Mallinckrodt Nellcor N-20PA Service Manual page 88

PR_PRESENT
VPRN
11 R143
U36B
PR_HEAD1
13 14.0K
12
LT1017CS
VPRN
R144
R146
1.24K
1
59
4
5
U36A
PR_HEAD2
3
4
LT1017CS
R145
60.4K
VCC VPRN TP77
6
TEST
R106
R142 Q20
150K 2N3904
150K
PR_TACH
Q19
CR29
C127
VCC
100pf 1N914
2N3904
R118
150K
R141
PR_HOME
1K
R147
PR_MEAS
3.32K
R156
1K
R104
VCC
150K
VCC
R105
VCC
150K
CR28 F2
VBAT
130T3 1A
ON BTN
DD BTN
ADV BTN
TP78
TEST
TP79
TEST
TP35 TP36 TP37
TEST TEST TEST
VPRN
TG
HM
DOT4
VPRN
PR_DOT6
PR_DOT5
PR_DOT4
PR_DOT3
PR_DOT2
PR_DOT1
PR_DOT0
PR_MOTOR
TP24 TP27 TP30
VPRN
TEST TEST TEST
TP23 TP26 TP29
PWR_ON
TEST TEST TEST
TP25 TP28
TEST TEST
PR_PRESENT
L8
ON_OFF
L9
R103
ADV
150K
L10
DD
TP31
C122 C121 C120
TEST TP32 TP34
TEST TEST
100PF 100PF 100PF
TP33
VPRN
TEST
C115
0.1UF
Printer Interface Circuit
TO PRINTER PCB
JP9
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
22 HDR
Figure 9-32
9-49