Icom IC-F2721 Service Manual page 46

11-3 MAIN UNIT
8V
5V
5V
R468
JPW
AFOUT
C13
1
R9 R467
IC2
8.2k JPW
AK2346
R7
C10
39k 1 AGNDIN 24
0.001 C11 C37 180p
R10 TEST
2 AGND 23
1 RXIN
8.2k
3 TXIN 22
R6 RXINO
4 TXINO 21
5V
39k RXLPFO
5 LIMLV 20
RXAF
6 EXTLMIN 19
RXAFIN
7 MOD 18
EXPOUT
8 VSS 17
VDD
R421 1M
MTCK 9 TCLK 16
XIN
MTDT 10 TDATA 15
XOUT
MDIO 11 DI/O 14
DIR
X1
MRDF 12 RDF/FC 13
SCLK
CR-765
3.6864 MHz
C14 C16 C18 C20
47p 47p 47p 47p
C38 C63
MSCK
22p 22p
MDIR
SDEC
R11
1k
C15 C17 C19
47p 47p 0.047
C492
R26
150p
330k
IC43
R462
BU4053BCFV
330k
1 Y1
R12 C21
C22
2 Y0
DISC 3.3k 0.1
47p 3 Z1
C61
4 Z
0.0022
R27 5 Z0
R28
6 INH
12k
CP57 33k
7 VEE
8 VSS
R463 C65
C39
DISC2 JPW 0.1
0.0015
CP58 CP59
PM/FM(X)
DET
Rx/PA(Y)
CP35
De-emphasis(Z)
CDEC
R29
CP8
10k
MCOT
R31 10k
MIC
PA
PMFM
MICA
DASW
R398
100k
EXOE
EXST 1 16
STR V+
SSO 2 15
CP34
D OE
SCK 3 14
CLK Q5
4 13
C488
CP30 Q1 Q6
5 12
0.47
CP31 Q2 Q7
R399
6 11
CP32 Q3 Q8
100k
7 10
CP33 Q4 Q'S
8 9
GND QS
R397
10k C489
IC45
C491
0.1
0.1
BU4094BCFV
CP38
5V
R20
100k MMUT
R446 CSI
33k
CIRQ
R447
100k R402
C25
J2 100
0.001
30
1 PTTI PTTI
29
2 PTTO APTT
D54
28
3 MCOT MCOT DAP202U
VCC
27
4 MCIN MIC
AMMT
C24 C43
26 C45
5 AUX 47p 47p
0.001
AFONO
25
BUSY
6 BUSY
BEPO
24
7
MOWN
CP2
OPTIONAL
ARMT
unit 23
8 SIGO
SIG
UT-109
DISC2
UT-110
22
9 OPT1
UT-111 OPT1
AFOUT
21
10 OPT2 OPT2
REM
20
11 OPT3 OPT3
CCS
19 CP39
12
GND
IRQA
18 R33 47k
13 OPV3 PMFM
CSO
R34 10k
17
14 OPV2 NWC
CSIA
16 R35 47k
15 OPV1 DAST
CCK
VCC
C44
0.001
D64
D51 D65 D52 D55
DAP202U
DAP202U MA2S111 DAP202U DAP202U
8V
C26
47p
CP22
J1
1 2 VCC R304
AF ON 5.0 V
100
OFF 0.0 V
3
4 GND
R36
1k
AFON
5
6
MFDA
from
8V AFONO
FRONT 7
8 POSW
unit J1
D36
FMDA
9 DAN222TL
10 MIC
C47 DAFON
C46
GND 47p
C28 47p
11 D53
12
AFO 47p
MA2S111
GND C27
47p
CP26
EXT. SP
J5
R321
JPW
VCC VCC R322 C408
10k 0.1
C409
C1 C2
C440
5 1 0.1
47p 47p
470 4
2
INT. SP C467 C410
J6
47p 1
Yellow 3
1
C465 C464 R365 R348 C439
R324
2
0.001 0.001 10k 10k 470 R323
Black IC38 2.2k
3.9k
C480 C479
SP1 LA4425A
47p 0.001
(IC-F2721/D,
IC-F2710
series only)
8V
5V
5V
C62 C79 C80
C60
0.001 0.1 0.001 R8
10 R3
220k
330k
Q56
C12 R55
2SK3019
0.1 680k
R482
100k
CP37 IC1
C585 R62
NJM12902V
0.1 120k
C8 R4
R42 33k MICA 1 220k
9
8
R43 82k 10
R41
R60 C93
470k C78 IC9
100k 0.1
Q52
0.0018
NJM12902V
2SK3019
C64 C77
R45 R70
2
0.1 0.1
68k R56 47
1
R465
100k 3
3.9k
R54 C94 C91
R44
47k 0.1 1
68k C572
CP7
0.01
DASW DASW
R434
47k
5V 5V
C66 IC1 IC1
IC42
0.1 C95
NJM12902V NJM12902V
BU4053BCFV 0.1
3 12
1 Y1 16
1 14
VDD
16 2 Y0 15
VDD Y 2 13
14 R435
15 3 Z1
Y X
14 4 Z 13 47k
X X1
13 5 Z0 12
X1 X0
11
12 6 INH R24
X0 A
11 7 VEE 10 R477 R476
JPW
A B
10 8 VSS 9 68k 100k
B C
9
C
Q54
Q55
C570
R400 XP4601
0.1
DTC144EUA
2.2k DAFO
R481
3
1.5k
NWC
R401
2
1.5k R478
Q53
1.2k
1
2SK3019
R480 R479
4.7k 10k
R30 R466 CDEC
PA
27k 6.8k
NWC
PMFM
C7
MICA 0.001 C584
C42 C41
0.022
0.001 0.0022
R32 CPU5
18k
DASW DASW
DAFO
3VC
5V
IC44
R395
39k TA75S01F
R110
20k
R394
R111
27k 3 5
20k
4
1
CP54
C141
2 R427 C490 270p
R396
10k 0.1
4.7k C142
470p
R114
C143
5V
100
47p
CSI
R13
100k
CP1 5V
3VC
5V
CPU5 CPU5
CP47 CP48
J4
1615
DRXD
CCK
Explanatory notes
17
14 DTXD
CSID
VOLTAGE LINE
18
13 GND
TX LINE HD7 CSO
19
12 RTSI
IRQD
RX LINE
20
11 DFIL
CCS
HD4
COMMON LINE 21
10 MD2
RXD2
22
9 C_RES
HD5
DAFO
23
8 CTSI
HDS1
TXD2
24
7
HDS2
DRMT
25
6 BUSY
3VA
26
MAIN UNIT
5 RSSID
DAFON HD6
27
4 DMI
VCC
DMMT
28
3 DMO
VCC
29
2 DPTT
5V
5V
30
1 PTTI
GND
CSI
VCC
VCC
R300
10k
Q28
DTC144EUA
5V
5V
5.0 V
R67
100
C98 R118
J3
0.1 4.7k
Q3
1
2 TRST
R117
2SC4215
TMS 1.8k
D34
3
FI3
MA2S111 4
CFWCA450KEFA
TDI
DSP
5
6 TDO R68
emulater
I O
CP23 4.7k
3VAX
C100 R96 C119
7
8 EMU0
0.1 1.5k 0.1
TCK R123
9 R69
10 5.6k
3.3k
EMU1
C386
Q29 0.47
DTC363EK
VCC
8V
5V
5V
C135
R106
4.7
47k
DET
C136
0.1
C110
R53
0.1 IC9
47k
C90
NJM12902V
0.1
R107
5V C109
4.7k
C76 8
0.1
0.001 IC8
M62364FP R90 C138
R94
470 47p
1 VIN1 24 27k
VIN8
2 VOUT1 23
VOUT8
3 VOUT2 22
VOUT7
4 VIN2 21
VIN7
5 VDD 20
C114
GND
6 LD 19
RESET 1
C112
7 CLK 18
VDAREF
8 DI 17 0.1
R91
DO R93
9 VIN3 16
VIN6 15k
27k
10 VOUT3 15
VOUT6
11 VOUT4 14
C137
VOUT5
12 VIN4 13
VIN5 0.0033
R92
100k
DET
DET C111 C113
R108
0.1 0.1 5
68k
7
6
R95
C96 C139
390k
47p
0.1
C115
IC9
47p
NJM12902V
R40
JPW
5V 5V
R475 R474
3.3k 15k
IC6
LC73872M
C67
0.1
1 14
C582 INPUT VDD
2 13
0.1 NC NC
C68
4 3 PD 12
R472 R471
15p EST
22k 22k 4 OSCO 11
5 STD
X3 5 OSCI 10
R46 ACK
6 R473 CR-563 6
9
1M NC SD
22k C581 3.579545 MHz
7 8
0.039 VSS LOAD
C583
C81
C69 R47
0.0068
0.1
18p 10
CPU5
3.2 V
R113 R138 4.7k
68k
R139 22k R165 3.3k R166 1k C212 1
R112 R140 C209
C210
C175 R164
100 5.6k 47p
0.001
0.1 100
1 16
VCOM AOUTR
2 15
C144
AINR AOUTL
C140 IC13 L16 3 14
0.1 AINL PWDA
10 1H 4 13
VSS PWAD
NJM2115V 5 12 BCLKX1
VDD SCLK
6 11
DEM0 MCLK
C145 7 10 BFSX1
R116 20k C214 R167 DEM1 LRCK
C180 C213 C215 8 9 BDX1
82p
0.1 10 10k SDT0 SDT1
R141 C177 R142 0.1 10
R168
100 0.1 470
IC18 AK4550VT
JPW
C176 C179 BDR1
47p 0.0022
1.5VB
L20 1H
3.3 V CP12 C178
C146 R115
0.01
0.01 4.7k R169
4.7k
C181
0.01
C147
R143
R170 4.7k
0.01
10k
BDX1
BFSX1
1.5 V
109 A19 72
CVSS
110 A20 71 BCLKX1
BCLKX1
111 CVSS 70
CVSS HD1
112 DVDD 69
HD1
D6 113 D6 68
CVDD
D7 114 D7 67 3VAX
INT3
115 D8 66 R171
INT2
116 D9 65
4.7k
INT1
117 D10 64
INT0
118 D11 63
NMI
HBIL
119 D12 62
HBIL
120 HD4 61
C236
IACK
121 D13 DSP 60
BDX2 0.01
122 D14 59
BDX0
123 D15 58 HD0
HD0
124 HD5 57
DVSS
3VAX
125 CVDD 56
DVDD
126 CVSS 55 HRDY
IC41
HRDY
127 HDS1 54
BFSX2
TMS320VC5416PGE120
128 DVSS 53
BFSX0
129 HDS2 52 C237
CVDD HINT
130 DVDD 51 0.01
HINT
131 A0 50
CVSS 1.5VB
132 A1 49
BCLKX2
133 A2 Rx Digi/Ana(Y) 48
BCLKX0
134 A3 47
Tx Digi/Ana(X) BDR2
135 HD6 46 HCNTL1
HCNTL1
136 A4 OPT RMUT / CPU RMUT (Z) 45 BDR0
BDR0
137 A5 44
BFSR2
138 A6 43 BFSR0
BFSR0
139 A7 42
BCLKR2
BCLKR0
140 A8 41
BCLKR0
141 A9 40
DVSS HCNTL0
142 CVDD 39
HCNTL0
143 A21 38 BCLKX1
BCLKR1
144 DVSS 37
CVSS
BFSX1
BDR1
C182
0.01
5V
C186 C216
5V 5
0.01 1 0.01
IC17
2
R120 C149
3 4
100 10 TC7SH32FU
C150
0.1
IC16
C148
R144
AD7476ARTZ
7p
22
R119 C184
R121 R145
5
1.5k 10
15k 4 C185 8.2k 1 6 BFSR0
VDD CS
1 0.1
R122 CP13 2 5 BDR0
3 GND SDATA
47
3 BCLKR0
4
R124 2 IC15 VIN SCLK
C151
C152
4.7k C183
0.1 NJM2711F C187 R146 CP15
0.1
0.1
0.0022 8.2k
C30
IC1 68p
NJM12902V
R22 330k
IC9 R2 270k
REF 2
NJM12902V
R1 10k
BAL
5V 3
4 C29
R21
47p
1M
V+
Q7
GND
LVIN
DTC144EUA
11
R157 C206
OUT0
47k 0.001
L1 1.8H
R134 R135 R156
C3
10 47k 47k 47k R158 C31 C32
0.001
180k 0.1 10
CENC0
9
C170
24 OUT1
C172 R159
820p 23 VCCIF
0.1 C207 56k
CENC1 C48 22 VPIF
0.015
0.001 21 CPOIF
R162
20 GND
22k
CENC2 19
R23
18 FINRF
R163 1k 17 GND
1k PLST 16 LE
REM
SSO 15 DATA
SCK 14 CLOCK
R161
UNLK 13 IF_EN
22k
C171 C4 C5 C6 C33
470p 0.1 47p 47p 47p
R136 R137 R160
R109 R464 68k 68k 68k
12 SENC
14
68k 68k
13
C174 C208
68p 270p
4 C51 C52
R37
IC9 0.01 0.1
3.1 V
C568 C173 V+ 1.2k
330p 47p NJM12902V
GND
11 C53
L2
IC1
5V 0.01
0.22H
NJM12902V R38
680k
C55
4p
C34
10p
C54 C56
IC30 R297
56p 7p
470
M62334FP Q1
2SC4116
1 8
AO1 VCC
2 7 R296
AO2 SCL 10k
3 6
R461 AO3 SDA
4 5
C365 C529
100k AO4 GND
0.1 100
5V R449
IC19 NJM2711F
10k
CP19
C254 C272
C537
0.1 1
R199 R201 5p R450
47
47 10k
R221
X6
2.2k
CR-802 R202
12.288 MHz C251 47k
R222
5 C539
0.1 4
1 4 47k
VCON VCC 0.1
1
IC24
C253
3
0.1 3.3 V S-80928CNMC
2 3 IC22
GND OUT R448
2
1k TC7S04F 1
C252 R203 OUT
R223
12.3 MHz 2
10p 47k
10k VDD
1.2 Vp-p C538 1 5 3
[F2721D], VSS
0.1 2
[F2821D]
3VA 3 4 C311
only
0.1
47k [others]
3.3 V
R204
47k
R485
100k
R484
100k
SOO 76 50
P42/AN2
P30/TXD0
SIO 77 49
P43/AN3
P31/RXD0
SCKO 78 48
P44/AN4
P32/SCK0/SDA1/IRQ4 47
DTXD 79
P45/AN5
CCSI P33/TXD1/SCL1 46
DRXD 80
P46/AN6
P34/RXD1/SDA0 45
CP49 RTSI 81
P47/AN7
P35/SCK1/SCL0/IRQ5 44
CTSI 82
P96/DA0
P36 43
83
P77/TXD3 P97/DA1
42
84
P76/RXD3 AVSS
R486 41
85 DSP CPU
CP50 P75/TMO3/SCK3 P17/TIOCB2/TCLKD
100k 40
86
P74/TMO2/MRES P16/TIOCA2/IRQ1
39
87
P73/TMO1/CS7 P15/TIOCB1/TCLKC
38
88
P72/TMO0/CS6 P14/TIOCA1/IRQ0
89 37
P13/TIOCD0/TCLKB/A23
P71/TMRI23/TMCI23/CS5
CP51 RS 90 36
P12/TIOCC0/TCLKA/A22
P70/TMRI01/TMCI01/CS4
HINT 91 35
P11/TIOCB0/A21
R192 PG0/IRQ6
HRDY 92 34
IC20 P10/TIOCA0/A20
47k PG1/CS3/IRQ7
93 33
PA3/A19/SCK2
PG2/CS2 HD64F2239TE16
94 32
PA2/A18/RXD2
PG3/CS1 31
95 [F2721D], [F2821D] only
PA1/A17/TXD2
PG4/CS0 30
HD0 96
PA0/A16
PE0/D0 29
HD1 97
PB7/A15/TIOCB5
PE1/D1 28
HD2 98
PB6/A14/TIOCA5
PE2/D2 27
HD3 99
PE3/D3 PB5/A13/TIOCB4
26
HD4 100
PE4/D4 PB4/A12/TIOCA4
1.5VB 1.5VB
5V
C275 C316 47p
0.1 C317 47p
C318 47p
20 1
VCC G1
C238
19 2
G2 A1
0.1
CP18 SIO R229 3.3k 18 3
Y1 A2
CCSI R230 3.3k 17 4
20 1 Y2 A3
R231 3.3k
VCC O-CTRL SCKO 16 5
19 8Q 2 Y3 A4
1Q
PTTIN R232 3.3k 15 6
18 8D 3 Y4 A5
1D
17 7D 4 BUSYD R233 3.3k 14 7 SOO
Y5 A6 C319
2D 13 CIRQD
16 7Q 5 8
2Q Y6 A7 47p
15 12 PTTOT
6 9
6Q 3Q Y7 A8
14 7 11 10
6D 3D Y8 GND
13 5D 8 C277
4D
12 C320
9 47p
5Q 4Q IC25
11 10 47p
CLK GND
TC7MET541AFK
R205 R206
R207 C276
100 100
CP16 100 47p
IC21
TC7MET374AFK
VCC
11 - 3
8V
8V
5V
EP5
ACZ1005Y-102-T
X2
CR-794
15.3 MHz
15.3 MHz
C70
950 mVp-p
1 4
1 0.1
VCON VCC
2 3
GND OUT
C71
10p
LVIN
R429
1k
R48
IC4 470
LMX2352TM
C73
1 C49
CUTO 2
100p
0.001 CPORF
VCCRF 3
VPRF 4
C126
C85 L4
CPORF 5
5p
10p 15 nH
GND 6
FINIF FINRF 7 FINRF
FINRF 8 C50
R49
GND 9 47p
47 C104 C123
OSCX 10 OUT1
7p 7p
OSCIN 11
FO/LD 12
C75
RF_EN
0.001
A
5V
5V
REF
FI1
C88
CFWLB450KE2A
0.1
O I MIX
FI2
D2 D4
R89
CFWLB450KGFA
MA2S077 MA2S077
4.7
I O
C89
C108
D3
0.1 IF
0.1 R88
MA2S077 R59
18k
18k
L3
D5
0.82H
R50 MA2S077
4.7k
R426 Q2 DTA114EU R87
R425
4.7 4.7k
3.3k
C556
C527 R84
C526 0.1
0.1 4.7k
0.1
B
NWC
CPU5
CPU5
5V
5V
IC-F2721D and
IC-F2821D only
C273
0.001
R441 1k
MD2
R408 1k
C_RES
5
CD
C310 C313
4
4.7 0.1
NC
C312
L45
0.01
1H
C314
0.1
RSSID
3VA
C337
0.1
R290
10k
8
1
VCC A0 2
7
WP A1 3
6
SCL A2 4
5
SDA VSS
IC28
C315
3.3 V
0.01 HN58X2416TI
R291 47k
R292 47k 3VA
IC31 XC6204B332MR
5V 5V
3.3 V 3VA 5 1
VOUT VIN 2
VSS 3
4
C338 C341
NC CE
0.1 10 C367 C370
R269 100 CSO
0.1 4.7
R270 100 CCS
R271 100 CCK
1.5 V
R272 100 PTTI IC32 R1114N151B
R273 100 BUSY
1.5VB
5 1
VOUT VDD 2
GND 3
4
C339 C342 NC CE
C368 C371
0.1 10
0.1 4.7
3.2 V
IC33 XC6204B332MR R298
4.7
3VC 5
1
VOUT VIN 2
VSS 3
C343 C340 4
NC CE
0.1 10 C372 C369
0.1 4.7
AFO
VCC