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TP78
+12V
+12V
R159
88.7K
VREF
+12V
C124
C125
.1%
.1UF
.1UF
R63
TANT
7
5
2.0K
ACROSS U35
U35
2
-5V
SUPPLY
-5V
6
R160
3
-5V
LT1097
51.1K
R23
R158
4
1
8
88.7K
.1%
OFF/ON
+12V
1M
-5V
VCC
U2
16
9
VDD
C
10
C35
B
C21
8
7
11
VEE
A
22UF
6
INH
.1UF
TANT
6
7
8
VSS
ACROSS U6
U6D
3
Z1
-5V
SUPPLY
LTC201
5
Z0
U1D
12
4
1
VREF
Z
Y1
14
2
Y0
13
15
Y
13
LF444
X1
14
12
C40
R2
X
X0
390PF
C1
4053
R17
1M
R25
18PF
TP49
1
3.32K
R26
82.5K
3
2
U6A
+12V
3.32K
R19
LTC201
C24
R1
280K
4
C59
.47UF
182K
U1A
.047UF
11
3
9
R58
1
VREF
3.32K
2
VREF
LF444
R157
1
R24
10
6
U6C
1
511K
LTC201
1
R27
82.5K
C22
14
15
-5V
.047UF
U6B
3.32K
LTC201
SENSOR
TP44
VCC
INPUT
LED DRIVE
C55
R46
.1UF
P1
VREF
10K
5
L1
Q3
R45
9
L2
MMBTA56
4
TP45
12
Q4
10K
8
13
MMBTA56
L-8
3
L3
7
2
2
L4
1
6
L5
R64
1
5
C116
C117
C118
3
Q1
10K
100PF
100PF
100PF
6
DB9F
R48
11
TP47
TP46
MMBTA06
10K
10
9
TP50
R51
C119
VREF
22.1K
100PF
R54
TP48
6.8
Q2
R18
6.04K
MMBTA06
0.1%
R47
RSENS
10K
TO CENTER MTG. HOLE
C5
.01UF
IR/RED
VREF
TP60
U32
R123
R124
2
6
RAW10V
VIN
VOUT
4
5
182
GND
TRIM
1
C95
C12
22UF
LT1021
C6
22UF
.1UF
TP70
R161
GND
Q23
2N3904
10K
+5.7
Q24
VREF
2N3904
+12V
R121
RAW12V
TP61
221
C91
C80
22UF
.1UF
-5V
R122
RAW-5V
TP62
221
C93
C94
22UF
.1UF
NOTES:
1. ALL RESISTORS 1/8W 1% UNLESS OTHERWISE SPECIFIED.
SpO2 ANALOG
+12V
VREF
C122
C23
22UF
TANT
.1UF
ACROSS U11
-5V
SUPPLY
R39
C13
TP81
47.5K
.12UF
C16
R6
C126
100K
U4C
220PF
.12UF
11
Q6
15
U4D
10
R9
R8
VREF
C33
16
12
2N3906
R7
14
C9
100K
100K
OP490SO
1NF
U1C
9
OP490SO
.015UF
100K
8
C14
TP89
CR1
VREF
10
C15
.068UF
LF444
11
TP51
.068UF
1N914
9
U11C
CR3
LTC201
TP52
+12V
1N914
C127
10
C18
VREF
Q7
220PF
R11
R22
VREF
100K
4
100K
12.1K
2N3906
.12UF
C34
1NF
2
U4A
U1B
6
1
R41
R10
7
3
C19
15K
5
OP490SO
.12UF
100K
LF444
R12
TP85
1
C17
100K
C25
3
.068UF
.47UF
R135
3.57K
Q25
-5V
2N3906
OFF/ON
VREF
6
U4B
7
VCC
5
U10
C60
OP490SO
14
6
R42
X0
X
U9A
4.7PF
1
280K
C29
X1
VREF
15
7
.015UF
Y
8
CR2
Y0
TP83
4
LT1013
8
6
Y1
Z
2
U11D
R53
1N914
.068UF
LTC201
Z0
TP90
7
Z1
100K
8
VREF
R31
VSS
C20
R43
INH
C53
CR4
7
C36
A
VEE
20K
12.1K
C39
.1UF
B
16
.1UF
1N914
C
VDD
R50
182K
4053
VCC
.022UF
R52
TP84
100K
C37
R44
.1UF
20K
R5
C38
15K
TP86
TP77
Q5
2N3904
.022UF
C123
22PF
CR12
R49
100K
1N914
CR18
R162
100K
1N914
TP63
VCC
C11
C48
C49
C50
C51
C52
C102
C105
C106
C107
22UF
22UF
22UF
.1UF
.1UF
.1UF
.1UF
.1UF
.1UF
.1UF
TP64
LIGHT SENSOR
VCC
VCC
D8
VTB8442B
Q8
MMBTA13L
TP72
R68
2.2M
R136
VCC
33.2K
C63
.01UF
LTC201
LTC201
2
5
U11B
U11A
TP75
16
1
REDLED/AV
1
3
TP88
4
TP87
TP53
PWM2
SAMPRED
VREF
SAMPIR
OFF/ON
IRLED/AV
REDDC
REDAC
R20
REDDC
IRDC
IRAC
3.32K
R67
C7
RSENS
+5.7
C61
.01UF
TP54
AMB_LIGHT
BAT_VOLT
4
3.32K
.01UF
PR_TEMP
U7A
3
PR_TACH
R29
1
REDAC
2
+
VCC
3.32K
C26
C27
LMC6044
C28
.1UF
.47UF
TP55
ALE
1
1NF
RD
1
WR
R30
AD15
100K
U3
C56
AD14
12
14
.01UF
AD13
R28
R60
X0
X
13
AD12
X1
15
AD11
34.8K
3.32K
Y
2
AD10
Y0
1
4
PWM1
AD9
Y1
Z
AD8
U7C
5
AD7
Z0
8
3
TP56
AD6
Z1
8
AD5
VSS
6
AD4
INH
C58
R40
11
7
LMC6044
AD3
A
VEE
47.5K
10
AD2
B
9
16
.1UF
AD1
C
VDD
TP57
AD0
4053
VCC
R36
REDLED/AV
PWM0
100K
R21
IRDC
C111
3.32K
.01UF
R66
C8
3.32K
.01UF
TP58
U7B
5
R33
7
IRAC
6
+
3.32K
C30
C 31
LMC6044
.1UF
.47UF
TP59
C32
C57
R61
.01UF
3.32K
1NF
ADDRESS DEMUX
/ZERO
U13
AD0
2
VREF
D1
AD1
3
R37
U7D
D2
TP76
13
R57
AD2
4
D3
14
40.2K
AD3
5
34.8K
D4
12
6
AD4
D5
AD5
7
LMC6044
D6
U9B
AD6
8
D7
AD7
9
R56
D8
3
5
PHOTOI
ALE
11
15.8K
C
4
1
LT1013
OC
TP79
TP39
74HC573
R108
TP80
10K
IR/RED
OFF/ON
U33
2
AD8
D1
AD9
3
D2
AD10
4
D3
LEDDIS
AD11
5
D4
AD12
6
D5
RSENS
AD13
7
D6
AD14
8
D7
AD15
9
D8
VBAT
TP73
ALE
11
C
1
OC
R69
TP40
15.8K
74HC573
BATTERY
1%
R109
C108
C109
VOLTAGE
BAT_VOLT
10K
.1UF
.1UF
R70
SENSE
47.5K
C62
1%
.01UF
TEMP SENSOR
U5
1
VCC
VCC
2
PR_TEMP
TEMP
3
GND
C115
LM35
.1uF
DIGITAL SECTION
S2
GO BUTTON
CPU
U31
13
44
PR_HEAD1
VREF
T2CLK/P2.3
12
42
PR_HEAD2
ANGND
T2RST/P2.4
6
33
REDLED/AV
ACH0/P0.0
P2.6/T2U-D
5
38
/ZERO
ACH1/P0.1
P2.7/T2CAPT
7
24
PHOTOI
ACH2/P0.2
HSI0
4
25
ACH3/P0.3
HSI1
11
26
DISP_PHASE
TALIQ PS CTRL
ACH4/P0.4
HSI2/HSO4
10
27
PR_STROBE
R137
ACH5/P0.5
HSI3/HSO5
8
28
SAMPRED
10K
ACH6/P0.6
HSO0
9
29
OFF/ON
ACH7/P0.7
HSO1
15
34
SAMPIR
EXTINT/P2.2
HSO2
14
35
U34
GND
HSO3
39
PWM0
4
P2.5/PWM0
SET1
37
32
PR_PRESENT
2
5
VPP
P1.7/HOLD
D1
Q1
62
31
IRLED/AV
3
6
ALE/ADV
P1.6/HLDA
CLK1
Q1
61
30
PWR_DOWN
RST
1
RD
P1.5/BREQ
RST1
40
23
PWM2
WRL/WR
P1.4/PWM2
41
22
PWM1
10
P1.3/PWM1
SET2
45
21
DISP_LATCH
12
9
P1.2
D2
Q2
46
20
IR/RED
11
8
P1.1
CLK2
Q2
47
19
LEDDIS
13
P1.0
RST2
48
49
10K
R131
VCC
14
7
VCC
VCC
GND
50
43
READY
51
63
74HC74
INST
52
64
RAMEN
BUSWIDTH
53
3
NMI
NMI
54
65
CLKOUT
TP4
55
17
RXD
RXD/P2.1
TP66
56
18
TXD
TXD/P2.0
57
2
EA
EA
58
16
RST
RESET
59
66
TXD
XTAL2
TP65
60
67
RXD
XTAL1
R76
R75
C88
10K
10K
R128
10K
C120
22PF
Y2
100PF
C89
10MHz
22PF
RESET GENERATION
8K X 8 SRAM
VCC
VCC
U14
19
A0
A0
10
11
AD0
Q1
A0
D0
18
A1
A1
9
12
AD1
R72
Q2
A1
D1
17
A2
A2
8
13
AD2
100K
Q3
A2
D2
TP41
16
A3
A3
7
15
AD3
Q4
A3
D3
15
6
16
A4
A4
AD4
Q5
A4
D4
14
A5
A5
5
17
AD5
Q6
A5
D5
13
A6
A6
4
18
AD6
RST
Q7
A6
D6
12
A7
A7
3
19
AD7
Q8
A7
D7
A8
25
A8
A9
24
Q22
A9
A10
21
A10
2N3904
A11
23
A11
A12
2
VCC
A12
RAMEN
20
CS1
26
R133
CS2
WR
27
10K
WE
RD
22
OE
19
A8
Q1
18
A9
Q2
17
A10
Q3
16
A11
Q4
15
A12
Q5
14
A13
TP43
Q6
13
A14
Q7
12
A15
Q8
64K X 16 EPROM
A0
U15
TP5
A1
A1
24
21
AD0
TP6
A0
O0
A2
A2
25
20
AD1
A1
O1
TP7
A3
A3
26
19
AD2
A2
O2
ADDRESS DECODING
TP8
A4
A4
27
18
AD3
A3
O3
TP9
28
17
A5
A5
AD4
TP10
A4
O4
A6
A6
29
16
AD5
TP11
A5
O5
A7
A7
30
15
AD6
A6
O6
TP12
A8
A8
31
14
AD7
WR
A7
O7
TP13
A9
A9
32
11
AD8
RD
A8
O8
TP14
A10
A10
35
10
AD9
TP15
A9
O9
A11
A11
36
9
AD10
TP16
A10
O10
A12
A12
37
8
AD11
A10
A11
O11
TP17
A13
A13
38
7
AD12
A12
O12
TP18
A14
A14
39
6
AD13
TP19
A13
O13
A15
A15
40
5
AD14
TP20
A14
O14
41
4
AD15
A15
O15
ROMEN
ROMEN
3
CE
TP21
22
RD
RD
A12
TP22
OE
2
A13
VCC
VPP
43
A14
VCC
PGM
A15
27C1024L
U30B
A14
3
A15
4
A11
5
74HC10
TO: N-20
AUX PCB
R80
JP8
GO_SW
1
221
2
PR_HEAD1
3
PR_HEAD2
4
PR_STROBE
5
PR_TACH
6
PR_PRESENT
7
8
PWR_DOWN
9
DISP_PHASE
10
DISP_POL
11
DISP_DL
12
RAW10V
13
RAW12V
14
RAW-5V
15
16
DISP_POL
VCC
17
VBAT
18
DISP_DL
19
20
20 HDR
VCC
JP1
L6
BEAD
1
2
SERIAL DATA
3
L7
BEAD
4
PORT
4 HDR
C121
100PF
JP7
1
2
AD15
3
AD14
4
AD13
5
AD12
6
C65
AD11
7
.1UF
AD10
TP42
8
R73
AD9
9
475K
AD8
10
CR10
1N914
AD7
11
R156
AD6
12
475K
AD5
13
AD4
14
AD3
15
AD2
16
AD1
17
AD0
18
EXINEN
19
EXOUTEN
20
20 HDR
TO: N-20
U28
1
15
A
Y0
2
14
B
Y1
AUX PCB
3
13
C
Y2
12
Y3
11
Y4
6
10
DC00-DFFF
G1
Y5
4
9
G2A
Y6
5
7
G2B
Y7
74HC138
U30A
1
E000-FFFF
2
12
RAMEN
13
74HC10
TP74
U30C
6
9
0000-DBFF
10
8
ROMEN
11
74HC10
TP71
10K
R134
VCC
Figure 9-35
Main PCB Schematic Diagram
9-53
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