Figure 31: Spo2 Pcb Schematic Diagram (Sheet 5 Of 7) - Nellcor OxiMax NPB-40 Service Manual

+5
R4
1.00M
+2.5
+5
R6
U10 MAX4053Q
140K
6 16
6
PIC_RB2
INH V C C
+2.5
11
A
10
B
9 14
6 PIC_RC3
C X
12 15
X O Y
13
X 1
4
Z
2
Y0
1
Y1
7
V E E
5
Z0
3 8
Z1 V S S
T32
C68
100P
R24
71.5K
C9
R18
22P
499K +5
C13
R25
100K
0.01U U8
C15
3
6 DET+
+
6
2
6 DET-
-
0.047U
AD820S
+2.5
R38
71.5K
R42 R37 C69
210K 422K
100P
C19
R20 R41 22P
24.9K 76.8K
T41
C24
R45 C25
909 10U 0.01U 0.01U
10V
+2.5
+5
C46
U13 10U
10V
T46
3
+ +
1
PIC_RC0 6
4
- -
R47 LMC7211BIM5
9.09K
NPB-40
+5
+5
U1B
5 U1A
+
2 7
+
4 1
-
6
-
M A X 9 7 0 Q
M A X 9 7 0 Q +5
+5
U1C
11
+
R10
10
-
24.9K
M A X 9 7 0 Q
+5
T3
R12
453K
U1D
13
+
+2.5
15
12
- R15
T1
R17 M A X 9 7 0 Q
49.9K
24.9K
+2.5
C11
470P
+2.5
T25 T27
R19 R21 R22
100K 24.9K 24.9K
+2.5 T26
T125 +2.5
C73
+5 0.1U
6 PIC_RD6
U7A
6 PIC_RD7
2 - 6
6 PIC_RB3
T33
1 11
3 10
+
TLC2262PW +2.5
9
12
13
R63
R30
2
249K
1
237K
5
C71
3
47P
R31 R32 C17
15.8K 15.0K
+2.5
+5
0.022U
U5
16 6
V C C INH
11
PIC_RC3 6
A
10
PIC_RB1 6
B
14 9
X C
C51
PIC_RB2 6
15 12
Y X O
13
X 1
4
Z
2
Y0
1
Y1
7
V E E
5
Z0
8 3
V S S Z1
MAX4053Q
+2.5 +5
T17
C18
0.022U
+
R7
+5 1
+
7
66.5K
8 -
T20
- U25A
R13
LT1013S
RP11
24.9K
T63
R14
47K
200K
C22
0.022U
16
PIC_RB5 6
+5
T15
U2A
13
PIC_RE0
PIC_RB4 6
2 1
T21
T28 MAX4066 S
T24 PIC_RA0
R16
+5
24.9K
+5
U2B
5
U7B
3 4
6
-
7
MAX4066S
5
+
+2.5
TLC2262PW
RP26
C12
3 2
+5
4 1
470P
NO POPULATE +5
U9
16
U2D
INH V C C
A
12
PIC_RA1 6
B
14
C X 10 11
15
X O Y
MAX4066 S
X 1
4
Z
Y0 +5
T31
Y1
7
V E E
Z0 U2C
8
Z1 V S S
6
PIC_RE1 6
MAX4053Q
9 8
R39
MAX4066 S
LED_IDRV 6
15.0K
R40
10.0K
+2.5
+5
T100
C4
0.022U
+2.5
+
R26
3
+
5
75.0K
4 -
U25B
R29
R79
-
LT1013S
150
30.1K
T99
T29
R80
200K
C3
0.022U
R34
249K
T75
+2.5 +2.5
C8
R1
220P 95.3K
T13
T23 R2 T11 C1
RP25
47K 49.9K 0.01U
+5
R8
R3
49.9K
T10
U3A
6
100K
2 -
T19
T18
1
R9
3
+
TLC2262PW
100K
C5 C6
T22
+2.5
0.047U 0.047U
6
+5
+2.5
U6
T7
3
+
6
R76
2
-
49.9K
AD820S
T16
R77
49.9K
+2.5 +2.5
C23
220P R78
499K
T40
T30 T34
C14
R28
RP23
49.9K
0.01U
47K
+5
T42 T43
R33
U11A
2
-
T38 T39
1 100K
R36
3
+
TLC2262PW
100K
R35 C21 C20
+2.5
49.9K
0.047U 0.047U
Notes:
Resistors are 1% 1/16W unless otherwise noted.
T126
R Packs are 5% 1/32W unless otherwise noted.
Technical Discussion
T14
T12
C2
0.01U
+5
+5ANALOG
U3B
U4A
6 -
7 3
+
5 1
+ PIC_RB7 6
TLC2262PW
2
-
TLC3702C
T35 T36
C16
0.01U
+5
+5ANALOG
U11B
6 U4B
-
7 5
+
5 7
+ PIC_RB6 6
TLC2262PW 6
-
TLC3702C
Figure 31
SpO PCB
2
Schematic Diagram
(Sheet 5 of 7)
91