A7™ Service Manual 046-006272-00 1 - 83
Theory of Operation Electrical Flow Control System
EFCS Monitoring Board, J4
EFCS Monitoring Board, J5
EFCS Monitoring Board Interface, J6
EFCS Monitoring Board Interface, J7
EFCS Monitoring Board Interface, J8
7GND Ground
8GND Ground
PIN NAME FUNCTION
1 CPU_TXD_DEBUG 7129 Serial Port Transmit
2 CPU_RXD_DEBUG 7129 Serial Port Receive
3GND Ground
4FPGA_VPP Power Supply
PIN NAME FUNCTION
1 NC_VALVE+ Three-Way Valve Power Supply
2 NC_VALVE- Negative End of the Three-Way Valve
PIN NAME FUNCTION
1 SOLENOID_VPP Positive End of the Electromagnet
2 VA_STEP Power Supply of the Stepper Motor Drive Chip
3 MOTOR_A1 A1 Connecting Cable of the Stepper Motor
4 MOTOR_A2 A2 Connecting Cable of the Stepper Motor
5 SOLENOID- Negative End of the Electromagnet
6GND Ground
7 MOTOR_B1 B1 Connecting Cable of the Stepper Motor
8 MOTOR_B2 B2 Connecting Cable of the Stepper Motor
PIN NAME FUNCTION
1 P_VALVE+ Proportional Valve Power Supply
2 O2_VALVE- Negative End of the Oxygen Proportional Valve
3 P_VALVE+ Proportional Valve Power Supply
4 AIR_VALVE- Negative End of the Air Proportional Valve
5 P_VALVE+ Proportional Valve Power Supply
6 N2O_VALVE- Negative End of the Nitrous Oxide Proportional Valve
PIN NAME FUNCTION
1 EE_SCL IIC Clock Signal
2 C_DVCC Sensor Power Supply (range: 4.75V~5.25V)
PIN NAME FUNCTION
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