Icom IC-7851 Servise Manual page 168

SCOPE UNIT (SCOPE-1)
J11
C42
0.001
[SCP_IFA]
Q41
TO RF-A J1051
LDTC114EE
L41 R42
SSA
10U
220
J12
SOPE MAIN selected in RX 3.0 V
C46
[SCP_IFB]
TO RF-B J1051
0.001
Q43
LDTC114EE
L42 R46
SSB
10U 220
J13
[SCPT]
SOPE SUB selected in RX 3.0 V
TO MAIN J1131
7.8
0.0
EP4 MPZ1608S601A
3.2 7.7
J1
+3R3V +3R3V EP1
1 2
MPZ2012S221A
3 4 L22
+8V +8V EP3 +8V
5 6
T8V MPZ2012S601A 100U
7 8
H15V H15V EP5
9 10
MPZ2012S601A
11 12
OCS OCS
R1 100
13 14
ODAT OCK R3 100 OCK
15 16
OSS1 R4 100 OSS1
17 18
OSS2
19
20
SHSK0 SHSK1 R7 100 SHSK1
21 22
FRWT SDSPX R9 100 SDSPX
23 24
SDSPCR SDSPCX R11 100 SDSPCX
25 26
SDSPR SDSPCK R13 100 SDSPCK
27 28
DRESD
29 30
14.9
TO LOGIC J1101
R14 100 DRESD
R12 100 SDSPR
R10 100 SDSPCR
R8 100 FRWT
R6 100 SHSK0
R5 100 OSS2
R2 100 ODAT
J21
H15V EP21 MPZ2012S601A
1
2
3
+8V EP22 MPZ2012S601A
4
5
GND
TO OSC J2016 6
OCS R21 100 OCS
7
ODAT R22 100 ODAT
8
OCK R23 100 OCK
9
10
OSS2 R24 100 OSS2
11
OSS1 R25 100 OSS1
12
5.0
IC31
NJM7805DL1A
R31
I O
2.7 G
SCOPE-2
SDSPCK
SDSPCK
SDSPCR
SDSPCR
SDSPCX
SDSPCX
SDSPR
SDSPR
SDSPX
SDSPX
DRESD
DRESD
FRWT
FRWT
SHSK0
SHSK0
SHSK1
SHSK1
SCK
SCK
SDAT
SDAT
SSTB1
SSTB1
SSTB2
SSTB2
/CAL
/CAL
SFILW
SFILW
SSA
SSA
SSB
SSB
ATT10
ATT10
ATT20
ATT20
+3R3VA
+5V
S3IF+
C51 C52
0.001
0.001
R44
C55
10K GND IN
3 6
0.01
Q42
C56 C59
2SK3018
0.001 0.001
R51
10K
C61
Q51
IN
R48 LDTC114EE
6
0.01
10K
Q44
2SK3018
GND IN
3 6
Q52
C57
LDTC114EE
0.01
T8V
+5V
+8V
+3R3V
/CAL
R102 R104
R111 R113 C119
10MHz
[SREF] Q111
TO OSC J1201
L2SC4081
18 18 33 18 0.1
J101
+5V
+3R3V
MP471
2577 RX-VCO CASE
L483
LQW18ANR15G00D
IC481
C471 C473 C475 C477 R482 C481
1 4
IN GND C486
2 3
0.01
120P 51P 47P 68P 39 GND OUT
C483 27P
BGA616
0.01
+3R3V
/CAL
L451
+8V
IC36
BA033FP
3.3
R36
I O
12 G
R37
12
C414 L412
0.82U
R411
R413 C419 68P
10MHz Q411
C416
L2SC4081
33 18 0.1
75P
MP401
3615
9-25
Q61
LDTC114EE
0.01
C64 R63 R64 C67 C74 R73
0.01 0.01
27 27 39
C71
GND GND IN IN GND
3 3 6 6 3
0.01
C75
C65
0.01
0.01
Q152
RZR040P01
L151
MMZ1608Y102BT
47U
MMZ1608Y102BT EP132
3.2
Q151
LDTC114EE
NC
20
NC
19
NC
18
CEN
17
DVDD
C114 L112 R120 C118
16 IC101
XREFP
HMC832LP6GE
15
0.82U
68P 18 0.01 NC
14
C116 NC
13
NC
12
75P NC
11
R161 R162
1.8K 1.8K
3615
MP101
1.5
2177 D/A CASE
R234
MP301
15
D301 IC231
R492 L301 L302 R235 C235
3 1
OUT
3
0.01
5.6 15 GND
4
4 2 BGA616
LR-317 LR-317
HSMS-2829
Q452 RZR040P01 MMZ1608Y102BT
EP432
47U
MMZ1608Y102BT
MMZ1608Y102BT
3.2
R434 100
C441 0.1
Q451
LDTC114EE
NC SDI
20 31
NC SCK
19 32
NC LD/SD0
18 33
CEN NC
17 34
IC401
DVDD
R420 C418 VCCHF
16 35
HMC832LP6GE
XREFP
VCCPS
15 36
NC
18 0.01 NC
14
37
NC NC
13 38 C442
NC VCCPD
12 39
NC BIAS
11 40
0.001
41
R461 R462
1.8K 1.8K
1.9
SCOPE ATT ATT10
Q71
LDTC114EE
10K
0 dB 0.0 V
R76
10 dB 3.0 V
2577 RX-VCO CASE
MP81
20 dB 0.0 V
0.01 30 dB 3.0 V
R74 C76
39
C81 C82 C84 C86 L84 L85
82N 0.12U
0.01 39P 39P 56P
GND IN
C88 C90
3 6
39P 22P
C149 C153
33P
L141 MMZ1608Y102BT 27P
MMZ1608Y102BT
IC132
82N
5 1
C154
2
R135 100
4 3 27P
C141 0.1 IC171
C171
R172 1
IN
SN74AHC1G08DCK3
39 2
0.01 GND
BGA616
R139 100
SDI
31 R137 100
SCK
32
LD/SD0
33
NC
34
VCCHF
35
VCCPS
L172
36
NC C145
37
NC 68N
38 C142
22P
VCCPD
39 IC133
BIAS C146
40 5 1
0.001
2
0.1
41 4 3
C147
SN74AHC1G08DCK3
0.1
C143
10
R211
10K
FI211
FL-455
L211
C213 1.5U
4
GND C234 R231 C232 GND
2 2
IN IN GND 0.01 OUT
1 0.01 6 3
0.01
15 L212
1.2U
FI212
FL-442
C214
L213
0.01
1.8U
4
GND
2
OUT
CASE-BM7H CASE-BM7H
L214
EP211 EP213
1U
MMZ1608Y102BT
IC432
SN74AHC1G08DCK3
5 1
2
4 3
5.0
L311
10U
R438 100
R436 100
SN74AHC1G08DCK3
IC433
C445
5 1
2
22P
4 3
C446
0.1
C447
0.1
C443 R313 C314
10 15 1
*: Refer to the PARTS LIST for the value and name of component.
ATT20
0.0 V
0.0 V
3.0 V
3.0 V
C97
L92
L86 C94 LR-517A 0.01
0.15U
0.01
C92
R92 C95
6P
100 5P C98
Q91
0.01
MT3S20P
R94
3.3K
4
GND C173
3
OUT
2177 D/A CASE 2177 D/A CASE
0.01 C191
MP171 MP201
82P
C192
82P
D201
R177 L201 L202
3
5.6
2 4
LR-317 LR-317
HSMS-2829
Q211
LDTC114EE
L215
1.5U
C225
1
IN
3
GND 0.01
L216
1.2U
C231 R202
GND IN
3 6
0.01 18
L217
1.8U
C226
1
IN
3 0.01
GND
L218
EP215 EP217
1U CASE-BM7H CASE-BM7H
R315 R317 C315 R318
5.6K 1K 1 47
MODE SFILW
CENTER mode
3.2 V
SPAN：±2.5 k∼5.0 k
CENTER mode
0.0 V
SPAN：±10 k∼500 k
FIX mode 0.0 V
R314 R316
10K 10K