Icom IC-718 Service Manual Addendum page 24

January 2013
VOLTAGE DIAGRAM
L8
10H
R20
470
2.0V
1.3V
R21
10k C26
100p
Q11
2SC2714
0.5V
R19
220
C126
R116
0.0047
100
R24
2k R25
2k
C27
0.0047
R26
R27 C28
1k
2k 0.0047
R28
1k R29
2k
R30
1k
R31 12
44
VSS VDD
2k
13 43
DA0 CON_CLK
14 42
DA1 DATA
R32
15 41
1k R33 DA2 STRB
16 40
2k DA3 VSS
17
IC2 39
DA4 VDD
18
38
VSS SC-1287A P2
19 37
R34 C29
DA5 (TC190G02EFG-0058) TREE
R35 0.0047
1k 20 36
2k DA6 P1
21 35
DA7 UL
22
34
DA8 VSS
R36
1k R37
2k
C30
0.0047
R38
1k
R39
2k
C31 C32
R40
0.0047
0.0047
1k R41
2k
R42
1k R43 L12
2k ELJPA 100KF 10U
4.6V
C33 C34
100 0.0047
BFO
CP201
WS2
R52 C55 L15
P5 J2
680 0.0047 15H
BFO
MAIN
1 1
unit
2 2
J2001
BFOE
R53 R51
C53 C51
C54 C52
3.9k 3.9k
0.5p 2p
22p 27p
CP202
W10
13V
L2 C12
10H 0.0047
R12
7.9V
15k
X1
1.7V
L3 CR-337 Q9
LW-25A
2SC2714
1.1V
C13
0.0047
C15
33p
C14
82p
C21
C16 R14
100
R13
4.7k
TZBX4R200BA110T00 20p 470
C25
120p
C23
0.5p
2nd Lo
L7
WS1B L6
LS-471A
LS-471A
P2 P1 J1
W101 W102 L49 0.12H L50 0.12H
2LO 2LO
MAIN
1 1 1
unit C24
2LOE
2 2 2
J401 15p
2LOE
EP101
C227
56p
EP102
7.9V 3.2V
8V
R191 180
5V
3.9V
Q34 C194
L25 L26
R57* W7
470p
10H LW-25A
L2SC4081
C68 R192 C5 C195
0.001 1k 33 470p
C1
100
1.0V
C165
TZBX4R200BA110T
20p C62 C63 L19
E544GN-110248
100p 0.0047
Q18
2SK508
C67
100p
C65 R74 L38
1p 8.2k 1H
L27 D4 2.4V
LW-25A KV1470 C64 R49 2.2V
0.0047 220
R2
100
Q26
2SC2714
C2
C168 10
0.047
R75 C103 R78
3.9k 0.0047 100
R3
D15
2.2k
CK
1SS226
DT CP2 CP20
R6
PST
10k
1.9V
W9 LFO
CP30
C228
CP1 2.2 CP3
8V
5V
0V
R180
2.2k
Q35
R182 D16
L2SC4081
33k
DA2S10100L
C222
R183
R181
0.0047 C223
4.7k
0.6V 15k
0.1
L47
10H
8V
L14
12H
C203
0.0047
C50
22p
L4
LS-472C
L5
10H
C17
R15
0.0047
100 R16
22k
7.2V
R121 C132
1.9V 220 100p
Q10 C18 R17
100p 220 4.8V
C20 2SC2714
15p
1.4V
5V
R23
10k
C22 C19 R18
0.0047
0.0047 220
C10
0.1
20
8V
C112
56p
L30
10H
C109
C106 L32
0.0047
0.0047 0.82H
7.8V L34
0.1H
R85 C108
R169
8.2k
0.0047 33
Q28
R156 2SC2714
R171 R172
180
W1
180 180
C111
1.3V
R84
0.001
3.3k 1.9V
R87
C104
L41
100
0.0047
10H
7.9V
C129
0.0047
R7
220 R88 R158
R90
L42
100 100
1.4V 470
0.82H
C118 6.8V
7.8V
C160
0.0047
0.0047
1.8V 7.0V
R159
Q29 L39
R89
0.82H 10k R117
C119 470
2SC2714 C159 47k
0.001 0.001 0.5V
Q32 Q30
R10 2SC2714 2SC2714
2.5V
22k
2.9V
R8 R160 0.5V
C127
220 10k
R161 0.001
C120
R9
220 R118 C128
22k 0.0047
2.2V
47 0.0047
4.6V
L1
10H
C3
R132 C6
0.0047
2k 10
R155 C143
C148 C192
R133 2k 0.0047
0.0047 0.0047
1k
R144
R134
2k
1k
R145
C149
R135 2k
0.0047
1k
1
VSS
2
SYSCLKO
3
R146 VDD
R136 2k 4
1k VDD
5
VSS
6
DA0
7
R147 DA1
R137 8
2k
DA2
1k
9
DA3
10
VSS
11
R148 DA4
R138 12
2k
DA5
1k
13 IC6
DA6
14
SC-1246A
DA7
15
R149 VSS
16
R139
2k VSS
1k 17
DA8
18
DA9
19
R150 DA10
R140 20
2k
DA11
1k
21
VDD
22
TE1
23
C150
TE2
R151
R141 0.0047 24
2k
TE3
1k
25
VDD
R152
R142
2k
1k
C151
0.0047
R153
R143
2k
1k
C152 C153
0.0047 0.0047
R154
C172
2k
27p
C191
C188
2.3V 0.0047
0.1
R166
IC7 1M
L46 L45 L44 ST7063C-QG
C158
18H 22H 27H 0.001
1 5
2
L9 1H
C156 C136 C135
3 4
22p 12p 4p
R164
R165
C157 C138 C137 C134 1k
39p 56p 68p 56p 1M
C167
C161 R5
0.0047
0.047 100
LFO
13V
8V
C4 C66
10 0.0047
IC1 TA7805F NQ
10.3V
R102
22
13V
I
O
G
C9 C8 C7
10 10 0.1
C114 L36 L37
39p 0.1H 82nH
C116
L35 8p
0.15H
C115 C117
24p 33p
PLL UNIT
L48
C130 R120
0.68H 0.001
47k
C225 C226 R119
3p 3p 47k
CK
DT
PST
RESET
DT
CK
CON0
CON1
CON2
DST
C139
0.0047
75
ETCO0
74
ETCO1
73
ETCO2 D12
1SS184
72
VSS
71
ETCO3
70
ETCO4
69
VSS
68
ETCO5
C146
67 R127
ETCO6
0.0047
66 2.2k
ETCO7
65
VSS
64
VDD W170
Q12
63 C147
Q4MA 0.0047
62 L2SC4081
Q16MA 0.1V
61
VSS
60
FCK
59
RC
58
REF OSC
57 R103
R162
VDD
820 C141 47k
56 CON0
PDTRI 0.0047
55 R104
VSS
54 47k
CON1
PD0
53
5.4V R105
VDD C174
52 CON2 47k
PD1 0.047
51
R106
PD2
47k
DT
C145 R107
0.0047 47k
CK
R108
47k
DST
R22
47k
PST
R44
47k
RESET
C144 C155
0.0047
0.0047
RESET
CON0 R93 1k
2.4V
CON1
CON2
R95 1k
DT
R4
L10 1H CK R97 1k
470
DST
PST R99 1k
Q33 12.5V
LMUN5211
7.9V
C166
W92
1
C170
0.0047
C224
0.1
*; Refer to "PARTS LIST."
1st Lo
W1A
J4 P3 P4
W103 W104
1LO MAIN
1 1
1
unit
2 2
2 J201
1LOE
EP103
EP104
CP307
CP308
CP309
CP310
CP311
CP312
CP313
CP314
CP315
CP316
R91 J3
1k
1
SRST
2 FSKK
3 CON0
R94 1k
4 CON1
5 CON2
R96 1k
6 PDAT
7 PCK
R98 1k
8 DSTB
9 PSTB
10 DNB
11 13V
12 13V
13V
13
14 8V
15 NC
GND
16 GND
CP304 CP306
CP301
CP303 CP305