Icom IC-718 Service Manual page 21

Mar. 2010
A
CHASSIS WS3
B
C
D
+
CHASSIS
M
MF1
–
3 2 1 SB0812H-ICOM-00
FAN
J3601
3 2 1
FAN+ W3601
FAN–
MAIN UNIT
RX R1 R2 R3
C5
270 18 270
82p
P5 J701
L1
100uH
L2
R3602 330k IC2101D 0.22H
R3601
NJM2058
13 C3
1k C1 6
14 –
0.1
Q3601 0.1
4 1
FANV
2SD1664 +
IC1
12
While rotating the fan: 8.4V
PC2709T 5 3 2
R5
While stopping the fan: 0V
270
R3603
+
100k
C3601 C3602
C701
10 0.1
0.1
C702
0.1
WCNT
ATT8
D3701
C3702 DAN202K
L702
3.3
CARR 100uH
R701
R3702
R3701 390
C704
470 R703
R3703 4.7k
R3704 270 0.1
1k RV-109
L701
Q3702
100uH
DTA114EE 2 3
CW ON
KEY UP: 0V Q701
1 4
KEY DOWN: 8.0V DTC114EE
Q3701
PAI D701
J1 DTC114EE
1SV312
C703
P1 KDS ATT ON: 6.6V
CP3701
0.1
ATT OFF: 0V
TX_
C3801 Q3801
0.0047
DTC114EE
L813
W7 W6
100uH
C4006
0.1
Q3802
C4007 DTA114EE
0.1
C811 C813
C4008 0.1 0.0015
Tx: 12.5V
3 2
0.1
Rx: 0V
C4009 4 1
C812 C814
0.1
0.047 0.0047
D801
J4001
1SV312
L6 R4006 4.7 L6
1 L811
L1 R4005 4.7 L1
4.7H
2
L2 R4004 4.7 L2
3
L4 R4003 4.7 L4
4
L5 R4002 4.7 L5
5
FOR FOR
6
L3 R4001 4.7 L3
7
C803
REF REF
8 0.0047
GND R4007
9
T13V 4.7 T13V
10
NOTE:
C4005
CP4002 CP4001
0.1 *LINE ON and LINE OFF
Each line is ON when the frequency
C4003
is displayed in the table below .
0.1
Display frequency
*LINE
(MHz)
name
0.03 – 1.59999 B0
1.6 – 1.99999 B1
2.0 – 3.99999 B2
4.0 – 7.99999 B3
8.0 – 10.99999 B4
11.0 – 14.99999 B5
15.0 – 21.99999 B6
22.0 – 29.99999 B7
16
BST 1 4
STR Q1
MDA 2 5
D Q2
MC 3 6 B2S
CLK Q3
DRE 7
15 B3S
OE Q4
Q5 14 B4S
Q6 13 B5S
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
14V C4105
8
0.0047 ICL
ICL
7 +
PAT8 PAT8 C3007
6
ICH 470
ICH
5
HV
4
STRT STRT
3
KEY
KEY
2
PAT
TEMP
1
R4101
1k
HV
C4106 C4107
0.0047 0.0047
T8
C109 0.1
R105
L104 R101 1k
Tx: 2.4V R102 R104 L105
100uH C108 100
C151
100k LR-358
Rx: 0V 0.1 100k
0.0047
R4 C4 MP1 Q101
C2
15 100p
3SK131
0.1
C112 C110
0.1 0.1
L101 L102 C106 L100
R106
0.27H 0.0033 0.47 H
0.22H R103 22k
L151
R6 100k
C104 R107 LS-484B
18
C107
22p 2.2k
0.0027 R108
C102
4.7k
C100
R7 47p C113
82p
270 10p
Q102
L103 C111 L106
C101 C103 C105
5.6H 3SK131 7p LS-483A
68p 150p 82p
PRE ON: 0V
L802 PRE OFF: 7.5V
C902
330H
L801 R821 R823 L821 L822 0.1
100uH 22 22 5.6H 6.8H
R802
D901
C823 470
R801
MA77
220p
C801 470 R822 C901
0.1 47 0.1
*LINE ON: 5.1V W801
C822 C824
LINE OFF: 0V
0.0027 0.0022 D903
MA77
L703 + ATT8
C821
100uH R824
R901
R704 1 *LINE ON: 5.2V
470 D806
390 D802 LINE OFF: 0V 470
MA77
1SV312
B0
R705
3 2 C837 *LINE ON: 6.4V L901
470 L832 L833 D813
LINE OFF: 0V 100uH
2.7H 3.9H 0.0027 MA77
4 1
C833
C839
270p L835 0.0015
L831 L836
4.7H
100uH 5.6H PROF
C834 C838
*LINE ON: 6.4V PRON
L814 C831 0.001 0.012
R833 R832
100uH LINE OFF: 0V 0.1
R831 C832 470 470
C840
470 0.0018
C816
0.1
0.1
B1
C815 *LINE ON: 7.6V
D803 *LINE ON: 7.5V L842 D807 L1401
0.0027 LINE OFF: 0V
MA77 LINE OFF: 0V 2.2H MA77 LR-86
C846 L843
L841
C817 150p 2.2H
D810 100uH D814
0.0047
MA77 MA77
C843
C845 C842 C844
L812 56p
560p 0.0012 680p C1401 C1402
3.3H C841
0.1 0.1
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
L851 L852
C1707
L855
0.82H C856
100uH
1.5H 10 C1608 6.3V B
C853 0.0056
L854
68p
1.8H
C851
C852 C854
R1729
C858
0.1 R851 470p 270p R852
10k
0.1 FOR
470
1k
POCV
B3 *LINE ON: 6.5V
LINE OFF: 0V
*LINE ON: 7.0V 13.1V
L863 C865 C867 D808
D804
LINE OFF: 0V
1H 680p 330p MA77
MA77
D1706
MA2S1110G
L862
L861 C866 L865
1.2H D1707
100uH 0.0027 1.2H
D811 C863 D815 MA2S1110G
MA77 56p L864 MA77
D1702
0.82H
MA8051M
C861
R862
0.1 R861 C862 C864 C868
D1701
470 330p 330p 1k 0.1
MAZ8043GH
B4
R1706
*LINE ON: 6.5V
*LINE ON: 7.0V
330
L873 C875 LINE OFF: 0V
LINE OFF: 0V
0.56H 470p
AMS
L872
B0S C877 REF
L871 0.47H L875
B1S C876 220p
100uH 0.82H
0.0015
C873
C871 56p L874 ICH
0.0047 0.68H
ICL
R871 C872 C874 R872 C878
470 270p 150p 1k 0.0047
Q1706
B5
*LINE ON: 6.5V DTC114EE
D805 *LINE ON: 7.0V L883 C885
D809
MA77 270p LINE OFF: 0V
LINE OFF: 0V 0.39H MA77
AMS
L882
C883 C887
0.39H C886
33p 150p
L885
L881 0.0012
D812 D816
0.56H
100uH
MA77 MA77
L884
C881 0.47H
0.0047
R881 C882 C884 R882 C888
470 220p 120p 1k 0.0047
B6
R3003
B0
47k
*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
220p 100p LINE OFF: 0V
L891
R3006
C896 L895
B3 100uH R2401
47k C893
C899 820p 0.39H
100k
R3007 39p
33p L894
B4
47k
0.33uH C2401
R3008 0.047
B5
47k C891 C892 C894 R892 C898
R891
R3009 0.0047 470 120p 68p 1k 0.0047
B6
47k
BEPI
R3010
B7
47k
IC3004
C3003
IC3002
BU4094BCF 0.1
16
TD62783AF
FST 1 2S3K 1
1 18 B7 Q1 4
STR .
IN1 O1 5 2STH
MDA 2 2
2 O2 17 B6 D Q2
IN2
MC 3 6 2SOP 3
3 16 B5 CLK
Q3
IN3 O3 DRE 4
15 OE 7 PRES
4 15 B4 Q4
IN4 O4
14 PROS 5
5 14 B3
Q5
IN5 O5 13 ATTS TX 6
6 13 B2
Q6
IN6 O6
Q7 12 IFS RX 7
7 12 B1
IN7 O7 Q8 11 8
8 11 B0
IN8 O8
9
9 10
VS GND QS 9
+
C3006 QS 10
C3004
470
8 0.1
PLL unit
WS1A
1 2
P4
1st Lo
J201
1 2
8V
T8
Tx: 3.5V
Rx: 0V
Tx: 3.5V
7.6V
Rx: 0V
C154
L152
0.0047
100uH
C202 C203 R202
R152
Tx: 0.8V 0.0047 0.1 15
150 C204
C157
L201
Rx: 0V C155
0.0047 0.0047
10uH
0.0047
R151 D201
100
MA77
R153 C205
R156 R203
C201
3.3k 0.0047
C152 1k 4.7k
470p
12p
R154 D202
1k MA77 R206
Q201
10 R205
2SC4673 L202
R155 332KC C156 C301
R201 56
C153 0.22H R301 0.0047 D301
0.0047 R204
1k C206
0.0047 1k
Q151 680
220p
2SK882
14V
R8V
Q1001 R13V
2SA1576 L1101
R902
LR-358
220 R1001 R1101 L1104
C1001
R1002
47k 1k 100uH
0.1
1k
R1102
D902
C1101 R1103
100
MA77 Q1103 R1107
0.0047 680
Q1002
47
2SK1740
C904
DTC114EE C1102
0.1
0.1
D904 L904
0.33uH C1104
MA77 Q1101
L902 L903
PRE ON: 11.7V 2SK1740 3p
0.18H 0.27H
PRE OFF: 0V
L1102
Q1102
LR-403
C906 C1103
2SK1740
R903 10p 0.1
R904
C905
1k C907 Q1104
C1105
10k R1105
150p 82p
2SK1740 0.1
680
PRE ON: 1.0V 8V
PRE OFF: 0V
R1404 R1403
R1507
10k 4.7 8.0V 8.0V
100
R1401
220
R1506
R1503 C1507
100 100
Q1401 Q1502 0.1
L1402 Q1501 L1501 L1502
2SK2171 LR-397 LS-450 2SK882 LS-450
2SK882
0.8V 0.8V
R1505
Q1402
470
2SK2171
R1501 R1502
C1405 + 47k C1501 470
C1502 R1504 C1504 C1505 R1508
22 0.1
R1402 C1404 0.1 22k 0.1 0.1 27k
22
0.1
Q1705
R1710
DTC114EE
Tx: 1.7V ALC
2.2M
Tx: –1.5V
Rx: 0.7V
IC1701C Rx: 7.6V 0V
R1709
C1708 NJM2058M D1704
100k R1711
IC1751A
0.1 9 DAP202K
330
–
8
NJM2904M
10
+
0V
R1703 R1708
100k 220k
C1704 3
+
0.0047
4.8V
Q1703
2
–
R1713 2SA1576
Tx: 0.5V R1751
2.2M
Tx: 5.2V 820k
Rx: 0.6V R1754
Rx: 5.7V
IC1701B 470k
D1703 R1712
NJM2058M
100k
MA2S1110G
6
–
7
R1724
5
10k
+ R1716
470
R1714 EALC
560k R1715
33k
R1707 R1725
Tx: 0.5V
100K 100k
Rx: 4.9V IC2101A
R1722
Tx: 5.6V
NJM2058
1M
Rx: 6.0V
C1701 D1705
0.1 DAP202K
R1717
47k 2 4 1
–
1
R2108
3
R1723
+ 470
IC1701A C2103
11 470
R1718
W1726 0.1
NJM2058M
47k
+
R1720
C2101
R1730 R1719 R1721
10k
1
100k 33k 33k
C1702 C1706
R2101
0.1 2.2
470
R2402
J2501
100k
MDA SST
1 2
3.9V SBS MC
IC2101B 3 4
5V SPCE
C2403
5 6
NJM2058M
0.001 GND SPCH
7 8
C2501
C2405
6 0.1
R2501
– 0.1
7
47k
R2403
5 J2602
47k +
DOUT
OPTION
1
0V R2406 R2407 W2501 DOE
C2402 2
C2502
4.7k 4.7k
0.0047 UT-102 NC
0.1 3
NC
4
IC3005
R3011–R3013
Q3101
IC3006
TD62783AF 220 C3005
DTC114EE
R3011 BU4094BCF 0.1
18 2N3K
16
IN1 O1
BEE
17 R3012 2NTH MST 1 4 AMS R3101
IN2 O2 Q1
STR.
16 2NOP MDA 2 5 AFS 4.7k
IN3 O3 D Q2
15
MC 3 6 AFMS
IN4 O4 R3013
CLK Q3 AST
14 ATT8 DRE 15 7 AGSS
IN5 O5 OE Q4 MC
13 T8V
Q5 14 AGRS
IN6 O6 MDA
12 R8V
IN7 O7 13 AGMS
Q6
11 PAT8
12 NBS
IN8 O8
Q7 9
GND 10 R3201
11 COMS
VS –
Q8 100k
8
10
QS 9
+
10 IC2101C
QS R3203
NJM2058
470
8
Display frequency (MHz) Voltage (V) Display frequency (MHz)
0.03 – 1.99999 7.4 11.0 – 14.99999
2.0 – 3.99999 6.0 15.0 – 21.99999
4.0 – 7.99999 5.0 22.0 – 29.99999
8.0 – 10.99999 0
18
P3
1LO
1
PLL unit J4
2
1LOE
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 FI301B MA77 MA77
t
FL-315 FL-315
L301 L303
D306
LS-540 LS-540
MA77
y
D305 MA77
L302
C302 LS-483A
D304
6p C304
MA77 R302
C303 C305
6p
1k
6p
0.0047
MA77
Tx: 0V
Rx: 3.6V
u
i
AGC
o
R1108 C1209
R1201
0.0047
1k 1k
R1205
1M R1208 R1209
1.5V 5.5V
C1203 100 1k
C1106 0.1
0.0047
C1205
Q1201
10p
L1103 R1202
3SK131
LS-483A L1201 5.6k L1202
LS-484B W1202 LS-484B
R1207
2.2k
C1208
10p
C1204 C1206
R1204 0.0047 R1206 0.0047
C1201 C1202 1.8k
150
C1108
0.0047 0.0047 C1207
0.1
0.0047
!0
!1
C1508
CP1501
330p
!2
R1509 Q1505 !3
R1515
L1503 3.3k 330 2SA1576
330H C1510
0.1 R1516 R1523
R1514 !4
Tx: 0V
2.2M 47k
47k
8.0V D1501 Q1504 Rx: 6.5V
1SS375
2SC4081
Q1503 D1510
0.8V MA2S1110G
2SK882
R1513
47k
+ R1518
C1509 R1510 R1511
Tx: 0V C1512 1k R1517
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
R1802 @0
R1752 2.2M
Tx: 3.2V Tx: 1.8V 4 3
2.2M
Rx: 0V 0V Rx: 2.6V
5 2
8
R1755
R1801
13 6 1
1k –
1k
1 14 R1806
R1803
12 1M
+
1.8M
4
IC1751B
D1801 IC1701D
C1752 R1805
NJM2904M 1SS375
0.1 NJM2058 100k @1
5
7
@2
6
@3
@4
@5
@6
R2202
R2105
10k
@7
47k
C2102 R2225
R2203
220
0.1
10k
@8
C2105
D2101
4 @9
IC2102
0.0022
MA2S1110G #0
2 TC4W53F
– R2201
C2206
1k
3 1 8
+ R2208 0.1
2 7
R2103 10k
11 R2102 C2201 #1
3 6
10k 10k
4 5 47 C2207
+
R2104 R2106
0.047
C2104
47k 47k
+
0.0022 #2
C2202 R2210 C2209
W2101 #3
C2107
R2107
0.1 4.7k 1
0.1
47k
#4
#5
#6
J2603 DRE
R2601 1k #7
10
R2704
R2602 1k DIN
9
100k #8
R2603 1k DSS
8
R2703
OPTION R2604 1k MDA #9
7 100k
R2605 1k MC $0
6 R2701
UT-106 5 4.7k
R2606 1k DSP
4
C2702
3
C2601 C2602 330p
2
$1
0.1 3.3
1
P2601
J2601
W2601 +
DOUT DOUT DOUT R2702
1 1
470
DOE
2 DOE 2 DOE
R2607
NC W2602
100k
3 + C2701
NC
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
AO11
R3102 13 AO9 8 FANV
AO12
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
BANV 19 AO3 2 POCV
AO2
20 1
GND VSS
C3302
C3301
0.1
0.1
IC3301
R3202
M62352GP
100k
BAND
$7
$8
$9
*; Refer to "PARTS LIST."
Voltage (V)
4.0
3.1
2.2