Mallinckrodt NELLCOR NPB-195 Service Manual page 91

I199
R99
6.49K
PWM_FREQ
I200
R100
10.0K
PWM_VOL
C96
1.0U
20V
RESETL
TP40
TP44
035262
VDD
U39 I95
+
TLC27L2
R132
3 8
+
1.00K
1
2
-
R93 4
-
4.99K
VDD
I218
I236
U39
R98
+
TLC27L2
249K R133
5 8
+ 1.00K
7
6
+ -
R102 4
-
100K
VDD
5 5 U23 R95
10.0K
1
4
2
3 3 TC7S00F
I292 I293
VDD
C92
CR27
0.1U
VC1206
Z5U
5.6V
U24
X9313 EPOT I294
8 8
VCC
7 7 VH 3 3
CS
CTRSTINC 1 1 VW 5 5
INC
CTRSTUP 2 2 6 6
U/ D VL I277
VSS
4 4
R90
12.1K
VDD
C88
+ + + +
C148 C149 C150 C151 0.1U
47U 47U 47U 47U
10V 10V 10V 10V
7343 7343 7343 7343
U26 TH
1 1 6 6
VCC GND1
J13
2 VO1 5 1 1
2 5
VI2
4 4 8 8 2 2
VI4 VO2
7 7 3 3 CON_2R
N.C. GND2
TDA7052A
SPEAKER DRIVER
VDD
3
Q12
4 SI9953
6 5
+10V
TP48 U25
+
LT1013S
4
- 6
5
3
+
2
-
-10V
C87
0.047U
R85
18.2K
I196
+10V
TP49
U25
R84
+ LT1013S
10.0K
8
6
-
7 VEE
1
+
2
-
-10V
Speaker Driver Schematic Diagram
Figure 11-13
11-31