Icom IC-7851 Servise Manual page 145

TO SW-A J3
TO LED UNIT DISPLAY UNIT
TO VR-D UNIT
TO VR-C UNIT
IC207
1 20
VSS VDD
2 19 LOE
NC OE
3 18 SO LDAT
DATA SO
RTCCK 4 17 RTCCK
J11 CLOCK Q11
5 16
LST TKYD4 LST
LCK Q10
LDPS
6 15
10 MTXD TKYD3 PWRD
MTXD Q0 Q9
9 MRXD 7 14 TKYD2 TN1D
MRXD Q1 Q8
8 MLCD 8 13 TKYD1 TN2D
MLCD Q2 Q7
7 SPLD 9 12 SLCD VOXD
Q3 Q6
SPLD
6 STXD 10 11 SRXD MAGD
Q4 Q5
STXD
5
SRXD
4 BU2099FV
SLCD
3
2
1
BRIV
CNTV
Q1 SDBD
J1
LDTC114EE
LDPS
40 Q2 USBD
SBPS
39
LDTC114EE
BRIV
38
CNTV
Q3 MOND
37
LDTC114EE
36
35
Q4 MNRD2
34
LDTC114EE
33
32
Q5 SNRD2
31
LDTC114EE
30
STBD
29
PWRD
28
VOXD
27
TN1D
26
TN2D
25
TMD
24
MAGD
23
MNRD1
22
MNBD
21
SAGD
20
SNRD1
19
SNBD
18
R1 1K TRAK
17
R2 1K PWRK
16
R3 1K KI7
15
R4 1K KI8
14
R5 1K KI9
13
R6 1K KI10
12
R7 1K KI11
11
R8 1K MIGL
10
R9 1K PWRL
9
R10 1K MAGL
8
R11 1K MSQL
7
R12 1K KYSL
6
R13 1K DELL
5
R14 1K SAGL
4
R15 1K SSQL
3
2
1
J2
H3R3V
1
2
R24 1K SNRL
3
R23 1K SNBL
4
R28 1K SAFL
5
R27 1K SRFL
6
7
8
9
10
J3
H3R3V D21 D23 D24
18
17
R22 1K MNRL
16
R21 1K MNBL
15
R26 1K MAFL
14
R25 1K MRFL LRB706F LRB706F LRB706F
13
12
R31 1K
11
R30 1K
10
R29 1K
9
MPZ1608S221A
8 EP21
7
6
5
MSND
4
Q21
3
LDTC114EE
2
1
PSENI
Q23
L2SC4081
R34
33K
8.0
Q22
DSC7004S0
R36
PTRAS
SQL open 0V
150 Q24
LDTA114EE
SQL close 8.0V
TO SW-B J1
TO VR-E J1
EP251
H3R3V
MPZ1608S221A
IC206
1 20
Q251
VSS VDD
2 19 LOE LDTC144EE
NC OE
Q252
3 18 RESET
DATA SO
4 17 STBD
CLOCK Q11
LDTA143TE
5 16
TMD
LCK Q10
6 15 SNBD
Q0 Q9
7 14 SNRD1
Q1 Q8
8 13 SAGD
Q2 Q7
9 12 MNBD
Q3 Q6
10 11 MNRD1
Q4 Q5
BU2099FV
LDPS
SBPS
H3R3V
C215 0.1
IC201
MAGL 1 16
X4 VDD
SAGL 2 15 KYSL
X6 X2
3 14 PWRL
X X1
SSQL 4 13 MIGL
X7 X0
5 12
MSQL DELL
X5 X3
6 11
ASL0
INH A
7 10 ASL1
VEE B
8 9 ASL2
VSS C
CD4051BPWR
AS0
C219 0.1
IC202
1 16
MAFL
X4 VDD
2 15
SAFL SNRL
X6 X2
3 14 MNBL
X X1
SRFL 4 13 MNRL
X7 X0
MRFL 5 12 SNBL
X5 X3
6 11 ASL0
INH A
7 10 ASL1
VEE B
8 9
ASL2
VSS C
CD4051BPWR
AS1
C216 0.1
IC203
AVXL_ 1 16
X4 VDD
BRIL_ 2 15 DRVL_
X6 X2
3 14
CMPL_
X X1
4 13
MONL_
X7 X0
CNTL_
5 12 VOXL_
X5 X3
6 11 ASL0
INH A
7 10 ASL1
VEE B
8 9 ASL2
VSS C
CD4051BPWR AS2
C217 0.1
IC204
KI0 1 16
X4 VDD
KI2 2 15 SNCL
X6 X2
3 14 SDGL
X X1
KI3 4 13 MNCL
X7 X0
5 12
KI1 PITL
X5 X3
6 11
ASL0
INH A
7 10 ASL1
VEE B
8 9 ASL2
VSS C
CD4051BPWR AS3
DOTK
DSHK
PHNI
+8V
KI7
C218 0.1
H3R3V
SQSS IC205
KI8 1 16
X4 VDD
KI10 2 15 KI6
X6 X2
3 14 KI5
X X1
KI11 4 13 KI4
X7 X0
5 12
KI9
X5 X3
6 11
ASL0
INH A
7 10 ASL1
VEE B
8 9 ASL2
VSS C
CD4051BPWR AS4
R402
LDPS
Q401 39
2SB1201
R404
39
Q402 R422
L2SC4081
12k
R423
6
R421
7
15k
5
10k
IC421
NJM2904CRB1
IC251
1 22 SBPS
GND NC
RESET 2 21
CE1 NC
RTCCE 3 20 IC261
CE0 NC
RTCDT 4 19
DI NC VrefU Vcc
5 18 10 11
DO NC Ao10 Ao11
6 17 9 12
RTCCK
CLK NC Ao9 Ao12
7 16
RTCIRQ 8 13
/TIRQ NC Ao8 Do
8 15 7 14
/AIRQ NC Ao7 LD
9 14 6 15
FOE NC Ao6 CLK
10 5 16
FOUT Ao5 DI
11 4 17 LEDV
VDD Ao4 Ao1
3 18
Ao3 Ao2
RX-4581 2 19
VrefL GND
1 20
R2A20169SA
BT3R0V
R316 47K
C309 100P
R301 2.2K
C310 100P 100P
R302 47K
MUDL
CNTV R304 0
1
BRIV 2
3
LDAT
4
LST
RTCCK 5
6
CNVSS 7
RTCCE 8
MOND 9
10
RESET
11
C303 9.8304MHZ
12
27P
C305 13
14
27P
15
0.1
RTCIRQ C304 16
17
RSB
18
RSA
SSB 19
SSA 20
MSB 21
MSA 22
USBD 23
24
SDBD
25
BKLS
R317 47K
R309 47K
R310 47K
R311 47K
R313 10K
R314 47K
Q502 RSQ035P03TR
H15V
Q403 8
2SB1132L R501
IC421
V+
NJM2904CRB1
GND
R425
4
Q404
L2SC4081
12k R426
2
R424
1
15k
3
IC421
10k
NJM2904CRB1
IC501
H5V 1 5
R504
2
27 3 4
TC7S14FU
5
3
R411
4
CFLV 1
IC411 560
NJM2730F
2
STBV 3.3
H5V
LDPS
H15V
H3R3V
C311
100P
C312
100P
C313
LG_PWR
LG_RES
75 SATK
74 MLCK
73
PWRK
72
MTSK
71 MATK
70 VMK
69 MPWK
68 DWK
67 UPK
66
MWK
65
MPRK
64 SUBK
IC301 R5F36406CDFB(SX-3615C)
63 CHGK
62
61 MINK
60
59
EQRK
58
XFCK
57 RECK
56 PLYK
55 EXTK
54 MSCK
53 DATK
52
AMK
51
RTYK
3.0
IC271
R3112N281A
1 5
OUT CD
2
VDD
5.5 3 4
VSS NC
OPEN DRAIN
TO MAIN-SENSOR
*: Refer to the PARTS LIST for the value and name of component.
9-2
TO TENKEY J
R508 J501
0 TO TENKEY J
Q501
LDTC144EE VDIM
4
VEN
15.1 3
100K 2
1
LRB751S
R506
27 D502
Q504
LDTC144EE
Q503
R507
LDTC144EE
12K Q505
LDTC144EE
Q506
LDTC144EE
EP41 J4
MPZ1608S221A
H3R3V
30
KI6 1K KI6_
R41
29
KI5 R42 1K KI5_
28
KI4 R43 1K KI4_
27
GND
26
GND
25
SSA R48 47K SSA_
24
SSB R49 47K SSB_
23
RSA R50 RSA_
47K
22
R51
RSB 47K RSB_
21
20
UPK R52 1K UPK_
19
DWK R53 1K DWK_
18
VMK R54 1K VMK_
17
MPWK R55 1K MPWK_
16
MWK R56 MWK_
1K
15
MPRK R57 1K MPRK_
14
XFCK R58 1K XFCK_
13
MINK R59 1K MINK_
12
EQRK R60 1K EQRK_
11
SUBK R61 1K SUBK_
10
CHGK R62 1K CHGK_
9
8
SO R63 1K LDAT_
7
RTCCK R64 1K LCK_
6
LOE R65 1K LOE_
5
LST R66 1K LST1_
4
3
2
LDPS
1
MPZ1608S221A
H5V
H3R3V
EP71
J5
H5V
30
29
TKYD1
28
TKYD2
27
TKYD3
26
TKYD4
25
MDGL R68 1K MDGL_
24
MNCL R69 1K MNCL_
23
MP2B R70 1K MP2B_
22
1K
MP2A R71 MP2A_
21
MP1B R72 1K MP1B_
20
MP1A R73 1K MP1A_
19
SP1A R74 1K SP1A_
18
SP1B R75 1K SP1B_
17
SP2A R76 1K SP2A_
16
SP2B R77 1K SP2B_
15
SNCL R86 1K SNCL_
14
SDGL R87 1K SAPL_
13
PITL R88 1K PITL_
12
SATK R89 1K SATK_
11
SLCK R90 1K SLCK_
10
MLCK R91 1K MLCK_
9
SSPK R92 1K SSPK_
8
MSPK R99 1K MSPK_
7
STSK R93 1K STSK_
6
MTSK R94 1K MTSK_
5
KI0 R95 1K KI0_
4
KI1 R96 1K KI1_
3
KI2 R97 1K KI2_
2
KI3 R98 1K KI3_
1
Standby 14.9V
Power ON 0V
Standby 0V
Power ON 3.3V
J7
Q101
1
LDTC114EE
2
R103
LTXD 1K
3
LRXD 1K
4
Q102 R104
5
LG_RES
6
LG_PWR
7
LDTC114EE
8
PTRAS
9
PSENI
10
BT3R0V
11
H3R3V EP101
12
MPZ1608S221A
13
H5V EP102 H5V
14
MPZ1608S221A
15
+8V EP103 +8V
16
MPZ1608S221A
17
H15V EP104
18
MPZ2012S221A
19
20