Fluke PM6681 - Page 122

Unit
1
The main printed-circuit
board (Unit
1)
has recently been rede-
signed due to obsolescence of a number of
integrated circuits.
Designations
found in
circuit
descriptions, schematic diagrams
and parts lists in the first eight
chapters
refer
to
the original de-
sign.
The functional
descriptions are
correct
on
the whole, if you
make a few substitutions. Anew
set
of
schematic diagrams and a
new
replacement parts
list
are included in
this
chapter.
-
Instruments
having
serial numbers
>784919 belong to
the
new
generation.
-
The model
PM6681R/676/AF
has only been
produced with
the new
Unit
1
board, so
the serial
number
is
irrelevant
in
this case.
Replacement
Parts
Pos Description
1
2
8
g
11
12
13
15
28
39
40
54
61
64
66
70
102
205
206
207
208
B1
B2
B3
B4
B5
C1
C10
C100
C101
C102
Cl 03
C104
C106
Cl 07
Cl
08
Cl
09
C11
Clio
cm
C112
C113
CIRCUIT
DIAGRAM PM6681
BAS81
PC-BOARD
PM6681:1
BAS81
NUT
M6M03STFZB
SCREW
MRT3X10STFZB
TX
LOCK
WASHER
AZ3.2 ST FZ
DIN6798A
SPRING
WASHER KBA 3.2 ST
FZ
DIN137
WASHER
BRB 3.2x8x1 ST FZ
LABEL
STATUS
25.4X12.7
POLYIMIDE
TAPE-DOUBLE
COATED 6.4mm
4032
SHIELD
PM6681
SHIELD
COVER PM6681
SCREW
MRT3X06STFZB
TX
CONNECTOR-COAX BNC
SOLDERING
LUG 10.0X15/21
CU SN
TOROID
CORE 30nH RCC9/6/3
4C65 VIOLET
BNC
HOLDER
PM6680,81,85
WASHER
9,5X13X2.3
PM6680,
81.85
CABLE
WZT2801
Green
CABLE
WZT 2801 Grey
STRAP
SST-1M
NATURELL L=102mm
b=2.4
FXFTUBE
3B 4.3x2 L=7.2
CRYSTAL
16MHz
PM5781 HC-49/U
CRYSTAL
10MHz
HC-49U/13
CRYSTALFILTER
100MHz
MF
UB
CRYSTALFILTER
100MHz MF
UB
CRYSTAL
10MHz HC-49U
CAPACITOR
2.00pF 0.5-2pF
300V
CAPACITOR InF
5%
63V NPO
1206
CAPACITOR
lOOnF 10%
63V X7R 1206
CAPACITOR
lOOnF
10%
63V X7R
CAPACITOR
lOOnF
10%
63V X7R
1206
1206
1206
1206
1206
CAPAC TOR
lOOnF 10% 63V X7R
CAPAC TOR
lOOnF
10%
63V X7R
CAPAC TOR
lOOnF
10%
63V X7R
CAPAC TOR
82pF 5% 63V
NPO
1206
CAPAC TOR
82pF 5% 63V
NPO
1206
CAPAC TOR
22pF
5%
63V NPO
1206
CAPAC TOR
lOOnF 10% 63V X7R
1206
CAPAC TOR
lOOnF 10% 63V X7R
1206
CAPACITOR
lOOnF
10%
63V X7R
1206
CAPACITOR
lOOnF 10%
63V
X7R
1206
CAPACITOR
lOOnF 10%
63V
X7R
1206
4031 100
4031 100
4822 505
5322
502
4822 530
4822 530
4031 105
5322 454
1222 100
5322 459
5322 447
4822 502
5322 267
4031 100
5322 526
4031 100
4822 532
731 159
731 159
2422 015
4822 526
5322 242
5322 242
5322 242
5322 242
5322 242
5322
124
4822
122
4822 122
4822 122
4822
122
4822
4822
4822
4822
4822
4822
4822
4822
4822 122
4822 122
4822 122
53030
53050
10758
21644
80082
80173
00120
13144
20001
11185
92204
11658
10004
58390
10545
48830
10222
00002
00003
05037
10097
73307
82118
81692
81692
81694
80335
31746
33496
33496
33496
33496
33496
33496
31839
31839
32482
33496
33496
33496
33496
33496
Pfia
Description,
C114
C115
C116
C117
C118
C119
C12
C120
C121
C122
Cl 25
Cl 26
C127
Cl 28
Cl
29
Cl
3
Cl 30
C131
C132
Cl
33
Cl
34
Cl 35
Cl 36
C137
C138
C139
C14
Cl
40
C143
C144
C145
Cl
46
C147
C148
C149
C150
C151
C152
C153
C154
C156
C157
CAPACITOR
CAPACITOR
CAPACITOR
CAPACITOR
CAPACITOR
CAPACITOR
CAPACITOR
CAPACITOR
CAPACITOR
CAPACITOR
CAPACITOR
CAPACITOR
CAPACITOR
CAPACITOR
CAPACITOR
CAPACITOR
CAPACITOR
CAPAC
CAPAC
CAPAC
CAPAC
CAPAC
CAPAC
CAPAC
CAPAC
CAPACITOR
CAPACITOR
CAPACITOR
CAPACITOR
CAPACITOR
CAPACITOR
ITOR
ITOR
OR
OR
OR
OR
OR
ITOR
CAPAC
CAPAC
CAPAC
CAPAC
CAPAC
CAPAC
CAPAC
CAPACI , .
CAPACITOR
CAPACITOR
CAPACITOR
lO.OpF 1.8-1 OPF
300V 5322
15.0pF
2%
100V
NPO
2M
4822
15.0pF 2%
100V
NPO
2M
4822
1nF5%63VNP0
1206 4822
lOOnF
10%
63VX7R 1206
4822
lOOnF 10%
63VX7R
1206 4822
1nF5%63VNP0
1206 4822
15
uF
20%6.3V
6.0X3.2
MOLD 5322
lodnF 10%
63VX7R
1206 4822
lOOnF 10%
63VX7R
1206 4822
lOOnF 10%
63VX7R 1206 4822
lOOnF 10%
63VX7R 1206 4822
lOOnF 10%
63VX7R
1206 4822
lOOnF 10%
63VX7R
1206 4822
lOOnF 10%
63VX7R
1206 4822
lOOnF
10%
63VX7R
1206 4822
lOOnF
10%
63VX7R
1206
4822
lOOnF 10%
63VX7R 1206 4822
lOOnF 10%
63VX7R
1206 4822
lOOnF 10%
63VX7R
1206 4822
10pF5%63VNP0 1206
4822
lOOnF
10%
63VX7R 1206
4822
lOOnF
10%
63VX7R 1206
4822
lOOnF 10%
63VX7R 1206 4822
lOOnF 10%
63VX7R 1206 4822
220pF 5%
63V
NPO
1206 4822
22nF
10% 200V X7R 1206
5322
lOOnF 10%
63VX7R 1206
4822
lOOnF
10%
63VX7R 1206
4822
lOOnF
10%
63VX7R 1206
4822
1
2.0pF
2%
1
00
V NPO 2M
4822
15pF5%63VNP0 1206
4822
lODnF 10%
63VX7R 1206
4822
lOOnF 10%
63VX7R 1206
4822
lOOnF
10%
63VX7R 1206
4822
lOOnF 10%
63VX7R 1206
4822
lOOnF 10%
63VX7R 1206
4822
100nF10%63VX7R 1206
4822
lOOnF 10%
63V X7R 1206
4822
lOOnF
10%
63V
X7R 1206
4822
lOOnF 10%
63VX7R
1206 4822
lOOnF 10%
63V
X7R
1206 4822
125 50049
122 31823
122 31823
122 31746
122 33496
122 33496
122 31746
124 11418
122 33496
122 33496
122 33496
122 33496
122 33496
122 33496
122 33496
122 33496
122 33496
122 33496
122 33496
122 33496
122 31971
122 33496
122
33496
122 33496
122 33496
122 31965
126 14081
122 33496
122 33496
122 33496
122 31056
122 32504
22 33496
22 33496
22 33496
22 33496
22 33496
22 33496
.22 33496
122 33496
122 33496
122 33496
9-4
Appendix,
Replacement Parts