Icom IC-F2721 Service Manual page 47

8V
8V
C555 C549
7.0 V EP9
R77
10
47p ACZ1005Y-102-T
100 R127
2.2k
Q9
C153 R452 R451
Q4 C155
2SC4116
47p 6.8k 6.8k
0.01
C84
2SK880
C156
0.001
10
C546
CP9
L47 C543
8p [H] R453
R79
1.2H 15p
15p [L] 4.7
10k
C544 C194
C541
12p [H], 39p [L] 0.5p
R432 C83
R83 12p [H]
1.2k 0.001 C554 R456 L48
8p [L]
4.7k
D70 1.5p [H] 10 7.5nH
LVIN
HVC350 4p [L]
C542
R433
D71 6p [H]
2.2k R459 R428 L46
C522 C523 10p [L]
1.5k 1k R80 HVC383 1.2H R150 D12
3.3 0.47
220k MA368
330
L52
Q46 C124 C125
1.2H [L]
C525
1 47p
0.82H [H]
0.0033 2SC4116
R430 R126
R454
R125
5.6k 12k [H],
820 [H]
100k
18k [L]
Q47 680 [L]
R457
CPORF
100 2SC4116
C569 C122 C121 R97 C120
Q50
R431 47p 470p 1 22k 0.001
2SK880 R458 22k
C127
FINRF 10k
1
FINRF
OUT1
OUT1
R128
100k
R149
R98
100k
82k
C545 C161
C128
4.9 V 0.1
0.001
0.001
A
5V
X4
R85 47 CDBC450KCAY24
5V
C129 C162
R130
REF 0.001 IC12 10 R131 R132
R129
C87 R86 1.8k 680 100k
TA31136FN
100k
3p 1.5k IF
1 OSCIN 16
MIX MIXIN
2 OSCOUT 15
C107 GND C163
3 MIXOUT
14
0.1 N-REC 100p
4 VCC 13
C164
N-DET Q6
5 IFIN 12
RSSI 100p
6 DEC 11 2SC4215
IFOUT C165
C487
7 FILOUT 10
QUAD 0.001
0.1 8 FILIN 9
AFOUT
4.9 V R133
IF
C130 C131 R100 C132
150
R99
330p 100k 390p
0.1
4.7k C167
W 1.1 V R483 330k
0.001
N 1.0 V
R101 R470 R105
R103 C133
R383
2.2k 47k C166
120k 0.001 470
100k
47p
C557
C134 0.001
Q45 R104 R384
47k 0.001 180k
DTC144EU
B
C168 0.001
NWC
NWC
8V
CPU5
CPU5
5V
5V
C72
CPU5
0.001
R57
R198
47k
CP17
100
IC46
C82 R58
S-80942CNMC
0.1
100k
5 1
CD OUT 2 C248
C515
VDD 3 0.1
0.027 4
NC VSS
Q15 C249
0.1
DTA144EUA
D14 DAN222TL
C250
0.1
PWR
PWON
R186
100k
R185
100k
TEMP
51
P41/AN1
52
P40/AN0
53
VREF
54
AVCC
EPTT 55
PH7/TONED/TMCI4
MD1 56
MD1
57
OSC2
58
OSC1
ARES 59
RES MAIN CPU
60
NMI
61
STBY
62
VCC
63 IC23
R392 XTAL
64
HD64F2268TF
47k VSS
65
EXTAL
66
FWE
67
MD2
MFDA 68
P77/TXD2
FMDA 69
P76/RXD2
CSFT 70
P75/TMO3/SCK2
DUSE 71
P74/TMO2
HORN 72
P73/TMO1
HLC 73
P72/TMO0
XCTS 74
P71/TMRI23/TMCI23
XRTS 75
P70/TMRI01/TMCI01
R187
12k
CSFT
C232
0.1 R188
D15
10
MA77
X5
CR-764
C233
R189 19.6608 MHz
15p
12k R286
R190
12k 100k
R442
R191
C234 C235
100k
1M
6p 12p
R287
1k
CPU5
Explanatory notes
VOLTAGE LINE
MAIN UNIT
TX LINE
RX LINE
COMMON LINE
AFO
VCC
VCC
8V
VCOV
R147 R174
C548 R194
6.8k 6.8k
TX 0.8 V
47p 10k
RX 0.8 V
C217
L6 C220 C222
C547 C188 18p [H]
R173
1.2H 0.01 470p
0.001 8P 12p [L]
JPW
Q11
L12 C218
C190 L53
2SC4226
10.5nH 7p [H]
5p [L] 7.5nH
[L] only 12p [L]
D7 C191 D11 7p [H] [H] only
C540 HVC383 5p [L] HVC350 C219
L50
0.5p 7p [H] 10p [L]
0.82H
15p [H] R176
R175
Q16 L13 R148 680 [L]
1.2H 5.6k 6.8k
330 [H]
2SC4226
C192
C224
Q12 C221
L9
6p [H] 9p [L]
R178 0.001
2SC4226
1.2H 7p [L] 12p [H]
JPW
Q17
Q49
C196
C225
XP1214
XP1214 5p R179
C197 D13 4p
D9 330
5p [H] HVC350 4
4 3
HVC383
4p [L]
L51
L54 L14 C226
2 L15
7.5nH 10.5nH 0.82H
1.2H 8p
5 [H] only [L] only 5
1 TX 3.4 V
C536 C535
RX 0.0 V
R455
0.001 0.001
1k
FINRF
OUT1
C193 R177
0.1 R8V 10k
Q51 C247
R182
0.001
2SK3019 10
R180
L24 L26
100 L17
18nH [H] 18nH [H]
R151 4.7H R196
27nH [L] 27nH [L]
1.5k 22
L18
C227 C228 C229
R195 C246 C264 C516
0.27H R197
33p 0.01 0.001
270 10p [H] 18p [H]
C198 C199 270 10p [H]
C200
6p [L]p 12p [L]
0.01 0.001 C201 Q13 6p [L]
0.01
0.001
PMBFJ310 C230 C245 L23
0.01 2p 617DB-1327=P3
R181
FI4
6.8k
FL-380
46.350 MHz
5
4 1
C231
L22 C265
GND IN R375
0.001
617DB-1327=P3 D16 2p
2 3 100
OUT GND R154 HSB88WS
R184
330 C268
Q14
6 22
1.5p [H]
PMBFJ310 0.5p [L]
R376 L19
C205
C203
R155 6.8k 4.7H
0.001
15p
1k
C202
2p R152
C204 Q10
270
2p
2SC4215
NWC
8V
CPU5
5V
R261 HLC
100k
R387
100k
R325
2.2k
R460
100k C412
0.1
SIGNAL
C414
R285 0.01
1k
25 CCS
PK0/SEG9
24 CCK
PK1/SEG10
23 CSI
PK2/SEG11
22 CSO
PK3/SEG12
21 DDAC
PK4/SEG13
20 DDSD
PK5/SEG14
19 NWC
PK6/SEG15
18 AFON H_OUT2
PK7/SEG16
17 TMUT
PL0/SEG17
16 TXC
PL1/SEG18
15 DASW
H_OUT1
PL2/SEG19
14
VSS
13 PLST
PL3/SEG20
12
CVCC
11 SCK
PL4/SEG21
10
SSO
PL5/SEG22
9 EXST
PL6/SEG23
8 DTPD
PL7/SEG24
7 PGI1
PM0/SEG25
6 PGI2
PM1/SEG26 VCC
5 PGI3
PM2/SEG27
4 PGO1
PM3/SEG28
3 PGO2
PM4/SEG29
2 DAST
PM5/SEG30
1 DSDA
PM6/SEG31
MD2
R264
C308
MD1
100k
0.1
C_RES
ARES
RXD2
TXD2
R393
100k
CPU5
H_OUT1
R262
C306
10k HANG R417 1k
0.1
MMUT R409 1k
ESCL
VCC R407 4.7
R263 IC26
ESDA
RCK R414 1k
R288 100k
HN58X24128FPI
1k
8 VCC 1
A0 R410
7 WP 2
A1 4.7
3VA
6 SCL
3
A2
CPU5
5 4
SDA VSS
C508
47p
MD1
CTS R411 1k
BUSY R406 1k
RTS R413 1k
RDAT R405 1k
RXD R415 1k
R416 1k
TXD
H_OUT2
C496 C497 C505
47p 47p 47p
VCC
CPU5
11 - 4
8V
T8V
VC0V
C257
C242 C281 C284 C285
0.001
470p 0.01 470p 47p
EP6
R193 R237
ACZ1005Y-102-T R209
470 100
100 R242 R443
6.4 V 100 47
C576 C550
0.1 47p
6.9 V
R238
Q20
C241 C255
10k R248
0.1 47p L30
2SC5107 C322 R240 27k
L25
47p 100k 27nH
C279
33nH C259
47
5p C282 R239 C571
C239 R208
C321
0.001 100 0.3 [H]
0.5p 120k
3.5p [L]
TX: 7.0 V C283 5p [H]
R211 L29
R210
RX: 7.0 V 3.5p [L]
68k 27nH D19
33
4p [H]
C256 1SV307
C577
C223 0.001
C240
47p 0.1p
C258 C280 TX 3.0 V
0.5p 6.4 V
1p 4p [H] RX 0.0 V
10p [L]
Q22
Q23 Q48
Q18
L21 C260
2SC5107
2SC5107 2SC3356
33nH 47p R247 C289
DTC144EUA R212
3
4.7k 1p
220k TX 2.3 V
RX 2.1 V D20
2
MA77
1
Q19
TX 0.0 V
C586 2SC5107 R245
RX 2.8 V
C288
0.1 10k
47p
C243 R246
47p 1k
R8V
R8V
R213
R252 C295
100 [L] C287 C291
10 0.001 R253
10 [H] 18p [H] 0.001 D22 MA2S111
TX 0.0 V 4.7
10p [L]
C262
C261 RX 7.5 V
R422 R256
47p L27
6p [H] R215
18k
470 27nH
10p [L] 8.2k
C292 C293 C578 C299
C296
R244
Q21 1 0.001 47p
0.1 0.1 R278
33
2SC5107
1.8k
R254
L31
C294 56k
12nH [H]
R214 C263 R217 0.001 [H]
R255 C297 C300
220 47p 8.2k 0.01 [L] 15nH [L]
10 0.1 0.001
C266
0.5p
D17 R257 Q24 3SK293
D18
HVC350 4.7k [H]
HVC350
1k [L] R259
L28 TX 0.0 V
C303 C304 R258
C269 47k
15nH C271 RX 3.5 V
47p 270
10p [H] 0.001
R218 7p [H]
R219
9p [L]
220k 9p [L]
220k
TX 0.0 V
RX 1.9 V
R220
C270 C302
10k
0.001 0.001
8V 8V
CPU5 CPU5
5V 5V
IC39
TA8225L
R350
1k
C413
470p
R424
C442
R326 100k C471
47p C470
100k 100 C366
220
C445 10
47
IC34
C443 C444
C468
TA75S01F 100 100
220
L41
4.7H
R352 C469
R349
3.3k 0.001
5 3
220k
4
1
R366
2 3.3k
R354 R351
R353
C472
220k R367
68 68
0.047
1
C415 R329
100k
0.1
R368 C473
R327 1
0.047
100k
H_GND
R328 C446
C448 R355
10k 0.1
0.001
33k
5V
CP43
CP44
VCC
J13
5V CP56
GND
2 1
MD2
MD1
4 3
Flash for
C_RES
MAIN CPU
ARES
6 5 MD1
DIGITAL CPU
RXD2
CP43
8 7
TXD2
CP41 CP52
CP44 MD1 MD2
C509
10 9
47p
ARES CP42 CP45
C_RES
J11
C495
C511
47p
47p H_OUT1 13 CP43 CP46 RXD2
HANG 25
CP44 CP53
MMUT 12 TXD2
24
VCC 11
TXD
RCK 23
R439
10
1k
RXD
22
R440
9 8V
1k
ARES
3VA 21
8
CP55 CP56
20
C498 C504 C503
GND 7 25 pin
47p 47p 47p
19 CONNECTOR
6
18
CTS 5
BUSY 17
RTS 4
RDAT 16
RXD 3
15
2
TXD
H_GND 14
H_OUT2
1
5V
C499 C500 C501 C513
47p 47p 47p 47p
J10
CPU5
GND
2 1
ESCL
EEPROM
GND
4 3 Connector
ESDA
GND CPU5
6 5
VCC
T8V
IC29
C533 C534 C347 C357
47p 22p RA30H4452M-21 22 47p
[H-25W]
R299
RA30H4047M-21
[L-25W] 100
TX 6.9 V
RA55H4047M
RX 0.0 V [L-45W]
RA55H4452M C377 L38
[H-45W]
47p 1H
L33 C323 C324
D29
27nH 0.001 47p
XB15A407
[F2721D],
[F2821D]
C325 only
L35 L43
3p [H] L34 C374 L42
15nH 15nH
4p {L] 15nH 0.001 15nH
L56 C326 C327 R275 C345 C346 C348 C349 D30 C373 C375 C376 C388 C389
6.8nH 3p [H] 4p 150 3p 3p 2p 2p[H] UM9401F 5p 1p [H] 2p 2p [H] 2p [H]
4p [L] 3p[L] [F2721D], 3p [L] 3p [L] 3p [L]
C575
[F2821D]
1.5p
only
C353 C354 C355 C356
47p 0.001 22 470p
C351 C352
0.001p 47p FI5
FI6
NFE31PT152Z1E9L NFE31PT152Z1E9L
2 1 1
C350
C378 C379 C380 C381 C390
330 3 3
0.001 47p 22p 47p 0.001
2
C329 1 2
470p D21
DAN222TL
R293 1.8k
D25
DA221 R295 C382
1.5k 0.001
R281 R294
C383 R303
330 10k C358
0.3p 10k
10
APCV
Q26 R279
470k
R251 C405
2SK1829
C333
C332 0.001
100
2.2 L40
R280 D24 47p R318
15nH
10k MA2S111 C290 220
0.001
C330
TX 4.1 V
0.1
C331 L39 RX 0.2 V C406
L32 L36 R316
C298 3p [H] 1.5nH [H] 0.01
18nH [H] 18nH [H] C359 C360 100
APCV
2.5p [L] 18nH [L]
7p 22nH [L] 7p 0.001
22nH [L]
C334 C363 C385 C392 R319
L37
C384
8p 8p 5p [H] 0.001 68k
C361 33nH
0.5p [H] Q36
C335 [F2721/D],
R282 R283 8p [L]
18p [H] 2p [L]
[F2821D]
18p [H] 100k 100k C364 2SC4116
24p [L]
only
24p [L] 68p
[F2721D], [F2821D] only
D69
D68 D26 D27 D28 D31
HVC350 HVC350 HVC350 MA77 MA728 UM9401F
D23
C407 0.001
HVC350 R320
C336 R284 C362 PRF18BC4710B1RB [F2721/D],
0.001 10k [F2721/D], [F2821D] [F2821D]
0.001
only only
R8V
T8V
TX 7.9 V
RX 0V
R332 C417
10k 1
D60
DA221 TL
D59
D67 D66 DA221TL
DA221 TL DA221 TL
C421
1
5V
R469
C393 C394 C580 CP27
100
47 0.1 0.1
IC35
DS14C232TM
C420
1
16 1
VCC C1+ D58
15 2
DA221 TL
GND V+
14 3
R305
DOUT1 C1–
1k 13 4
C418
RIN1 C2+
12 5
1
ROUT1 C2–
11 6
DIN1 V–
10 7
DIN2 DOUT2
9 8
ROUT2 RIN2
R420 R436
Q40
47k 47k
R419
C419
DTC144EUA D49
10k
1
MA2S111
R377
5V 10k
8V
R306
CP21
220k
Q38
R302 Q33
DTC144EUA
220k CP24 CP25
2SJ144
C395 R336
C423
10 10k
0.1
R307 R334
1M 100k R337 C424
47 0.1
5V
R301 C453
D39 R335 C452
R333
100k
MA2S111 1k 0.001 0.001
1M
Q34
2SD1664
VCC
C422
T8V D37 R338 R339 R359 C454
0.001
DA221 4.7k 4.7k 4.7k 0.001
13.6 V
C397 C429
Q30 VCC
0.001 10 IC36
Q35
2SA1577
TA7808F
R8V
DTC114TUA
C457
0.1
O I
C387 C396 C398
7.9 V G
0.001 10 0.001
R311
10k C428
C430
10 0.1
R310
4.7k
R308 Q27 R309
22k 22k
DTC144EUA Q31
5.1 V 2SB1132
5V
6 5 4
C399 C400
Q32
10 0.001
XP6501
R312
2.2k 1 2 3
CPU5
VCC
T8V
R340
47
C552 C402
1.5p [Other] 10p [H]
ANT
4p 7p [L]
FWD
[F2710-H],
[F2810-H]
5p
L49
[F2721/D-L], W2
15nH
[F2821/D-L]
L44 15nH C573
C432
C401 5p [H]
1.5p
0.001
C391 C551 only [L]
REV
3p [H] 3p [H] only
R315
5p [L]
4p C461
47 C431 R362
R313
[F2710-L], 2p [H]
0.001 100k
100
[F2810-L]
3p [L]
R314
5p
R342
27k [H]
[F2721/D-L], R341
100
39kp [L]
[F2821/D-L] 39k
C403 C433 D40
FI7
47p 0.001 MA728
NFE31PT152Z1E9L
3
[F2721/D],
[F2821/D] only D38
MA728
HV HV
T8V
R8V
D35
R317
C404 C435
1SS375
270k
47p 47p
TX 0 V
RX 4.9 V
C434 D41 R363
0.22 MA2S728 4.7k
R343 150k C436
TX 2.5 V
1
RX 1.6 V
IC37
5
3 TA75S01F
4
1 R345
10k
2 R344
220k
R346 R364 C462
220k 8.2k 0.001
C438
0.0047
R347
390k C463
47p
R8V
T8V
HV
Q43
RCK DTC144EU
RDAT
IGSW
RXD
TXD
D57 J7
DA221 TL
8V
1
NTXD NTXD
CTS 2
NRXO NRXO
3
PGI3 IGSW
4
PGI1
5 GPS
PGI1
PGI2
6
PGI3
7
PGO1
CP28 8
PGO2
9
GND
10
RTS
D44
D47
DAN222TL DAN222TL
R370
RXD
100k
TXD
D48
Q44
DAN222TL
PGI2
DTC363EK
R391
100k
C486
0.47 5V
8V
R374
PGO1 10k
R371
Q39
10k
PGO2
DTC144EUA
HV
J8
VCC
1
DIM
2
HORN
3
GND
4
AFO
5
OPC-617
GND
6
DET
7
GND
8
IN
9
GND
10
PTT
11
C474
C455
0.001 47p
C482
0.001
BATV
Q41
R372
DTC144EUA
300k
R373
100k
C485
Power OFF 4.6 V
0.001
ON 0.0 V
VCC
W3
Q42 OPC-1414
2SJ377
EP10
HV
EP11
D46
C459 R360 R361 DSA3A1
470 10k 470
R378
C475 C476 C477 22
DC cable
47p 0.001 470
IC40
AN78L05M
O I
G
C460 C458 C478
0.1 10 0.1
5.1 V