User's Manual

123
Service Manual
9-8
1
A
B
C
INPUT
BLOCK
D
X100
7
5
E
6
INPUT B
(grey input)
COMMON
F
(black input)
4n7
500E
C206
R206
100n
C202
ptc
487K487K
R202R201
10n
C248
[4,H7]
PROBE_B
CHANNEL B
120p
C204
511E
R208
4p74p7
C214
C213
511E
R205
4p74p7
C212
C211
2 3
R210
2K15
C205
10u
C216
4p7
R217
215E
C218
4p7
C217
10p
C222
4p7
R216
215E
C221
33p
R218
68E1
AC/DC
C201
22n
R237 R238 R239
56K2 56K2 56K2
R241
215K
50PPM
R242
147K
50PPM
REFATT
REF_BUS
[3,H8]
1n
C2461n
1nC242
C245
50PPM
909K
R243
56K2
R240
26K1K271
R204
4
32
1M
R203
2K15
R209
470p
C207
68E1
R221
33p
C224
464E
R219
4p7
C223
68E1
R225
4p7
C219
10M
R220
10M10M10M
R213R212R21 1
4 5
10
DCBIAS
R214
10M
13
HF0
14
SWHF0
12
GNDHF0
16
HF1
17
SWHF1
15
GNDHF1
19
HF2
18
SWHF2
20
GNDHF2
21
HF3
22
C231 GNDHF3
0p68
35
FB0
R231
1M
C232
50PPM
4p7
37
FB1
R232
100K
C233
50PPM
47p
38
FB2
R233
10K
C234
50PPM
470p
40
FB3
R234
1K
C236
50PPM
4n7
41
FB4
R236
100E
50PPM
39
FBC
1206
42
LF
2
GPROT
36
CALSIG
43
PROTGND
R246
215K
25 26
SDAT SCLK
TRACEROT
31
TRIGGER
29
MIDADC
28
ADC
27
DACTEST
24
OQ0258
C-ASIC
OFFSET
44
ADDRESS
23
POS
1
CERR2
5
CERR1
4
VDIGN3V3
6
VDIGN3V3
30
GNDDIG
3
VP5V
7
32VAMPN3V3
GNDREF
34
VAMPPSUP
33
VATTN3V3
9
GNDATT
11
VATTP3V3
8
N201
6 7
R282
10E
C282
100n
R286
10E
C286
100n
R288
10E
C288
100n
C290
C258 100n
150p
C252
15n
C253 R255
22n 178K
R261
100K
R260
51K1
R257
100K
R258
287E
R259
100E
C259
100p
TP258
TP256
TP255
TP254
1n
C256
100K
R256
TP253
TP252
TP251
100n
C291
22u
100n
C289
10E
R289
100n
C284
10E
R284
8 9
L281
47u +3V3A
C281
22u
L282
47u -3V3A
L283
47u +5VA
C283
22u
APWM_BUS
POS_B
OFFSET_B
REF_BUS
REFN
DACTESTB
ADC_B
C261
100n
MIDADC_B
TRIG_B
C262
4p7
TRACEROT
SDA T
SCLK
ST8087
970604
[4,I7]
[4,I7]
[3,F13]
[3,C1]
[4,J1]
[4,I1]
[5,J2]
[3,H8]
[4,D1]
[5,B16]
[5,C16]
[5,C16]
HF
LF
ST8087.WMF
Figure 9-2. Circuit Diagram 2, Channel B Circuit