Icom IC-718 Service Manual Addendum page 136

Oct. 2007
BOARD LAYOUTS
• MAIN UNIT (TOP VIEW)
to PA unit J6
WS1
to FILTER unit J1
10 P2
9
T13V
GND
REF
L3
W7 W6
FOR
L5
1st LO
L4
L2
from PLL unit
L1
L6 J4
2
P1
1
1LOE
J4001
CHASSIS 1LO
J1 J201
T13V 10
GND
REF
1LOE
L3
FOR
L5
L4 1LO
L2
L1
L6
1
J4201
1
2
to LOGIC unit J7
to FILTER unit J3
WS3
P6
W11 W10
SEND
P5
2
CHASSIS
1
J701
2 1
J4401
29 1 29
J401
from PLL unit
J1
2nd LO
30 2 30
to LOGIC unit J6
13
ACC
8V 1
GND 2
BDT 4
4 3
3
SEND
13.8V 8 8 7
7
AFO 12 12 11
ALC
MOD 11
13
SQLS 13
FSKK 10
ELEC-KEY
KEY 6
BAND 9
ALC 5
13
9 10 11 12
5 6 7 8
1 2 3 4
J3601
3 2 1
RED BLACK
3 1
CHASSIS
FAN MOTOR MF1
J4651
2 1
6 5
9
10
SPO
BFO
from PLL unit J2 SPE
1
BFO
EXT SP
BFOE 2
J2001 J4502
SPE
ESPO
SPO
SPO
SPE
1
SPO
SPEAKER
SP1
SPE
2
REMOTE
CIV
CIVE
J4101
1
TEMP
2 1 TEMP
KEY 2
KEY
STRT
STRT HV HV
ICH
PAT8
ICH
ICL
PAT8
14V
ICL
14V
14V
14V
14V
14V 14V
14V
PWS
14V
GND
14V
15 GND
PWS GND 16
GND
to PA unit J3
15
GND
GND
16