Fluke 39 - Page 103

Schematic Diagrams
7
7-7
Figure 7-1. A1 Main PCA (Fluke 39 and 41B) (cont)
A
100NF
C55
A
2N7002
Q12
A
215K
R65
-22V
-22V
U25
LM358DT
VDD
VDD
D
MMBT5087
Q18
U25
LM358DT
-22V
VCC
R69
10.5K
R41
10.5K
D
VCC
R64
205K
VSS
R70
0
R73
0
D D
10K
R75
10
C69
100NF
C50
R31
510K
10QJ030
CR7
D
100NF
C54
D
220
C72
VBT+
T1
100UH
220
C63
A
R48
17.8K
330PF
C51
VCC
VSS
AD820BR
U24
VDD
R86
49.9K
R87
49.9K
100
C67
D
Q8
MMBT3904
R88
12.1
OUT
GND
LV
FC
OSC
CAP+
CAP-
V+
U29
MAX660
VOUT
GND
LV
BOOST
OSC
CAP+
CAP-
V+
U23
LTC1046
VIN
VOUT
TEMP
GND
AD680
U28
9K
Z5
1K
Z5
1K
Z5
9K
Z5
A
OUTIN
GND
LM2936M
U31
15NF
C57
BAT54S
CR4
VCC
R67
15MEG
220NF
C71
R77
220
Q20
MMBT5087
L5
1T
VCC
R63
100K
D
10
C65
100NF
C62
D
Q9
2N7002
10
C66
CR10
BAS16
D
47K
MUN2213
Q11
D
Q13
MMBT6429
R43
27K
A
R44
36K
BP2
BP1
L4
1T
0.1
C48
100
C61
VBT+
R26
6.2K
R34
100K
Q10
TP0610T
A
D
A
VDD
1NF
C73
R62
2.74K
VCC
OUT
GND
TH CV
TRIG
RESET
DISC
TLC555CD
U19
D
C53
10NF
R61
12.1K
VCC
D
100NF
C56
D
D
BAV99
CR8
D
Q4
2N7002
220NF
C52
220NF
C68
-22V
VR1
22V
10
C64
T2
200UH
VBT+
D
100
C70
10NF
C49
V+
GND
CC
VREF
SS
LXSHDN
MAX750
U30
A
4
32
1
43
21
8
7
65
4
3
2
1
81
7263
54
S
G
D
S
G
D
S
G
D
S
G
D
E
C
B
8
7
6
43
2
1
8
7
65
43
2
1
8
7
65
43
2
1
8
7
6
5
4
8
4
3
2
1
8
7632
1
21
21
C2 C1
A
CA
C
A
7
6
4
3
2
6
4
3
2
1%
M
M
PWR_ON
10V
1%
W_DOG*
16V
16V
WIPER
VEE
1%
1%
1%
LCD_PWR
VBT+_SW
10V
VREF
R3
C0
PWR_SW1
PWR_SW2
VBT+_SW
10V
1%
1%
1%
1%
1%
16V
16V
1%
6.3V
6.3V
FLUKE 4X-1021
(5 of 6)