![background image](http://html.mh-extra.com/html/icom/ic-718/ic-718_service-manual-addendum_612206147.webp)
23
PLL unit
WS2
R604
4.7k
R605
4.7k
R614
10k
D601
DAP202K
R611
10k
D605
DAP202K
FI611
FL-65
WCNT
2nd Lo
C502
0.0047
Q501
DTC114EE
D502
MA2S111
R602
33k
1 2
J401
Q503
DTC114EE
Q511
DTC114EE
R511
2.2k
C503
0.47
C511
100
8V
5V
T8V
WCNT
ALC
R512
4.7k
R513
33k
R514
33k
R2312
4.7k
R505
22k
2LO
2LOE
R403
270
R401
270
R402
18
PLL unit
WS1B
C1301
0.1
D401
HSB88WS
R304
1k
C307
0.0047
R1301
1k
1
2
3 4 5
FI1301
CFWS455HT
L1301
LS-468
R8V
L401
LR-358
C401
470p
L402
LR-395
R502
1k
C506
47
C507
0.1
R504
100
R507
4.7k
R508
103KCT
R603
33k
C1305
0.1
L1303
LS-468
C1307
0.1
R1304
4.7k
C1308
0.1
R1305
1.8k
C1310
0.1
R1308
220
Q1301
3SK131
L1304
330H
R1306
470k
C1309
0.1
W1311
R1307
6.8k
R1310
2.2k
R1311
2.2k
D501
DAN202K
R1302
220
Q502
2SK882
R509
10k
D503
DAN202K
D1301
MA77
D1302
MA77
L1302
LS-468
R1300
100k
L501
LS-469
R503
47k
R501
1k
C504
0.0047
C509
0.0047
C508
0.1
C501
0.0047
C510
1
14V
R506
10k
R633
1k
C631
0.1
C601
0.1
R612
5.6k
C611
0.1
C612
0.1
R613
100
D606
DAN202K
D602
DAN202K
R621
3.3k
R624
3.3k
R622
5.6k
C621
0.1
R623
100
C622
0.1
D603
DAP202K
D604
DAN202K
C602
0.1
R631
10k
R632
5.6k
C632
0.1
R634
100
C633
0.1
R635
10k
D607
DAP202K
D608
DAN202K
C603
0.1
R510
10k
R601
10k
R606
10k
2NTH
2NOP
2N3K
14V
R8V
8V
CP1621
CP1622
BFO
R2004
220
R2006
330
R2005
470
BFO
BFOE
BFO
BFOE
1
2
1
2
J2001
P5
PLL unit
J2
Q1603
3SK131
R1622
2.2k
R1623
560
R1624
470
R1625
470k
R1626
220k
C1625
0.1
C1631
0.1
D1631
DAN202K
D1632
MA77
C1632
0.1
C2010
0.1
L2001
100H
C2009
10
C2008
0.1
C2007
0.1
C2006
0.0047
C2004
0.1
C2003
0.1
C2002
100p
R2001
100
C2001
0.1
C1905
0.0047
D1901
1SS375
R1907
1k
C1904
0.1
C1903
0.0047
L1621
LS-450
R1631
10k
R1632
10k
R1633
100k
R2002
22k
C1623
0.1
C1624
0.1
R2003
100
IFOUT
1
VCC
2
OSCIN 3
BASE 4
BASE
5
BASE
6
GND
7
COLECT
8
IC2001
TA4101F
C2005
1
SSBAF
SSBAF
8V
5V
ALC
14V
8V
8V
8V
AMS
5V
5V
5V
14V
14V
14V
AG
C
R1906
56k
R1905
100k
R1810
1M
R1814
1k
C1514
0.1
D1503
MA2S111
Q1509
DTA114EE
C1516
0.1
R1522
220
C1601
0.1
R1601
47
R1603
27k
Q1601
2SC4081
R1602
470
R1604
47k
C1602
0.001
C1611
0.1
R1611
100
R1615
10k
R1610
10k
R1614
4.7k
R1612
332KCT
R1617
332KC
R1627
332KC
R1610
2.2k
C1613
0.1
C1615
2.2
R1621
100
C1621
0.1
C1902
0.0047
R1902
47k
R1903
1k
C1815
150p
D1803
1SS375
C1813
0.0047
C1812
100p
Q1805
2SC4081
R1815
22k
C1803
1
C1804
0.1
R1808
15k
R1809
100
Q1602
2SK882
Q1611
2SC4081
L1611
LS-450
R1813
3.3k
D1802
MA2S111
R1812
15k
AMAF
DN
8V
R1904
47
R1901
10k
6
5
4
3
2
1
Q1803
UMD6
AG
C
A
GMS
A
GSS
C1805
0.47
C1901
3.3
R1521
1k
C1515
0.1
L1601
LS-450
C1513
47
Q1508
2SC4081
R1520
6.8k
R1807
10k
C1802
2.2
NBS
6
5
4
3
2
1
Q1802
UMD6
R1519
100
Q1506
DTC114EE
Q1507
2SC4081
VCC2
1
IN+
2
IN–
3
OUT
4
VCAIN 7
CTL
8
VCAOUT
9
VCC
10
GND
5
NC 6
IC2701
M5282FP
R2204
100k
C2203
0.1
C2205
100p
R2209
100k
C2208
470p
R2211
82k
C2210
470p
W2201
C2704
10
C2705
10
C2204
1
R2206
180k
C1814
10
NC
1
CMPI
2
CMPO
3
SWI 4
BU1I 5
BU1O 6
SWO
7
VCAI
8
VCAO
9
VCAC
10
SWC
11
VCC
12
NC
13
AVI
14
AVO
15
MUTE
16
VOXO
17
VOXI
18
BU2O
19
BU2I
20
AMPO
21
AMP–
22
AMP+
23
GND
24
IC2201
PC5023
C2211
10
R2212
220k
R2213
220k
C2212
10
R2214
4.7k
R2215
10k
R2217
47k
C2214
0.1
R2220
220k
R2221
22k
R2218
10k
C2216
0.1
D2202
DA221
C2217
0.039
R2222
6.8k
R2219
56
R2707
100
R2708
27k
C2801
0.1
5 4
3
2
1
IC2801
TC4S66F
R2804
10k
D2201
DA221
C2213
0.1
C2219
0.47
R2224
4.7k
R2383
22k
R2381
100k
C2381
10
R2382
470k
C2382
0.1
C2380
0.1
R2384
1k
AFGV
AAFO
R2223
6.8k
W2351
R2720
10k
C2720
0.1
C2721
100
C2723
47
PHOE
PHO
NC
1
VCC
2
NC
3
VIN
4
RIPPLE
5
NF 6
PHASE
7
PREGND
8
PWGND
9
POUT
10
IC2702
TA7368F
SPS
AFMS
D2701
DAP202K
R2722
47k
5
6
7
IC2351B
NJM2904M
R2216
47k
C2215
1
C2710
2.2
L2901
LR-270
C2904
0.1
R2306
330
C2304
10
R2320
8.2k
R2007
2.2k
R2008
2.2k
C2305
10
R2301
1k
R2317
1k
L2301
100H
C2303
0.1
R2352
56k
C2352
0.0022
R2353 47k
C2353
390P
D2381
1SS375
R2385
10k
C2383
10
Q2381
2SC4081R
8V
CARR
C2384
1
R2386
10k
R2387
10k
Q2384
DTC114EE
Q2383
DTC114EE
C2905
1000
3
2
1
4
8
IC2351A
NJM2904M
C2354
10
R2307
4.7k
C2312
0.47
R2300
560
R2303
4.7k
R2302
47k
R2304
47k
C2306
0.1
C2301
0.1
C2313
0.1
R2319
560
R2318
560
R2305
1k
D2301
MA2S111
D4220 MA2S728
C2315
0.47
R2803
10k
R2903
3.3
EXT SP
J4501
P1
C2314
0.1
Q2302
DTC114EE
R2321
220k
R2310
1k
C2310
0.1
C2309
0.1
R2313
10k
T8V
T8V
T8V
–5V
–5V
–5V
SPE
ESPO
SPE
ESPO
1
2
1
2
J4502
SPO
SPE
AMS
AMS
VS+
1
VCS
2
VCS
3
VS–
4
BIAS
5
VO+
6
NC
7
VC+
8
NC
9
VC– 10
NC
11
VO– 12
NC
13
V– 14
IC2301
NJM1496V
ALC
ALC
ALC
GND
SEND
SEND
MOD
GND
AFO
SQLS
13.8V
8V
BAND
FSKK
ACC
BDT
KEY
J4801
W4801
W4802
W4803
L4651 HF50ACC322513-B
L4501 HF50ACC322513-B
L4653 HF50ACC322513-B
L4654 HF50ACC322513-B
L4656 10H
L4657 10H
C4660
0.0047
L4652 10H
C4656
0.0047
C4501
0.0047
C4502
0.001
L4660 10H
C4648
0.0047
C4659
0.0047
L4801
100H
EP4801
L4802
HF50ACC322513-B
2
12
7
3
4
11
1
1
2
3
4
5
6
7
8
10
11
12
9
13
13
10
6
9
5
8
J4651
SP1
L4661 100H
L4658 100H
L4659 10H
RL4801
AHY103
C4801
0.0047
C4661
0.0047
C2903
0.1
C2902
10
1
2
3
4
5
IC2901
LA4425A
C2906
470
R2901
470
R2902
4.7
C2907
0.1
C3512
47
C4651
0.0047
8V
SEND
AAFO
AMOD
SQLS
FSK
BAND
EALC
STRT
KEY
C4653
0.0047
C4654
0.0047
C4655
0.0047
SNDS
SNDS
Q4601
2SD1619T
R4227
10k
C4662
0.0047
GND
1
TRG
2
OUT 3
RESET
4
VCONT
5
VTH
6 DISCHARGE
7
VCC
8
IC3501
PC1555G2
C3507
47
R2709
2.2k
C2708
10
C2709
10
R2710
8.2k
R2805
1k
C3511
0.1
C3509
0.1
C3508
47
D3503
MA8051
R3506
100
R3505
100
D3502
DA221
R3503
10k
R3504
100k
C3504
0.1
C3510
10
MICE
MIC
SEND
SQLS
SQLS
SPS
KEY
KEY
PHOE
PHO
FSK
L3502
1M
W4401
C2901
0.047
C3505
0.0047
C3506
0.1
R2721
560
C2722
47
MP25
C2703
10
C2706
10
R2705
4.7k
R2706
4.7k
C3503
22
C3502
0.1
C3501
47
IC3401
TA7808S
C3401
100
C3404
100
L3501
1M
C3513
0.1
C3403
0.1
C3402
0.1
R3501
180
R3502
180
R8V
R8V
MAIN UNIT
C4202 47p
C4203 47p
C4204 47p
C4205 47p
C4201 47p
C4206 47p
C4207 47p
C4208 47p
C4209 47p
C4210 47p
C4211 0.0047
C4212 0.0047
C4213 0.0047
R4201 1k
R4202 1k
R4203 1k
R4204 1k
R4205 1k
R4206 1k
R4207 1k
R4208 1k
R4209 1k
R4210 1k
R4211 1k
R4213 1k
R4214 1k
R4217 1k
R4218 1k
R4219 1k
R4220 1k
J4201
to
LOGIC
unit
J7
to
LOGIC
unit
J6
POWS
C4200
0.0047
HV
W4216
R4215 1k
R4221 1k
R4222 1k
R4223 1k
R4225 1k
R4226 1k
C4214 0.0047
C4216 0.0047
C4220 0.1
C4222 0.0047
C4224 0.0047
C4226 0.0047
C4227 0.1
C4215 0.0047
C4219 0.0047
C4221 0.0047
C4223 0.0047
C4218 0.0047
C4217 0.0047
C4225 0.0047
C4401
0.0047
C4402
0.0047
C5001
0.001
J4401
STRT
R4224 3.9k
Q4801
DTC114EE
D4801
MA2S111
C4416
C4412
C4414
C4410
C4408
C4404
C4403
C4403–C4410
0.0047
C4405
C4407
C4409
C4411
C4411–C4414, C4416, C4417 0.001
C4413
C4417
T8V
T8V
C802
0.1
C4803
0.0047
C5101
0.0047
C5102
0.0047
C4415 0.1
SEND
REMOTE
J5001
CIV
CIVE
C4802
0.0047
14V
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
I
O
G
I
O
+
+
+
+
+
–
+
+
+
+
+
+
+
+
+
+
–
+
+
+
+
+
+
+
+
+
+
+
+
+
ESPO
SPE
COMS
MIGV
AMOD
AMS
STRT
5V
SNDS
8V
8V
HV
14V
14V
5V
8V
HV
14V
FSKK
MICE
MIC
SEND
SQLS
SEND
SEND
SEND
SPS
PHOE
PHOE
PHO
PHO
GND
GND
GND
GND
CIVE
CIV
ALMS
NC
KEY
DOT
DAS
VOX
AVX
SM
ALM
REF
REF
TX
FOR
FOR
PAT
BEE
DN
RX
TX
SBS
KDS
DSP
DSS
SST
DIN
DRE
DRE
DRE
DRE
DRE
AST
MST
FST
BST
MC
MC
MC
MC
MC
MC
MC
MDA
MDA
MDA
MDA
MDA
MDA
MDA
GND
DOTK
DASK
VOXL
AVXL
SML
ALML
REFL
FORL
PATL
BEEP
DNB
RXS
TXS
SBSY
KDS
DSPS
DSST
SSTB
DINT
DRES
ASTB
MSTB
FSTB
BSTB
MCK
MDAT
POWS
GND
GND
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
RFGV
ELEC-KEY
J5101
L5101 1H
L5102 1H
DAS
DOT
+
–
R2308
332KC
+
1
1 2
2
PLL unit J1
P1
P2
2LO
2LOE
Tx: 0V
Rx: 3.5V
Tx: 3.5V Rx: 0V
7.8V
Tx: 3.4V
Rx: 0V
1.1V
1.1V
3.0V
1.1V
AM ON: 0.6V
except AM: 3.4V
3.1V
6.8V
1.1V
AM ON: 0.6V
except AM: 3.5V
Tx: 0V
Rx: 6.5V
OP FILTER
Select: 4.6V
Unselect: 0.6V
OP FILTER
Select: 4.8V
Unselect: 0.6V
Tx: 0V
Rx: 5.8V
Tx: 0V
Rx: 5.8V
Tx: 0V
Rx: 0.4V
12.0V
7.2V
2.6V
4.3V
–4.5V
8.1V
8.2V
0.1V
AM ON: 0V
AM Tx: 9.2V
except AM Rx: 0V
AM ON: 0V
except AM: 7.5V
Tx: 0V
Rx: 1.1V
Tx: 0V
Rx: 0.4V
Tx: 0V
Rx: 2.1V
Tx: 0V
Rx: 6.0V
2.8V
Tx: 0V
Rx: 1.4V
Tx: 0V
Rx: 2.9V
Tx: 3.4V
Rx: 0V
Tx: 0V
Rx: 1.9V
Tx: 0V
Rx: 6.4V
Tx: 0V
Rx: 6.9V
13.5V
8.0V
q
w
e
r
t
t
y
u
i
@1
@2
@3
@4
@5
@6
@7
@8
@9
#0
#1
#2
#3
#4
#5
#6
#7
#8
#9
$0
$1
!5
!6
!7
!8
!9
@0
!0
!1
!2
!3
!4
o
$2
$3
$4
$5
$6
$7
$8
$9
Summary of Contents for IC-718
Page 29: ...SERVICE MANUAL ADDENDUM CONTENTS PARTS LIST 1 BOARD LAYOUTS 19 VOLTAGE DIAGRAM 25 Jun 2011 ...
Page 49: ...Jun 2011 20 C16 CP1 PLL UNIT BOTTOM VIEW FILTER UNIT BOTTOM VIEW PA UNIT BOTTOM VIEW ...
Page 81: ...SERVICE MANUAL ADDENDUM CONTENTS PARTS LIST 1 BOARD LAYOUTS 16 VOLTAGE DIAGRAM 18 Jul 2009 ...
Page 196: ...9 4 VARISTOR BOARD BOTTOM VIEW PLL UNIT BOTTOM VIEW PA UNIT ...
Page 200: ...9 8 BOTTOM VIEW FILTER UNIT ...
Page 206: ...1 1 32 Kamiminami Hirano ku Osaka 547 0003 Japan S 13701MZ C1 q 2000 Icom Inc ...