Icom IC-718 Service Manual Addendum page 146

+
CHASSIS
M
MF1
–
3 2 1 SB0812H-ICOM-00
FAN
J3601
3 2 1
FAN+ FAN– W3601
RX R1 R3
R2 C5
270
18 270
82p
P5 J701
A
L2
R3602 330k IC2101D 0.22H
CHASSIS WS3
R3601
NJM2058
13
C1
1k 14 –
Q3601 0.1
4
FANV
2SD1664 +
IC1
12
While rotating the fan: 8.4V PC2709T
While stopping the fan: 0V
R3603
+
100k
C3601 C3602
C701
10 0.1
0.1
C702
WCNT 0.1
ATT8
D3701
DAN202K
C3702
L702
3.3
100H
CARR
R701
R3702
R3701 390
470
4.7k
R3704 R3703
RV-109
1k
Q3702 L701
100H
DTA114EE
2
CW ON
Q701
KEY UP: 0V
1
KEY DOWN: 8.0V DTC114EE
Q3701
PAI
J1 DTC114EE
C703
P1 KDS ATT ON: 6.6V
CP3701
0.1
ATT OFF: 0V
TX_
C3801 Q3801
0.0047
DTC114EE
W7 W6
C4006
0.1
Q3802
C4007 DTA114EE
0.1
C811
C4008 0.1
Tx: 12.5V
3 2
0.1
Rx: 0V
C4009 4 1
C812
0.1
0.047
D801
J4001
1SV312
L6 R4006 4.7 L6
1
L1
L1 R4005 4.7
2
R4004 4.7 L2
L2
3
L4 R4003 4.7 L4
4
L5 R4002 4.7 L5
B 5
FOR FOR
6
L3 R4001 4.7 L3
7
C803
REF REF
8 0.0047
GND R4007
9
4.7 T13V
T13V
10
NOTE:
C4005
0.1 CP4002 CP4001 *LINE ON and LINE OFF
Each line is ON when the frequency
C4003
is displayed in the table below .
0.1
Display frequency
(MHz)
0.03 – 1.59999
C 1.6 – 1.99999
2.0 – 3.99999
4.0 – 7.99999
8.0 – 10.99999
11.0 – 14.99999
15.0 – 21.99999
22.0 – 29.99999
16
BST 1 4
Q1
STR
MDA 2 5
D Q2
MC 3 6
CLK Q3
DRE 15 7
Q4
OE
Q5 14
Q6 13
Q7 12 B6S
Q8 11 B7S
9
QS
10
QS
IC3001
8 C3001
BU4094BCF
0.1
R3001
47k
D3001
DAN202K
R3002
47k
D3002
DAN202K
C3002
0.1
C4104
0.0047
C4103
0.0047
J4101 C4102
GND 0.0047
16
GND
15 C4101
GND R4102
0.0047
14
100
PWS POWS
13
14V 14V
12
14V IC3003
11
14V TD62783AF
10
14V
9
C4105
14V
D 8
ICL 0.0047 ICL
7 +
C3007
PAT8 PAT8
6
ICH ICH 470
5
HV
4
STRT STRT
3
KEY KEY
2
TEMP PAT
1
R4101
HV 1k
C4106 C4107
0.0047 0.0047
T8
C109 0.1
L104
R101
Tx: 2.4V R102 R104 L105
100H C108 100
100k 100k LR-358
Rx: 0V 0.1
L1
R4 C4 MP1 Q101
100H C2
15 100p
3SK131
0.1
C112 C110
0.1
L102 C106 L100 0.1
L101 R106
C3 0.0033 0.47 H
6 0.22H 0.27H R103 22k
0.1
R6 100k
1 R107
18 C104
C107
2.2k
22p
0.0027 R108
5 3 2 C102
4.7k
R5 C100
47p C113
R7
270 82p
10p
270
Q102
L103 C111 L106
C101 C103 C105
5.6H 3SK131 7p LS-483A
68p 150p 82p
PRE ON: 0V
L802 PRE OFF: 7.5V
330H
L801 R821 R823 L821 L822
100H 22 22 5.6H 6.8H
R802
C823
R801 470
220p
C801 R822 C901
R703 C704 470
0.1
270 0.1 0.1 47 W801
*LINE ON: 5.1V
C824
C822
LINE OFF: 0V
0.0027 0.0022
3 L703 + ATT8
C821
100H R824
R704 1 *LINE ON: 5.2V
4 470 D806
390 D802 LINE OFF: 0V
MA77
1SV312
B0
R705
D701
3 2 *LINE ON: 6.4V
470 L832 L833 C837 D813
1SV312
3.9H 0.0027 LINE OFF: 0V
2.7H MA77
4 1
C833
C839
270p L835
L831 0.0015 L836
4.7H
100H 5.6H PROF
C834 C838
*LINE ON: 6.4V
PRON
L813 L814 C831 0.001 0.012
R833 R832
LINE OFF: 0V
100H 100H 0.1
470 470
R831 C832
C840
470 0.0018
C816
0.1
0.1
B1
C813 C815 *LINE ON: 7.6V
D803 *LINE ON: 7.5V L842 D807
0.0027
0.0015 MA77 2.2H LINE OFF: 0V
LINE OFF: 0V MA77
C846 L843
L841 2.2H
C814 C817 150p
100H
0.0047 0.0047 D810 D814
MA77 MA77
C843
C845 C842 C844
L811 L812 56p
560p 0.0012 680p
4.7H 3.3H C841
0.1
R841 R842
470 470
*LINE ON: 6.6V
B2
LINE OFF: 0V
*LINE ON: 7.0V
C857
L853 C855
LINE OFF: 0V
1.2H 0.0012 680p
L852
L851
L855
0.82H C856
100H
C853 0.0056 1.5H
L854
68p
1.8H
C851
C852 C854
C858
0.1 R851
470p 270p R852
0.1 FOR
470 1k
POCV
*LINE B3 *LINE ON: 6.5V
name LINE OFF: 0V
*LINE ON: 7.0V
L863 C865 C867 D808
D804
B0 LINE OFF: 0V
1H 680p 330p MA77
MA77
B1
L862
L861 C866 L865
B2
1.2H
100H 0.0027 1.2H
D811 C863 D815
B3
MA77 MA77
56p L864
B4 0.82H
C861
B5 0.1 R861 C862 C864 R862 C868
470 330p 330p 1k 0.1
B6
B4
B7
*LINE ON: 6.5V
*LINE ON: 7.0V
L873 C875 LINE OFF: 0V
LINE OFF: 0V
0.56H 470p
L872
B0S C877 REF
L871 L875
B1S 0.47H C876 220p
100H 0.82H
0.0015
B2S
C873
B3S
C871 L874
56p ICH
B4S
0.0047
0.68H
B5S
ICL
R871 C872 C874 R872 C878
470 270p 150p 1k 0.0047
B5
D805 *LINE ON: 6.5V
*LINE ON: 7.0V L883 C885 D809
MA77 0.39H 270p LINE OFF: 0V MA77
LINE OFF: 0V
L882
C883 C887
0.39H C886
33p 150p
L885
L881 0.0012
D812 D816
0.56H
100H
MA77 MA77
L884
C881
0.47H
0.0047
R881 C882 C884 R882 C888
470 220p 120p 1k 0.0047
B6
R3003
47k B0
*LINE ON: 7.0V
R3004
LINE OFF: 0V
B1
47k
R3005 L892
L893 C895 C897 *LINE ON: 6.5V
B2
47k 0.27H 0.27H 100p
220p LINE OFF: 0V
L891
R3006
C896 L895
B3 100H
47k C893
C899 820p 0.39H
R3007 39p
33p L894
B4
47k
0.33H
R3008
B5
47k
C891 R891 C892 C894 R892 C898
R3009 0.0047 470 120p 68p 1k 0.0047
47k B6
R3010
B7
47k
IC3004
IC3002 C3003
BU4094BCF 0.1
16
TD62783AF
FST 1 2S3K
1 18 B7 Q1 4
STR .
IN1 O1
MDA 2 5 2STH
2 O2 17 B6 D
Q2
IN2 MC
3 16 B5 3 CLK 6 2SOP
Q3
IN3 O3
DRE 15 OE 7 PRES
4 15 B4
Q4
IN4 O4 14 PROS
5 14 B3
Q5
IN5 O5
13 ATTS
6 13 B2
Q6
IN6 O6 Q7 12 IFS
7 12 B1
IN7 O7
Q8 11
8 11 B0
IN8 O8
9 10
VS GND QS 9
+
QS 10
C3006
470
8
J201
8V
T8
Tx: 3.5V
Rx: 0V
R105 Tx: 3.5V
7.6V
1k Rx: 0V
C154
C151
L152
0.0047
0.0047 100H C202
C203 R202
R152
Tx: 0.8V 0.0047 0.1 15
150 C204
C157
L201
Rx: 0V C155
0.0047 0.0047
10H
0.0047
R151
D201
100
MA77
L151 R153
R203 C205
R156 C201
3.3k
LS-484B C152 0.0047
1k 470p 4.7k
12p
R154
D202
R206
1k MA77 Q201
10 R205
2SC4673
L202
R155 332KC C156 56
R201
C153 R204 0.22H
0.0047
1k C206
0.0047 Q151
680
220p
2SK882
14V
R8V
Q1001 R13V
2SA1576 L1101
C902 R902
LR-358
0.1 220 R1101 L1104
R1001 C1001
R1002 1k 100H
47k 0.1
1k
D901 D902 R1102
C1101 R1103
MA77 100 Q1103
MA77
0.0047 680
Q1002
2SK1740
C904
DTC114EE C1102
0.1
0.1
D903 D904 L904
MA77 MA77 0.33H Q1101
L903
L902
PRE ON: 11.7V 2SK1740
R901
0.18H 0.27H
470 PRE OFF: 0V
L1102
Q1102
LR-403
C906 C1103
2SK1740
L901
R903 10p
0.1
R904
100H 1k C905 C907 Q1104
10k R1105
150p 82p
2SK1740
680
8V
PRE ON: 1.0V
PRE OFF: 0V
R1404 R1403
8.0V 8.0V
10k 4.7
R1401
220
R1506
R1503
100 100
Q1401 Q1502
L1401 L1402 Q1501 L1501
LR-86 2SK2171 LR-397 LS-450
2SK882 2SK882
0.8V 0.8V
R1505
Q1402
470
2SK2171
C1401 C1402 R1502
R1501
C1501 470
0.1 0.1 C1405 + 47k
C1502 R1504 C1504
22 0.1
0.1 22k 0.1
R1402 C1404
22 0.1
Q1705
R1710
DTC114EE
ALC
Tx: 1.7V
C1707 2.2M
Tx: –1.5V
0.1 Rx: 0.7V
IC1701C Rx: 7.6V 0V
R1709 NJM2058M
R1729 C1708 D1704
100k R1711 IC1751A
10k 0.1 9 DAP202K
– 330
8
NJM2904M
10
+
0V
R1703 R1708
13.1V
100k 220k
C1704
0.0047
4.8V
D1706 Q1703
MA2S111
R1713 2SA1576
R1751
Tx: 0.5V 2.2M
D1707 820k
Rx: 0.6V Tx: 5.2V
MA2S111
Rx: 5.7V
IC1701B
D1702 D1703 R1712
NJM2058M
MA8051M MA2S111 100k
6
–
7 R1724
D1701
5
+ R1716 10k
MA8043H
R1707
R1714 470
100k EALC
R1706
560k R1715
330
33k
R1725
Tx: 0.5V
100k
Rx: 4.9V
AMS
R1722
Tx: 5.6V
1M
Rx: 6.0V
C1701 D1705
DAP202K
0.1
R1717
47k 2 4
–
1
3
R1723
+
11 IC1701A
470
R1718
W1726
Q1706 NJM2058M
47k
R1720
DTC114EE
R1730 R1719
R1721
10k
100k 33k 33k
C1702
C1706
AMS
0.1 2.2
R2402
J2501
100k
MDA SST
1 2
SBS
3.9V MC
3 4
IC2101B
5V SPCE
C2403 5 6
NJM2058M GND SPCH
0.001
7 8
C2501
C2405
6 0.1 R2501
– 0.1
7
47k
R2401 R2403
5
+
100k 47k
OPTION
0V R2406 R2407 W2501
C2401 C2402
4.7k 4.7k C2502
0.0047 UT-102
0.047
0.1
BEPI
IC3005
R3011–R3013
Q3101
IC3006
220 C3005
TD62783AF
DTC114EE
R3011 BU4094BCF 0.1
1 18 2N3K
16
IN1 O1
BEE
2 17 R3012 2NTH MST 1 4 AMS
IN2 O2 STR. Q1
3 16 2NOP MDA 2 5 AFS
IN3 O3 D Q2
4 15 MC 3 6 AFMS
R3013
IN4 O4 CLK Q3 AST
5 14 ATT8
DRE 15 7 AGSS
IN5 O5 MC
OE Q4
TX 6 13 T8V
IN6 O6 Q5 14 AGRS
MDA
7 12 R8V
RX 13 AGMS
IN7 O7
Q6
8 11 PAT8
12 NBS
IN8 O8
Q7 R3201
9 GND 10
VS 11 COMS
Q8 100k
QS 9
C3004
10 IC2101C
0.1 QS
R3203
NJM2058
470
8
Display frequency (MHz) Voltage (V) Display frequency (MHz)
0.03 – 1.99999 7.4
2.0 – 3.99999 6.0
4.0 – 7.99999 5.0
8.0 – 10.99999 0
22
PLL unit
WS1A
P3
1LO
1
PLL unit J4
2
1LOE
1 2
P4
1st Lo
1 2 q
w
e
r
t
L153
Tx: 2.6V
C306
4.7H C158
Rx: 0V
0.0047 0.0047
Tx: 0V R303
Rx: 3.5V 1k
Tx: 6.3V
D302 D303
Rx: 0V
FI301A MA77 MA77
FI301B
t
FL-315 FL-315
L301 L303
D306
LS-540 LS-540 MA77
y
L302 D305 MA77
C302 LS-483A
D304
6p C304
R302
MA77
C303 6p C305
1k
C301 6p 0.0047
R301 0.0047 D301
1k MA77
Tx: 0V
Rx: 3.6V
u
i
AGC
o
C1209
R1108 R1201
1k 1k 0.0047
R1205
R1208 R1209
1M
1.5V 5.5V
100
C1203 1k
0.1
C1106
R1107
0.0047
47 C1205
Q1201
R1202 10p
L1103
3SK131
5.6k L1202
LS-483A L1201
LS-484B
LS-484B W1202
C1104 R1207
3p 2.2k
C1208
10p
C1204 C1206
R1204 0.0047 R1206 0.0047
C1201 C1202
1.8k 150
C1105 C1108
0.0047 0.0047 C1207
0.1 0.1
0.0047
!0
!1
R1507 C1508
CP1501
100 330p
!2
R1509 Q1505 !3
C1507 R1515
L1503 3.3k 330 2SA1576
0.1
L1502
330H C1510
LS-450
0.1 R1516 R1523
R1514 !4
2.2M Tx: 0V
47k
47k
8.0V Q1504
D1501 Rx: 6.5V
1SS375 2SC4081
Q1503 D1510
0.8V 2SK882 MA2S111
R1513
47k
+ R1518
C1505 R1508 C1509 R1510 R1511
C1512
Tx: 0V 1k R1517
0.1 27k 0.1 470 100k
C1511
1
Rx: 7.3V
3.9k
470p
NBLV
!5
!6
!7
!8
!9
C1801
R1804 Q1801
0.0047
C1751
220k
UMD6
0.1
@0
R1802
R1752 2.2M
Tx: 3.2V Tx: 1.8V 4 3
2.2M
Rx: 0V 0V Rx: 2.6V
5 2
8
R1755
3 R1801 13 6 1
+ 1k –
1k
1 14 R1806
R1803
2 12 1M
– +
1.8M
4
IC1751B
IC1701D
D1801
C1752 R1805
R1754
NJM2904M 1SS375
0.1 NJM2058 100k @1
470k
5
7
@2
6
@3
@4
@5
@6
R2202
R2105
10k
@7
47k
C2102 R2225
IC2101A
R2203
0.1 220
NJM2058 10k
@8
C2105
4 D2101 @9
IC2102
0.0022
MA2S111 #0
2
TC4W53F R2201
–
1
C2206
1k
3 1 8
R2108 R2208 0.1
+
2 7
10k
470 R2102 R2103
C2103 11 3 6 C2201 #1
10k 10k
0.1 4 5 47
C2207
+
+ R2104
R2106 0.047
C2104
C2101
47k 47k
0.0022 +
1 #2
R2101
W2101 C2202 R2210 C2209
#3
C2107 R2107
470 0.1 4.7k 1
0.1
47k
#4
#5
#6
J2603
R2601 1k DRE #7
10
R2602 DIN R2704
1k
9
100k
R2603 1k DSS #8
8 R2703
R2604 1k MDA #9
OPTION
7 100k
$0
R2605 1k MC
6
R2701
UT-106 5 4.7k
R2606 1k DSP
4
C2702
3
C2601 C2602 330p
2
$1
0.1 3.3
1
P2601
J2602 J2601
W2601 +
R2702
DOUT DOUT DOUT DOUT
1 1 1
470
DOE DOE
2 2 2
DOE DOE R2607
NC NC W2602
100k
3 3 + C2701
NC NC
4 4
10
14V
$2
8V
$3
5V $4
T8V $5
R8V $6
R3302 R3303
330 560
11 10
C3101
VCC VDD
12 AO10 9
0.1
R3101 AO11
R3102 13 AO9 8 FANV
AO12
4.7k
4.7k 14 7 NBLV
DO AO8
15 6
LD AO7
16 5 MIGV
CLK AO6
17 4 RFGV
DI AO5
BEPV 18 AO4 3 AFGV
AO1
9 BANV 19 AO3 2 POCV
AO2
20 1
–
8 GND VSS C3302
10
C3301
0.1
+ 0.1
IC3301
R3202
M62352GP
100k
BAND
$7
$8
$9
Voltage (V)
11.0 – 14.99999 4.0
15.0 – 21.99999 3.1
22.0 – 29.99999 2.2