Icom IC-7851 Servise Manual page 162

RF-A UNIT (RF-A-3)
+15V
+8V
+11V
-12V
Band HF3V VHF3V
HF 0
HF3V
HF3V
VHF3V
VHF3V
50 MHz 2.72
IFW
IFW
IFM
IFM
IFN
IFN
IFSN
IFSN
L3004
L3003 0.39U C3001
HF_IF
68N 0.01
L3005
0.12U
3
C3002
50M_IF
0.01
MP3001
D3051 Q3051
1SV307 2SC4536
C3056
TO SCOPE J11
[SCP_IFA]
J3051
22P
R3054
L3054
10U
12
R3055
1K
IC3702
J3701 8
VT/COMP
GND 7
TO MAIN J196 2 R3706 V+
DIFA 6
[36KIFA] 1 OUT
5
100 COMP
C3705
NJM5534MD
22P
D3751 R3757
IC3752
6
7 220
L1SS400
5
NJM072BM
IC3752
2
R3761
1
AGCDET
3
1K R3758
D3752
NJM072BM
220
L1SS400
AGC
R3707
C3710
100
100 CE-LH
C3708 0.1 8
IC3701 V+
NJM072BM
V-
C3711 0.1 4
C3709
R3708
100 CE-LH
100
TO LOCAL J4302
[R2LOA]
J3801
+8V
2.98
0
MP3006
3615
82P IC3101
SKY13322
C3015
10 1
J4 J2
9 2
L3006
V4 V2
C3005 C3017
6 8 3
GND IN RFC N/C
7 4
0.01 0.01
V3 V1
6 5
J3 J1
LR-524A
82P
C3016
R3059
C3051
12 0.01
L3051
LR-317
MP3051
2427
C3513
R3510 120P
150
R3702
IC3501
R3515
820 8
VT/COMP
7
10K
R3517 V+
6
IC3701 10K OUT
1 2 5
R3704
VT COMP
2 1
IN- C3515
3 3 NJM5534MD
IN+ 3.3K
4 NJM072BM
V- R3709 180P
C3516
3.3K
3.5P
C3610
R3610
R3755 R3754
22K
10K R3616 470
2
IC3601
1 10K 8
R3751
VT/COMP
R3618
3 7
IC3701 10K V+
IC3751 6 6
6.8K OUT
7 5
NJM4580M
C3613 COMP
5
NJM072BM NJM5534MD
680P
R3756
R3752
C3614
22K
22K
6
390P
7
R3753
5
IC3751
10K
NJM4580M
C3752 C3754
0.1
0.1
8 8
IC3751 V+ V+
IC3752
NJM072BM
NJM4580M GND V-
4 4
C3753 C3755
0.1 0.1
R3802
0
9-19
R3151
R3152 10K
R3153 10K
R3154 10K
LS-484B LS-484B 10K
L3111 L3112
MCFW
(BW=15k)
FI3111
FL-488
0.01 0.01
1 4
IN GND
3 2
C3111 C3115
GND OUT
L3122
L3121 LS-484B LS-484B
J1
5
MCFM
V1
4
(BW=6k)
N/C
3
FI3121
V2
FL-358A
C3121 2
C3128 J2
1 4 1
IN GND
3 2 IC3151
0.01
GND OUT 0.01
SKY13322
L3131 MCFN L3132
LS-484B
LS-484B (BW=3k)
FI3131
FL-396
C3131 0.01
1 4
IN GND
3 2
C3138
0.01 GND OUT
FI3141
C3141
0.01 C3142
1 4
IN GND 0.01
3 2
GND OUT
J3144
J3142
PDB65-GG
PDB65-GG
R3511
5.6K
1
VT R3513 Q3501
C3509
KTC3770U
2
IN- C3503 R3501 L3502
0.01
3
IN+ 1K
4 4.7U
C3517 1 F93 33
V-
0.01
R3504 C3506
10 10P
120P
R3611
5.6K
C3607
1 Q3601
0.01
VT R3613
KTC3770U
2
R3601
IN- C3603 L3602
3
IN+ 1K
4 4.7U
1 F93 33
V- C3617
0.01 R3604 C3605
10P
10
1.33
V -
P P
IC3802
IC3801 1 8
R3805
1 6 2 7
1A 1Y
2 5 3 6
L3801 C3802 GND VCC 100
3 4 4 5
2A 2Y
0.39U 0.001
SN74LVC2GU04DCKR SN74LVC2G00DCTR
R3806
L3802
R3804
0.18U
100K
100
J3
6
V3
7
RFC
0.01 0.01 L3164
8
R3167 LQW18AN56NG00
V4 C3168 C3169
9
J4
10
0
L3162
LR-595
R3162
C3163
22P
100
Q3161
2SC4536
R3166
10
12
C3166
Q3162 Q3163
L2SA1576AR 10U
DMG564010
R3164 R3165 L3163
3
4.7K 1K
2
1
C3403 10 F93
C3401
0.1
MP3301
IC3401
1 8
COM V+
L3402
2 7 3615
EN NC
3 6
GND NO
4 5
GND IN
LR-528 R3321
L3401
TS5A2053DCTR
#617DS
0
C3412 10 F93
C3411
0.1
L3311 R3315
IC3402
10U 12
1 8
COM V+ L3403
2 7
EN NC
L2SA1576AR
3 6
GND NO 10
4 5
GND IN C3319 R3316
LR-528
TS5A2053DCTR
L3803
2.7U
6
R3808 R3351
7
5
47 IC3351
NJM2904V
1.46
V -
P P
*: Refer to the PARTS LIST for the value and name of component.
R3851
47
IC3851
1 5
CTRL VIN
2
GND EP3851
3 4
NB VOUT
MMZ1608Y102BT
NJM2871BF05
L3302
LR-596
0.1U
L3303
Q3302
2SC4536
0.01
C3303
C3304
0.01
R3305
12
Q3301
L2SA1576AR
10
R3303 R3304 C3306
1K
4.7K
4
5
6
C3309
0.01
R3318
2.7K
D3301
BAP70Q C3307
C3315
L3321 0.01 0.01
39N
Q3303
2SC4536
Q3304
R3314
1K
4.7K
+5V
R3355
100K
2 8
R3357
1 V+
100K
3 GND
100
Q3351
IC3351 4
NJM2904V L2SC4081
IC3351
NJM2904V