Icom IC-718 Service Manual Addendum page 99

Jul. 2009
VOLTAGE DIAGRAM
L8
10H
5V
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
0.0047
2k
R28
1k R29
2k
R30
1k
R31
12 44
VSS
2k VDD
13
43 CK
DA0 CON_CLK
14 DT
42
DA1 DATA
R32
15 41 PST
1k DA2 STRB
R33
16 40
2k DA3 VSS
17 IC2 39
DA4 VDD
18 38
VSS SC-1287A P2
19
37 C29
R34 DA5 TREE
(TC190G02EFG-0058)
R35 20 0.0047
1k 36
2k DA6 P1
21 35
DA7 UL
22 34
DA8 VSS
R36
R37
1k
2k
C30
0.0047
R38
1k
R39
2k
C31 C32
R40
0.0047 0.0047
1k R41
2k
R42
1k L12
R43
ELJPA 100KF 10U
2k
4.6V
C33 C34
100 0.0047
BFO
WS2 CP201
R52 C55 L15 L14
P5 J2
680 0.0047 15H 12H
MAIN BFO
1 1
unit
2 2
J2001
BFOE
R53 R51
C53 C51
3.9k 3.9k C54 C52
22p 0.5p 27p 2p
CP202
W10
13V
L2 C12
10H
0.0047
R12
7.9V
15k
X1
L3 CR-337 1.7V Q9
LW-25A
2SC2714
1.1V
C13
0.0047
C15
33p C14
82p
C21
R14
C16 100
R13
4.7k
TZBX4R200BA110T00 20p 470
C25
120p
C23
0.5p
2nd Lo
WS1B L7 L6
LS-471A LS-471A
P2 P1 J1
W101 W102 L49 0.12H L50 0.12H
2LO 2LO
MAIN 1 1
1
unit
2LOE C24
2 2 2
J401
15p
2LOE
EP101
C227
56p
EP102
7.9V 3.2V
8V
R191 180
3.9V
C194
L25 Q34 L26
R57 470p W7
10H LW-25A
1k 2SC4081 R
C68 R192 C5 C195
0.001 1k 33 470p
C1
100
C165 1.0V
TZBX4R200BA110T
C62 C63 L19
20p
100p 0.0047 E544GN-110248
Q18
2SK508
C67
100p
C65 R74 L38
1p 8.2k 1H
L27 2.4V 7.9V
D4
LW-25A KV1470 C64 R49 2.2V
0.0047 220
R2
100
Q26
1.4V
2SC2714
C2
C168 10
0.047
R75 C103 R78
3.9k 0.0047 100
R3
2.2k D15
1SS226
CP2 CP20
R6
10k
1.9V
W9 LFO
CP30
C228
CP1 2.2 CP3
8V
5V
0V
R180
2.2k
Q35
D16
R182
2SC4081R
33k
MA2S111
C222 R183
R181
C223
0.0047 4.7k
0.6V 15k
0.1
L47
10H
8V
C203
0.0047
C50
22p
L4
LS-472C
L5
C157
10H 39p
C17
R15
0.0047
100 R16
22k
7.2V
R121 C132
1.9V 220 100p
Q10
C18 R17
C20 100p 220 4.8V
2SC2714
15p
1.4V
5V
R23
10k
C22 C19 R18
0.0047 0.0047 220
C10
0.1
18
8V
C112
56p
L30
10H
C106 C109 L32
0.0047 0.0047 0.82H
7.8V L34
0.1H
R85 C108
R169
8.2k 0.0047
33
Q28
2SC2714
R156
R171 R172
180
W1
180 180
C111 1.3V
0.001 R84
1.9V
3.3k
R87
C104
L41
100
0.0047
10H
C129
0.0047
R7
R88 R158
220
R90
100 100 L42
470
0.82H
C118 6.8V
7.8V
C160
0.0047
0.0047
1.8V 7.0V
L39 R159
Q29
R89 10k R117
0.82H
C119 470
2SC2714 C159 47k
0.001 0.5V
0.001
Q32 Q30
R10 2SC2714
2.5V 2SC2714
22k 2.9V
R8
R160 C127 0.5V
220
10k R161 0.001
R9 C120
220
R118 C128
22k 0.0047 2.2V
47 0.0047
4.6V
L1
10H
C3
R132 C6
0.0047
2k 10
C143
R155 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 4
2k
VDD
1k
5
VSS
6
DA0
7
DA1
R147
R137 8
2k
DA2
1k
9
DA3
10
VSS
11
R148 DA4
R138 12
2k
DA5
1k 13
IC6
DA6
14
DA7 SC-1246A
15
R149 VSS
R139 16
2k
VSS
1k
17
DA8
18
DA9
19
R150 DA10
R140 20
2k
DA11
1k
21
VDD
22
TE1
C150 23
R151 TE2
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
2k C172
27p
C188 C191
2.3V 0.1 0.0047
R166
1M
IC7
L46 L45 L44 TC4SU69F
C158
18H 22H 27H
0.001
1 5
2.4V
2
L9 1H
C156 C136 C135
3
4
22p 12p 4p
R164
C138 C137 C134 R165
1k
56p 68p 56p 1M
C167
C161 R5
0.0047
100
0.047
LFO
13V
8V
C4 C66
10 0.0047
IC1 TA7805F 10.3V
R102
22
13V
O I
G
C8 C7
C9
10 0.1
10
C114 L36 L37 J4
39p 0.1H 82nH
1
2
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
D12
ETCO2
72 1SS184
VSS
71
ETCO3
70
ETCO4
69
VSS
68
ETCO5
C146
67 R127
ETCO6 0.0047
2.2k
66
ETCO7
65
VSS
64
VDD
W170
63 C147 Q12
Q4MA
0.0047
62 2SC4081
Q16MA 0.1V
61
VSS
60
FCK
59
RC
58
REF OSC
57
R162 R103
VDD
C141
56 820 CON0 47k
PDTRI 0.0047
55
R104
VSS
47k
54 CON1
PD0
53 5.4V R105
VDD
C174
52 47k
CON2
PD1 0.047
51
R106
PD2
DT 47k
C145
R107
0.0047 47k
CK
R108
47k
DST
R22
PST 47k
R44
47k
RESET
C144 C155
0.0047
0.0047
R91
1k
RESET
CON0 R93 1k
CON1
CON2 R95 1k
DT
R4
CK
L10 1H R97 1k
470
DST
PST R99 1k
Q33
12.5V
DTC114EU
7.9V
C166
W92
1
C170
0.0047
C224
0.1
*; Refer to "PARTS LIST."
1st Lo
W1A
P3 P4
W103 W104
1LO
1 1 MAIN
unit
2 2 J201
1LOE
EP103
EP104
CP307
CP308
CP309
CP310
CP311
CP312
CP313
CP314
CP315
CP316
J3
1 SRST
2 FSKK
3 CON0
R94 1k
4 CON1
5 CON2
R96 1k
6 PDAT
7 PCK
R98 1k
8 DSTB
9 PSTB
DNB
10
11 13V
12 13V
13 13V
14 8V
15 NC
GND
GND
16
CP301 CP304 CP306
CP303 CP305