Icom IC-F21 Service Manual page 35

SECTION 12 VOLTAGE DIAGRAM
12-1 MAIN UNIT
VCC
T5V
S5V
+5V
+5V
R47 47
C82
R50 R51 C252 0.1
S1
56 47 k 100 P
REF
F1
C84
C85 D19
0.001
2.2 HVC362 C253 9 P
BAL
C93
S2 47 P LVIN R244 22
F2
16 1
R OSCIN
15 2
R232 P OSCOUT
IC1 MB15A02PFV-1
150 k 14 3
FOUT VP
13 4
C94 R52 NC VCC
12 5
47 P 1k FC DO
PLST 11 6
LE GND
SO 10 7
DATA LD
SCK 9 8
CLOCK FIN
UNLK
LOCK 4.5 V D20 C86
UNLOCK 0.5 V MA2S111 0.001
DEV
+5V
R5V
C92
EP7 S5V
W13 W12 0.1
R96 0 V
3.5 V C150
1.2 k
4 P
J1
C153
R97 L28
[F21]only 0.01
680 k 0.22 H
CBI0
1 C149
From C151
2 CBI1 7 P
56 P
SW-A UNIT 3 CBI2 C152
Q18
4 CBI3 10 P
2SC4116 GR
C154
220 P
SQLIN
C159 C158 C157 C156
R100
0.001 0.001 0.001 0.001
22 k
R99
J2
1.2 k
CBI0
C155
1
220 P
2
From/to 3
VCC VCC
SW-A and SW-B 4
RLED
5 S5V
UNITS 6 TLED
+5V
7
VOLOUT +5V +5V
VOLIN
R141
470
C162 C161 C160
PTT ON 4.8V
470 P 0.001 47 Q22 UN911H
PTT OFF 0V
PTT
C190 R142
0.1 100 k
C189 C188
470 P 10
MIC
VOLIN
VOLOUT
AFOUT
SQLIN
VCC
4.9 V 0 V
0 V 4.9 V
+5V
S5V
SPEAKER
R5V
Q26
SP1 CHASSIS UNIT J3
T5V
W1 SP 2SA1577 Q
1 1 Q27
2 R173
2
C213 2SA1577 Q 10 k
OPC-963 0.001
R174
4.7 k R172
4.7 k
MIC
MIC MC1
C211
C212
R175 0.01
0.01
33 k
C215
0.001
PTT
S1
C214
47 P S5V
R213 R5V
470
J4 OPT
EXT.MIC EP4
MIC
EP5
R211
C237
100 k
0.001 R245 R210 R216 R217
100 120 k 22 k 47 k
J5 AFOUT
R214
SP
Q32 1 k
CLONE
EXT.SP DTC144TU
D17
RB706F-40
C258 R222
R215
47 P 68 k
C240 C239 C238 22 k
47 P 0.001 0.001
R223
68 k
C242
BDET 0.0027
12 - 1
VCC
T5V
S5V
Q12 XP6501 AB
6 1
+5V
5 2
+5V R44
C55
4.9 V Q13 1 k 4 3 C57
LV 7 P
47 P
2SK880 Y
R48 C78
82 k 0.001
X1 R220
Q31 C58
2.2 k
2SC4215 O 10
C81 L14
R49 100 P C80 4.7 H
47 k 47 P C59 D5
47 P
D21 R45 HVU350B
R43
MA2S111 C83 R46 10 k
47 k
100 P 1.2 k
C73
47 P
C69
L17
4.7 H 7 P
15.3 MHz R42 R40 C68
0.75 V P-P R41
4.8 V 1 k 6.8 k 3 P
3.9 k
C75 C74
C77
C76 0.1 0.001 D7
0.047
1 HVU350 B
R53
L18
47 C90
C88 C87 15 nH C91 R39 R38 C72 R37
C89 6 P 6 P 0.001
0.1 47 P 100 k 22 k 100 k
0.001
DEV
+5V +5V
R5V R5V
S5V S5V
R94 0 V R221
C148 R95 X2
47 4.7 V 100 k
3 P 150 CDBCA450CX24
R92
C143
1.8 k C137
IC3 TA31136FN 0.001 R91
100P
L27 1 16 470
0.82 H FI2 OSCOUT MIXIN
ALFYM450F=k 2 15
OSCIN GND
3 14 R90
O I MIXOUT N-REC
4 13 C140 120 k
VCC N-DET
5 12 120 P
IFIN RSSI
6 11 R93
DEC IFOUT C139
7 10 330 C138
FILOUT QUAD 0.001
0.001 Q17
8 FILIN AFOUT 9
2SC4215 O
R98
47 k
C147 C146 C145 C144
0.1 0.001 1 0.001
C142
0.001
VOC
S5V
+5V
R133
12 k
C186
C187
0.0056 IC5C NJM13403V
0.022 C183 C182 C181
10
8 0.1 0.047 0.047
2.1 V
9
R140 C184 R131
R138 5.6 k
15 k R139 180 P R134
470
100 k 4.7 k R132
10 k
R137
C185 R136
180 k
0.1 10 k
MIC
VOLIN
VOLOUT
AFOUT
WIDE
NAR
SQLIN
VCC
Q24 2SB1132 R
+5V
IC10
NJM2870
T1
R169 T2
R171 10k
T3
10 k 6 5 4
T4
Q25 DAST
XP6501 AB
Q23 SCK
C206
C205 SO
1 2 3 DTA144 EU 10
0.1
R170
R168
2.2 k C207
C210 C209 C208 470 k
10 C259
22 0.1 0.01
0.01
S5V
R5V
C236
R218 R219 0.022
100 k 220 k
R5V
5/2 tonecode
C223
transmitting C228
C243 47 P C245
3 V P-P R198 0.1
0.0056 0.0082
22 k
3 8 5
1 7
2 6 R197
R225 R226
R224 4 22 k
68 k 68 k
68 k
IC16A C246
C244 IC16B NJM12904V
180 P NJM12904V 68 P
C230
0.01
C231
0.039
VCC
T5V
VCO5V
R29 R28
EP2
C56 3.3 k 2.7 k
1 C48
C52
0.001
4 P W4
Q10
C50 2SC5085 Y
C54
7 P
6 P L13
C53 4.1 V
11 nH C45
4 P C51 C49
47 P
8 P 0.5 P
R31 EP3
3.3 k
R24
R32 C61 C60 1.8 V
Q11 3.7 V 100
3.3 k 47 P 0.001 0 V
2SC5085 Y
R30 C46 R25 R23
R26
C67 C66 C63 330 470 P 330 68 k
C65 68 k
0.3 P 1.5 P 5 P C43
5 P
470 P
L16
L15 C62
11 nH C64
0.68 H 0.5 P 5 1
10 P
Q8 C44
R33 2
Q9 XP1214 DTC144EU 3 P
D6 R240 220
R34 C70 4 3 Q7
MA368 82 k Q6
120 k 0.001 0 V
1.7 V 2SC5107 O 2SC5107 O
R27
C71 R36 R35
10 k
1 18k 100k C47
47 P
C251
0.001
R5V
S5V
RSSI
R89
1 k
R83
0 V
0 V 100 4.5 V
2.9 V C126 R80
C130 R84 C129 L26 R81
5 P 12
FI1 0.01 1k 12 P 1.0 H 470
C136 C123
FL-313
0.001 22 P
Q16
R85
C132 3SK272
R88 1 0 V
0.001 L24
180 1.0 V
R86 R82 L25 R76 10 nH
C133 270 47 k 33 nH 4.7 k
5 P
C128
C127
0.001
47 P
R87 C134
2.7 k 20 P
VCC
S5V
+5V
IC5B NJM13403V
2.1 V IC6 BU4066BCFV
5 R127
7
10 k 1 14
6 I/O VDD
2 13
R129
O/I CONT.A
10 k 3 12
O/I CONT.D R124
R130 4 11
Q21 DTC144EU I/O I/O 27 k
12 k 5 10
CONT.B O/I
6 9
CONT.C O/I
7 8 C179 R125
C257 C180 R126 VEE I/O C178
R128 1 1 M
0.1 47 k 0.0022 1 0.01
R242
3.3 k
VOLIN
VOLOUT
AFOUT
4.8 V
0 V
L29 39 H
IC9 M62363FP-650C
4.8 V
R165
1 24 DET C202
470 C201
VIN1 VIN8 0.001
T1 T1 2 23 SQLIN 47 P
VOUT1 VOUT8
T2 T2 3 22 DEV
VOUT2 VOUT7
T3 4 21
VIN2 VIN7 IC8 S-80942ANMP-D6
T4 5 20
VDD GND
DAST DAST 6 19
LD RESET +5V 5
CD
SCK SCK 7 18
CLK VDAREF
SO SO 8 17 4
DI DO NC
9 16
VIN3 VIN6
T3 10 15 BAL
VOUT3 VOUT6
R167 R166 T4 11 14 REF
VOUT4 VOUT5 C200
470 k 470 k
C204 12 VIN4 VIN5 13 0.027
0.01 C203
0.01
R204
390 k
S5V S5V
R208
C235 R203
100 k 2 4
820 P 56 k EP6 4.9 V
1
3
11 IC5A 2.5 V Q29
R207 R206 R205
NJM13403V
R209 39 k 82 k 180 k 2SC4116 GR
100 k C234 R182
C233
820P C232 47 k
0.1 R185
0.0012
27 k C220
R187 820 P
470
C227 1
R184
0.01 R189
5 R188 47 k
R195 100 k
4 3 470 k
120 k
IC13 C222 0.047
C226 R192
3 8 0.1 18 k TC7S66FU 2
1 6 R186 150 k
R196 2 7 0 V
R190 5
22 k 4 R193 1.8 V
220 k C224 47k IC12B
0.033
0 V NJM12904V
0.7 V
IC12A R191
CTCSS code transmitting
C229 NJM12904V R194 C225 47k Q30 XP1213
3.1 V P-P
0.0068 68 k 4.7 4 3
2
PUSE
5 1
VCC
T5V
VCO5V
C260 C34
0.001 47 P
R13 R11
220 10
C35
R19 R16
47 P
R22 100 10 k 3.7 V 4.7 V
3.3 V 220 3.5 V 0 V 0 V
C21
C37
C40 0.01
L11 0.001 R17 C30
470 P
27 nH R20 L10 100 R15 R12 0.001
R14 L8
47 k 27 nH 56 k L9 12 k
C41 1.3 V 2.1 V 1 k 12 nH
15 nH C31
12 P C39 1.2 V D3 0 V
470 P
5 P MA77
C29
R21 12 P
C36 C33 C28
C42 33
C38 10 P 10 P 5 P R10
12 P Q4 Q3
D4 5 P 4.7 k
MA77
Q5 2SC5107 O 2SC3585 R44
2SC5107 O R18
4.7 k
0 V
2.0 V
R5V 0 V
S5V 4.6 V
S5V
RSSI RSSI
R77 R69 C249
R66
1 k 47 0.1 Q33
10 k R228
C111 L22
C125 R78 C124 2SK1829 470 k
R79 5 P 10 nH R229
10 P 10 k 0.001 C112 0 V C108 C107
470 1.8 k
C119 D14 0.001 4.6 V 47 P 0.001 R64
0.5 P
HVU350B 100 k
D15
0 V C106
C115 C113 Q15 3SK293
0 V 3.1 V 3 P
L23 0.3 P 8 P
2.0 V R65 L21
C120 C117 10 nH
220 k 10 nH C105
8 P R74 8 P R70
R72 D13 3 P
220 k 220 k
220 k C116 HVU350 B
C122 C109 R68
6 P C110
5 P C114 47 P 0.001 330
R75 C118 R73 R71 47 P
10 k C121 47 P 10 k 10 P
47 P
VCC
S5V S5V
R118 R115
220 k 120 k
C176 R119 C174 180 P
AF ON
0.0033 150 k R116
4.8 V
33 k R113
R123 13 470 R110
14 R111
120 k 12 3.3 k
18 k
IC5D
C177 R120
R117 NJM13403V
R122 R121 2.2 39 k R114
100 k C173
10 k 0.8 k C175 0.0056 10 k R238
0.1
100 k
R112 C172
2.2 k 47
BEEP 2.1 V
C248 0.1 VOLOUT
AFOUT
R151
NTCCM20124AG473JCT C191
R157
0.1 TEMP
12 k
R152
R160
100 k
10 k C195
C197
OUT 1 68 P
22 OSC1
2
VDD
3 X3
VSS OSC2
C199 C196
D16
0.001 470 P R158 14.7456 MHz
MA77 R155 1.1 V P-P
12 k R156 10
R176 R159 1 M
22 k 12 k
C194
C193
R177 15 P 22 P
22 k RES
CENC2
C198
R178
R163 0.1
56 k 16
CENC1 1 k
4 1 EXST
Q1 STR
CENC0 RMUT 5 2 SO
Q2 D
MMUT 6 3 SCK
Q3 CLK
R179 7 15
Q4 OE
180 k 14
R180 Q5
13 IC15
47 k NWC Q6
12
S5C Q7 BU4094BCFV
11
R181 Q8
C218 R5C
47 k
0.0082 T5C 9
QS
C219 10
0.1 R164 QS
1 k
8
Q28 DTC144EV R161 10 k
CPU5V
DUSE
DTCS 8 A0 1
4.5 V VCC
7 A1 2
WP
6 A2 3
SCL
5 VSS 4 C247
SDA
0.1
R202 IC11
100 k C216
HN58X2416TI
0.01
VCC
T5V L2 L1
14 nH
14 nH
L6 R2
EXCCL3225U 100 C6
VCO5V
0.001
C9 C8
W14 L3 C5 C3 R1
0.001 47P
0.82 H 4 P 7 P 82 k
L30
C20
C18 0.30-0.9-9TR
0.001
W2 47 P D1
L5 C12 L4 1SV307
0.4-0.9-2TL
0.001 14 nH C7
C24
C255 39 P 0.001
Q2
0.001 Q1
2SK2973 R3
R5
R8 2SK2974 15 k
10
100
MP5 D2
C26 R7 C17 C13
0.001 RB706F-40
4.7 k 36 P 12 P
C14
R9 R6 C25 C23 2.4 V
10 P C15
33 k 3 3k 0.001 20 P 0 V R4
0.001
1 k
C27
470 P
S5V
EP8 W8
0 V Q14
0.6 V C97 R55
DTA144EV
0.1 2.2 k
R227
180 k
1.6 V
C98
D18 C102 L20 L19 4.4 V
0.01 R58
MA2S111 1.5 P 14 nH 14 nH R56
150 k
10 k
2 3
D12
4
HVU350B 1
R60
R61 5 R59 R57 R54
100 C96
C104 1 k 120 k 68 k 10 k
R62 0.1
7 P IC2
220 k
D10 C100 D9 C99
MA77 8 P MA77 9 P TA75S01F
R63 C103
R239
10 k 47 P
100 k
VCC
AF ON
Q19
AF ON IC4 TA7368F 3.4 V
2SB1132 R 7.5 V 1 10
NC POUT
2 9
VCC PWGND
3 8
NC PREGND
4 VIN PHASE 7
6 5 4 5 RIPPLE NF 6
R104 R243 R102
R105 10 k 1 k 10
D22 R103
R109 2.7 k
MA2S111 C167 33
68 k C163
1 2 3 0.047
100
Q20
XP6501 AB C166 C164
C165
10 0.047
C171 R107 C170 R106 C169 C168 47 P
0.22 1 k 0.1 3.3 k 6.8 0.22
VOLOUT
AFOUT
R153
100 k
BATV
4.9 V
CPU5V
R149
1 k
R212
R241 R143
15k
REMO 1 k 100 k
C192
R154
0.1
100 k
1 NC 48
NC
2 47
NC NC
CPU5V 3 46 CLO
AVCC P22/TXD
4 45 CLI
X2 P21/RXD
X1 5 44 ESDA
X1
VCL P20/SCK3 AFON
6 VCL 43
P87
RES 7 42 TLED
RES IC7 P86
TEST 8 41 RLED
TEST P85
VSS 9 HD6433664A24FP 40 TXC
VSS P84/FTIOD
OSC2 10 39
OSC2 P83/FTIOC
OSC1 11 38
OSC1
P82/FTIOB
VCC 12 37
VCC P81/FTIOA PTT
13 36
P50/WKP0 P80/FTCI EXST
14 35
P51/WKP1 NMI DAST
15 34
NC NC
16 33 PLST
NC NC
R145
R146
100 k
100 k
R199
R200 R201
47 k
1 k 1 k
R233
R234 100 k
100 k
ANT