Service Manual
482 Pages
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Page 1
Ventilator UI
Theory of Operation
FIGURE 1-70 CPU Board, Bottom View Network Port, J9 PIN
NAME
FUNCTION
1
TX+
Positive End of Transmit Signal
2
TX-
Negative End of Transmit Signal
3
RX+
Positive End of Receive Signal
4
CT1
No Definition
5
CT1
No Definition
6
RX-
Negative End of Receive Signal
7
CT2
No Definition
8
CT2
No Definition
USB Interface, J8 PIN
1 - 58
NAME
FUNCTION
1
VCC
USB Power Supply
2
DM0
USB Data Signal – (Negative)
3
DP0
USB Data Signal + (Positive)
4
GND
Ground
5
VCC
USB Power Supply
6
DM1
USB Data Signal – (Negative)
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A7™ Service Manual
Theory of Operation
Ventilator UI
PIN
NAME
FUNCTION
7
DP1
USB Data Signal + (Positive)
8
GND
Ground
RS-232 Interface, J4
A7™ Service Manual
PIN
NAME
FUNCTION
1
NC
No Connection
2
RXD
RS-232 Receive Signal
3
TXD
RS-232 Transmit Signal
4
NC
No Connection
5
GND
Ground
6
NC
No Connection
7
NC
No Connection
8
NC
No Connection
9
NC
No Connection
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Ventilator Control and Drive
Theory of Operation
1.7
Ventilator Control and Drive
1.7.1
Mother Board The mother board provides signal interfaces for all boards and electrical components.
FIGURE 1-71 Mother Board, Top View
FIGURE 1-72 Mother Board, Bottom View
1 - 60
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A7™ Service Manual
Theory of Operation
Ventilator Control and Drive
VCM Interface, J1 PIN
NAME
FUNCTION
1
SAFE_VALVE
Pressure Relief Valve Drive Signal
2
7VIN
Inspiration Valve Drive Signal
3
INSP_VALVE
Inspiration Valve Drive Signal
4
7VIN_or_5VIN
PEEP Valve Drive Signal
5
PEEP_VALVE
PEEP Valve Drive Signal
6
SOLENOID_VALVE1
Three-way Valve 1
7
SOLENOID_VALVE2
Three-way Valve 2
8
SOLENOID_VALVE3
Three-way Valve 3
9
SOLENOID_VALVE4
Three-way Valve 4
10
PNEUM_PRES_SW
Pneumatic Block Pressure Switch Signal
11
NC
No Connection
12
ACGO_SW
ACGO Tact Switch Signal
13
O2_PRE_SW
O2 Pressure Switch Signal at Gas Supply Inlet
14
MANU_AUTO_SW
Auto/Manual Switch Signal
15
GND
Ground
16
CO2_BYPASS_SW
Circuit CO2 Absorber Canister Signal
17
O2+
O2 Concentration Signal
18
O2-
O2 Concentration Signal
19
TXD_AUX_BRD
VPM Serial Port Transmit Signal
20
RXD_AUX_BRD
VPM Serial Port Receive Signal
21
GND
Ground
22
SDA
IIC Data Signal
23
SCL
IIC Clock Signal
24
VT
Thermal Mass Flow Sensor Temperature Signal
25
VF
Differential Pressure Sensor Flow Signal
26
GND
Ground
27
TXD_MON_BRD
VCM Serial Port Transmit Signal
28
RXD_MON_BRD
VCM Serial Port Receive Signal
29
12V
12V Power Supply
30
GND
Ground
31
5V
VCM Close Pressure Relief Valve Signal
32
5V
5V Power Supply
33
TXD_CALIBRATE
Calibration Serial Port Transmit Signal
34
RXD_CALIBRATE
Calibration Serial Port Receive Signal
35
GND
Ground
36
12V
12V Power Supply
Pneumatic Assembly Interface, J2
A7™ Service Manual
PIN
NAME
FUNCTION
1
7Vout_or_5Vout
Pressure Relief Valve Power Supply
2
SAFE_VALVE
Pressure Relief Valve Drive Signal
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Ventilator Control and Drive
1 - 62
Theory of Operation
PIN
NAME
FUNCTION
3
7Vout
Inspiration Valve Power Supply
4
INSP_VALVE
Inspiration Valve Drive Signal
5
7Vout_or_5Vout
PEEP Valve Power Supply
6
PEEP_VALVE
PEEP Valve Drive Signal
7
ACGO+
Positive End of the ACGO Valve Drive Signal
8
ACGO-
Negative End of the ACGO Valve Drive Signal
9
VBB1
Electromagnet Power Supply
10
GND
Ground
11
12VB_4
Stepper Motor Power Supply
12
GND
Ground
13
12VB_5
Reserved Three-Way Valve Power Supply
14
VBB2
Power Supply of the EFCS VCM CPU And Total Flow Meter Backlight
15
GND
Ground
16
12VB_2
Power Supply of the EFCS VCM
17
GND
Ground
18
VF
Differential Pressure Sensor Flow Signal
19
12VA_4
12 V Power Supply
20
GND
Ground
21
12VB_3
Proportional Valve Power Supply (range: 10.8V~13.2V)
22
GND
Ground
23
ACGO_switch
ACGO Pressure Switch Signal
24
GND
Ground
25
O2_PRE_SW
O2 Pressure Switch Signal at Gas Supply Inlet
26
GND
Ground
27
PNEUM_PRES_SW
Pneumatic Block Pressure Switch Signal
28
GND
Ground
29
MANU_AUTO_SW
Auto/Manual Switch Signal
30
GND
Ground
31
CO2_BYPASS_SW
Circuit CO2 Absorber Canister Signal
32
GND
Ground
33
NC
No Connection
34
GND
Ground
35
O2+
O2 Concentration Signal
36
O2-
Ground
37
LOOP_SW
Circuit Switch
38
GND
Ground
39
NTC_R11
Signal of Thermistor 1
40
NTC_R12
Signal of Thermistor 2
41
NTC_R21
Signal of Thermistor 1
42
NTC_R22
Signal of Thermistor 2
43
HEA_PWR_15V
Heater Drive Voltage Signal
44
HEA_PWR_15V
Heater Drive Voltage Signal
45
GND
Ground
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A7™ Service Manual
Theory of Operation
Ventilator Control and Drive
PIN
NAME
FUNCTION
46
GND
Ground
47
12VA_1
Electronic Flowmeter Power Supply
48
GND
Ground
49
RXD_FLOW_BRD
Electronic Flowmeter Serial Port Receive Signal
50
TXD_FLOW_BRD
Electronic Flowmeter Serial Port Transmit Signal
Display Interface, J3
A7™ Service Manual
PIN
NAME
FUNCTION
1
LCD_EN
Inverter Enable Signal
2
LCD_BR
Inverter Brightness Adjustment Signal
3
RXD_TOUCH_PANEL
Touch Screen Control Board Serial Port Receive Signal
4
TXD_TOUCH_PANEL
Touch Screen Control Board Serial Port Transmit Signal
5
NC
No Connection
6
LED_AC
AC Indicator Light Drive Signal
7
LED_BAT
Battery Indicator Light Drive Signal
8
MAIN_BRD_SDA
CPU Board I2C Signal
9
MAIN_BRD_SCL
CPU Board I2C Signal
10
TXD_KEY
Serial Port Transmit Signal of the Display Interface Board
11
RXD_KEY
Serial Port Receive Signal of the Display Interface Board
12
Lighting
Lighting Control Signal
13
USB+
USB Data Signal+
14
USB-
USB Data Signal-
15
Lighting_12V
Lighting 12 V Power Supply (range: 10.8V~13.2V)
16
12V
12V Power Supply
17
GND
Ground
18
GND
Ground
19
VCC_LCD
Optional Backplane Power Supply or CPU Board Power Supply for Display
20
VCC_LCD
Optional Backplane Power Supply or CPU Board Power Supply for Display
21
GND
Ground
22
GND
Ground
23
LVDS_DATA0+
LVDS Data Difference to Positive Signal 0
24
LVDS_DATA0-
LVDS Data Difference to Negative Signal 0
25
GND
Ground
26
LVDS_DATA1+
LVDS Data Difference to Positive Signal 1
27
LVDS_DATA1-
LVDS Data Difference to Negative Signal 1
28
GND
Ground
29
LVDS_DATA2+
LVDS Data Difference to Positive Signal 2
30
LVDS_DATA2-
LVDS Data Difference to Negative Signal 2
31
GND
Ground
32
LVDS_DATA3+
LVDS Data Difference to Positive Signal 3
33
LVDS_DATA3-
LVDS Data Difference to Negative Signal 3
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Ventilator Control and Drive
Theory of Operation
PIN
NAME
FUNCTION
34
GND
Ground
35
LVDS_CLK+
LVDS Clock Difference to Positive Signal
36
LVDS_CLK-
LVDS Clock Difference to Negative Signal
37
GND
Ground
Infrared Module Rack Interface for Patient Monitor, J4 PIN
NAME
FUNCTION
1
LED_AC
AC Indicator Light Drive Signal
2
3V3_Gasbench
3.3V Power Supply
3
12VA_6
12V Power Supply
4
12VA_6
12V Power Supply
5
GND
Ground
6
GND
Ground
7
RXD_Infrared Comm Board
Infrared Comm Board Serial Port Receive Signal
8
TXD_Infrared Comm Board
Infrared Comm Board Serial Port Transmit Signal
9
12VA_5
12V Power Supply
10
Fan_PWM2
PWM Driver Signal for Fan
11
Fan_State2
State Detection Signal for Fan
12
GND
Ground
13
LED_BAT1
Battery Indicator Light Drive Signal
14
ACGO_State1
ACGO State Detection Signal 1
15
ACGO_State2
ACGO State Detection Signal 2
16
PCON+
Power ON/OFF Circuit 3.3V
17
PCON-
Power ON/OFF Signal
18
TOUCHPAD_5V
5V Power Supply
19
TOUCHPAD_GND
Ground
20
TOUCHPAD_USB+
TOUCHPAD_USB Difference to Positive Signal
21
TOUCHPAD_USB-
TOUCHPAD_USB Difference to Negative Signal
22
12VA_1
12V Power Supply
23
GND
Ground
24
RSVDRXD_AG
Built-in AG Module Receive Signal
25
RSVDTXD_AG
Built-in AG Module Transmit Signal
Calibration Interface, J5
1 - 64
PIN
NAME
FUNCTION
1
NC
No Connection
2
NC
No Connection
3
NC
No Connection
4
NC
No Connection
5
NC
No Connection
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A7™ Service Manual
Theory of Operation
Ventilator Control and Drive
PIN
NAME
FUNCTION
6
12V
12V Power Supply
7
RXD_CALIBRATE
Calibration Serial Port Receive Signal
8
TXD_CALIBRATE
Calibration Serial port Transmit Signal
9
GND
Ground
Anesthetic Ventilator Cooling Fan Interface, J7 PIN
NAME
FUNCTION
1
12VA_3
12V Power Supply
2
RSVD
Reserved
3
FAN1_STATE
Fan Status Signal
4
GND
Ground
Speaker Interface, J8 PIN
NAME
FUNCTION
1
Speak+
Speaker Positive End
2
Speak-
Speaker Negative End
Battery Adaptation Board Interface, J9 PIN
NAME
FUNCTION
1
BAT1+
Battery Voltage
2
NTC1
Battery Internal Thermistor
3
BC1
Battery In-position Signal
4
GND
Ground
5
BAT2+
Battery Voltage
6
NTC2
Battery Internal thermistor
7
BC2
Battery In-position Signal
8
GND
Ground
Power Board Interface, J10
A7™ Service Manual
PIN
NAME
FUNCTION
1
PLAM
Buzzer Drive Signal (drives the buzzer directly)
2
RXD_PWR_BRD
Power Board Serial Port (receives signal)
3
LOOP_SW
Circuit Switch (reflects if the circuit is in position)
4
TXD_PWR_BRD
Power Board Serial Port (transmits signal)
5
NC
Power Board Cooling Fan Drive
6
GND
Ground
7
LED-BAT
Battery Status Indicator Light Drive Output
8
LCD_EN
Backlight Enable Signal
9
LED-AC
AC Status Indicator Light Drive Output
10
LCD_BR
Backlight Brightness Control Voltage
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Ventilator Control and Drive
1 - 66
Theory of Operation
PIN
NAME
FUNCTION (Continued)
11
PCON-
Power ON/OFF Signal, LVTTL Pulse Signal. If this signal is high level, the system is turned on; if this signal is low level, the system is turned off.
12
3.3VBF
3.3V only used for power ON/OFF the machine
13
BAT2+
2# Battery Input, connect to battery positive end
14
GND
Ground
15
BC2F
2# Battery Availability Signal. Low level indicates battery available; high level indicates battery unavailable
16
NTC2
2# Lithium-ion Battery Internal Thermistor Signal
17
BAT1+
1# Battery Input, connect to battery positive end
18
GND
Ground
19
BC1F
1# Battery Availability Signal. Low level indicates battery available; high level indicates battery unavailable
20
NTC1
1# Lithium-ion Battery Internal Thermistor Signal
21
GND
Ground
22
GND
Ground
23
HEA_PWR_15V
Heat Wire Drive Voltage Output
24
HEA_PWR_15V
Heat Wire Drive Voltage Output
25
NTC_R12
Thermistor (for controlling heat wire) Pin 1
26
NTC_R22
Thermistor (for controlling heat wire) Pin 2
27
NTC_R11
Thermistor (for controlling heat wire) Pin 1
28
NTC_R21
Thermistor (for controlling heat wire) Pin 2
29
GND
Ground
30
GND
Ground
31
3V3
3.3V Supply Voltage Output
32
3V3
3.3V Supply Voltage Output
33
5V
5V Supply Voltage Output
34
GND
Ground
35
GND
Ground
36
GND
Ground
37
12VB
#2 12V Power Supply Voltage Output
38
GND
Ground
39
12VB
#2 12V Power Supply Voltage Output
40
12VB
#2 12V Power Supply Voltage Output
41
GND
Ground
42
GND
Ground
43
12VA
#1 12V Power Supply Voltage Output
44
GND
Ground
45
12VA
#1 12V Power Supply Voltage Output
46
12VA
#1 12V Power Supply Voltage Output
47
NC
No Connection
48
15V2
15.2V Supply Voltage Output
49
NC
No Connection
50
15V2
15.2V Supply Voltage Output
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A7™ Service Manual
Theory of Operation
Ventilator Control and Drive
CPU Board Interface, J11
A7™ Service Manual
PIN
NAME
FUNCTION
A1
LCD_VDD
LCD Power Supply
A2
GND
LCD Ground
A3
NC
No Connection
A4
NC
No Connection
A5
RXD_HW_OR_JH
Infrared Backplane or Patient Monitor Receive Signal
A6
TXD_HW_OR_JH
Serial Port Receive SignalInfrared Backplane or Patient Monitor Transmit Signal
A7
GND
Ground
A8
RXD_AG
Built-in AG Module Receive Signal
A9
TXD_AG
Built-in AG Module Transmit Signal
A10
GND
Ground
A11
UIVCC_USB
USB Power Supply
A12
TOUCHPAD_USB+
TOUCHPAD_USB Data Signal +
A13
TOUCHPAD_USB-
TOUCHPAD_USB Data Signal -
A14
GND
Ground
A15
SCL_CPU
CPU Board I2C Clock
A16
SDA_CPU
CPU Board I2C Data
A17
GND
Ground
A18
MAIN_ACGO_CTRL2
ACGO Control Signal 2
A19
NC
No Connection
A20
ACGO_State1
ACGO State Signal 1
A21
NC
No Connection
A22
FAN_STATE2
Fan State Detected Signal 2
A23
FAN_STATE1
Fan State Detected Signal 1
A24
GND
Ground
A25
3V3
CPU Board Main Power Supply
A26
3V3
CPU Board main Power Supply
A27
GND
Ground
A28
GND
Ground
A29
5V
CPU Board Interface Chip Power Supply
A30
5V
CPU Board Interface Chip Power Supply
A31
GND
Ground
A32
GND
Ground
B1
NC
Not Connected
B2
NC
Not Connected
B3
NC
Not Connected
B4
SPK_OUT+
Speaker Drive Signal +
B5
SPK_OUT-
Speaker Drive Signal -
B6
GND
Ground
B7
VGA_Red
VGA Red Signal
B8
VGA_Green
VGA Green Signal
B9
VGA_Blue
VGA Blue Signal
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Ventilator Control and Drive
PIN
1 - 68
Theory of Operation
NAME
B10
VGA_HSYNC
B11
VGA_VSYNC
FUNCTION (Continued) VGA Line Frequency Signal VGA Field Frequency Signal
B12
GND
Ground
B13
TXD_PWR_BRD
Power Board Serial Port Transmit Signal
B14
RXD_PWR_BRD
Power Board Serial Port Receive Signal
B15
GND
Ground
B16
TXD_FLOW_BRD
Fresh Flow Sensor Board Serial Port Transmit Signal
B17
RXD_FLOW_BRD
Fresh Flow Sensor Board Serial Port Receive Signal
B18
GND
Ground
B19
TXD_TOUCH_PANEL
Touch Screen Controller Serial Port Transmit Signal
B20
RXD_TOUCH_PANEL
Touch Screen Controller Serial Port Receive Signal
B21
OUT2
Backup Output
B22
ACGO_State2
ACGO State Signal 2
B23
GND
Ground
B24
NC
No Connection
B25
DISPLAY_USB-
Display Interface Board USB Data Signal-
B26
DISPLAY_USB+
Display Interface Board USB Data Signal+
B27
GND
Ground
B28
NC
No Connection
B29
NC
No Connection
B30
NC
No Connection
B31
NC
No Connection
B32
NC
No Connection
C1
GND
Ground
C2
LVDS-TO0+
LVDS Data Signal
C3
LVDS-TO0-
LVDS Data Signal
C4
GND
Ground
C5
LVDS-TO1+
LVDS Data Signal
C6
LVDS-TO1-
LVDS Data Signal
C7
GND
Ground
C8
LVDS-TO2+
LVDS Data Signal
C9
LVDS-TO2-
LVDS Data Signal
C10
GND
Ground
C11
LVDS-TO3+
LVDS Data Signal
C12
LVDS-TO3-
LVDS Data Signal
C13
GND
Ground
C14
LVDS-TOC+
LVDS Clock Signal
C15
LVDS-TOC-
LVDS Clock Signal
C16
GND
Ground
C17
TXD_MON_BRD
Ventilator Control Board Serial Port Transmit Signal
C18
RXD_MON_BRD
Ventilator Control Board Serial Port Receive Signal
C19
GND
Ground
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A7™ Service Manual
Theory of Operation
Ventilator Control and Drive
PIN
NAME
FUNCTION (Continued)
C20
TXD_AUX_BRD
Auxiliary Ventilator Control Board Serial Port Transmit Signal
C21
RXD_AUX_BRD
Auxiliary Ventilator Control Board Serial Port Receive Signal
C22
GND
Ground
C23
RXD_KEY
Serial Port Receive Signal of the Display Interface Board
C24
TXD_KEY
Serial Port Transmit Signal of the Display Interface Board
C25
GND
Ground
C26
TP_PWR_CTRL
Touch Pad Power Supply Control Signal
C27
MAIN_ACGO_CTRL1
ACGO Valve Control Signal 1
C28
FAN_PWM1
Fan Control Signal
C29
FAN_PWM2
Fan Control Signal
C30
IN1
Backup Input Signal
C31
NC
No Connection
C32
NC
No Connection
Debugging Power ON/OFF Interface, J12 PIN
NAME
FUNCTION
1
PCON+
Power ON/OFF Signal
2
PCON-
Power ON/OFF Signal
Test Point Definition
A7™ Service Manual
DESIGNATOR
NAME
FUNCTION
RANGE (Unit: V)
T1
BAT1
Lithium-ion Battery Voltage 1
Fully charged 12.6±5%
T2
BAT2
Lithium-ion Battery Voltage 2
Fully charged 12.6±5%
T3
LED_BAT
Battery Indicator Light Drive Signal
With battery: 2.5~3.5; Without battery: 0~0.4
T4
TXD_7024
Auxiliary Ventilator Control Board Serial Port Transmit Signal
High level 2.4~5; Low level 0~0.4
T5
TXD_TOUCH
Touch Screen Controller Serial Port Transmit Signal
High level 2.4~5; Low level 0~0.4
T6
RXD_7024
Auxiliary Ventilator Control Board Serial Port Receive Signal
High level 2.4~5; Low level 0~0.4
T7
RXD_TOUCH
Touch Screen Controller Serial Port Receive Signal
High level 2.4~5; Low level 0~0.4
T8
TXD_33209
VPM Serial Port Transmit Signal
High level 2.4~5; Low level 0~0.4
T9
TXD_FLOW
Fresh Flow Sensor Board Serial Port Transmit Signal
High level 2.4~5; Low level 0~0.4
T10
RXD_33209
VPM Serial Port Receive Signal
High level 2.4~5; Low level 0~0.4
T11
RXD_FLOW
Fresh Flow Sensor Board Serial Port Receive Signal
High level 2.4~5; Low level 0~0.4
T12
TXD_POWER
Power Board Serial Port Transmit Signal
High level 2.4~5; Low level 0~0.4
T13
RXD_POWER
Power Board Serial Port Receive Signal
High level 2.4~5; Low level 0~0.4
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Ventilator Control and Drive
1.7.2
Theory of Operation
DESIGNATOR
NAME
FUNCTION
RANGE (Unit: V)
T14
5V
5V Power Supply
4.75~5.25
T15
3.3V
3.3V Power Supply
3.135~3.465
T16
15V2
15.2V Power Supply
14.44~15.96
T17
12V
12V Power Supply
11.4~12.6
T18
P15V
Heater Power Supply
0~15
T19
LED_AC
AC Indicator Light Drive Signal
With AC: 5~3.5; Without AC: 0~0.4
T20
12V1
12V Power Supply
11.4~12.6
T21
12V2
12V Power Supply
11.4~12.6
T22
12V3
12V Power Supply
11.4~12.6
T23
7V
7V Power Supply
6.65~7.35
T24
LCD_EN
LCD Backlight Enable Signal
High level 3.145~3.465; Low level 0~0.3
T25
LCD_BR
LCD Backlight Brightness Adjustment Signal
Brightest 0~1.5; least bright 4.75~5.25
Ventilator Control and Drive Board The monitor subsystem performs pressure and flow detection of the anesthetic ventilator and anesthetic breathing system, valve control, status monitoring collection, accuracy monitoring of pressure and flow inside the circuit, and accuracy control of tidal volume. The monitor subsystem is composed of four boards: monitor signal detection board, valve drive board, ventilator sensor interface board, and VPM (auxiliary ventilator control board).
1 - 70
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Theory of Operation
1.7.2.1
Ventilator Control and Drive
Monitor Signal Detection Board
FIGURE 1-73 Monitor Signal Detection Board, Top View
A7™ Service Manual
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Ventilator Control and Drive
Theory of Operation
FIGURE 1-74 Monitor Signal Detection Board, Bottom View Monitor Signal Detection Board Communication Interface, J1 PIN
NAME
FUNCTION
1
TXD
Serial Port Transmit
2
RXD
Serial Port Receive
3
12V
12V Power Supply
4
GND
Ground
5
GND
Ground
6
12V
12V Power Supply
7
PRST
Pressure Relief Valve Control Signal
8
5V
5V Power Supply
Ventilator Sensor Interface, J3
1 - 72
PIN
NAME
FUNCTION
1
SDA
I2C Data Signal
2
SCL
I2C Clock Signal
3
VT
Thermal Mass Flow Sensor Temperature Signal
4
VF
Thermal Mass Flow Sensor Flow Signal
5
12V
Sensor Power Supply
6
GND
Ground
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A7™ Service Manual
Theory of Operation
Ventilator Control and Drive
VT Calibration Communication Interface, J7 PIN
NAME
FUNCTION
1
TXD_CALIBRATE
Calibration Serial Port Transmit Signal
2
RXD_CALIBRATE
Calibration Serial Port Receive Signal
3
GND
Ground
4
12V
12V Power Supply
Three-way Valve Control Interface, J6 PIN
NAME
FUNCTION
1
12V
Three-way Valve Power Supply
2
SOLENOID_VALVE1
Three-way Valve Control 1
3
12V
Three-way Valve Power Supply
4
SOLENOID_VALVE2
Three-way Valve Control 2
5
12V
Three-way Valve Power Supply
6
SOLENOID_VALVE3
Three-way Valve Control 3
7
12V
Three-way Valve Power Supply
8
SOLENOID_VALVE4
Three-way Valve Control 4
VPM Communication Interface, J5 PIN
NAME
FUNCTION
1
TXD_AUX_BRD
VPM Serial Port Transmit Signal
2
RXD_AUX_BRD
VPM Serial Port Receive Signal
3
GND
Ground
4
12V
12V Power Supply
O2 Cell Detection Interface, J12 PIN
NAME
FUNCTION
1
O2+
O2 Cell +
2
O2-
O2 Cell -
3
GND
Ground
Test Point Definition
A7™ Service Manual
DESIGNATOR
NAME
FUNCTION
RANGE (unit: V)
T1
O2
O2 Concentration Voltage
0~3.5
T2
PP
PEEP Pressure
0.2~4.5
T3
PW
Airway Pressure
0.2~4.5
T6
FM
Ventilator Flow Detection
0.21~5.25
T8
FE
Expiratory Flow Value
0.2~5.5
T9
VAJF3
Offset Voltage
0.602~0.622
T10
10V5
10.5V
10.25~10.75
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Ventilator Control and Drive
1.7.2.2
Theory of Operation
DESIGNATOR
NAME
FUNCTION
RANGE (unit: V)
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
Valve Drive Board
FIGURE 1-75 Valve Drive Board, Top View
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Theory of Operation
Ventilator Control and Drive
FIGURE 1-76 Valve Drive Board, Bottom View Proportional Valve and Pressure Relief Valve Drive Interface, J4 PIN
NAME
FUNCTION
1
7V
Pressure Relief Valve Power Supply
2
SAFE_VALVE
Pressure Relief Valve Control Signal
3
7V
Inspiration Valve Power Supply
4
INSP_VALVE
Inspiration Valve Control Signal
5
7V
PEEP Valve Power Supply
6
PEEP_VALVE
PEEP Valve Control Signal
Power Supply Interface, J2 PIN
NAME
FUNCTION
1
GND
Ground
2
GND
Ground
3
12V
12V Power Supply
Status Monitor Detection Interface, J8
A7™ Service Manual
PIN
NAME
FUNCTION
1
GND
Ground
2
PNEUM_PRE_SW
Circuit block pressure Switch Signal
3
GND
Ground
4
NC
/
5
GND
Ground
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Ventilator Control and Drive
Theory of Operation
PIN
NAME
FUNCTION
6
QUICK_O2_SW
O2 Flushing Pressure Switch Signal
7
GND
Ground
8
CGO_PRE_SW
CGO Switch Signal
9
GND
Ground
10
O2_PRE_SW
O2 Pressure Switch Signal at Gas Supply Inlet
11
GND
Ground
12
MANU_AUTO_SW
Auto/Manual Switch Signal
Test Point Definition
1.7.2.3
DESIGNATOR
NAME
FUNCTION
RANGE (unit: V)
T1
K_OUT1
Status Monitor Signal
0~3.45
T2
K_OUT2
Status Monitor Signal
0~3.45
T3
SAFE
Pressure Relief Valve Signal
0~7
T4
VOC
Reserved DA Output Signal
0~1.2
T5
AD2
Analog Channel Output Signal
0~5
T6
FLOW
Inspiration Valve Control Signal
0~7
T7
PEEP
PEEP Valve Control Signal
0~7
T8
10V
12V Input Signal
10~14
T9
7V
Valve Power Supply
6.65~7.35
T10
SGND
Ground
0
Sensor Interface Board
FIGURE 1-77 Sensor Interface Board, Top View
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Theory of Operation
Ventilator Control and Drive
FIGURE 1-78 Sensor Interface Board, Bottom View Sensor Interface Board Interface, J2 PIN
NAME
FUNCTION
1
MON_BRD_SDA
VCM I2C Data Signal
2
MON_BRD_SCL
VCM I2C Clock Signal
3
VT
Thermal Mass Flow Sensor Temperature Signal
4
VF
Thermal Mass Flow Sensor Flow Signal
5
12V
12V Power Supply
6
GND
Ground
Test Point Definition PIN
NAME
FUNCTION
TP1
3V3
Test 3.3V Power Supply
TP2
5V
Test 5V Power Supply
TP3
5VA
Test Analog 5V Power Supply
1.7.3
Battery
1.7.3.1
Battery Power For A7 anesthesia system: Battery: 11.1V, 4.5Ah×2 Lithium-ion Battery (sealed) Battery Run Time: 90 minutes (new battery) Battery Charge Time: 8 hours max from an initial charge of 10%.
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