Fluke 77 - Manual (Page 58)

Schematic Diagrams 5
5-7
0.22
C 1 3
V D D BT1
9V
1000V,300
C O D E
FUNCTION
INT
INT L O W
HIGH
MA,10A
INT K0 AZ K1 AFO FAO
C O N V E R T E R
FA(-) AFI ACLO ACHI ACA
B3 B1 B2 B0
+VDD
TEST
-VSS
BPR
XTAL2 XTAL1
A N A L O G
P R O C E S S O R
FILTER*
A C
A C A C
AC*
AC*
A C
M O H M S
3V,300K
30V,30K
300V,3K
S O U R C E
VOLTAGE
O H M S
O H M S
DT,OHMS V
X1
X0.3
ACTIVE
FILTER
INTEGRATOR
TO
DIGITAL
SECTION
COMPARATOR
B U F F E R
D 3
D 2
D1
D 0
C 0
N D A V
C L K
C1
C 2
C 3
E C
O H M S
DE-INT
DE-INT
A P 7 5
U1
4 7 P F
C 1 6
TP1
10
C 9
9.20K
R 1 8
32.768KHZ
Y1
4 7 P F
C 1 2
3 3 P F
C 1 5
.027
C 6
20.5K
R17
.027
C 5
R 1 0
1.50M
R
9
1.00M
10
110K 225K
9
8
Z1
.033
C 8
1.00M
R19
0.47
C 7
S1
2.2
C11
S1 S1 LS1
C R 1
BAS16
S1
O N
R A N G E
2 0 %
6 3 V
P C
6 3 V
P C
P P
0.1W
2 5 V
10V
0.5%
5 % 5 %
6 3 V
6V
0.5%
5 %
5 8
14
5 7
4 5 6 7
4 9
5 0
51
5 2
5 6
5 4 5 5 3 2 4 8 8
17 16 2 6 4 6 4 5 4 4 3 9 2 8 2 7 4 0 4 7
5 9
1
6 0
12
6
4
6
5
6
9 6
FLUKE 77-3-1001
aaa10f.eps
Figure 5-1. A1 Main PCA (cont)