Ventilator Control and Drive Theory of Operation
1 - 74 046-006272-00 A7™ Service Manual
1.7.2.2 Valve Drive Board
FIGURE 1-75 Valve Drive Board, Top View
T11 REF_4V 4.096V Baseline Power Supply 3.096~4.196
T12 1V2 1.2V Baseline Power Supply 1.1~1.3
T13 VADJ_P Offset Voltage 0.602~0.622
T14 FI Inspiratory Flow Value 0.2~5.5
T15 VADJ_FI Offset Voltage 0.602~0.622
T16 TXD1 Serial Port Transmit Signal (to CPU Board) 0~3.3
T17 RXD1 Serial Port Receive Signal (from CPU board) 0~5
T18 TXD2 Serial Port Transmit Signal (for calibration) 0~3.3
T19 RXD2 Serial Port Receive Signal (for calibration) 0~5
T20 VD 7V 6.8~7.6
T21 DVDD 3.3V Digital Voltage 3.15~3.45
T22 AVCC 5V Analog Voltage 4.75~5.25
T23 WDI Watchdog Signal 0~3.3
T24 RST Reset Signal 0~3.3
T25 CLK Clock Signal 0~3.3
T26 SAN1 Signal of Three-way Valve 1 0~12
T27 SAN2 Signal of Three-way Valve 2 0~12
T28 SAN3 Signal of Three-way Valve 3 0~12
T29 SAN4 Signal of Three-way Valve 4 0~12
DESIGNATOR NAME FUNCTION RANGE (unit: V)
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