Icom IC-718 Service Manual Addendum page 122

Oct. 2008
PLL unit
WS1B
P1
2LO
1
PLL unit J1
2
2LOE
1 2
P2
+
2nd Lo
J401 Tx: 0V
Q511
1 2 Rx: 3.5V C511
q
100 DTC114EE
w
e
r
t
R511
Q501
R402 D502
R512 2.2k
18 MA2S111 DTC114EE
4.7k
+
R401 R403
C502
R502
270 270 R513 Q503
0.0047
R514 C503 1k
R2312
33k DTC114EE
33k 0.47
t 4.7k
L501
D401
L401 L402 LS-469
7.8V
HSB88WS D501
LR-358
LR-395
DAN202K
y
C401
R304
1k 470p R503
TMC3ADCS4X 47K
C510 + R501 +
C504
C506 C507
C307 C501 1 1k
0.0047 47
0.0047 0.0047 0.1
Tx: 3.5V Rx: 0V
u
i
o
R1310 R1311
Tx: 0V 2.2k 2.2k
Tx: 0V Tx: 0V
R1301 Rx: 1.1V Rx: 1.9V
Rx: 0.4V
1k
R1304
FI1301
R1302
L1301 L1302 D1301 L1303 4.7k
CFWS455HT 220 C1307
LS-468 LS-468 MA77 LS-468
0.1
1 2
3 4 5
D1302
MA77
R1305
C1301
R1300 C1305 1.8k
0.1
100k 0.1
!0
14V
!1
R8V
Tx: 0V
Tx: 0V
Q1508 Rx: 0.4V R1611
Rx: 5.8V Q1509 R1601
100
2SC4081 47
DTA114EE
!2 R1615
12.0V Q1601 10k
!3 C1602
2SC4081 0.001
Q1611
2SC4081
R1612
C1601
!4 R1603
332KCT
Tx: 0V 0.1 27k L1601
Q1507 R1520 R1521 C1515 C1516 R1522
LS-450
Rx: 5.8V 6.8k 1k 0.1
2SC4081 0.1 220
R1519
R1610
100 +
2.2k
7.2V
C1513
D1503
47
MA2S111 R1602 R1604 Q1602
470 47k
C1514 C1611 2SK882
Q1506
0.1
0.1
NBS DTC114EE
DN
!5
!6
!7 8V
!8
!9
Q1802 Q1803
D1802 C1815
UMD6 UMD6 MA2S111 150p
@0
R1809
R1813
4 3 4 3 R1812
100
2.6V 3.3k
15k D1803
R1808
5 2 5 2 1SS375
15k
4.3V
R1810
R1815
6 1 6 1 C1805
1M
R1814
0.47 22k
1k
R1807
+ +
10k Q1805
C1804 C1813
C1802 C1803 2SC4081
0.1 0.0047
2.2 1 –4.5V C1814
@1
C1812
10
100p
+
@2
@3
@4
@5
@6
R2204 IC2201
C2203
100k R2212 R2213 R2224
0.1 PC5023
@7
220k 220k
4.7k
13 12
NC VCC
R2214
14 11
AVI SWC
@8 4.7k
R2206 C2205 15 10 R2223
C2204
AVO VCAC
180k 100p 16 VCAO 9 6.8k
1
@9 MUTE +
17 VCAI 8
+
#0 VOXO
18 7 R2216 C2213 R2215
VOXI SWO
R2209
19 BU1O 6 47k 0.1 10k
BU2O
100k C2208 20 BU1I 5 R2217 C2214
C2215
BU2I
470p 47k R2219
#1 21 SWI 4 1 + 0.1
AMPO
22 3 56
AMP– CMPO
23 CMPI 2
D2202 D2201
R2211 C2210 AMP+ R2218
24 1
82k 470p GND NC 10k DA221 DA221
#2 R2220 R2221
+ +
220k 22k
#3
C2212
C2211 R2222 C2217 C2216
W2201 10
6.8k 0.039 0.1
10
#4
AAFO AFGV PHO PHOE
#5
#6
#7
R2707
C2710
100
1 10
#8 VCC2 VCC
2.2
2 9
#9
IN+ VCAOUT +
3 8 R2708
$0 IN–
CTL
4 VCAIN 7 27k C2720
OUT
+
5 NC 6 0.1
GND C2721 IC2702
100 C2723
IC2701 R2709 TA7368F
47
2.2k
M5282FP R2720 1 10 +
+ +
$1 NC POUT
10k
2 9
VCC PWGND
C2704 C2705
R2705 3 8
NC PREGND
10 10
4.7k 4 7
C2709
VIN PHASE
+ +
10 5 NF 6
RIPPLE
+ + +
C2703
R2706 C2706 R2710 R2721 C2722
10
4.7k 10 8.2k 560 47
C2708
10
$2
$3
$4
$5
$6
MP25
13.5V 8.0V IC3501
L3501 C3513 R3503
PC1555G2
IC3401 1M 0.1 10k
R3501
8
TA7808S 180 7 VCC
6 DISCHARGE
5 VTH
RESET 4
I O
VCONT
R3504
R3502
G
100k
180
+ +
C3402 C3403 C3404 C3501
+
+
C3401 0.1 0.1 100 47
100
C3502 C3503 C3504 C3505 C3506
0.1 22 0.1 0.0047 0.1
$7
$8
$9
AM ON: 0.6V AM ON: 0.6V
except AM: 3.4V except AM: 3.5V
8V
5V
T8V
ALC
WCNT
R509 R602 R604
R505
R504
22k 10k 33k 4.7k
100 I O
FI611
R605
R611 FL-65 R614
4.7k
10k 10k
R603 D601 D605
Tx: 0V
C508
33k DAP202K DAP202K
1.1V R613
0.1 Rx: 6.5V
100
Tx: 3.4V
D503
Rx: 0V
R612
DAN202K
C601
R506 5.6k
0.1 C611
C612
10k 6.8V
D602 D606
0.1 0.1
C509
R507 DAN202K DAN202K
0.0047
4.7k OP FILTER
R601 OP FILTER
R510 Select: 4.8V
10k
Select: 4.6V
10k Unselect: 0.6V R606
Unselect: 0.6V 10k
Q502
R508 R624
2SK882 R621 CP1621 CP1622
103KCT 3.3k
3.3k
3.0V
R623
R622 100
1.1V
5.6k
C1309 C621 C622
0.1 0.1 0.1
L1304
R1307
D603 D607
330H
6.8k
Tx: 0V
DAP202K DAP202K
Rx: 6.4V
R1306
470k
W1311 R633
C631
R631 1k
0.1
R635
Q1301 10k
10k
3SK131
Tx: 0V
Rx: 6.9V
R634
R632
100
C1308 R1308 C1310 C602
D604 D608
5.6k
0.1 220 0.1 C632 C633
0.1 DAN202K DAN202K
0.1 0.1
14V
8V
R8V
C1615
2.2 +
Tx: 0V
C1613
Rx: 6.0V
R1610 0.1 R1624
R1625
10k 470
470k
R1621 2.8V R1631
Tx: 0V
L1611 100 Q1603 10k
LS-450 Tx: 0V Rx: 2.9V
3SK131
Rx: 1.4V
R1622 D1631
C1625 L1621
DAN202K
2.2k
LS-450
0.1 C1632
R1617
Tx: 0V C1624 0.1
332KC R1623
0.1
Rx: 2.1V R1626
560
220k
C1621
C1631
C1623
0.1 R1627 R1632
R1614 0.1 0.1
332KC
10k
TMC3ADCS3X 4.7K
14V
8V
5V
ALC
R2001
R1904 C1905
100
47 0.0047 IC2001
C2002
L2001
TA4101F
100p
C2001 100H
C1904 C2010
R1905 0.1 5 BASE 4
BASE
0.1 0.1
6 OSCIN 3
100k BASE
C1901 7 VCC 2
R1901 R1903 GND
8 1
10k 3.3 1k IFOUT
D1901 COLECT
+ R1907 1SS375
1k +
C2003 C2004 C2007 C2008
R2002 C2005
R1902 0.1 0.1 0.1 0.1
C1902 22k 1
C1903
47k
0.0047 R1906 C2006
0.0047
56k 0.0047
SSBAF
8V
IC2351A
+ L2301
R2352 C2354
NJM2904M
100H
10 R2307
W2351 56k +
3 8 C2313
4.7k
+
1 C2312 R2319 0.1
C2304 C2303
R2353 47k 2
0.47
10 0.1 560
–
4 C2301
C2219
C2352 0.1
8.1V Q2381
0.47 C2353 R2318
0.0022
2SC4081R R2300
IC2351B 390P 560
R2305
560 +
R2381
NJM2904M 1k
D2381 8.2V
100k
5 C2305
0.1V 1SS375 C2306
+ R2387 R2386
7 10
0.1
D2301
6 R2384 10k 10k
– Q2383 Q2384 MA2S111
1k
R2301
R2383
DTC114EE DTC114EE R2317
22k 1k
+ 1k
+ +
R2382
C2381 C2383
R2385 C2384
470k C2382 C2380 AM Tx: 9.2V
10 10
10k AM ON: 0V 1
0.1 0.1 except AM Rx: 0V
AMS
SPS AFMS ESPO SPE
14V
8V
5V
–5V
R2722 T8V
R2903
47k 3.3
R2803
10k
D2701 L2901
5 4
DAP202K LR-270
1 2
+
3 R2804 C2904
C2905
IC2801 10k IC2901 0.1
1000
R2902
TC4S66F LA4425A
C2902
C2906 4.7
10 1 5
470
+ 4 +
C2801 2
R2805
0.1 C2901 C2903 R2901 C2907
3
1k
0.047 0.1
470 0.1
R3505
100
D3502
R3506
1 DA221
GND 100 L3502
TRG 2
1M –5V
+
OUT 3
C3507 C3510
C3509 C3511 C3512
47 C3508
0.1 10 0.1 47
+ +
47
+
D3503
MA8051
18
AMS
8V L4501 HF50ACC322513-B
ESPO
5V
T8V C4501
0.0047
SPE
C4502
1.1V 0.001
L4651 HF50ACC322513-B
8V
3.1V
L4652 10H
STRT
SEND L4653 HF50ACC322513-B
14V L4654 HF50ACC322513-B
L4656 10H
AAFO
2N3K
L4657 10H
AMOD
C4651 C4653 C4654 C4655 C4656
0.0047 0.0047 0.0047 0.0047 0.0047
L4658 100H
SQLS
2NOP
L4659 10H
FSK
L4660 10H
KEY
2NTH
L4661 100H
BAND
1.1V
Q4601
2SD1619T
SNDS
R4227 C4648 C4659 C4660 C4661
10k C4662 0.0047 0.0047 0.0047 0.0047
0.0047
DAS
L5101 1H
C603
DOT
0.1
L5102 1H
W4801
C5101 C5102
0.0047 0.0047
W4802
W4803
L4801
100H EP4801
EALC
C4801
RL4801
L4802
0.0047
AHY103
HF50ACC322513-B
D4801
MA2S111
14V
Q4801
C4802
DTC114EE
0.0047 C4803
T8V
0.0047
C802
0.1
Tx: 3.4V
Rx: 0V
C4411–C4414, C4416, C4417 0.001
R8V
T8V
14V
8V
5V STRT
5V
SNDS
8V
R1633 D1632
MA77 HV
100k
14V
R2003
FSK W4401
100
MICE
MIC
SEND
SQLS
R2004 SQLS
R2005
220
+
470 C4403–C4410
0.0047
C2009 SPS
R2006
10
330
PHOE
PHO
–5V
R2320 R2007 C2309 R2313
8.2k 2.2k 0.1 10k T8V
R2008 IC2301
R2308 2.2k
NJM1496V
332KC
1 V– 14 C2310
VS+
R2306
2 NC 13 0.1
VCS
330 3 VO– 12
VCS
4
NC 11 KEY
VS–
5 VC– 10
BIAS KEY C4401 C4402
6 NC 9
R2302
VO+ 0.0047 0.0047
7 VC+ 8
47k R2310
NC
1k
R2304
47k
+
R2303
R2321
C2315 C2314
4.7k 220k
0.47 0.1
C5001
Q2302 0.001
AM ON: 0V
DTC114EE
except AM: 7.5V
R8V
AMS
D4220 MA2S728
FOR
DOT
R4226 1k
DAS R4225 1k
VOX R4224 3.9k
AVX R4223 1k
SM
R4222 1k
ALM R4221 1k
REF R4220 1k
FOR R4219 1k
PAT R4218 1k
BEE R4217 1k
DN W4216
RX
R4215 1k
TX R4214 1k
SBS R4213 1k
KDS
R4211 1k
DSP
DSS R4210 1k
SST R4209 1k
DIN
R4208 1k
DRE R4207 1k
AST R4206 1k
MST
R4205 1k
FST R4204 1k
BST R4203 1k
MC
R4202 1k
MDA R4201 1k
POWS
MC
C4200
MC MDA
0.0047
MC MDA
MC MDA
MC MDA
MAIN UNIT
MDA
MC
MDA
HV
*; Refer to "PARTS LIST."
J4501
ESPO
EXT SP
SPE
J4502
P1
SP1
+
SPO 1 1
SPE
2 2
–
J4651
8V 1
GND 2
BDT 4
4 3 2 1
SEND 3
13.8V 8
8 7 6 5
7
12
AFO
12 11 10 9
13
MOD 11
ACC
SQLS 13
FSKK 10
9
KEY
BAND 5
ALC 6
J5101
GND
ELEC-KEY
J4801
ALC
ALC
SEND
SEND
BFO
J2001
P5
BFO BFO
1
1 PLL unit
BFOE BFOE
2 2 J2
PLL unit
WS2
30FLT-SM2-TB(LF)(SN)(M)
J4401
STRT
30
5V
29
SNDS 28
8V
27
8V
26
HV
25
14V
24
14V
23
FSKK
22
MICE
21
MIC
20
SEND
19
SQLS
to
18
SEND
17 LOGIC
SEND
unit
16
SEND J6
15
SPS
14
PHOE
13
PHOE
12
PHO
11
PHO
10
GND
9
GND
8
GND
7
GND
6
CIVE
5
CIV
4
ALMS
3
NC
2
KEY
1
J5001
CIV
REMOTE
CIVE
30FLT-SM2-TB(LF)(SN)(M)
J4201
GND
30
DOTK
29
DASK
28
VOXL
27
AVXL
26
SML
25
ALML
24
REFL
23
FORL
22
PATL
21
BEEP
20
DNB to
19
LOGIC
RXS
18
unit
TXS
17
J7
SBSY
16
KDS
15
DSPS
14
DSST
13
SSTB
12
DINT
11
DRES
10
ASTB
9
MSTB
8
FSTB
7
BSTB
6
MCK
5
MDAT
4
POWS
3
GND
2
GND
1