Lithium Grim OmniScreamer, Инструкция по сборке

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OmniScreamer v1.0
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Modifications
OpAmp
Almost all types of dual OpAmps can be used as long as the pinout is the same. Just a few that have
been tested with success (meaning, they sound good). JRC4558(P), JRC4559, OPA2134, TL072, TL082,
JRC 1458, AD712, OPA2604.
Transistors
The buffer transistors can als be 2N3904 or 2N5088. These transistors do have a different pinout
than the 2SC1815. Extra pads added have been added to the PCB to accommodate these pinouts.
Check the pinout of your transistor before you insert then in the corresponding B/C/ or E pad.
Troubleshooting
All PCB’s have been 100% factory e-tested and out of every batch I receive I build an effect to double
check, so there should not be a connection problem on the PCB itself.
The board is not working (at all), what now?
•
Check if your 9V is plugged in correctly (and/or soldered correctly on the board). Pay special
attention to the polarity.
•
Check that you oriented the capacitors, IC’s ,transistors and diodes the right way. SMF, MKT
and ceramic capacitors as well as resistors do not need to be oriented. A likely sign of
incorrect capacitors and/or orientation is when an effect is sputtering, rumbling or
“motorboating”.
•
Check if you used the correct values of the components. For resistors you can look here:
http://www.diyaudioandvideo.com/Electronics/Color/
•
Double and triple check your soldering! A loose or cold solder can be really bad for your
board.
•
Replace the IC and/or transistors, one might be defective. Before doing that first unplug the
9V and wait for 5 seconds.
•
Check that you have good/high grade components. A lot of Chinese sourced parts are fakes
(especially high end opamps, audio capacitors, vintage diodes and transistors) so be careful
that you source your parts from reliable suppliers.