Icom IC-F50 Service Manual Addendum page 53

SECTION 11 VOLTAGE DIAGRAM
11-1 MAIN UNIT
VCC
T5V
S5V
+5V
REF
X2
15.3MHz
1 4
VCOM VCC
1.2Vp–p
2 3
GND OUT
R103
470 k
C211 R102
4.7 47 k
BAL 2
1
R104 220 k
REF 3
IC16
NJM12904V
/IN
EP6
S5V R97
1 k
D24
R93
MA2S111 1 k PLL
UNLK
R117 4.7 k
SCK
IC4 MB15A02PFV–1
R118
9 8 C209
4.7 k CLOCK FIN
SO
10 7 0.001
DATA LD
PLST 11 6
LE GND
12 5
FC DO
13 4
NC VCC
14 3
FOUT VP
15 2
P OSOUT
16 1
B OSCIN
MOD
R5V
+5V
8
IC16
V+
NJM12904V
GND
4
+5V
DAST
C161
10 P
IC17
TC4S66F
Q19
2SC4116BL
6
7
LVA 5
R111
100 k
IC16
NJM12904V
C241 C242
5.0 0
0.001
0.001
0 5.0
S5V
R5V R5V
+5V
T5V +5V
VCC VCC
2SB1132Q
S5V S5V
T5V T5V Q21
2SA1577Q
Q26
TPC6103
F1
1 2
4
3
MP2
2
(CHASSIS)
1
R168
100 k
C300
0.001
C299
0.001
IC7
C298 EW–460
0.001
1 I 2
O
G D12
38 VCC
36 MA2S111
VCC
35
34
+5V Q29
33
S5V
32 DTC144EV
31
30
29
CSFT
28
DAST
27
MRDF
26
MDIR
25
UNLK
24
TEMP
23
RSSI
22
From / to LVIN
21
the J401
20
CDEC
19
at the
SDEC
18
Front Unit
NOIS
17
MTCK
16
MTDT
15
EXOE
14
EXAT
13
SCAT
12
PLST
11
SCST
10
MSCK
9
MDIO
8
SCK
7
SO
6
SIGNAL
5
CDCS
4
TONE
3
2
MIC
1
37
J1
VCC
T5V
S5V R98 2.2 k
+5V
Q17
2SC4116BL
R89 C127 L26
47 P 68 nH
10 k
Q18
2SK880Y
L28
3.3 H L39
33 nH
C124 L25
220 P 82 nH
R95
5.6 k
L27
C207
3.3 H
10 P C150
L38
1
68 nH
L32
33 nH
0
MOD
4.8
R5V
R39
47
0
3.1 C166
IC1
3 P
TA31136FN
FI2
1 16
ALFYM450F=K OSCIN MIXIN
2 15
OSCOUT GND
2 1 C61
3 14
C163 N-REC
MIXOUT 100 P
4 P 4 13
C168 0.1 VCC N-DET
5 4 3 5 12
IFIN RSSI
6 11
DEC IFOUT
C62
7 10
FILOUT QUAD
8 9 82 P
AFOUT
FILIN
R44
390 k R45 R43
C169
150 k 470
0.1
R113 4.7 k
C69
100 P
5.0
5.0 +5V
S5V
+5V
Q23
TEMP
SIGNAL
IC5 IC5
NJM12902V NJM12902V
10
8
CDEC 7
Q25
9
Q24
R186
DTA144EU
470
XP6501B
R185
470 k
R153
150 k
C225
470 P
C170
0.1
R152 C172
560 k 0.001
TONE
S5V
R147
4
IC5
100 k
V+
GND NJM12902V
11
R180
1 k
SDEC
S1
NOTES :
R85 R79
1.8 k
4.2 3.9 k 3.8
Q14
2SC4226R25
C126
33 P
R81
L42 R87
ERJ2GE–JPW
3.3 H
470
R84 R83
3.9 k 1.8 k
Q12
Q11
2SC51070
2SC51070
C123 R82
68 P 4.7
1 R5V
5
Q16
Q13 2
DTC144EU
R88
2SC4226R25
560
4 R5V
L43
3.3 H Q15
0 2.4
XP1214
2.4 0
R5V
0
4.7
R5V
C49
2 P
0
4.6
X1
FI1
Q3
C58 R33
FL–335
0.001 330 C41
3SK299U73
2 1
10 P
Q4
2SC4215 O
0
0
0
1.1 4.8
C43
0.9
0.001
+5V
+5V
R189 220 k
R188 C219
220 k 1
13
IC5
14
IC6
NJM12902V
12
R119 C228 M62363FP–650P
10 k 0.001
1 24
VIN1 VIN8
2 23
VOUT1 VOUT8
3 22
VOUT2 VOUT7
C223 0.1 4 21
VIN2 VIN7
5 20
R182 R181
VDD GND
6 19
22 k 22 k LD RESET
5
7 18
CLK VDAREF
8 17
R183
DI DO
6
9 16
22 k VIN3 VIN6
10 15
VOUT3 VOUT6
11 14
VOUT4 VOUT5
12 13
VIN4 VIN5
C171
C218
4.7 4.7
R151
68 k
+5V
1 8
2 7
3
6
IC5
PMFM
4 5
NJM12902V
IC11
2
TC4W53FU
1
3
R133
18 k
C265
0.001
R130 R131 R132
2.2 k 2.2 k 4.7 k
C261
1
C262
1
IC10 AK2346
R121 1
AGNDIN TEST
2
12 k
AGND RXIN
3
TXIN REINF
4
TXINO RELPFO
+5V 5
LIMLV REAF
6
EXTLMIN REAFIN
7
MOD EXPOUT
8
R122 VSS VDD
9
390 k TCLK XIN
10
TDATA XOUT
11
C250
DI/O DIA
Voltage line
47 P 12
RDF/FC SCLK
C249 C246
Common line
47 P 47 P
TX line C248
47 P
C245
RX line
C247
47 P
47 P
VCC
T5V
T5V
4.0
L20
5.0
EXCCL3225V
0
3.9
C102
7 P
Q8
RD01MUS01
C100
C93
10 P 15 P
C92
Q9 100 P
Q10 D14
2SC5100
MA2S077
2SC51070
1.1
0
TX:+2.5dB
RX:+1.5dB
C183
C182 0
10 P 0.001
1.1
R5V
R172
Q1
22 k
0
2SK1829 R174 D23
470 k MA2S111
4.8 C186
0.1
R28
12
0
1.5
C37
0
0.01
C40 1.1
1.5 P C29 C22
2.5 P 1 P
D10
HVC375B D4
HVC375B
C24 0.001
0
R22 C42
2.7
10 k 0.001 C27 R14
0.001 10 k
+5V
+5V
IC12
BU4094BCFV
EXSM 1 16
STR V+
SO 2 15 EXOE
D OE
SCK 3 14 TMUT
CLK Q5
R5C 4 13
PMFM
Q1 Q6
T5C 5 12 MUT1
Q2 Q7
6 11 MUT2
Q3 Q8
S5C 7 10
Q4 Q'S
8 9
GND QS
C271
R141
33 k 0.1
IC13 BU4066BCFV
C264
1 14
22
I/01 VDD
+5V
2 13
O/I1 CONT1
3 12
C263
O/I2 CONT4
4 11
0.001 I/02 I/04
5 10
CONT2 O/I4
6 9
R124
CONT3 O/I3
33 k 7 8
VSS I/03
24 R123
23
82 k
22
21
20
19
18
17 +5V
C256 R127 C257
16 0.0022 33 k 0.1
15
14
R126
R135
13
1 M
1 M
R128 C258
33 k 0.1
X4
CR–765
3.6864MHz
2.0Vp–p
11 - 1
T5V T5V
1.7
0
C82
0.001
C6
L3 L2 L1
50 nH 0.001 3.0 nH 32 nH
Q7
C86
C7 D2
RD0MVS1
100
0.001
1SV307
C2
C4
8 P
11 P
C302
47 P
L16 L4 C10
10.5 nH
50 nH 0.001
C25 L6 L5
C19
6 P 0.001 39 nH 50 nH
T2
1.9
2.2
TMUT
2.6
2.4 0
0 4.9
0
T5V
D25
C79
0.1 MA2S111
TMUT
R8 220 k
R5
5 10 k
3
4
1
IC2
R9
100
TA75S01F 2
T2
+5V
R195
10 k
Scrambler ON
C274
C276
+5V
0.1 1 Q27
5.0
DTA144EU
C277
C275 1 0
1
IC15 TC3W03FU
15 22 MIC 8 1
RXOUT TXIN VCC CE
14 23 7 2
IC LFO/P B XT
IC14
13 24 6 3
VDD A XT R144 1 M
VSS
12 1 5 4
FX214LG
AT X/CLK Q GND
11
2
LD/LTH X
10 3
SCIN SDIN
R145
X3 CR–746
0.00MHz 10
5.7Vp–p
C289
0.1
C273
0.1
J1
(CHASSIS)
From /
to the
antenna
connector