Fluke 27 - Page 59

Schematic Diagrams
5
5-5
C40
0.22
22
C37
BT1 9V
.033 C21
.47 C20
A
VDD
33PF C17
C50
33PF
32.768KHZ
Y1
CR7 1N4448
P1 P1 P1 P1 P1 P1 P1 P1 P1 P1 P1 P1 P1 P1 P1 P1 P1
ICL7611 AR1
REAR
S1
CR5 1N4007
VDD
110.0K
225.91K
Z1
VDD
5.49K
R37
14.3K
R12
107K R15
VDD
VDD
VSS
PAZ
ACB
OHS AM0
ACFLG
NDAV
VDD
VDD
NRD
NWR
NETWORK INPUT
CONVERTER
AC
A1
FILTER
ACTIVE BUFFER/
INTEGRATOR
A0
XTAL1
XTAL2
B2
B1
B0
B3
BPR1
BPR2
CLK
D0
D1
D2 D3
A3 A2
K1
K0
INT
AZ
FAO
FA-
AFO
AFI
ACLO
ACN
ACP
ACS
BIAS
COM
EC LO TEST AM1 DCS RRS V4 V3 V2 V1 V0
AP25
U1
P1
332K R4 301K R3
VDD
VSS
CW
1K
R7
VDD
SEL
Q12
Q13 SEL1
22 C23
CW
R19 100K
VR1
412K R18
VDD
R10
44.8K
R6
100K
VSS
1.50M
R27
.01 C36
499K R26
.01 C22
A
C43
220PF
C31
0.22
R35
4.7K
R13
1.5M
.027 C19
.027 C18
10PF C41
1.0M
R16
1.0M R28
0.1C39
10PF C42
1.0M
R29
22.6K
R31
22.6K
R32
20.0K
R30
10 C16
0.1
C38
100K
R33
C33
0.22
C32
0.22
2. VDC
2.7VAC
100HZ
DIGITAL BOARD
18
GUARD
GUARD
3 4
1
2 9
1 50 49 48 51
52
54
3 2 56
13
27 37 36 35
31
33
42
43
44
4
7
6
5
60
30
16
29
28
39
40
45
19 15
17
18
55 24
12
14
25
47
23
38
8
53
20
32
34
41
46
59 58
26
21
11
57 9
12 13 14 15
5 6 7 8
17 16
11
8
9
C
50V
2R
3R
4R
6R
7R
8R
9R
50V
C
50V
C
10V
T
C50V
4
2 3
1 5
6
1.23V
8
7
1% 1%
1%
0.25%
0.1%
1% 1%
M 50V
1%
1%
0.25%
1%
50V CC
50V
20%
C
50V
50V M
C 50V 5%5%
C50V
20%
M
50V
10%
10%
50V M
0.25%
10%
M 50V
PP 63V
PC 63V
PC 63V
20%
10%
10%
10% 10%
10
10
10
10V T
20%
20%
22
T 10V
20%
20%
10%
20%
FLUKE 27-1001
aac11f.eps
Figure 5-1. A1 Main PCA (cont)