Hardware Configuration; Calibrating The Dacs - Clavia nord lead 3 Service Manual

Hardware configuration

The N3 model (Lead, Rack) is decided by the LCD board. The keyboard version has
one type of LCD board
version has another type of LCD board
They also differ in size.
Hardware versions
Main board
ver. 1.10
I I I I
Important notes
-The latest available OS version will work on all officially released main board versions.
However old OS versions might NOT work on newer main boards.
Always use the latest OS version!

Calibrating the DACs

The Nord Lead 3 is equipped with two stereo D/A converters U39 and U42 running at
18 bits 44,1 kHz. The DACs are calibrated with external trim potentiometers (trimmers)
at the factory for lowest possible distortion.
In some rare cases it might be necessary to perform a new calibration of the DACs.
To perform calibration first read section "Opening the synth".
- Start test Mnb/DAC as described in the "Test Program" section.
- Locate trimmers VR1-VR4 on the main board.
(index corresponding to respective output).
- Calibrate each DAC to lowest possible distortion.
Clavia DMI
with the pitch stick and modulation wheel, while the rack
(69072)
(69076)
BootPROM
v0.24c
Service manual Nord Lead 3 rev. 1.1
with no pitch stick or modulation wheel.
Notes
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