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Transceiver
IC-718
Service manual addendum
Icom IC-718 Service Manual Addendum page 142
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Also See for IC-718
:
Instruction manual
(87 pages)
,
Service manual
(54 pages)
,
Basic manual
(32 pages)
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Oct. 2007
BLOCK DIAGRAM
IC2701
IC2101A
OPTION
NJM2058
M5282FP
AFGV
AF
VCA
UT-102
UT-102
AMP
SIDE TONE/BEEP
IC2702
TA7368F
OPTION
TO MIC
AF
UT-106
AMP
IC2001
IC2801
TA4101
TC4566
AF
IC2102
D1901
MUTE
TC4W53
1SS375
IC2901
AF
AM
LA4425
DET
SELECT
PWR
AMP
SQL CONT
MIGV
IC2201
IC2351A
UPC5023
NJM2904
MIC
ANALOG
LPF
MASTER
CW
MIC
AM Carrier SET
IC2351B
NJM2904
Carrier
ALC
DET
KDS
IC1701A
NJM2058
ICH
ALC
ICL
AMP
POCV
IC1751A
NJM2904
IC1701B
NJM2058
METER
AMP
REF
ALC
AMP
IC1701C
NJM2058
ALC
AMP
FOR
Q3801 DTC114
Q3802 DTA114
T13
T13V
REG
IC3005
TD62783
TXS
T8
T8V
REG
IC3005
TD62783
RXS
R8
R8V
REG
Q1001 2SA1576
Q1002 DTC114EE
R13
R13V
REG
IC3005
TD62783
+8
8V
REG
IC3005
TD62783
PAT8
PAT8
REG
IC3501
UPC1555
14V
–5V
–5V
DC-DC
FSKK
KEYJACK
REMOTE
Q1508 2SC4081
Q1509 DTA114
GATE
CTRL
D1501
1SS375
Q1506
Q1507
DTC114
2SC4081
NB
DET
NB
NB
NBS
LEVEL
SW
AGC
AMP
NBLV
Q1504 2SC4081
Q1505 2SA1576
Q1601
Q1602
Q1603
3SK131
2SC4081
2SK882
USB, LSB, CW, RTTY
CERAMIC
IF
IF
BUFF
BPF
AMP
AMP
D1803
Q1805
FI611
1SS375
2SC4081
FL-65
AGC
AGC
AM
AGC
DET
AMP
SSB-N
IC1701D
RTTY-N
NJM2058
CW-N
XTAL
METER
BPF
AMP
(OPTION)
FL-52A
IC2301
FL-53A
MC1496
FL222
SET
PLL UNIT
Q30
Q32
2SC2714
2SC2714
2SC2714
LPF
AMP
AMP
SC-1246A
IC6
IC7
TC4SU69F
DDS
AMP
LOOP
FIL
LPF
Q35
2SC4081
BUFF
Q11
2SC2714
BFO
LPF
DDS
BUFF
IC2
SC-1287
Q10
2SC2714
2SC2714
2LO
BPF
× 2
18
Q1503
Q1502
Q1501
2SK882
2SK882
2SK882
NOISE
NOISE
NOISE
AMP
AMP
AMP
MAIN UNIT
FI1301
Q1301
3SK131
CFW455HT
D401
HSB88WS
CERAMIC
IF
NB
BPF
AMP
GATE
Q1201
D1301 D1302
3SK131
Q501
MA77×2
DTC114
IF
AMP
IF
CW
AMP
KEYING
Q502
2SK882
KDS
RF GAIN
ATT
Q28
2SC2714
64.485–97.455 MHz
LO
1Lo
BPF
AMP
Q29
Q26
2SC2714
AMP
BUFF
Q18 2SK508
64.485–97.455 MHz
VCA,etc
IC 3002
MODE
TD62783
IC1
BUFF
BPF
TA7805
5V
13V
+5
IC3003
REG
TD62783
BUFF
LPF
IC3005
TD62783
BUFF
Q9
IF FIL
X1
CR-337
32.000 MHz
IC104
TC7W32
DATA
DATA
SW
PTT
HV
below 1.6 M
LPF
1.6–2 M
BPF
2–4 M
LPF
4–8 M
BPF
Q1101, Q1102
Q1401, Q1402
FI301A, FI301B
2SK2171×2
FL-315
Q1103, Q1104
8–11 M
2SK1740×4
XTAL
PRE
LPF
BPF
BPF
AMP
Q201
2SC4673
IC3003
11–15 M
LO
PROS
PREAMP
AMP
BPF
SW
PRES
Q151
2SK882
15–22 M
IF
BPF
ATT
BPF
AMP
Q101, Q102
3SK131×2
22–30 M
IC1
PC1678
BPF
YGR
ATT
AMP
Q1
Q2,Q3
Q4,Q5
RD01MUS1
RD15HVF1×2
RD70HHF1×2
PRE
DRIVE
PWR
ATT
LPF
DRIVE
AMP
AMP
BIAS
BIAS
PA UNIT
D10,D11
D8,D9
DAN202U×2
DAN202U×2
FAN
FANV
CTRL
Q3601 2SD1664
IC2101D NJM2058
IC3301
M62352
D/A
IC3006
BU4094
SERI
FRONT UNIT
PARA
IC1 HD6473834H
AF VOL
IC3001
BU4094
A/D
DATA
RF/SQL VOL
SERI
PARA
A/D
IC40
TC7W32
IC3004
WAVE
BU4094
A/D
FORMER
SERI
PARA
A/D
CI-V
CPU
IC100
7W04
IC7
SMV
HD66100F
A/D
FOR
DISPLAY
LCD
A/D
DRIVE
REF
A/D
ALC
A/D
POWER
SW
Q1 DTC114
Q2 2SC4081
SEND
SW
IC5
IC6
TA78L05
TA7805
+5
+5
H5V
EEPROM
13V
REG
REG
IC2 X25320S
ATT
HPF
20 dB
ATT
ATTS
ATT
SW
IC3005 TD62783
LPF
0.03–2.0 M
RX
LPF
D2,D3
2.0–4.0 M
1SS375×2
TX
SWR
LPF
DET
4.0–8.0 M
LPF
8.0–15.0 M
LPF
FILTER UNIT
15.0–22.0 M
LPF
22.0–30.0 M
LPF
HV
SW
MAIN
DIAL
13V
SHIFT
RIT
I/F
10KEY
DS1
LCD
COMMON LINE
RX LINE
TX LINE
5V
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