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Fluke Manuals
Measuring Instruments
PM6690
Service manual
Fluke PM6690 Service Manual page 175
Timer/counter/analyzer
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:
Operator's manual
(120 pages)
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Table Of Contents
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Contents
Table of Contents
Troubleshooting
Bookmarks
Table of Contents
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5
D
L4
J11
Not_used
1
DOUT
2
R297
3
C196
C198
4
Not Used
Not Used
Not Used
5
C
6
7
R300
8
Not Used
9
RUBI DI UM
10
OS C.
11
12
13
14
15
16
17
18
19
20
2X10 SMD
J27A
C200
NOT USED MINICOAX-3
Not Used
B
+12VA
A
U24B
C381
U26B
C382
U28B
C383
OPA277
100NF
OPA277
100NF
OPA277
100NF
-12VA
5
4
A[0..23]
U15A
A0
23
2
D0
A0
I/O0
A1
24
4
D1
A1
I/O1
A2
D2
25
5
A2
I/O2
A3
D3
26
7
A3
I/O3
A4
29
8
D4
A4
I/O4
A5
30
10
D5
A5
I/O5
A6
D6
31
11
A6
I/O6
A7
D7
32
13
A7
I/O7
A8
33
42
D8
A8
I/O8
A9
34
44
D9
A9
I/O9
A10
D10
22
45
A10
I/O10
A11
D11
35
47
A11
I/O11
A12
36
48
D12
A12
I/O12
50
D13
I/O13
A13
D14
20
51
BA0
I/O14
A14
D15
21
53
BA1
I/O15
17
CAS
18
RAS
37
CKE
38
CLK
DQM0
15
DQM2
LDQM
DQM1
DQM3
39
UDQM
16
WE
19
CS
K4S561632D
DQM[0..3]
R669
22
H1
+15VU
A[0..23]
DOUT
D[0..31]
D IN
DIN
+3.3VD
RB LOCK
RB LOCK
+3.3V_U4
R299
Not Used
R298
Not Used
C199
10MHZ_RUBIDIUM
Not Used
R302
+5VPO
Not Used
GATEOUT
+5VA
+5VD
POWERON
LOAD TRGLVL B
SPICLK
SPIDATA
+3.3VD
LOAD TRGLVL A
+12VA
-12VA
TRG_LVL_B
+5VA
VREF
TRG_LVL_A
3.5 PLATED
L27
BLM21A102S
R445
1.5K
+5VTR
R10
U24A
3
R6
6
2.2K
2
100
U122
OPA277
C376
C374
22UF-35V
5
100NF
LT1009CD
C375
1nF
+5VTR
U46C
5
11
CL
UPO
12
PDL
C377
DAC
6
CS
7
10
DIn
DOut
8
15UF-6.3V
SClk
MAX5156
C378
1nF
4
3
2
D[0..31]
U16A
A0
23
2
D16
A0
I/O0
A1
D17
24
4
A1
I/O1
A2
D18
25
5
A2
I/O2
+3.3VD
A3
A3
D19
26
7
A3
I/O3
A4
29
8
D20
A4
I/O4
A5
30
10
D21
A5
I/O5
A6
D22
31
11
A6
I/O6
A7
D23
32
13
A7
I/O7
A8
33
42
D24
A8
I/O8
A9
34
44
D25
A9
I/O9
A10
D26
22
45
A10
I/O10
A11
D27
35
47
A11
I/O11
A12
36
48
D28
A12
I/O12
50
D29
I/O13
A13
D30
20
51
BA0
I/O14
A14
D31
21
53
BA1
I/O15
17
CAS
18
RAS
37
CKE
C310
38
C561
C562
CLK
100NF
100uF-6.3V
100uF-6.3V
15
LDQM
39
UDQM
16
WE
19
CS
K4S561632D
C314
C563
C564
100NF
100uF-6.3V
100uF-6.3V
X13
L56
+5VA
BLM41P800S
+3.3VD
+12VA
-12VA
X6
R11
R12
10K
10K
U26A
U46A
2
R566
-
DAC
6
3
3
+
FBA
100
4
RefA
2
OPA277
OutA
C482
NOT USED
MAX5156
X7
R13
R14
10K
10K
+5VTR
U28A
U46B
2
R567
-
DAC
6
14
3
+
FBB
100
13
RefB
15
OPA277
U46D
OutB
C485
C380
MAX5156
NOT USED
100NF
MAX5156
3
2
Main Schematic
1
L66
+3.3VMEM1
BLM41P800S
L67
+3.3VMEM2
BLM41P800S
+3.3VMEM1
C311
C312
C313
C540
C541
C542
C543
C544
100NF
100NF
100NF
100n
100n
100n
1n
1n
U15B
K4S561632D
+3.3VMEM2
C315
C316
C545
C546
C547
C548
C549
C560
100NF
100NF
100NF
100n
100n
100n
1n
1n
U16B
K4S561632D
1
Schematic Diagrams 9-29
D
C
B
A
1
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