16/Q17 and Q25/Q26 are dual
NPNs and may be replaced with 2SC1583s or other dual
NPNs. Place a dab of heat-sink compound on the face of
one transistor. Place the other flat to flat and secure
together with heat-shrink tubing. Solder to the board
bending the leads so there is no pressure on the pair to
separate. The Q13/Q14 pair are PNP/NPN and should be thermally connected with
1K tempco resistor R48. Place a dab of heat-sink compound on the face of
one transistor. Place the other transistor flat to flat and secure together with
heat-shrink tubing. Solder to the board bending the leads so there is no
pressure on the pair to separate. Once soldered cut the heat-shrink off.
Solder R48 into place so that the body of the resistor is in contact with the
transistor pair. Then using a larger size of heat-shrink secure both transistors
and resistor
Install the jumper next to R62 and the jumper next to PAD-C2 and R85. These two jumpers supply power to the analog sections on
the board. As long as these are dis-connected the VCOs, filter, amps and egs will not work.
Run a jumper from PAD-I (keyboard pitch-out) to PAD-T (vco pitch-in)
Replace the PIC (U5), DAC (U6) and MUX (U9)
Connect a 5-pin DIN Jack (midi-in) to Pads E and F.
Connect a midi keyboard set to midi channel 1 to the midi-in jack. Make sure all switches on S2 are off.
Connect your scope or monitor to VCO1 PAD-B2
Plug the transformer in.
You should see/hear a sawtooth wave. The pitch should change when you
play the midi keyboard.