Mallinckrodt NELLCOR NPB-4000 Service Manual page 213

TP42
+12V
4049 TP41 R62
R60 ON/OFF
3 2
10K
100K
1% U11
C44
R61
100K 0.01UF
TP40 1% 10%
VBATSNS
3
3
D26
D24
BAW56
R63
1 2 100K Positive Pulse
1% during original
2 1 4049
battery connection.
VBATSNS
5 4
U11
C51
10UF
1 10%
P2 VBATSNS
2
25V
P2
PWRGND 2 1 C48
SPKR
0.1UF
4 3 VBATSNS
6 5 10%
SYNC/ALARM ON/OFF
PVENB 8 7 PUMPON
R66 TP43
10 9
SILENCE PSOFF
VBATMEAS 12 11 ERLYWRN
10K 1%
SIGRTN 14 13
DCLED 16 15 MAINSLED
18 17 +3.3V
-24V 20 19
22 21
24 23
26 25
28 27
+5V
30 29
+12V 32 31
34 33
C50
36 35
100UF
38 37
10%
40 39 25V
P3
PWRGND
DCSRC
R98
1K 1%
R92 C58 2N3906
10K 0.1UF TP75 R69 TP79
1% 10%
10K 1% 1
TP76 8 2N4401
6
3
3 5
- +V
B/S
7 1
B
R90 TP77 U14 TP78 R93
DCIN
2 GND 2
+ -V
LM311D
1
10K 1% Q23 51 5%
4
R94
C62
R95 C59
10K 0.1UF 10K 0.1UF
1% 10% 1% 10%
PWRGND
D34
2
PWRGND
BAV70
TP44 1
R100
C52
1 = ON
6
100K
1000PF
PWRGND
5 SET 1 0 = Off Request
D Q
TP48
13
TP56
U8
11 3 2
U12 CLK Q
12 CLR U10
1% 1 16 VBATSNS
TP45 Q12 VCC
4013 2 15
4071 4 TP49
Q13 Q10 TP58
3 14
Q14 Q8 R72
TP46 4 13
Q6 Q9
R83
5 12
PWRGND R71 510K 5%
Q5 R TP50
6 11
Q7 PI
100K
7 10
51K 5%
3 Q4 P0 TP51
1% 8 9
D28 GND P0
4060 TP52 1000PF 10% C53 TP57
PWRGND
5kHz oscillator =
2 1
PWRRST about 1 second delay
Q14
ERLYWRN 3 U11
TP53 R70 TP55
1 6 7
PWRGND
1 2 2
51K 5% 4049
2N4401
R64
D6
51K
3
5%
2N3906
ALARM
6
2 4
U12
1 5
3
Q13 4071
TP54 C47
TP47
1000PF 10%
VBATSNS
3
R67 D25 R68
C61
100K 100K
0.01UF
1% 1%
10%
2 1
R81
1K 1%
PWRGND
CVREF
2
Q29 R88 TP29
TP74
MAINSLED
3 51 5%
DCLED
8
VCC
TP83
C57 R87 NE555
SPKR 3
OUT
100UF 1 5%
25V
1
10% GND
C56
10UF
25V
10%
C64
0.1UF
10%
3
TP59
8
1%
TP61
9 SET 13
D Q
U8 TP60
11 CLK Q 12 PWRUP
To sheet 1
CLR
4013
10
4071
2
3 U12 ON
1
+5V
R73
470
5%
TP62
SYNC
To System PS
Q16
3
TP63 R74
1 SYNC/ALARM
2
1K 1%
2N4401
R75
51K
5%
ON
3 VBATSNS
R82
D27
100K
1%
2 1
U11 U11
Q20 TP69 TP86
3 11 12 14 15
TP68
1
4049 4049
2
2N4401 C54
10UF
10%
25V
R84
100K
1%
4049
SILENCE
9 10
U11
VBATSNS
PWRRST
ZVP2106GCT
3
ALARM
S
1
G
TP87
D
2 Q21
R85
1K
1%
TP84
U13
4
RESET R86
7
DISCH 23.7K
1%
2
TRIG TP85
6
THRESH
5
CONT
C55
0.01UF
10%
2 Q22
D
TP72
1 ALARM
G
S
3
ZVN4206GCT
PWRGND
VBATT
2
F9
1A
R76
(PICO)
100K
1%
1
3
TP65
4
U15
SI9928DY
6 5
R77
51
5%
D32
MURS120T3
MOTOR P4 1
TP64
P4 2
(External)
C46 Q19
3
0.01UF
10%
2
2N4401
8 7
U15
PUMPON
2
SI9928DY
R78
1
100K
1%
VBATSNS
PWRGND
14
VCC
6
GND
ALARM
5 D SET 1
Q
U9
3 2 ALARM
CLK
Q
CLR PWRGND
4013
4
VBATSNS
PWRGND
TP70
8
10
U12 11
TP71
9
4071
TP67
NPB-4000/C Power Supply PCB Schematic (Sheet 1 of 2)
Section 17: Drawings
R80
1
PVENB
2.0K 5%
TP66
R79
100K
1%
PWRGND
1
14 14
VDD VDD VCC
U8 U11 U12 U9
VSS VSS GND
7 4013 8 7 7
4049 4071 4013
8
9 SET 13
D Q
U9
12
CLK
Q
CLR
4013
10
Figure 17-3
17-7