Nellcor NPB-190 Service Manual page 78

G_REDDC
0.015U
Guard Ring CK06
C6
VREF
+10V
13
V+
16
15
14
GND V-
5 4
U13
DG201S
-5V
G_IRDC
Guard Ring
C5
CK06
0.015U
VREF
+10V
13
V+
9
10
11
GND V-
U13 5 4
DG201S
-5V
G_MUX1
G_PWM1
035191
R51 R49
3.32K 3.32K
C55 R45
0.01U 100K
+5.7V
I60
U9
LMC6044S I58
+
R53
3.32K
3 4
+
1
2
-
11
- I59
C46 C45
1000P 0.01U
I61
R55
I54
12.1K R52
100K
+5.7V
U9
TP20
LMC6044S R54
34.8K
C6GUARD +
12 4 I62
+
14
13
-
R56 11
-
15.0K
R50
3.32K
C44
0.01U
I70
I63
R61
3.32K
C51 R46
0.01U 100K
R47
3.32K
I64
+5.7V
I96
U9
LMC6044S I65
+
R59
3.32K
5 4
+
7
6
-
11
-
C47 C49
1000P 0.01U
I68
R57
I69
R62
12.1K
100K
+5.7V
U9
TP21
LMC6044S R58
34.8K
C5GUARD + I67
10 4
+
8
9
-
R48 11
-
15.0K R60
3.32K
C48
0.01U
I71
I57 I56 I55
ZERO-L
REDDC
REDAC
+
C3 C43
0.47U 0.1U
25V
3216
VCC
C52
0.01U
PWM0
REDLED/AV
VCC U3
6 VCC 16
INH
11
A
10
B
9 14
C X
12 15
XO Y
13
X1
4
Z I72
2
Y0
1
Y1
VEE 7
5
Z0
3 VSS 8
Z1
CD4053S
IRDC
IRAC
+
C4 C50
0.47U 0.1U
25V
3216
VREF
14
12
11
13
PWM1
U6
7
74HC00S
REDLED/AV
VREF
U6
74HC00S
14
9
8
10
7
DG201S BYPASS DG201S SPARES
+10V VCC +10V VCC VCC
13
V+
C54 8
0.01U 7
6
+
V- GND
C57
22U 4 5 U13
C53 20V DG201S
0.01U
7343
-5V
-5V
Front End Output Schematic Diagram (3 of 10)
+10V VCC
13
V+
1
2
3
V- GND
4 5 U13
DG201S
-5V
Figure S-5
S-15