Datex-Ohmeda 7900 - Figure 8-15 Microcontroller Board Schematic Diagram

8 /Schematics
8-16 7900 Ventilator- 1503-0151-000 1-97
Figure 8-15
Microcontroller board schematic diagram, page 9 of 10
10V
20%
100UF
C58 C50
C49
R3
VR1
LP2952IM
SH1
GIV_ON
R59
1%
2.26K
1/8W
R62
1%
2.26K
1/8W
R63
0.1%
3.4K
1/8W
0.1%
1/8W
R64
10.2K
0.1%
1/8W
R60
10.2K
1/8W
3.4K
0.1%
R1
SH1,6
MECH_VENT_EN
1/8W
1.00K
1%
R14
0.01UF
10%
C126
50V
R157
1%
100K
1/8W
CR8
1N4003
SH8
EXP_FLW
SH8
INSP_FLW
SH4
EXP_RET
SH4
PRES_EXP
SH8
O2_CONC
SH4
O2_RET
SH8
PATIENT
SH4
INSP_RET
SH4
PRES_INSP
AD620AR
U16
C75
10%
0.1UF
50V
C84
10%
0.1UF
50V
AD620AR
U13
50V
0.1UF
10%
C77
50V
0.1UF
10%
C76
U12
AD620AR
C74
10%
0.1UF
50V
C73
10%
0.1UF
50V
U17
AD620AR
C86
10%
0.1UF
50V
C85
10%
0.1UF
50V
HIPRES_SW_NC
R158
1%
200
1/8W
J8
0.1UF
C134
50V
10%
U48
74HC14
10%
35V
C29
4.7UF
3904
Q3
914
CR6
M2
2N7002
R70
1%
1.00K
1/8W
2W
1
0.1%
R4
1/8W
100K
1%
R69
50V
0.1UF
10%
C61
GIV_5V
SH8
GIV_SENS
R71
1%
1.00K
1/8W
R12
1%
1
1/4W
C62
10%
0.1UF
50V
C65
10%
0.1UF
50V
C66
10%
0.1UF
50V
C51
10%
0.1UF
50V
R21
1%
1.00K
1/8W
R19
1%
1.00K
1/8W
C52
10%
0.1UF
50V
U6
AD820AR
J7
R5
1%
26.1K
1/8W
Q1
3906
MJD2955
Q2
1/8W
4.99K
1%
R26
R90
1%
12.1
1/8W
R22
1%
16.5K
1/8W
R20
1%
16.5K
1/8W
SH4
PAT_RET
SH4
O2
SH4
PRES_PAT
1/4W
200
0.1%
R104
R99
0.1%
200
1/4W
1/4W
200
0.1%
R98
1/4W
200
0.1%
R105
CR1
1N4003
FV_DRV
SH1,6
HI_DRIVE_PRES
SH8
FLW_DAC
50V
0.01UF
10%
C59
SH8
MANIFOLD
210PCBM
U60
200
1%
1/8W
R13
1UF
10%
16V
C60
C57
10%
1UF
16V
R6
1%
34.0K
1/8W
M1
IRFZ48 L1
2.2UH
0.88AMP
20%
AD712KR
U3
AD712KR
U1
AD712KR
U1
AD712KR
U3
25V
2.2UF
80/-20%
C1
TP1
TP3
SH8
FLW_SENS
TP2
TP11
J6
5VTAP FBG1G2G3G4
SENSE
VIN VOUT
VREF
ERROR
SHUTDOWN
5
6
12
315
4
169811413
5
2
1
8
3
7
4
6
-15V
+15V
6
4
7
3
8
1
2
5
5
2
1
8
3
7
4
6
6
4
7
3
8
1
2
5
+15V
+15V
+15V
-15V
-15V
-15V
1
2
3
VDD
VDD
1213
+15V
-15V
-15V
-15V
+15V
+15V
+15V
+5.5V
6
4
7
2
3
1
2
+5.5V
+15V_L
COM
OUT
EXC
1
2
3
1
2
3
4
8
1
4
8
2
3 5
6
7
7
6
5
1
2
SWITCH
PRESSURE
HIGH
INLET
VALVE
VALVE
FLOW
NOTE: R3 AND C49-50 ARE NOT INSTALLED