Icom ic-f5021 Service Manual page 34

SECTION 12. VOLTAGE DIAGRAM
FRONT UNIT
SML-311YT
SML-311YT SML-311YT
R7
DS3 DS2 DS1
180
SML-311YT
R8
DS6
DS5 DS4
180 SML-311YT SML-311YT
SML-311YT DTC114TU
SML-311YT
Q5
R9
DS9 DS8
DS7
470
SML-311YT
DTC114TU
Q2
R12
Q1
2.7K
2SC4116
AFVI
AFVI
POSW
S1
POW SW
KEY
KR0
KR1
KR2
KR3
S2 S3 S4 S5
KEY
P0 KEY P1 P2 KEY KEY
P3
KS4
S6 S7
KEY KEY
UP DN KS1
KS0
MAZ8056GM
D2
R18
J1 5V
8V R15
1 100K
CLO CLO
2
1k
AFO
3
PTT R76 IPTT
4
M ICE 8V
1k
5 L1
MIC
6
GND 10U
7 R16
CL I (HANG) CL I
8
1k
R19
100K
DS11
A01B011X
IC6
C79
COM3 37
COM3
38
COM4
0.1
COM4
R74
CPU5V 39
VDD
40
R73 VLCD
10K 41
VLCD1
42
LIGT2 10K
VLCD2
43
VSS
44
OSC
45
INH
46
CE
47
CL
48
DI
LC75834W
LIGT1
100K 100K
R84 R82
R83
100K
R20 R23
CENC0
180K 47K
R21
CENC1
56K
R22 R24 R26
CENC2
22K 47K 47K
CP3 R65
CP05S 1k
C21
0.001
R33 R35 R36 R37
SENC
22K 68K 68K 68K
R128
R32
10K 15K
150K
R44
C27
270P
NJM12902V
C26 R41
9
R46
8
27K
0.1
10
1k
IC5
12 - 1
CPU5V
24 SEG22
S24
23
SEG21
S23
22 SEG20
S22
21
SEG19
S21
20 SEG18 IC3
S20
19 1 8
SEG17
S19 A0 VCC
18 SEG16 2 7
S18 A1 WP
17 3 6
SEG15
S17 A2 SCL
16 SEG14 4 5
S16 VSS SDA
15 SEG13
S15
14 SEG12 S-24CS64A0I
S14
13 SEG11
S13
J3
CPU5V
2 1
4 3
6 5
8 7
10 9
12 11
14 13
CPU5V
NJM12902V
13
R28
14
TENC
R27
12
4.7K
IC5
47K
Q3
DUSE
D TC144EU
C23 C125 R90
BEEP
0.01 0.1 390K
IC5 R38 R39
IC5
3 5 TONE
68K 68K
1 7
2 6
NJM12902V
NJM12902V
AFO
8V
R48
0
4
V+
IC5
GND
11
NJM12902V
C31
0.1
CR-774
MA2S077G0
X1
R101
C104
12K
22P
R106
C102
0.1
1M RES
C103
0.1
CSFT
MD2
HANG
R119
DAST (OPV3) R118
DI M (IGSW/DIM) 1k
PTTI 1k
PTTO
NOIS R117
1k
MA2S1110G
D5
76
SI
77
78
CLO
CLI R116 79
80
CIRQ
ESDA 1k 81
( MCH1) 82
PGIO3
PGIO2 (MCH0) 83
ESCL 84
PWON 85
86 IC1
87 HD64F2238BTF13V
88
89
R124
LSO 90
LSCK 1k 91
LCS 1k 92
LINH R125 93
LIGT2 94
95
96
R111
SCK 1k 97
SO 1k 98
99
R112
100
R115
1k
C77
0.047
J2
GND
12
TONE
34
C38 47P TENC
56
NOIS
78
EXOE
91 0
EXST
11 12
UNLK
13 14
PLST
15 16
CDEC
17 18
SDEC
19 20
OPV1
21 22
RSSI
23 24
LVIN
25 26
TEMP
27 28
BATV
29 30
DSDA
31 32
PGIO2
33 34
5V
35 36
L2
CPU5V CPU5
37 38
1.0U AFO
39 40
RES
IC2
1 5
OU T CD
2
VDD
C107
3 4
VSS NC
0.027
S-80942CNMC
AFVI
TEMP
R SSI
50
LVIN
49 BATV
48
R114
47 100K CDEC
46
SDEC
45 R127 BEEP
44 SENC
1M
43 CP06S
42 SDEC2 CP2
41 OPV1
40 DSDA
39 POSW
38
R120 1k
37
36
R108
35 ULCK
34 1k OPT3
33 OPT1
32 R109 OPT2
31 PLST
30 1k (EPTT) PGIO1
29
R121 1k
28 EXOE
27
(OPV2) EXST
26
R122 1k
DIM
DAST
OPT3
OPT2
OPT1
PTTO
PTTI
PGIO3
SCK
SI
SO
CIRQ
CCS
MIC C69
47P
EPTT
PGIO4
PWON
BEEP
8V C74
47P
GND
*; Refer to "PARTS LIST."