Numark D2 Director, Service Manual

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CPU Board
This is the main digital 'engine' of the product featuring an ARM CPU running the system software
and a DSP providing some additional audio processing. The CPU board has the following main
interfaces:
•
3 x USB host ports. One connects to the port on the front of the unit and two connect to the
rear panel.
•
LCD display interface. This connects to the LCD via the I/O board.
•
I2S audio connects to the audio codec on the I/O board.
•
SPI bus for communication between the system CPU and the control board microcontroller.
I/O Board
The I/O board provides the power supply and power control for the system, and the audio codec and
audio output circuitry. It also acts as 'backplane', routing signals between the CPU board and the
control board and LCD module.
Control Board
This board provides a control panel with switches, LEDs, scratch wheels and pitch faders. A
microcontroller interfaces to these controls and communicates with the system CPU via an SPI bus.
LCD Module
A Winstar 320 x 240 LCD module is used for the user interface display.