User Manual

SDB670 – SERVICE MANUAL TNM-M-E-0032
May 13 Page 30 TECHNICAL DESCRIPTION
5 TECHNICAL DESCRIPTION
5.1 MMI B OARD
5.1.1 Description
The purpose of the MMI Board is to provide the Man-Machine Interface between the Control Board
and the user.
A I2C interface from the control board controls a General Purpose Input Output (GPIO) device.
The GPIO device controls 12 LEDs for user diagnostics.
5.2 C ONTROL B OARD
5.2.1 Circuit Board Layout
The layout of the Control Board PCB is shown in Figure 9.
Figure 9. Control Board Layout.