Fluke 189II/AN Service Manual page 45

+20V
15MIL
R11
6.2V VR4
MMSZ6V2T1
5%
499K
15MIL
CR2
BAV199
6.2V VR3
15MIL
5% MMSZ6V2T1
15MIL
1
6.2V VR1
MMSZ6V2T1
5%
GND
15MIL S1
12C
8B 12A
6.2V VR2
12B
5% MMSZ6V2T1 LO1
C3 S1
2.5MM 2.5MM
10
VAC mVAC LO 11A
0.022U
34B 34D 11B
GND
1000V
LZ VDC mA uA
RT1
R4
10MM +t 2.5MM
S1
GND
50MIL 50MIL 8A
1.1K
1K
36
20% VDC mVDC R
10%
50MIL 34E
1W
10MM S1 VAC
7 8A
1
LZ
1 GND
INPUT_JACK
S1
RT2
RV3
A1 8B 9
1.1K
+t 910V
A2
P1 20%
mVDC R C/D
2
A3
GRD3
A4
2MM
1
50MIL
GND 1
RV1
10MM
RV2 910V
50MIL
910V
2
S1
2
35
mVDC
6 4B
GND
mVAC
Z1
2.5MM
5
50MIL LZ R C/D LO
1M
1W
+3V
C103 S1
30
31A
VDC mVDC R C/D LO
22P 5%
34C 31B
R1
200V VAC VDC mA uA
100K
Q1
S1
GND
MMBT3904 33 4A
C2
0.47U
MSP_MAJACK LZ2
16V OUT 3C3
R239
499
+3V
Q27
SFH325FA
AGND
R2
200
AVSS
DS2
INFRARED
AP2012F3C
Q2
BSS138 MSP_JACK_DET
IN
3C3
S
INPUT_JACK AVSS
C1
P1 C2 5MM
5MM
C3
65MIL 440MA
C4
GND
33MIL
XAF1 XBF1
AC1
TP26
DB101S
CR14
AVSS
P N
R163
+3V 10.0K
65MIL
E1
0.1%
CR15
65MIL
AC2
GF1B
65MIL 33MIL
R3 S1
3
100K
1 R167
uA
GND
Q3 2
100
MMBT3904 1%
mA
C1
1W
0.47U
MSP_AJACK
OUT 3C3
16V
50MIL
Q24
R165
SFH325FA
1
5%
2.5W
INPUT_JACK
AVSS
D1
P1 D2
5MM
5MM
D3 10A
260MIL
1 2
D4
260MIL 1MM
XAF2 XBF2 R5
50MIL
.010
TP27
2%
INPUT_JACK 1W
M2
WW
B1
P1 B2 65MIL
4 3
B3
B4 260MIL
AGND
E131
GND
SHIELD CONTACT
Q44 R14 10 R271
MMBT5087
15MIL
22.1 +20V
50PPM
5
R262
R236 R12
10.0K 4 V+ 3
1.00K 1.00K
+ -
Q5 15MIL
LO_OHM_ISNS
FDN360P
CR20
E2
BAV199
15MIL
U1
CURRENT
R16
MIRROR
LTC6101 1
S1 V-
R13
4.99K
13A
2
0.1%
+5V
13B
499K
LO*
R268 AVSS AGND1
R15 2.00K
R266
499K
+5V
4.99K
5
R261
U2
3
V+ R267
+
Q11
1
4.99K AD8541
4 MMBT5089
- 4.99K
V-
2
R269
Q10
AVSS
C6 MMBT5087 4.99K
R264 R265
0.047U 22.1K 4.99K
R8 R260
AGND1
50K
0.1% 20.0K
R263
332
AGND1
E4
3
Q12
R49
FDN337N 1
S1
20.0K
2 S
4A 37
LO2
AVSS AVSS
2.5MM R250
AC
10M 0.5W
Z2
E42
1 2
2.5MM DC
10M
Q25
MMBT3904
THERMALLY
BAV199 CONNECT TO
GND GND
CR4 COM TERMINAL
Q8
Q7 VCLAMP
BC817 BC807
AVSS GND
R29
GRD2
1.00K
R166 R168 R169 R170 R171
2MM 2MM
GRD3
1.50M 1.50M 1.50M 1.50M 1.50M
R21 2K
Z2
6 3
GND
1.1M
C16 10P
Q4 Q6 VCLAMP
+5V
BC817 BC807
5% 50V
+20V NOLOAD
Z2
6 4
CR3
BAV199
100K
C18 100P
R37
CR19
BAV199 261K
1% 50V
NOLOAD
Z2
6 5
10K
U3 C22 100P
R36
432K
LM4041-ADJ
3 1% 50V
NOLOAD
5
Z2
6 7
FB
250
2
R28
C7 C31
1U 976K
20%
0.001U 5%
16V
50V
NOLOAD
GND
R6
10.0K
1
800 HZ FILTER
C43
0.0068U
RMS_IN
50V
+5V
0.22U
3 E17
8
R92 R86 R85
U16
3 V+
+
1 LPF_OUT
102K 107K 97.6K
2
-
V-
C40 AD8617
C48
4
390P
0.0027U
5%
5%
50V
50V AVSS
AGND AGND
R57
ACBUF_OUT
Q13
3.09K
FDN337N
R52
S 825
HI_OHMS*
IN 3C3
0.1%
R72
110K
AVSS
1.00K
C17
AVSS
0.1U AGND
R173 R71
50V
24.9K 249K
0.1% 0.1%
C14
0.1U E7
50V
L4
220_OHM
CURRENT SOURCE
C102
0.01U
50V
AC AMP
-
RJ
+
R27
2K
ISRC
R172
INPUT
SWITCHING
1.50M
SENSE
GRD1
DIV
GRD2
R0
GRD3
GRD1
R1
R2
FILTER AMP
+
R3
-
R4
R78
1.00M
C36 C27
0.022U 0.022U
R50
E11
50V 50V
1.00M
+5V +5V
2-POLE 6HZ FILTER X2
U14
R272
C45
10.0M
LTC1968
0.1U 50V
+5V
7 5 RMS_OUT
E12 VDD VOUT E13
C32
C23 5
R87 R93
ACF_IN U18
2 6 4.7U 3 V+
IN1 +
RTN
6V
374K 124K
4
16V -
3 8 C49 V- AD8603
IN2 -EN
2
0.15U
10V
GND AGND
GND
AVSS
AGND 1 4
AGND
IN 3C1 51.1K
AVSS AVSS
R89
RMS_EN*
51.1K
AGND
+5V
16
+5V
VCC
AC_OUT 12 14
A0 A
LPF_OUT
8 13
A1
U5
5
V+
+ R254
ACBUF_INV
7 2 15
OPA2364 B0
B
6 ACBUF_NINV 1
2A1 IN
- 10 B1
V-
3B8
U12
4 RMS_OUT 5 4
C152 C0 C
LO_OHM_ISNS
3
C1
0.033U
AVSS
5%
R56
NOLOAD 74HCT4053
50V
11 LPF_SW
S0
AC_BUF
10
S1
6 9 ACF_SW
E S2
AGND
GND VEE
AVSS 8 7
AVSS AVSS
U9
SCK OSP_SCK
IN 3C1 3B8
OSP_SDI
COMPUTER SDI
IN 3C1 3B8
CS* OSP_CS*
IN 3C1
INTERFACE
OSP_POR*
POR*
IN 3C1
V-
C107
0.1U
16V AVSS
FREQUENCY
COMP_O DC_COMP_OUT
COMPARATOR
+5V +5V
C24
C106 0.01U
V+
0.1U 50V
16V
GND
C25
0.01U
50V
BUFFER AGND
AGND
AVSS
+
BUFFER_O DCAMP_OUT
-
GAIN
+5V
R256
ACBUF_NINV
8
100
U5
3 V+
+
1
OPA2364
2
-
R61 V-
4
0.0
NINV_X1
3C8 IN
AVSS
NINV_FB R270
AGND OUT 3C7
40.2K
NINV_X5
3C8 IN
+5V
C153 C154
R255
0.01U 0.01U
10.0K
50V 50V
AGND
AVSS
AGND
AGND
Figure 7. 189 II/AN System PCA
Schematic Diagrams
E24
1 ACF_OUT
OUT 3D8
R90
RMS_IN
OUT 2C1 3D8 2C1 3D8
AC_OUT
OUT 2C1 3C8 2C1 3C8
E22
ACF_IN
E18
IN 3C1
IN 3C1
IN 3B2
OUT 3C4
E5
OUT 3D8
E132
OUT 2C2 3B8
FLUKE-189II/AN-1001
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