GE OPTIMA MR360 Service Training page 114

1) The Control Board Assembly gets command signal serially from IRF I/O J23 in CAM-Lite2 cabinet. The
Control Board generates signals needed for control of the following entities:
• The Patient Alignment Laser
• The Bore Light
• The Patient comfort fan relay
• The enable signal needed by the Servo amplifier
• The output relays in the longitudinal motor drive circuit
• Current feedback signal for monitoring the dock motor current
• Communicates status of power supplies and servo amplifier to the CCC board
2) The Servo Amplifier is a Pulse Width Modulated (PWM) device used for powering the longitudinal
motor. DC 42V generated by the control board is the base input voltage. The SRI send command signal
of In and Out or Fast In and Fast Out directly to Servo Amplifier to drive the longitudinal motor.
3) The CAN Core Communication (CCC) board monitors the health of the power supplies and the status
of the servo amplifier, and communicates this information to the host. The CCC board receives power
supply voltages, digital I/O signals, and analog inputs corresponding to the power supply voltages
from the Control Board. The digital I/O of the CCC operates at 3.3V so all logic levels must be converted
to this level on the Control Board. Additionally, the CCC gets an isolated 24V from an external source
for powering the serial interface communications.
3. Block diagram
Signal Table_DC_OK comes from Power Supply for PHPS Lite2. PS for PHPS Lite2 provides DC +42V and
+8V to PHPS Lite2 by J6. The signal is activated when DC +42V is OK.
Signal Mag_DC_OK comes from Power Supply for LED Power Box. PS for LED Power Box provides +15V,
-15V and +24V DC power to LED Power Box and controlled DC +5V to Patient Alignment Laser and Bore
Light. The signal is activated when Power Supply works normally.
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