Nellcor NPB-190 Service Manual page 88

LINE
W2
18GA_BRN
W1
18GA _GRN/YEL
E C2
4700P
250V
TH E
NEUTRAL
W3
R1
18GA_BLU
390K
1/2W
TH
Power Entry
E
MAIN_DC
C11
0.1U
R22
10.0K
U3
R20
1 1
VIN 10.0K
3 3 2 2
GND VOUT
LM35D TH
C10
0.1U
035199
LINE_IN
C3 T2
220P 1 1 15 15
SW1
250V 115V 1 1
TH
230V 3 2 2
T1
3 3 13 13
E3490A 6 6 6 6 12 12
TH
4 5 5
C1
220P 8 8 10 10
EPS2PC3
250V
TH
TH OB24-9
NEUT_IN TH
R2
100M
1/4W TH
DT1
600V TH
ESD Protection
I5
TP1
R11
10.0K
R21
73.2K R12
VREF 10.0K
U1
I3
+
I6 LM358
5 8
+
8 8
7
FAN_CTRL
6 U2
-
4 LM385S
4 4
-
I1
R25
10.0M
I7
AC+
HIGH CURRENT VIAS
F1 BR1
FAC+ 2 2 GBU8B
C6
TH
0.01U
2ASB TH
4 4 1 1
+
3 3 C7
F2 0.1U
FAC-
2ASB TH AC-
C8
0.01U
R24
49.9
1/4W TH
Battery Charge
C4 Q3
I4
100P MPSA56
R9
2 2
1.00K
U1 1 1
+
LM358 R8 3 3
1.00K
2 8
-
1
3 R16
+
4 10.0K
-
I2
1
R3
10.0K
R14
10.0K
I12
I9
R7
CR6
154K
3 3 1 1
1N914S
R6
100K R15
3 3
49.9K
Q4
2 2
2N3904
TH
1 1
R17
10.0K
Q1 TH
2N3904
MAIN_DC
I10 I11
Q5
MPSA56
R19 R4
R5
1.00K 499
1.00K
C5 CR1
1/2W
CR5
15000U TH 1N4702
22V
15V
35V
SMCJ22C
TH TH
R23
10.0K
FAN_CTRL
Main Board
BATT_CHK
MAIN_DC
R10
1.50
1/2W
TH
BATT_OUT
CHG_IN
R13
10.0K
3 3 Q2
IRF9510
1 1
TH
2 2 4
I8
3 3
Q6
Requires Heat Sink
2N7002S
Nellcor # 891196
2 2
CR7
1 1 3 3
CR4
SW2
1N914S MBRS330T3
MTS50B
TH
F3
CHG_OUT
NC
2ASB
BATT_CHK
Fan Control
J1
2 To Fan
1
CON_2L
CR2
22V
SMCJ22C
TH
35V
100U
+
C9
W7
22GA_WHT
W9
22GA_RED
W6
22GA_ORN
W8
22GA_BLK
GND
TP2
BATT+
W4 Battery +
22GA_RED
TH
W5 Battery -
22GA_BLK
Figure S-15
Power Supply Schematic Diagram (1 of 2)
S-35