Mallinckrodt NELLCOR NPB-195 Service Manual page 90

VDD
I285
R140
4.02K
ASLEDDR
I284
R141
4.02K
BIULEDDR
R142
4.02K 2 2
2N3906S
PSLEDDR
Q21
1 1
3 3
I286
I287
R154
249
BK-LT-ON
RESETL
DSPLRDL
VEE
A0
R/WL
DSPLYCSL
FONTSEL
MEMBRANE PANEL CONNECTOR
ONBUTTON
BIULED
SOFTKEY1
SOFTKEY3
CNTRST
UP
ASLED
PBCSL
D[15:0]
AC_OK
AC-LED
ACPWRLED
035262
VDD I323
C97
2 2 0.1U
2N3906S R139
Z5U
Q20 10.0K
1 1
3 3
BK-LT-ON 2
2 2
2N3906S
I289 I290
Q19
1 1
3 3
I288
filter cap for 74HC32
VDD
R137
R138 249
249 C106
0.1U
ASLED
Z5U
BIULED
PSLED U40 74HC32S
9
10
I326
I327
12
13
U40
I113
U40
1
3
2
74HC32S
VDD
ONBUTTON
J8
CON_FLEX16
1 1 2 2 ACPWRLED
3 3 4 4 PSLED
5 5 6 6 SOFTKEY2 SOFTKEY1
7 7 8 8 SOFTKEY2
9 9 10 10 SOFTKEY4 SOFTKEY3
11 11 12 12 DOWN SOFTKEY4
13 13 14 14 ALRMSIL UP
15 15 16 16 DOWN
CNTRST
CR33
ALRMSIL
2 2 1 1
CR32
VC1206
S 2 2 1 1
5.6V
VC1206
5.6V
I324
CCFL inverter
1
CR24 CR25
L5
Q12 1N4934 1N4934 CCFLPWR A1
100UH
SI9953 2 2 1 1 2 2 1 1 1 1 VDD
8 7
TH TH
+ +
C110 C142
47U 47U 2 2 GND1
10V 10V
7343 7343 CXA-L10
Turn off control
R136
L1
+
121
8 C147
C146
0.1U 10U L24
Z5U
16V
R151
121
11 J9
1 1 2 2
DSPLVDD 3 3 4 4 DSPLVEE
74HC32S DSPLR/WL 5 5 6 6 DSPLRDL
DSPLYCSL 7 7 8 8 DSPLA0
9 9 10 RESETL
BD0 11 11 12 BD1
BD2 13 13 14 BD3
BD4 15 15 16 BD5
BD6 17 17 18 BD7
19 19 20
S CON_IDC20
I328
TO DISPLAY
R118
121
DSPDTACSL
VDD
filter cap for
74HC540
C100
0.1U
Z5U
D[15:0]
U34
2 2 18 18 D8 AC_OK
A1 Y1
3 3 17 17 D9
A2 Y2
4 4 16 16 D10
A3 Y3
5 5 15 15 D11
A4 Y4
6 6 14 14 D12
A5 Y5
7 7 13 13 D13
A6 Y6
8 8 12 12 D14
A7 Y7
9 9 11 11 D15
A8 Y8
1
1 1
1G
19 19 AC-LED 2
2G
74HC540S
TH
3 3 J5
1 1
4 4 HV_OUT 2 2
3 3
5 5 4 4
GND2
CON_4L_098
VDD
C99
0.1U
Z5U
R169
121
BD0 RBD0
filter cap for 74HC245
R170
121
BD1 RBD1
R171
121
BD2 RBD2 U50
R172 2 18 D8
121 A1 B1
BD3 RBD3 3 17 D9
A2 B2
R173 4 16 D10
A3 B3
121
BD4 RBD4 5 15 D11
A4 B4
R174 6 14 D12
121 A5 B5
BD5 RBD5 7 13 D13
A6 B6
R175 RBD6 8 12 D14
A7 B7
121
BD6 9 11 D15
A8 B8
R176
121
BD7 RBD7 1
DSPLR/WL
DIR
DSPDTACSL 19
G
74HC245S
BD[7:0]
R143
100K
I299
R101
8.25K
I221
3 3
R144
CR22
VDD 20.0K Q23
1 1 3 3 1 1 2N7002S
2 2
1N914S
I296 I298
5
CR23
4 1 1 3 3
I297
U48
1N914S
3 TC7S00F
3_3V
2 2
2N3906S
1 1 Q22
3 3
I300
R145
68.1
Figure 11-12
Display Driver Schematic Diagram
11-29